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Abdille AA, Kimani J, Wamunyokoli F, Bulimo W, Gavamukulya Y, Maina EN. "Dermaseptin B2’s Anti-Proliferative Activity and down Regulation of Anti-Proliferative, Angiogenic and Metastatic Genes in Rhabdomyosarcoma RD Cells in Vitro." Advances in Bioscience and Biotechnology. 2021;12:337-359. Abstract
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Abdirahman YA, Juma KK, Mukundi MJ, Gitahi SM, Agyirifo DS, Ngugi MP, Gathumbi PK, Ngeranwa JJN, Njagi ENM. "In-Vivo Antidiabetic Activity and Safety of The Aqueous Stem Bark Extract of Kleinia squarrosa." J Diabetes Metab. 2015;6(9):601.
Abdirahman FA, Wahome RG. "Assessment of the effects of Newcastle disease vaccination on chicken mortality and egg production rates in Machakos town sub-county, Kenya." International Journal of Livestock Production. 2022;12(4):168-175.
Abdissa N, Induli M, Akala HM, Heydenreich M, Midiwo JO, Ndakala A, Yenesew A. "Knipholone Cyclooxanthrone and an Anthroquinone Dimer with Antiplasmodial Activities from the Roots of Kniphofia Foliosa." Phytochemistry Letters . 2013;9(2):241-245.
Abdulaziz, M; Osinde K, Osinde K. "Sheng and English in Nairobi .". 1997.Website
Abdulaziz MH, Alfa SI. "Language and Social Change.". 1993.Website
ABDULHALIM DRHUSSEIN. "DESCRIPTIVE COMPARATIVE STUDY OF THE ORAL HEALTH STATUS OF CHILDREN WITH CLEFT LIP AND PALATE IN NAIROBI ( A MASTERS THESIS).". In: A MASTERS THESIS. The Indian Journal of Animal Sciences; Submitted. Abstract
No abstracts available
ABDULLAH DRHASSANMOHAMMED. "Modelling of irrigation Water Movement in a Distributed Runoff Model, Proceedings of the 51st Annual Conference of the Japanese Society of Irrigation, Drainage and Reclamation Engineering, Mie, Japan p. 558-559.". In: High Ridge Teachers College, Nairobi, Kenya for Ministry of Education, Kenya. University of Birmingham; 2002.
ABDULLAH DRHASSANMOHAMMED. "Changes and Improvement in Water Management Practices in the Mwea Irrigation Scheme, Kenya, Rural and Environmental Engineering Journal.". In: High Ridge Teachers College, Nairobi, Kenya for Ministry of Education, Kenya. University of Birmingham; 2003.
ABDULLAH DRHASSANMOHAMMED. "Modelling snowmelt in Thiba catchment in central Kenya, Proceedings of the 50th Annual Conference of the Japanese Society of Irrigation, Drainage and Reclamation Engineering, Iwate, Japan p. 98-99.". In: High Ridge Teachers College, Nairobi, Kenya for Ministry of Education, Kenya. University of Birmingham; 2001.
ABDULLAH DRHASSANMOHAMMED. "Distributed Hydrological Modeling of a Mountainous Catchment in Kenya, Irons. Of Japanese Society of Irrigation, Drainage and Reclamation Engineering. JSIDRE. No. 221. pp. 49-55.". In: High Ridge Teachers College, Nairobi, Kenya for Ministry of Education, Kenya. University of Birmingham; 2002.
Abdulrahman M, Maina EN, Morris MR, Zatyka M, Raval RR, Banks RE, Wiesener MS, Richards FM, Johnson CM, Latif F, others. "Identification of novel VHL targets that are associated with the development of renal cell carcinoma." Oncogene. 2007;26:1661-1672. Abstract
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Abdulrahman M, Maina EN, Morris MR, Zatyka M, Raval RR, Banks RE, Wiesener MS, Richards FM, Johnson CM, Latif F, Maher ER. "Identification of novel VHL targets that are associated with the development of renal cell carcinoma." Oncogene. 2007;26(11):1661-72. Abstract

von Hippel-Lindau (VHL) disease is a dominantly inherited family cancer syndrome characterized by the development of retinal and central nervous system haemangioblastomas, renal cell carcinoma (RCC) and phaeochromocytoma. Specific germline VHL mutations may predispose to haemangioblastomas, RCC and phaeochromocytoma to a varying extent. Although dysregulation of the hypoxia-inducible transcription factor-2 and JunB have been linked to the development of RCC and phaeochromocytoma, respectively, the precise basis for genotype-phenotype correlations in VHL disease have not been defined. To gain insights into the pathogenesis of RCC in VHL disease we compared gene expression microarray profiles in a RCC cell line expressing a Type 1 or Type 2B mutant pVHL (RCC-associated) to those of a Type 2A or 2C mutant (not associated with RCC). We identified 19 differentially expressed novel VHL target genes linked to RCC development. Eight targets were studied in detail by quantitative real-time polymerase chain reaction (three downregulated and five upregulated by wild-type VHL) and for six genes the effect of VHL inactivation was mimicked by hypoxia (but hypoxic-induction of smooth muscle alpha-actin 2 was specific for a RCC cell line). The potential role of four RCC-associated VHL target genes was assessed in vitro. NB thymosin beta (TMSNB) and proteinase-activated receptor 2 (PAR2) (both downregulated by wt pVHL) increased cell growth and motility in a RCC cell line, but aldehyde dehydrogenase (ALDH)1 and ALDH7 had no effect. These findings implicate TMSNB and PAR2 candidate oncogenes in the pathogenesis of VHL-associated RCC.

Abea FBO. "Enterprise Risk Management." KASNEB Newsline. 2012;3 (July - September)(No. 3):3-14.
Abea FBO. "Agency Problem." KASNEB Newsline. 2009;April - June(No. 2):17-26.
Abea FBO. "Transfer Pricing." KASNEB Newsline. 2011;October - December(Issue No. 4):Pg. 3-12.
Abea FBO. "Strategic Business Units (SBUs)." KASNEB Newsline. 2012;(October - December)(No. 4):3-8.
Abea FBO. "Payroll Management." KASNEB Newsline. 2008;October - December(Issue No. 4):Pg. 20-24.
Abea FBO. "Enterprise Risk Management." KASNEB Newsline. 2012;July - September(Issue No. 3):Pg. 3-14.
Abea FBO. "Transfer Pricing." KASNEB Newsline. 2011;,October - December(No. 4):3-12.
Abea FBO. "Agency Problem." KASNEB Newsline. 2009;April - June(Issue No. 2):Pg. 17-26.
Abea FBO. "Payroll Management." KASNEB Newsline. 2008;October - December(No. 4):20-24.
Abea FBO. "Strategic Business Units (SBUs)." KASNEB Newsline. 2012;October - December(Issue No. 4):Pg. 3-12.
Abebaw D, Holm-Müller. "Understorey light conditions and regeneration with respect to the structural dynamics of a near-natural temperate deciduous forest in Denmark.". 2006. AbstractWebsite

Risk perceptions play a key role in production and investment behavior of farmers. However, insufficient attention has been given to understand its nature and distribution in cash crop farming such as coffee. This study, therefore, attempts to explore patterns of coffee farmers’ perceived sources of risk and the factors associated with them. Data were drawn from a representative sample of 195 farmers residing in southwest Ethiopia. Farmers’ perceptions of risk are uneven and include price or market risks, crop diseases and pests, human illness, financial and natural elements. Farmers’ perceptions of the sources of risk can partly be explained by a combination of family and farm characteristics, location attributes, human capital, access to information and other infrastructure. In all, the results imply that farm advisors and policy makers can use these characteristics in targeting households and farmers’ groups for communicating relevant information about risk in coffee farming.

Abebaw D;, Mburu J;, Holm-Muller K. "Risk Perceptions and Risk Management — A Socioeconomic Analysis of Ethiopian Smallholder Coffee Growers."; 2004. Abstract

In recent years, coffee producers’ risk has become one of the major issues in the current discussions within the International Coffee Organisation (ICO) and its member countries. In Ethiopia, coffee growers deal with many risks while often lacking effective mechanisms to manage them. However, information concerning “which sources of risk to coffee income do the growers consider relevant” and “in what risk management tools they are interested in” is too scanty to gain an adequate understanding of their risk behaviour. Therefore, the main aims of this study were (1) to identify the extent and diversity of coffee growers’ perceived risks and preferred risk management strategies, and (2) investigate the variables influencing their risk perceptions and management responses. The data used in this study were gathered from a random sample of 195 smallholder coffee growers in southwest Ethiopia. Factor analysis and linear regression have been employed to analyse the data. Factor analysis identifies five latent variables that account for 62% of the total observed variations in the growers’ risk perceptions. Additionally, estimated results from linear regressions indicate that resource endowments, demographics, access to information and location attributes were statistically significant in explaining the observed variation in growers’ scores on the underlying risk perceptions (latent variables). In similar manner, factor analysis finds six latent risk management variables and explains about 64% of the observed variation in the growers’ preferences for various risk management strategies. Moreover, estimation results of the linear regression equations revealed that perceived risks, demographics, resource endowments, coffee income volatility, and location were statistically significant in explaining the growers’ scores on risk management preferences. Therefore, these information must be utilised to formulate effective and broadly accepted risk management policy and support to smallholder coffee growers.

Abinya NAO, Weinreb M, Day PJR, Niggli F, Green EK, Nyong'o A a, Riyal MS, Raafat F, Mann JR. "The Consistent Association Between Epstein-Barr Vir us and Hodgkin's Disease in Children in Kenya.". 1996. Abstractthe_consistent_association_between_epstein-barr_virus_and_hodgkins.pdfWebsite

Recent studies have suggested that Epstein-Barr virus (EBV) may play a role in the etiology of Hodgkin's disease (HD). In a previous study, we used a latent membrane protein 1 (LMP1)-specific antibodies to examine archival material from 74 British children with HD and found 50% of cases to be positive. It is known that there are geographic and ethnic variations in the incidence of HD. We have investigated LMP1 status in formalin-fixed, paraffin wax-embedded lymph nodes with HD involvement from 53 children and 48 adults from Kenya using immunohistochemical staining. We also developed sensitive and specific in vitro gene amplification protocols for examining the EBV strain type in such material using several combinations of primers derived from the EBNA 2 and EBNA 3 coding regions. LMP1 positivity was present in 100% of the pediatric cases (two lymphocyte-predominant, 25 nodular sclerosis, 16 mixed cellularity, 5 lymphocyte depletion, and 5 unclassified) and in 66% of the adult cases (two of three lymphocyte-predominant, 26 of 39 nodular, sclerosis, two of two mixed cellularity, and two of four lymphocyte depletion). Tests to type the EBV strain were undertaken in 25 EBV-positive pediatric cases. A combination of type-specific polymerase chain reactions for EBNA 2 and EBNA 3C genes indicated that seven patients had type 1, eight had type 2, and 10 had dual infections with both types. Five cases with dual infections were further investigated using a sensitive in situ hybridization for the EBV-encoded, small nuclear nonpolyadenylated RNAs (EBERs). EBER transcripts were detected in Reed-Sternberg and Hodgkin cells and in occasional infiltrating lymphocytes. These observations indicate that in Kenya EBV is consistently associated with pediatric cases of HD, and that biopsies from a number of such cases appear to carry both type 1 and type 2 viral sequences.

Abinya NA, Mwanda WO, Maina JMD, Odhiambo AO, Oyiro PO, Mwanzi SA, Dindi E, Waweru A. "Exploring Occupational and Familial Risks for Chronic Myeloid Leukaemia." Journal of US-China Medical Science . 2017;1(14):31-35.cml_risk_us-china_publ.pdf
Abinya ONA, LLEONCINII, Spinai D, A.Nyong'o, Minaccii C, Disantoi A, de lucai F, de viv A. "Neoplastic cells of hodgkin's disease show differences in ebv expression between kenya and italy.". 1996.
ABINYA NO, D.A.SPINA, LLEONCINII, MEGHA T, A NYONG'0, GALLORINII M. "CELLULAR KINETIC AND PHENOTYPIC HETEROGENEITY IN AND AMONG BURKITT'S AND BURKITT-LIKE LYMPHOMAS.". 1997.
ABINYA NO. "HLA system and cancer.". 2013.
Abinya ONA, Abwao HO, Bird P, Baraza R, BYAKIKA B, Kodwavwalla Y. Experience with breast cancer in a single oncology clinic in Nairobi.. Nairobi: University of Nairobi Press; 2006.
Abinya NAO, l.Wanyama, S.DOLA, Wellde BT, Chumo DA, Reardon MJ. "Treatment of Rhodesian sleeping sickness in Kenya.". 1989.
Abiodun, Adigun Ade; Odingo RS. "Basic Space Sciences In Africa.". 1983. AbstractWebsite

Through space applications, a number of social and economic programmes in education, communications, agro-climatology, weather forecasting and remote sensing are being realized within the African continent. Regional and international organizations and agencies such as the African Remote Sensing Council, the Pan-African Telecommunication Union and the United Nations system have been instrumental in making Africa conscious of the impact and implications of space science and technology on its peoples. The above notwithstanding, discernible interests in space research, to date, in Africa, have been limited to the work on the solar system and on interplanetary matters including satellite tracking, and to the joint African-Indian proposal for the establishment of an International Institute for Space Sciences and Electronics (INISSE) and the construction, in Kenya, of a Giant Equatorial Radio Telescope (GERT). During this “Transport and Communications Decade in Africa,” Africa's basic space research efforts would need to initially focus on the appropriateness, modification and adaptation of existing technologies for African conditions with a view to providing economic, reliable and functional services for the continent. These should include elements of electronics, communications, structural and tooling industries, and upper-atmosphere research. The experience of and collaborative work with India, Brazil and Argentina, as well as the roles of African scientists, are examined.

ABIY PROFYENESEW, O PROFMIDIWOJACOB. "Two prenylated flavonoids from the stem bark of Erythrina burttii.". In: Phytochemistry, 63, 445-448.; 2003. Abstract
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ABIY PROFYENESEW, O PROFMIDIWOJACOB, O PROFMIDIWOJACOB. "Two isoflavanones from stem bark of Erythrina sacleuxii.". In: Phytochemistry, 55, 457-459.; 2000. Abstract
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ABIY PROFYENESEW, O PROFMIDIWOJACOB. "Flavonoids and isoflavonoids with anti-plasmodial activities from the roots of Erythrina abyssinica.". In: Planta medica, 69, 658- 661.; 2003. Abstract
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ABIY PROFYENESEW, O PROFMIDIWOJACOB. "Antimicrobial flavonoids from the stem bark of Erythrina burttii.". In: Fitotherapia, 469-472.; 2005. Abstract
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ABIY PROFYENESEW, O PROFMIDIWOJACOB, O PROFMIDIWOJACOB. "Three isoflav-3-enes and a 2-arylbenzofuran from the root bark of Erythrina burttii.". In: Phytochemistry, 59, 337-341.; 2002. Abstract
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Aboge GO;, Kang’ethe EK;, Arimi SM;, Omore AO;, McDermott JJ;, Kanja LW;, Macharia JK;, Nduhiu JG;, Githua A. "Antimicrobial Agents Detected In Marketed Milk In Kenya."; 2000. Abstract

Drug residues in foods are a major public health concern in many countries, especially where most food sales bypass official quality assurance channels. In common with many tropical countries, sales of unpasteurized milk in Kenya account for over 85% of marketed milk. This milk is either sold directly from producers to consumers or via various cadres of informal market agents. Besides residues that may arise from lack of adherence to withdrawal times following cow therapy, there have been concerns that some antimicrobial agents may be added to informally marketed milk to extend its shelf life. As part of a large study to assess public health hazards associated with marketed milk, samples were collected seasonally between January 1999 and January 2000 from raw (unpasteurized) milk consuming households and informal market agents of various cadres. Pasteurised milk samples were also collected from retail points and tested for comparison. All samples were screened for antimicrobial residues using charm AIM-96 and Charm-ROSA (Charm Sciences Inc, USA) tests. The former detects a wide range of anti-microbials, and the latter detects β-lactams and tetracyclines specifically, at levels above maximum residue limits (MRLS) recommended by the European Union (EU). The Charm-AIM screening test showed that 9.4% and 5.7% of samples from consumer households and market agents had antimicrobial residues above EU MRLS, respectively. It was concluded that antimicrobial residues were more likely to have originated at farm-level than because of poor market handling practices.

Aboge GO, Terkawi M, Goo Y-K, Batbaatar V, Nishikawa Y, Sunaga F, Namikawa K, I I, Fujisaki K, Suzuki H, Xuan X. "Precursors of methotrexate target dihydrofolate reductase-thymidylate synthase of Babesia gibsoni.". 2010. Abstract

It is not known whether precursors of methotrexate, such as 2, 4-diamino-6-hydroxymethyl-pteridine (DAP) and 2, 4-diamino-N10-methyl-pteroic acid (DAMPA), could target the dihydrofolate reductase-thymidylate synthase (DHFR-TS) enzyme of Babesia and inhibit the parasite growth. Therefore, we have determined whether DAP and DAMPA as well as other chemically related compounds like pteroic acid (PA) and N10Triflouropteroic acid (N10TFPA) could target the DHFR-TS enzyme of B. gibsoni and inhibit its growth. DAMPA was a more-potent inhibitor of the B. gibsoni growth in vitro (50% inhibition concentration [IC50] = 2.4 ± 0.20 μM) [mean ± standard error of the mean] than DAP (IC50 = 78 ± 15 μM). Moreover, DAMPA potently inhibited enzymatic activity of recombinant DHFR-TS of B. gibsoni (IC50 = 2.6 ± 0.15 μM) than DAP (IC50 > 100 μM). In contrast, PA and N10-TFPA did not inhibit the activity of the recombinant enzyme and growth of B. gibsoni. The inhibition of the recombinant enzyme activity by DAMPA mirrored with inhibition of the parasite growth indicating that the purified recombinant enzyme could be used for preliminary screening of some antifolate precursors. Therefore, both DAP and DAMPA inhibit growth of B. gibsoni by targeting the DHFR-TS enzyme of the parasite.

Aboge GO;, Kang’ethe EK;, Arimi SM;, Omore AO;, McDermott JJ;, Kanja LW;, Macharia JK;, Nduhiu JG;, Githua A. "Antimicrobial Agents Detected In Marketed Milk In Kenya."; 2000. Abstract

Drug residues in foods are a major public health concern in many countries, especially where most food sales bypass official quality assurance channels. In common with many tropical countries, sales of unpasteurized milk in Kenya account for over 85% of marketed milk. This milk is either sold directly from producers to consumers or via various cadres of informal market agents. Besides residues that may arise from lack of adherence to withdrawal times following cow therapy, there have been concerns that some antimicrobial agents may be added to informally marketed milk to extend its shelf life. As part of a large study to assess public health hazards associated with marketed milk, samples were collected seasonally between January 1999 and January 2000 from raw (unpasteurized) milk consuming households and informal market agents of various cadres. Pasteurised milk samples were also collected from retail points and tested for comparison. All samples were screened for antimicrobial residues using charm AIM-96 and Charm-ROSA (Charm Sciences Inc, USA) tests. The former detects a wide range of anti-microbials, and the latter detects β-lactams and tetracyclines specifically, at levels above maximum residue limits (MRLS) recommended by the European Union (EU). The Charm-AIM screening test showed that 9.4% and 5.7% of samples from consumer households and market agents had antimicrobial residues above EU MRLS, respectively. It was concluded that antimicrobial residues were more likely to have originated at farm-level than because of poor market handling practices.

Aboge GO;, Kang’ethe EK;, Arimi SM;, Omore AO;, McDermott JJ;, Kanja LW;, Macharia JK;, Nduhiu JG;, Githua A. "Antimicrobial Agents Detected In Marketed Milk In Kenya."; 2000. Abstract

Drug residues in foods are a major public health concern in many countries, especially where most food sales bypass official quality assurance channels. In common with many tropical countries, sales of unpasteurized milk in Kenya account for over 85% of marketed milk. This milk is either sold directly from producers to consumers or via various cadres of informal market agents. Besides residues that may arise from lack of adherence to withdrawal times following cow therapy, there have been concerns that some antimicrobial agents may be added to informally marketed milk to extend its shelf life. As part of a large study to assess public health hazards associated with marketed milk, samples were collected seasonally between January 1999 and January 2000 from raw (unpasteurized) milk consuming households and informal market agents of various cadres. Pasteurised milk samples were also collected from retail points and tested for comparison. All samples were screened for antimicrobial residues using charm AIM-96 and Charm-ROSA (Charm Sciences Inc, USA) tests. The former detects a wide range of anti-microbials, and the latter detects β-lactams and tetracyclines specifically, at levels above maximum residue limits (MRLS) recommended by the European Union (EU). The Charm-AIM screening test showed that 9.4% and 5.7% of samples from consumer households and market agents had antimicrobial residues above EU MRLS, respectively. It was concluded that antimicrobial residues were more likely to have originated at farm-level than because of poor market handling practices.

Aboge GO;, Kang’ethe EK;, Arimi SM;, Omore AO;, McDermott JJ;, Kanja LW;, Macharia JK;, Nduhiu JG;, Githua A. "Antimicrobial Agents Detected In Marketed Milk In Kenya."; 2000. Abstract

Drug residues in foods are a major public health concern in many countries, especially where most food sales bypass official quality assurance channels. In common with many tropical countries, sales of unpasteurized milk in Kenya account for over 85% of marketed milk. This milk is either sold directly from producers to consumers or via various cadres of informal market agents. Besides residues that may arise from lack of adherence to withdrawal times following cow therapy, there have been concerns that some antimicrobial agents may be added to informally marketed milk to extend its shelf life. As part of a large study to assess public health hazards associated with marketed milk, samples were collected seasonally between January 1999 and January 2000 from raw (unpasteurized) milk consuming households and informal market agents of various cadres. Pasteurised milk samples were also collected from retail points and tested for comparison. All samples were screened for antimicrobial residues using charm AIM-96 and Charm-ROSA (Charm Sciences Inc, USA) tests. The former detects a wide range of anti-microbials, and the latter detects β-lactams and tetracyclines specifically, at levels above maximum residue limits (MRLS) recommended by the European Union (EU). The Charm-AIM screening test showed that 9.4% and 5.7% of samples from consumer households and market agents had antimicrobial residues above EU MRLS, respectively. It was concluded that antimicrobial residues were more likely to have originated at farm-level than because of poor market handling practices.

Aboge GO, Jia H, Kuriki H, Zhou J, Nishikawa Y, Igarashi I, Fujisaki K, Suzuki H, Xuan X. "Molecular characterization of a novel 32-kDa merozoite antigen of Babesia gibsoni with a better diagnostic performance by enzyme-linked immunosorbent assay.". 2007. Abstract

We cloned and expressed 3 novel gene encoding a 32-kDa merozoite protein of Babesia gibsoni (BgP32). The length of nucleotide sequence of the cD;\' A \\'3. 1-1-6-1 bp with an open reading frame of 969 bp. The truncated recombinant BgP32 (rBgP32) without a signal peptide and Cvterrninal hydrophobic sequence was expressed in Escherichia coli as a oluble glutathione- -rran ferase (GST) fusion protein. We stern blotting demonstrated that the native protein was 32-kDa, consistent with molecular weight of thc predicted mature polypeptide. Enzyme-linked irnmunosorbent assay (ELISA) using rBgP32 detected specific antibodi s from 8 days to 541 days post-infection in the sequential sera from a dog experimentally infected wirh B. gibsoni. Moreover. the antigen did not cross-react with B. canis subspecies and closely related protozoan parasites, indicating that rBgP32 is a specific diagnostic antigen. Analysis of 47 era taken from dogs with anaemic signs re ealed that rBgP32 detected a higher proportion of B. gibson! seroposirive sample' (77%) than its previou Iy identified rBgPSO (68%) homologue. These results indicate that the BgP32 is a novel immunodominant antigen of B. gibsoni, and rBgP32 might be useful for diagno is of B. gibsoni infection

Aboge GO, Jia H, Goo Y, Kuriki K, Nishikawa Y, Igarashi I, Suzuki H, Xuan X. "A novel 57-kDa merozoite protein of Babesia gibsoni is a prospective antigen for diagnosis and serosurvey of canine babesiosis by enzyme-linked immunosorbent assay.". 2007. Abstract

We isolated a novel single copy gene encoding a 57-kDa merozoite protein of Babesia gibsoni (BgP57). The nucleotide sequence of the cDNA was 2387 bp with an open reading frame (ORP) of 1644 bp encoding a 57-kDa predicted polypeptide having 547 amino acid residues. The recombinant BgP57 (rBgP57) without a predicted signal peptide was expressed in Escherichia coli as a soluble glutathione S-transferase (GST) fusion protein. Western blotting showed that the corresponding native protein was 57-kDa, consistent with molecular weight of predicted mature polypeptide. An indirect enzyme-linked immunosorbent assay (ELISA) using the rBgP57 detected specific antibodies in the sequential sera from a dog experimentally infected with B. gibsoni. Moreover, the antigen did not cross-react with antibodies to B. canis sub-species and closely related apicomplexan parasites indicating that the rBgP57 was a specific antigen for B. gibsoni antibodies. The diagnostic performance of ELISA based on rBgP57 using 107 sera from B. gibsoni-naturally infected dogs was the same as the previously identified rBgP32 but performed better than the previously studied rBgP50. Although, seminested peR detected higher proportions (82%) of positive samples than the ELISAs, the Mcnemar's chi-square test showed that there was no significant difference in relative effectiveness of rBgP57-ELISA and seminested peR (x2 = 2.70; P = 0.1003) in identifying positive samples. The rBgP57-ELISA when used in combination with rBgP32-ELISA and rBgP50-ELISA appeared to improve sensitivity of the rBgP57-ELISA for detection of B. gibsoni antibodies. Overall, the rBgP57-ELISA and seminested peR when used in combination, could improve epidemiological surveys and clinical diagnosis of B. gibsoni infection.

and Abok O. Elisha, Okoth W. Michael. KCANOB. "Microbiological Quality and Contamination Level of Water Sources in Isiolo County in Kenya." Journal of Environmental and Public Health. 2018;2018:1-10.
Abong GO, Okoth M, Kabira J, Ogolla J, Ouma J, Ngunju C, Odek K. "Physico-chemical changes in popular Kenyan Processing Potato varietisas influened by storage condition. Current Research in Nutrition in Food Science." Current Research in Nutrtion and Food Science. 2015;3(2):112-120.
Abong GO, Okoth MW, Imungi JK, Kabira JN. "Evaluation of selected Kenyan potato cultivars for processing into potato crisps." AGRICULTURE AND BIOLOGY JOURNAL OF NORTH AMERICA. 2010;1(5):886-893.
Abong GO, Okoth MW, Kabira JN, Ogolla J, Ouma J, Ngunju CW, Oded K. "Physico-Chemical Changes in Popular Kenyan Processing Potato Varieties as Influenced by Storage Condition." Current Research in Nutrition and Food Science. 2015;3(2):112-120.abong_2015a_physico-chemical_changes_potato_storage.pdf
Abong GO;, Okoth MW. "Edward G. Karuri1, Jackson N. Kabira2 and Francis M. Mathooko3."; 2009. Abstract

Potato is an important crop in Kenya, with a major role in food and income security, being second only to maize in terms of utilization.• Production occurs mainly in the highlands (1500-3000 m above sea level).• Many potato varieties including Roslin Eburu, Roslin ...

Abong GO, Okoth MW, Ogolla JA, Ouma J. "POTENTIAL OF PROCESSING POTATO FLAKES FROM POPULAR KENYAN POTATO VARIETIES.". 2011. Abstract

Losses of potatoes are incurred during seasons of glut and farmers are forced to sell their produce to middlemen at low prices due to short storage life of the raw tubers. Processing potatoes after harvesting into dehydrated products such as potato flakes is one of the ways to overcome the problem of inadequate and inappropriate bulk storage of raw potatoes. Potato flakes are known to be shelf stable and hence assure users of the availability of the produce all year round. This study was instituted to establish the potential of processing potato flakes from selected popular Kenyan potato varieties. Five potato varieties (Tigoni, Dutch Robjin, Desiree, Kenya Mpya, and Sherekea) which are popular commercially were used in this study. The varieties were harvested after maturity and processed into potato flakes before evaluation of retained vitamin C, color, oil and moisture content, and sensory attributes. The varieties used in this study had dry matter contents ranging from 18.2% to 23.7%. Oil content of the flakes was significantly (P≤0.05) lower in Dutch Robjin (0.23%) compared to Desiree (0.76%). Oil content of flakes significantly (p=0.011) but negatively correlated (r=-0.956) with dry matter content of the raw potatoes. Reduced ascorbic acid (vitamin C) in raw tubers differed significantly (P≤0.05) 2 among the varieties ranging from 90.37 mg/100g in Kenya Mpya to 127.56 mg/100g in Sherekea. The vitamin decreased in flakes, the reduction being higher in Kenya Mpya (60.34%) and Sherekea (71.71%) compared to Tigoni (18.15%) and Desiree (23.26%). Overall, Dutch Robjin was the best variety for flakes followed by Desiree and Tigoni with regard to overall acceptability. Sherekea was unacceptable while Kenya Mpya was barely acceptable. Promotion of these varieties for flakes processing will not only diversify the range of potato products, but also add value to local potatoes. .

Abong GO;, Okoth MW. "Edward G. Karuri1, Jackson N. Kabira2 and Francis M. Mathooko3."; 2009. Abstract

Potato is an important crop in Kenya, with a major role in food and income security, being second only to maize in terms of utilization.• Production occurs mainly in the highlands (1500-3000 m above sea level).• Many potato varieties including Roslin Eburu, Roslin ...

Abong GO, Okoth MW, Karuri EG, Kabira JN, Mathooko FM. "Levels of reducing sugars in eight Kenyan potato cultivars as influenced by stage of maturity and storage conditions." Journal of Animal & Plant Sciences. 2009;2(2):76-84.2009_-_redsugar_and_potato.pdf
Abong GO;, Okoth MW;, Imungi JK;, Kabira JN. "Consumption pattern and characteristics of potato crisps in Nairobi city, Kenya."; 2010. Abstract

Objective: To determine the consumption pattern and characteristics of potato crisps in Nairobi City, Kenya. Methodology and results: Potato crisps consumption pattern was studied using studied structured questionnaires to collect data from 215 crisps consumers. A total of 80 shops were surveyed to establish the brands and characteristics of potato crisps sold within Nairobi City. The available brands were then sampled and evaluated at the University of Nairobi. Of the sampled 215 consumers were males while 67.4 % were females. A majority, 73.9 % consumed potato crisps on average once a week. A part from gender, the frequency of purchasing crisps was also influenced by factors such as occasions, seasons and availability of money. Most consumers (22.3 %) preferred Tropical heat brand, 10.82 % preferred Krackles while the least (0.57 %) preferred Pringles, Delice and Highlands crisps. The most preferred flavor was onion and slightly salted crisps. The most purchased packaging units (51.7 %) ranged from 30-50 g due to affordability, retailing at Kshs. 30-40 (about 0.5 USD) compared to units of 150 g and above that were least purchased (1.7 %) due to their high costs, retailing at Kshs. 100 (about 1.5 USD) and above. A total of 28 % of the consumers bought crisps for self-consumption while 72 % purchased both for self and family members. All the outlets surveyed (100 %) sold potato crisps. Only 15 % of the outlets stocked potato crisps and other potato products such as chevda and potato sticks. A total of 24 brands of crisps were sold in Nairobi city. The most stocked brands in the outlets were Tropical heat and Krackles that were available in 46 and 45 % of the outlets surveyed, respectively. All the shops surveyed stocked brands of crisps made in Kenya while only 15.3 % of the outlets also had imported brands. The units of packaging ranged from less than 10 g to 1 kg. The most popular unit packages (40 %) varied from 10 to 100 g as they were cheap and affordable to most customers selling between Kshs. 10 to Kshs. 60. The study indicates that potato crisps are highly consumed by young children and youths in their teen ages while parents were moderate buyers of the products. Laboratory characteristics of the brands evaluated included colour, size, thickness, moisture, salt and oil contents that significantly (PB0.05) differed among the brands. The oil content ranged from 24.37 to 40.22 % while the moisture and salt contents varied from 1.09 to 5.45 %, and 1.10 to 2.96 %, respectively. Conclusions and application of results: Consumption of crisps in Nairobi city depends on gender, occasions, and seasons of the year and availability of disposable income. Except in the sizes, most brands had characteristics that conformed to the standards set for crisps. This study provides a view of the current scenario in the crisp market and is useful information to consumers, processors and policy makers in the potato sub sector.

Abong GO, Okoth MW, Karuri EG, Kabira JN, Mathooko FM. "Nutrient contents of raw and processed products from Kenyan potato cultivars." Journal of Applied Biosciences. 2009;16:877-886.
ABONG' MRGEORGEOOKO. "Evaluation of selected Kenyan potato cultivars for processing into French fries.". In: Journal of Animal and Plant Sciences, Vol. 2 (3): 141 . Biosciences; 2009.
ABONG' MRGEORGEOOKO. "Levels of reducing sugars in eight Kenyan potato cultivars as influenced by stage of maturity and storage conditions.". In: Journal of Animal and Plant Sciences, Vol. 2 (2): 76 . 1. George O. Abong; 2009.
ABONG' MRGEORGEOOKO. "Characteristics of the industry, constraints in processing, and marketing of potato crisps in Kenya." Journal of Animal and Plant Sciences. 2010;8(1):936-943. AbstractWebsite

There has been an increase in the number of potato crisps processors in Kenya in the last few decades. However, the characteristics of these firms are not clearly known. This study was designed to characterize the potato crisps processing industry in Kenya in terms of varieties used, pre-processing handling practices and constraints encountered. The potato crisps industry was surveyed between December 2009 and February 2010 using a structured questionnaire. Using labels of a total of 24 brands of potato crisps found selling in 80 supermarkets and kiosks in Nairobi, the processors were identified, contacted, visited and interviewed. Together 23 processors were identified and these had processing plants in Nairobi and Nakuru. The information collected included size of firm, range of products, constraints in processing crisps, marketing of the product and the variety of potatoes processed. The number of employees in the processing industries ranged from 2 to 250; 61 % of the processing firms had 5 or less employees, 22 % had 6-10 employees and only 4 % had 100 or more employees. In addition to potato crisps, 60 % of the firms also processed peanuts, 30 % processed chevda and potato sticks, 26 % processed pop-corns, 13 % processed banana crisps, 9 % processed cassava crisps and 4 % also processed arrow root crisps, spices, peas and herbs. About 4 % identified the main constraints as lack of proper equipment and market, 64 % complained of lack of potatoes and their poor quality while 43 % indicated lack of finances to increase volume of production. As pertains to produce sales, 83 % of the processors sell their products directly to supermarkets, 4 % through wholesalers and 13 % directly to individuals and shops. Dutch Robyjn was the potato cultivar of choice for many processors and other cultivars were used in processing during periods of scarcity of   cv. Dutch Robyjn. A large number of processors (70 %) stored their raw potatoes for relatively short periods of time ranging from 2 days to 3 weeks. A few (30 %) processing firms, stored potatoes for a month or longer. The potato crisps processing industry in Kenya is largely dominated by small scale processors who process crisps only as one of a diversity of other products. The industry is faced with several constraints including raw potato price fluctuations, scarcity and poor quality of potatoes, lack of facilities, skills and information on raw potato storage. The industry relies heavily on one variety that is not always available for all the processors. This information is important for potato breeders and postharvest technologists to avail sufficient suitable potato cultivars for crisping

ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., "Management of Higher Distance Education: A Case Study of University of Nairobi, 1999", In Press, UNESCO, Dakar.". In: In Press, UNESCO, Dakar. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1999. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., "Strengthening Primary and Secondary Education in Kenya: Implementation Capacity Assessment".World Bank and Government of Kenya, 2000.". In: World Bank and Government of Kenya, 2000. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2000. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., Management of Change: The Role of Educational Managers in Changing Educational Organisations. The Kenya Adult Educator, Vol.4, No. 2, 1999. Also in press, Papers in Education and Development. Journal of the Faculty of Education, University o.". In: The Kenya Adult Educator, Vol.4, No. 2, 1999; Also in press, Papers in Education and Development. Journal of the Faculty of Education, University of Dar-es-Salaam, 2000. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2000. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A. "Human Resource Development Indicators (HRDI) - The Kenyan Experience", paper presented during the Informal Meeting of Experts on Human Resources Development Indicators at the UNEP Headquaters, Nairobi, Kenya, December, 1992.". In: Paper presented during the Informal Meeting of Experts on Human Resources Development Indicators at the UNEP Headquaters, Nairobi, Kenya, December, 1992. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1992. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J. A., "Intrinsic Versus Extrinsic Rewards: An Analysis of the Motivation Levels of Three Job Factors Among Graduate Teachers in Siaya and Kiambu Districts, Kenya".". In: World Bank/Government of Kenya Project. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1994. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe J.A., Educational Management: Theory and Practice. Nairobi: Nairobi University Press.". In: Theory and Practice. Nairobi: Nairobi University Press. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1998. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., Language Policy and Practices in Education: Perceptions of Parents, Pupils and Teachers on the Use of Mother Tongue, Kiswahili and English in Kenyan Primary Schools. In press The Rockefeller Foundation, 2000.". In: In press The Rockefeller Foundation, 2000. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2000. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe,J.A. and Macharia, D. Managing the Learner Support System at the University of Nairobi. The Kenya Adult Educator, Vol. 5, NO.l, 2000.". In: The Kenya Adult Educator, Vol. 5, NO.l, 2000. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2000. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A. "Educational Management and Administration", Lecture Series presented during the Training of Trainers (TOT) for School Administrators inNasir, Sudan.". In: Lecture Series presented during the Training of Trainers (TOT) for School Administrators inNasir, Sudan. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1992. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A. and Abagi, O., Financing of Education in Kenya, UNDP/Govemment of Kenya Project.". In: UNDP/Govemment of Kenya Project. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1993. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., Education and Development, University of Nairobi, External Studies Lecture Series, 1997.". In: External Studies Lecture Series, 1997. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1997. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., Motivating Teachers and Students in Secondary Schools: A Conceptual Model. Huria , Journal of the Open University of Tanzania, Vol. Ill, No. 1, 2000.". In: Huria , Journal of the Open University of Tanzania, Vol. Ill, No. 1, 2000. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2000. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., Course Design and Development for Distance Higher Education: A Case Study of University of Nairobi, 2000", in Press UNESCO, Dakar.". In: in Press UNESCO, Dakar. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2000. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A., Human Resources Management: An Educational Perspective. Nairobi: Educational Development and Research Bureau, 2001.". In: Educational Development and Research Bureau, 2001. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 2001. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A. "Teaching Practice: Management and Supervision. Paper presented during the DSE/UoN Staff Development Workshop" in Jadini Beach Hotel, Mombasa, Kenya, .". In: Paper presented during the DSE/UoN Staff Development Workshop" in Jadini Beach Hotel, Mombasa, Kenya 1991. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1991. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, J.A. "Supervisory Management Course - Job Analysis and Description", Lecture Series presented to Supervising Managers with the Kenya Posts and Telecommunications, at the KCCT, Nairobi, Kenya.". In: Lecture Series presented to Supervising Managers with the Kenya Posts and Telecommunications, at the KCCT, Nairobi, Kenya, 1993. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1993. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
ABONG'O DROKUMBEJOSHUA. "Okumbe, et.al. Access, Quality and Equity Issues in Education: Costs and Financing of Secondary Education in Kenya, World Bank/Government of Kenya Project.". In: World Bank/Government of Kenya Project. DR. MARK NELSON AWORI; PROF. PANKAJ G. JANI; 1995. Abstract
Twenty variceal banding sessions were performed in eight patients between February 1995 and September 1996. A total of 69 rings were used to band the varices and at each session between two to six rings were used. Two of the eight had active bleeding and both underwent variceal banding to successfully arrest their bleeding as inpatients. Sixteen other variceal banding sessions were performed on an outpatient basis to obliterate their varices. Four of the eight patients had had sclerotherapy before and varices were still present. No acute or long term complications were noted. In one patient, variceal banding could not be performed as he developed stridor upon placement of the overtube. All the patients had advanced varices (Grade III or IV) and extended for more than 15 cms in the oesophagus. Endoscopic variceal obliteration remains the treatment of choice for patients with portal hypertension with variceal bleeding. Variceal banding is associated with a superior outcome when compared with sclerotherapy; the variceal kill time is shorter, infective complications less, rebleeding occurs less commonly and transfusion requirements are lower.
Abong' GO, Kabira J, Okoth MW, Ogolla JA, Ouma J. "Potential of processing potato flakes from popular Kenyan potato varieties.". In: CAB e Books.; 2015.
ABONG' MRGEORGEOOKO. "Influence of potato cultivar and stage of maturity on oil content of French fries made from eight Kenyan potato cultivars.". In: African Journal of Food, Agriculture, Nutrition and Development,Vol. 9 (8): 16667-1682. AJFAND; 2009.
Abong' GO, Okoth MW, Kabira JN. "Characteristics of fresh (ware) potato traders in Nairobi and Nakuru towns, Kenya.". In: Contribution of agriculture to achieving MDGs. Nairobi: IeCAB2010-eBook; 2010.fresh_potato_traders_characteristics.pdf
Abong' GO, Okoth MW, Imungi JK, Kabira JN. "Characteristics of the industry, constraints in processing, and marketing of potato crisps in Kenya." Journal of Animal & Plant Sciences. 2010;8(1):936-943.
Abong' GO, Okoth MW, J.K I, J.N K. "Evaluation of selected Kenyan potato cultivars for processing into potato crisps." Agriculture and Biology Journal of North America, 1(5): 886-893. 2010;1(5):886-893.potato_for_crisps_abstract_pdf.pdfWebsite
Abong' GO, Okoth MW, Karuri EG, Kabira JN, Mathooko FM. "Evaluation of selected Kenyan potato cultivars for processing into French fries." Journal of Animal & Plant Sciences. 2009;2(3):141-147.
Abong' GO, Kabira JN, Okoth MW. "Enhancing b-carotene, ascorbic acid and sensory properties of potato crisps using carrot powder as a flavoring agent .". In: Trends and opportunities in the production, processing and consumption of staple foods crops in Kenya. Dresden: TUD Press; 2013.
Abong' GO, Okoth MW, Imungi JK, Kabira JN. "Effect of packaging and storage temperature on the shelf life of crisps from four Kenyan potato cultivars." American Journal of Food Technology. 2011;6(10):882-892.2011_-_crisps_and_shelf_life.pdf
Abong' GO, Okoth MW, Imungi JK, Kabira JN. "Consumption patterns, diversity and characteristics of potato crisps in Nairobi, Kenya." Journal of Applied Biosciences. 2010;32:1942-1955.2010_-_crisps_and_consuption_kenya.pdf
Abong' GO, Okoth MW, Imungi JK, Kabira JN. "Consumption pattern and characteristics of potato crisps in Nairobi city, Kenya." Journal of Applied Biosciences. 2010;32:1942-1955.abstract_for_survey_1_pdf.pdf
Abong' GO, Okoth MW, Kabira JN. "Characteristics of fresh (ware) potato traders in Nairobi and Nakuru towns, Kenya.". In: Contribution of Agricultural Sciences towards achieving the Millenium Development Goals. Nairobi: FaCT Publishing, Kenya.; 2010.2010_-_potato_traders_e-book_publication.pdf
Abong' GO, Kabira JN. "The current status of the potato value chain in Kenya.". In: Trends and opportunities in the production, processing and consumption of staple foods crops in Kenya. Dresden: TUD Press; 2013.
Abong'o DA, Onyatta JO, Mbugua H. "The Effect of Septic Tanks Sewage Disposal System Distances on Borehole Water Quality in Ongata Rongai, Kajiado County, Kenya." European International Journal of Science and Technology. 2017;6(3):1-10.
Abong'o D, Wandiga SO. "Occurrence, distribution and environmental impact of organochlorine pesticide resedues in the Lake Victoria catchment: a case study of River Nyando drainage basin.". 2009. AbstractFull text link

The study was to investigate the impacts on the ecosystem health in relation to levels and distribution of organochlorine pesticides that have either been banned or restricted for use in Kenya. The pesticides targeted were DDT, lindane, aldrin, dieldrin, heptachlor, endrin, endosuphan, and methoxychlor. Prior to their ban or restriction in use, they had found wide applications in public health and agriculture for control of disease vectors and crop pests respectively.

A study was conducted in which 880 samples of soil, water, sediments, aquatic weeds and benthic macroinvertebrates were collected from 26 locations representative of the River Nyando drainage basin catchment area of 3450 km2 and a total length of 170 km of the Lake Victoria Catchment over a period of two years. Soils from six farms were sampled in areas where maize, tea, sugar cane, col fee, rice and vegetables have been grown over the years. The objective was to investigate the impacts on the ecosystem health in relation to levels and distribution of oraganochlorine pesticides that have either been banned or are restricted for use in Kenya. The pesticides targeted were DDT, lindane, aldrin, dieldrin, heptachlor, endrin, endosulfan and methoxychlor. Pior to their ban or restriction in use, they had found wide applications in public health and agriculture for control of disease vectors and crop pests respectively. Analysis of 48 soil samples revealed presence of all the targeted pesticides. Mean concentrations (pg/kg) recorded decreased in the order methoxychlor (138.97±1.517 pg/kg), total (X) endosulfan (30.267±2.098pg/kg), £DDT (17.513± 1.689 pg/kg), dieldrin (14.073±0.440 pg/kg), endrin (10.155±0.860 pg/kg), lindane (8.985±1.318 pg/kg) and ^Heptachlor (0.681±0.021 pg/kg), respectively. The distribution showed that dieldrin was in use in vegetable farms in Kedowa area, tea farms in Nandi District and in Ahero rice paddies; while p-endosulfan was commonly used on tea farms in Nandi. Water analysis from the 26 sampling sites showed the highest mean concentrations were detected for methoxychlor (8.817±0.020 pg/L), ^endosulfan (1.648± 0.04 pg/L), dieldrin (1.1561± 0.042 pg/L), endrin (0.281± 0.003 pg/L), £DDT (0.242±0.009 pg/L), £heptachlor (0.148±0.01 lpg/L) and lindane (0.144±0.006pg/L) respectively. The detected levels in sediments were considerably higher than those found in water in the order, methoxychlor (92.893±3.039 pg/kg ), lindane (33.917±2.360 pg/kg), aldrin (26.676±0.981 pg/kg ), dieldrin (23.62±4.810 pg/kg) and P-endosulfan, (10.502±0.800 pg/kg), respectively. The analysis of aquatic weeds recorded methoxychlor (39.641±3.045 pg/kg) as the highest residue concentrations, followed by aldrin (15.519±3.756 pg/kg). These higher levels may be as a result of continued use of the pesticide in the drainage basin. The levels of pesticides were higher in sediment, weeds and soil than in water. The pooled results show that the targeted pesticides are still in use in the basin and could be impacting negatively on the ecosystem health of the area. A study of the composition of the benthic macroinvertebrates showed presence of four invertebrate phyla in River Nyando. These were Arthropoda, Mollusca, Plathelminthes and Annelida. A diversity of 16 families and eleven orders was recorded, with the order Ephemeroptera being abundant upstream followed by Hemiptera, Plecoptera and Trichoptera respectively. The downstream sections mainly the rice farming areas were dominated by Hirudinae (leaches) and Oligochaeta, suggesting that they are less sensitive to environmental pollution. Using Multivariate analytical techniques, Redundancy Analysis and Canonical Correspondence Analysis, correlation statistics showed that the occurrence of organochlorine pesticides strongly affects the distribution of the benthic macro invertebrates at all the sampling locations within the drainage basin. The high concentrations of pesticide residues were detected mostly in the soils and water from rice farms, these magnitudes were followed by those from tea farms. This implies that the rice farmers use most pesticides followed by tea farmers and there the proximity of the rice paddies to Lake Victoria could pose a greater impact to ecosystem health in the entire catchment than the upstream tea, sugar cane, maize and coffee farms owing to pesticide discharge; and this call for stringent management measures to be put in place to safeguard the environment.

Abong'o DA, Wandiga SO, Jumba IO, den Brink PJV, Naziriwo BB, Madadi VO, WAFULA GA, Nkedi-Kizza P, Kylin H. "Occurrence, abundance and distribution of benthic macroinvertebrates in the Nyando River catchment, Kenya." African journal of aquatic science. 2015;40(4):373-392. Abstract

Description
A baseline study was conducted of the occurrence of macroinvertebrates at 26 sites in the Nyando River catchment in 2005–2006. A total of 13 orders and 16 families of Arthropoda, Mollusca, Platyhelminthes and Annelida were collected, with the order Ephemeroptera being most abundant in the up- and mid-stream reaches, followed by Hemiptera and Plecoptera respectively. The downstream sections of the river were dominated by Hirudinea and tubificids, as the water quality deteriorated mainly due to local land use, raw sewage effluent discharge and annual floods. Insects and annelids were the main invertebrates found and the extent of pollution increased from mid-section (Site 15) downwards as the river flowed into the Winam Gulf. Stringent management measures are required to safeguard the environment and ecosystems of Lake Victoria.

Abong'o DA, Wandiga SO, Jumba IO, den Brink PJV, Naziriwo BB, Madadi VO, WAFULA GA, Nkedi-Kizza P, Kylin H. "Occurrence, abundance and distribution of benthic macro invertebrates in the Nyando River catchment, Kenya." African Journal of Aquatic Science. 2015;40 (4)(1608-5914):373-392.
den Abong'o, DA WSOJBPJVNBBMVOWAFULAGAN-KKIOP. "Occurrence, abundance and distribution of benthic macro invertebrates in the Nyando River catchment, Kenya." African Journal of Aquatic Science. 2018.
Abong'o DA, Wandiga SO, Jumba IO. "Occurrence and distribution of organochlorine pesticide residue levels in water, sediment and aquatic weeds in the Nyando River catchment, Lake Victoria, Kenya." African Journal of Aquatic Science . 2018;48(3): 255-270 . Abstractdoi. org

Samples of water, sediments and aquatic weeds were collected from 26 sites in the Nyando River catchment of the Lake Victoria basin in 2005–2006. The objective was to investigate levels of organochlorine pesticides that have either been banned or are restricted for use in Kenya. The pesticides investigated were lindane, aldrin, endosulfan, endrin, dieldrin, DDT, heptachlor and methoxychlor. These pesticides had previously found wide applications in public health and agriculture in Kenya for control of disease vectors and crop pests respectively. Results showed that mean concentrations were highest for methoxychlor (8.817 ± 0.020 µg l−1) in water, sediments (92.893 ± 3.039 µg kg−1), and weeds (39.641 ± 3.045 µg kg−1), the weeds also tended to accumulate aldrin (15.519 ± 3.756 µg kg−1). The results show that the pesticides are still in use and are detected in the catchment. Stringent management and public awareness measures are required to enforce the ban on the organochlorine pesticides in order to safeguard the environment and ecosystems of Lake Victoria.

Abong’ GO, Kabira JN. The current status of potato value chain in Kenya. Hotel intercontinental, Nairobi: TUD press; 2013.potato_value_chain_abstract_for_staple_food_conf_april_2013.docx
Abong’ GO, Shibairo SI, Lamuka PO, KATAMA CK, Ouma J. "QUALITY AND SAFETY CHARACTERISTICS OF CASSAVA CRISPS SOLD IN URBAN KENYA." African Crop Science Journal. 2016;24(S1):89-94.abong__2016aquality_and_safety_cassava_crisps.pdf
Abong’ GO, Shibairo SI, Okoth MW, Lamuka PO, KATAMA CK, Ouma J. "QUALITY AND SAFETY CHARACTERISTICS OF CASSAVA CRISPS SOLD IN URBAN KENYA." African Crop Science Journal. 2016;24(sl):89-94.
Abong’ GO, Kabira JN. "Diversity and Characteristics of Potato Flakes in Nairobi and Nakuru, Kenya." Global Journal of Science Frontier Research (D). 2012;12(10):35-39.potato_flakes_survey_kenya.pdf
Abong’ GO, Kabira JN, Okoth MW. "Enhancing β-carotene, ascorbic acid and sensory properties of potato crisps using carrot powder as a flavoring agent.". In: Trends and opportunities in the production, processing and consumption of staple food crops in Kenya-Conference. Hotel intercontinental, Nairobi; 2013.flavored_crisps_for_staple_foods_conference_abstract.doc
ABONG’ GEORGEOOKO, NDANYI VICTORIACLAIREMAKUNGU, KAAYA ARCHILEO, Shibairo S, Okoth MW, OBIMBO PETER. "A Review of Production, Post-harvest Handling and Marketing of Sweetpotatoes in Kenya and Uganda." Current Research in Nutrition and Food Science. 2016;4(3):162-181.abong_2016b_a_review_sweetpotatoes_kenya__uganda.pdf
ABONG’ GEORGEOOKO, Shibairo S, WANJEKECHE ELIZABETH, OGENDO JOSHUA, WAMBUA TOM, Lamuka P, ARAMA PETER, Okoth M. "Post-Harvest Practices, Constraints and Opportunities Along Cassava Value Chain in Kenya." Current Research in Nutrition and Food Science. 2016;4(2):114-126.
Abong’ DA, Wandiga SO, Jumba IO. "Occurrence and distribution of organochlorine pesticide residue levels in water, sediment and aquatic weeds in the Nyando River catchment, Lake Victoria, Kenya." African Journal of Aquatic Science. 2018;43(3):255-270. AbstractAfrican Journal of Aquatic Science

Description
Samples of water, sediments and aquatic weeds were collected from 26 sites in the Nyando River catchment of the Lake Victoria basin in 2005–2006. The objective was to investigate levels of organochlorine pesticides that have either been banned or are restricted for use in Kenya. The pesticides investigated were lindane, aldrin, endosulfan, endrin, dieldrin, DDT, heptachlor and methoxychlor. These pesticides had previously found wide applications in public health and agriculture in Kenya for control of disease vectors and crop pests respectively. Results showed that mean concentrations were highest for methoxychlor (8.817 ± 0.020 µg l−1) in water, sediments (92.893 ± 3.039 µg kg−1), and weeds (39.641 ± 3.045 µg kg−1), the weeds also tended to accumulate aldrin (15.519 ± 3.756 µg kg−1). The results show that the pesticides are still in use and are detected in the catchment. Stringent management and …

Abong’o DA, Wandiga SO, Jumba IO, den P PVBJ, Naziriwo BB, Madadi VO, Wafula GA, Kizza PN-, Henrik K. "Occurrence, abundance and Distribution of Benthic Macro-invertebrates in the Nyando River Catchment, Kenya." Africa Journal of Physical Sciences. 2015;40(4): 373-392.
Abong’o DA, Wandiga SO, Jumba IO, Madadi VO, Kylin H. "Impacts of Pesticides on Human Health and Environment in the River Nyando Catchment, Kenya." Best: International Journal of Humanities, Arts, Medicine and Sciences (BEST: IJHAMS) ISSN( E): 2348-0521. 2014;2(3):1-14. Abstract

River relies on rain fed agriculture. Important crops grown include cereals, cash crops fruits and vegetables. Farming is one of the contributors’ of pollution to Lake Victoria. Organophosphates and other banned organochlorine pesticides such as lindane, aldrin and dieldrin were used by farmers. The pesticides transport was by storm water run-off and air drift into the lake. Environmental risk assessment background information was collected through questionnaire and interviews of farmers to determine knowledge and safe use of pesticides. Fourteen pesticides were identified as commonly used of which four are toxic to bees and five to birds. The farmers identified declines in the number of pollinating insects, the disappearance of Red-billed Oxpecker (Buphagus erythrorthynchus) and wild bird’s fatalities. The general knowledge among farmers about chemicals risks, safety, and chronic illnesses was low. Activities that increases environmental awareness and safety of pesticides should be initiated by the agrochemical firms and government
KEYWORDS: Environment, Farming, Lake Victoria, Pesticides

Abonyo E. "SETTLEMENT INTEGRATION AN INNOVATIVE ROLE FOR PROFESSIONALS.". In: A world social forum. Nairobi; 2007.
Abonyo E. "THE ROLE OF PROFESSIONALS AND PROFESSIONAL INSTITUTES, IN SETTLEMENT UPGRADING.". In: ILI SHE TRUST HOUSING CONFERENCE. MOMBASA , Kenya; 2006.
Abou-Awad BA, El-Banhawy EM. "New mites of the family Eriophyidae from Kenya (Acari: Eriophidae). Acarologia, 32: 329.". In: Published by the Democratization and Research Centre, Rome, Vol. 27, No. 3, March. El-Banhawy, E. M.; 1991. Abstract

We surveyed the phytoseid mites in four different geographical zones of Kenya: Zone I, upper highland and tropical alpine (2400-4400m): Zone II, lower highland (1800-2400m); zone III, midland (800-1800m); Zone IV, tropical, hot and humid( 0-800m ). A total of 107 species was found. In the sub family, amblyseeinae there were 14 species in the genus Neoseilus , one in Aspereroseius Chant, one in Paraphytoseius Swirski &Schechter, five in typhlodromips De Leon, five in Transeius Chant & McMurty, one in Graminaseius Chant &McMurty, 11 in Amblyseius Berlese, one in Arrenoseius Wanstein, two in Typhlodromalus muma, seven in Ueckemannseius Chant &McMurty, one in Ambylodromalus Chant &Mcmurty,, 20 in Euseius Wanstein, one in Iphiseius Berlese, one in Phytoseilus Evans and one in Gynaseius Ehara & Imano. In the subfamily Phytoseiinae Berlese there were four species in the genus Phytoseiius Ribaga. In the subfamily Typhlodrominae Wanstein, there were four species in the genus Kuzinellus Wainstein and 27 in Typhlodromus Scheuten

Abou-Awad BA, El-Banhawy EM. "A new genus in the subfamily Nothopodinae with description of four new species from East Africa (Acari : Eriophyoidea : Eriophyidae). Acarologia, 33: 157.". In: Published by the Democratization and Research Centre, Rome, Vol. 27, No. 3, March. El-Banhawy, E. M.; 1992. Abstract

We surveyed the phytoseid mites in four different geographical zones of Kenya: Zone I, upper highland and tropical alpine (2400-4400m): Zone II, lower highland (1800-2400m); zone III, midland (800-1800m); Zone IV, tropical, hot and humid( 0-800m ). A total of 107 species was found. In the sub family, amblyseeinae there were 14 species in the genus Neoseilus , one in Aspereroseius Chant, one in Paraphytoseius Swirski &Schechter, five in typhlodromips De Leon, five in Transeius Chant & McMurty, one in Graminaseius Chant &McMurty, 11 in Amblyseius Berlese, one in Arrenoseius Wanstein, two in Typhlodromalus muma, seven in Ueckemannseius Chant &McMurty, one in Ambylodromalus Chant &Mcmurty,, 20 in Euseius Wanstein, one in Iphiseius Berlese, one in Phytoseilus Evans and one in Gynaseius Ehara & Imano. In the subfamily Phytoseiinae Berlese there were four species in the genus Phytoseiius Ribaga. In the subfamily Typhlodrominae Wanstein, there were four species in the genus Kuzinellus Wainstein and 27 in Typhlodromus Scheuten

Abou-Awad BA, El-Banhawy EM. "Biological studies of Amblyseius olivi, a new predator of eriophyid mite infesting olive trees in Egypt (Acari : Phytoseiidae). Entomophaga, 31: 99.". In: Published by the Democratization and Research Centre, Rome, Vol. 27, No. 3, March. El-Banhawy, E. M.; 1986. Abstract

We surveyed the phytoseid mites in four different geographical zones of Kenya: Zone I, upper highland and tropical alpine (2400-4400m): Zone II, lower highland (1800-2400m); zone III, midland (800-1800m); Zone IV, tropical, hot and humid( 0-800m ). A total of 107 species was found. In the sub family, amblyseeinae there were 14 species in the genus Neoseilus , one in Aspereroseius Chant, one in Paraphytoseius Swirski &Schechter, five in typhlodromips De Leon, five in Transeius Chant & McMurty, one in Graminaseius Chant &McMurty, 11 in Amblyseius Berlese, one in Arrenoseius Wanstein, two in Typhlodromalus muma, seven in Ueckemannseius Chant &McMurty, one in Ambylodromalus Chant &Mcmurty,, 20 in Euseius Wanstein, one in Iphiseius Berlese, one in Phytoseilus Evans and one in Gynaseius Ehara & Imano. In the subfamily Phytoseiinae Berlese there were four species in the genus Phytoseiius Ribaga. In the subfamily Typhlodrominae Wanstein, there were four species in the genus Kuzinellus Wainstein and 27 in Typhlodromus Scheuten

Abou-awad, B. A, El-Banhawy EM. "Toxicity of the organophosphate, methamidophos and pyridaphenthion, the synthetic pyrethroid, cypermethrin, and the systemic fungicide fenarimol to the adult and egg stages of the datura mite, Eriophyes datura (Acari : Eriophyidae). Bull. Ent. Soc. Egypt,.". In: Published by the Democratization and Research Centre, Rome, Vol. 27, No. 3, March. El-Banhawy, E. M.; 1985. Abstract

We surveyed the phytoseid mites in four different geographical zones of Kenya: Zone I, upper highland and tropical alpine (2400-4400m): Zone II, lower highland (1800-2400m); zone III, midland (800-1800m); Zone IV, tropical, hot and humid( 0-800m ). A total of 107 species was found. In the sub family, amblyseeinae there were 14 species in the genus Neoseilus , one in Aspereroseius Chant, one in Paraphytoseius Swirski &Schechter, five in typhlodromips De Leon, five in Transeius Chant & McMurty, one in Graminaseius Chant &McMurty, 11 in Amblyseius Berlese, one in Arrenoseius Wanstein, two in Typhlodromalus muma, seven in Ueckemannseius Chant &McMurty, one in Ambylodromalus Chant &Mcmurty,, 20 in Euseius Wanstein, one in Iphiseius Berlese, one in Phytoseilus Evans and one in Gynaseius Ehara & Imano. In the subfamily Phytoseiinae Berlese there were four species in the genus Phytoseiius Ribaga. In the subfamily Typhlodrominae Wanstein, there were four species in the genus Kuzinellus Wainstein and 27 in Typhlodromus Scheuten

Abraham Kipchumba Cherwon, Margaret Mwihaki Wanyoike, Gachuiri CK. "Rabbit production practices in Kiambu County, Kenya." International Journal of Livestock Production. 2020;11(4):114-121.
ABSALOMS HO. Status of iLabs in sub-Sahara Africa (iLabs-Africa). New York: Carnegie Corporation of New York; 2009.
Absaloms HO, others. PCB CAD Training Manual.; 1994.
Absaloms HO. Genetic Algorithm Application to Image Processing Optimization Problems. Atsugi, Japan: Kanagawa Institute of Technology; 1998.
Absaloms HO. The Yagi-Uda Array. Nairobi, Kenya: University of Nairobi; 1988.
U
UWESO DRABUBAKARLAILA, Abubakar LU, Kenya EU, Muhoho A. Microalgae species biodiversity and abundance and their potential for biofuel in Kenya. Nairobi, KENYA; 2011. Abstractabstract-ncst.pdf

Background:
Marine invertebrates rely solely on innate immune mechanisms, the cellular component of which is characterized by hemocytes that phagocytize microbes and secrete soluble antimicrobial and cytotoxic substances. In this regard, marine invertebrates are a potential source of promising antimicrobial compounds with novel mechanisms of action.
Objective:
The objective of this study was to evaluate extracts of the gut, gonad, spines and mouth parts of the sea urchin Tripneustes gratilla for antimicrobial and haemolytic activities in vitro.
Methods:
Potentially bioactive metabolites were extracted using methanol and chloroform and tested for activity against Salmonella typhi, Escherichia coli, Shigella sonnei, Pseudomonas aeruginosa and Penicillium spp. using the agar disc diffusion method. Toxicity was determined by assaying for hemolysis against human red blood cells.
Results:
Bioactivity against the tested bacteria was observed mainly with the methanol and chloroform extracts of the gonads and gut. Higher antibacterial activity was present in the methanol extracts compared to chloroform extracts.
Activity against the Penicillium spp was detected only in the methanol extracts, while the chloroform extracts showed no activity. The various extracts of the sea urchin lacked any detectable hemolytic activity against human erythrocytes.

Discussion:
These research findings suggest that marine echinoderms are a potential source of novel antimicrobial compounds.
Key words:
Tripneustes gratilla, antimicrobial activity, marine invertebrates

A
Abubakar LU, Mutie AM, Kenya EU, Muhoho A. "Characterization of algae oil (oilgae) and its potential as biofuel in Kenya." Journal of Applied Phytotechnology in Environmental Sanitation . 2012;1 (4):147-153.abstract-apes.pdf
Abubakar LU, Bulimo WD, Masiga D, Mulaa FJ, Osir EO. Analysis of a serine protease gene expressed in midgut of African trypanosome vector, glossina fuscipes fuscipes.. University of Nairobi, Kenya; 2004. Abstract

n/a

Abubakar LU, Mwangi CN, Uku J, Ndirangu S. "Antimicrobial activity of various extracts of the sea urchin Tripneustes gratilla (Echinoidea)." African Journal of Pharmacology and Therapeutics . 2012;1(1): 19-23. Abstractabstract-ajpt.pdfWebsite

Background:
Marine invertebrates rely solely on innate immune mechanisms, the cellular component of which is characterized by hemocytes that phagocytize microbes and secrete soluble antimicrobial and cytotoxic substances. In this regard, marine invertebrates are a potential source of promising antimicrobial compounds with novel mechanisms of action.
Objective:
The objective of this study was to evaluate extracts of the gut, gonad, spines and mouth parts of the sea urchin Tripneustes gratilla for antimicrobial and haemolytic activities in vitro.
Methods:
Potentially bioactive metabolites were extracted using methanol and chloroform and tested for activity against Salmonella typhi, Escherichia coli, Shigella sonnei, Pseudomonas aeruginosa and Penicillium spp. using the agar disc diffusion method. Toxicity was determined by assaying for hemolysis against human red blood cells.
Results:
Bioactivity against the tested bacteria was observed mainly with the methanol and chloroform extracts of the gonads and gut. Higher antibacterial activity was present in the methanol extracts compared to chloroform extracts. Activity against the Penicillium spp was detected only in the methanol extracts, while the chloroform extracts showed no activity. The various extracts of the sea urchin lacked any detectable hemolytic activity against human erythrocytes.
Discussion:
These research findings suggest that marine echinoderms are a potential source of novel antimicrobial compounds.
Key words:
Tripneustes gratilla, antimicrobial activity, marine invertebrates

Abubakar LU. "Impact of genetic research on women in Africa.". In: International Conference on Muslim Women Scholars in Science & Technology Development. Tehran, IRAN; 2012.abstract-african_women__genetics.pdf
Abubakar L, Osir EO, Imbuga MO. "Properties of a blood-meal-induced midgut lectin from the tsetse fly Glossina morsitans.". 1995. Abstract

The properties of a blood-meal-induced lectin (agglutinin) from the midgut of Glossina morsitans capable of agglutinating Trypanosoma brucei were studied in vitro. The midgut homogenate from flies that had been fed twice had the highest agglutination activity, followed by that from the once-fed flies and that from the unfed insects. As compared with the bloodstream-form trypanosomes, a much lower concentration of the midgut homogenate was required for agglutination of the procyclic parasites. Furthermore, the agglutination process was specifically inhibited by D-glucosamine. Soybean trypsin inhibitor abrogated agglutination of the bloodstream-form parasites, whereas the procyclics were unaffected. The agglutination process was temperature-sensitive, with little activity being evident between 4 degrees and 15 degrees C. Similarly, heating the midguts to 60 degrees-100 degrees C led to loss of activity. When the midgut homogenate was separated by anion-exchange chromatography, the agglutination activity co-eluted with trypsin activity at approximately 50% NaCl. These results suggest a very close relationship between midgut trypsin-like enzyme and the agglutinin. Since successful agglutination of bloodstream-form trypanosomes requires protease activity, it may be that the enzyme cleaves off some surface molecules on the parasite surface, thus exposing the lectin-binding sites

Abubakar LU, Bulimo WD, Mulaa FJ, Osir EO. "Molecular characterization of a tsetse fly midgut proteolytic lectin that mediates differentiation of African trypanosomes." Insect Biochem Mol Biol. 2006;36:344-52. AbstractWebsite

Differentiation of bloodstream-form trypanosomes into procyclic (midgut) forms is an important first step in the establishment of an infection within the tsetse fly. This complex process is mediated by a wide variety of factors, including those associated with the vector itself, the trypanosomes and the bloodmeal. As part of an on-going project in our laboratory, we recently isolated and characterized a bloodmeal-induced molecule with both lectin and trypsin activities from midguts of the tsetse fly, Glossina longipennis [Osir, E.O., Abubakar, L., Imbuga, M.O., 1995. Purification and characterization of a midgut lectin-trypsin complex from the tsetse fly, Glossina longipennis. Parasitol. Res. 81, 276-281]. The protein (lectin-trypsin complex) was found to be capable of stimulating differentiation of bloodstream trypanosomes in vitro. Using polyclonal antibodies to the complex, we screened a G. fuscipes fuscipes cDNA midgut expression library and identified a putative proteolytic lectin gene. The cDNA encodes a putative mature polypeptide with 274 amino acids (designated Glossina proteolytic lectin, Gpl). The deduced amino acid sequence includes a hydrophobic signal peptide and a highly conserved N-terminal sequence motif. The typical features of serine protease trypsin family of proteins found in the sequence include the His/Asp/Ser active site triad with the conserved residues surrounding it, three pairs of cysteine residues for disulfide bridges and an aspartate residue at the specificity pocket. Expression of the gene in a bacterial expression system yielded a protein (M(r) approximately 32,500). The recombinant protein (Gpl) bound d(+) glucosamine and agglutinated bloodstream-form trypanosomes and rabbit red blood cells. In addition, the protein was found to be capable of inducing transformation of bloodstream-form trypanosomes into procyclic forms in vitro. Antibodies raised against the recombinant protein showed cross-reactivity with the alpha subunit of the lectin-trypsin complex. These results support our earlier hypothesis that this molecule is involved in the establishment of trypanosome infections in tsetse flies.

Abubakar Ali, V. K. Oduol PA. "Optimization of Handover in Mobile System by Using Dynamic Guard Channel Method ." International Journal for Innovation Education and Research. 2017;5(9):32-53.
Abubaker AS;, Abukanesha FF;, Anyango JJ;, Baruni A;, Bin-Taher AH;, Boinnet KJK;, Singh B;, Mutitu EW. "ALPHABETICAL LIST OF AUTHORS."; 1988.
Abuga KO, Amugune BK, Ndwigah SN, Kamau FN, G.N.Thoithi, Ogeto JO, Okaru AO, Nguyo JM, King’ondu OK, Mugo HN, Kibwage IO. "Drug quality control in Kenya: observations in the Drug Analysis and Research Unit (DARU) during the period 2006-2010." East Cent. Afr. J. Pharm. Sci. . 2013;16(2):33-43.
Abuga KO, Kigera ST, Wanyama M, Nandama WM, Kibwage IO. "Quality Control Results of Pharmaceuticals Analyzed in the Mission for Essential Drugs and Supplies (MEDS) Laboratory During the Period 2013-2017." East Cent. Afr. J. Pharm. Sci.. 2021;24(2):57-66. Abstract

During the 2013-2017 period, the MEDS laboratory received and processed 6853 samples. Samples were sourced from Kenya and other sub-Saharan Africa countries. The samples submitted comprised Kenyan manufactured (31.9%) and internationally manufactured products (67.9%) while nine samples were of unknown origin. Analysis was carried out according to compendial and/or in-house specifications. The non-compliance rate was 5.1% consisting of 1.2 % local and 3.8% imports. The top ten drug classes with high failure rates were antimyasthenics (50.0%), antiseptics/disinfectants (24.7%), anthelminthics (22.0%), thyroid/antithyroid drugs (20.0%), nutrient mixtures (18.5%), uricosurics (12.5%), waters (11.6%), mixed anti-infectives (11.1%), hemostatics (10.0%) and nootropics (10.0%). Full compliance was however, recorded with laxatives, antidiarrheals, antihemorrhoidals, prokinetics, antithrombotics, antithrombocytopenia agents, vasopressors, anti-arrhythmic drugs, anti-anginal drugs, disease modifying antirheumatic drugs, antimigraine drugs, vertigolytics, muscle relaxants, bisphosphonates, joint lubricants, hormones, anticholinergics, osmotic diuretics, hypophosphatemics, lubricants, minerals, amino acids/peptides, immunomodulatory agents, choleretics, antidotes, lozenges, ear drops, proteins/glycoproteins, herbal products, X-ray contrast media, vaccines, environmental monitoring, medical devices/equipment and cleaning validation swabs. A total of 23 substandard and falsified medicines devoid of active ingredients were encountered over the five-year period. The results obtained demonstrate the need to strengthen regulatory stringency in order to curb incidences of substandard and falsified medicines.

Abuga KO, Ndwigah SN, Amugune BK, Ongarora DB, Njogu PM, Okaru AO, Kibwage IO. "Quality Control Report of Drugs Analyzed in the Drug Analysis and Research Unit during the Period 2011-2015." East Cent. Afr. J. Pharm. Sci.. 2020;23(3):79-86. Abstract

During the period 2011-2015, the Drug Analysis and Research Unit (DARU) analyzed 1972 drug samples. The samples consisted of 21.5% locally manufactured and 78.2% imported products while the origin of 0.3% of products was indeterminate. Samples were subjected to compendial and/or in-house analytical specifications. The overall non-compliance rate was 4.5% comprising 2.5% local products and 2.0% imports. High failure rates were recorded for uterotonics (37.5%), hemostatics (33%), anthelmintics (17%) and anticancers (10.5%) while ophthalmic, immunomodulatory, musculoskeletal and endocrine drugs all complied with the quality acceptance criteria. Erectile dysfunction drugs, received by the laboratory for the first time, all complied with specifications. The results obtained demonstrate an improvement in the quality of samples submitted to DARU when compared to previous performance.

Abuga KO, Amugune BK, Ndwigah SN, Kamau FN, Thoithi GN, Ogeto JO, Okaru AO, Nguyo JM, King’ondu OK, Mugo HN, Kibwage IO. "Quality Performance of Drugs Analyzed in the Drug Analysis and Research Unit (DARU) during the Period 2006-2010." East Cent. Afr. J. Pharm. Sci.. 2013;16:33-43.
Abuga K, Nyamweya N, King’ondu O. "Quality of alcohol based hand sanitizers marketed in the Nairobi Metropolis." East and Central African Journal of Pharmaceutical Sciences. 2021;24(Vol. 24 No. 1 (2021)):29-37.
Abuga K, Ongarora D, Karumbi J, Olulo M, Minnaard W, Kibwage I. "Sub-Standard Pharmaceutical Services in Private Healthcare Facilities Serving Low-Income Settlements in Nairobi County, Kenya." Pharmacy. 2019;7(4):167. Abstract

Background: Quality pharmaceutical services are an integral part of primary healthcare and a key determinant of patient outcomes. The study focuses on pharmaceutical service delivery among private healthcare facilities serving informal settlements within Nairobi County, Kenya and aims at understanding the drug procurement practices, task-shifting and ethical issues associated with drug brand preference, competition and disposal of expired drugs. Methods: Forty-five private facilities comprising of hospitals, nursing homes, health centres, medical centres, clinics and pharmacies were recruited through purposive sampling. Structured electronic questionnaires were administered to 45 respondents working within the study facilities over an 8-week period.
Results: About 50% of personnel carrying out drug procurement belonged to non-pharmaceutical cadres namely; doctors, clinical officers, nurses and pharmacy assistants. Drug brand preferences among healthcare facilities and patients were mainly pegged on perceived quality and price. Unethical business competition practices were recorded, including poor professional demeanour and waiver of consultation fees veiled to undercut colleagues. Government subsidized drugs were sold at 100% profit in fifty percent of the facilities stocking them. In 44% of the facilities, the disposal of expired drugs was not in conformity to existing government regulatory guidelines. Conclusions: There is extensive task-shifting and delegation of pharmaceutical services to non-pharmaceutical cadres and poor observance of ethical guidelines in private facilities. Strict enforcement of regulations is required for optimal practices.

Abuga KO, Mwagiru PM, Thoithi GN, Nguyo JM, Ngugi JK, Kingondu OK, Mugo HN, Kibwage IO. "Quality of antiretroviral drugs analyzed in the Drug Analysis Research Unit during 2000-2003." East Cent. Afr. J. Pharm. Sc.. 2003;6:20-23.
Abuga KO, Ndwigah SN, Amugune BK, Ongarora DB, Njogu PM, Okaru AO, Kibwage IO. "Quality control report of drugs analyzed in the Drug Analysis and Research Unit during the period 2011-2015." East Cent. Afr. J. Pharm. Sci. 2020;23(3):79-86.
Abuga KO, Ndwigah SN, Amugune BK, Ongarora DB, Njogu PM, Okaru AO, Kibwage IO. "Quality control report of drugs analyzed in the drug analysis and research unit during the period 2011-2015." East and Central African Journal of Pharmaceutical Sciences. 2020;23:79-86. Abstract
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Abuga K, Ongarora D, Karumbi J, Olulo M, Minnaard W, Kibwage I. "Sub-standard Pharmaceutical Services in Private Healthcare Facilities Serving Low-Income Settlements in Nairobi County, Kenya." Pharmacy. 2019;7(4):167.
Abuga K, Nyamweya N. "Alcohol-Based Hand Sanitizers in COVID-19 Prevention: A Multidimensional Perspective." Pharmacy. 2021;9(1):64. Abstract

The global use of alcohol-based hand sanitizers (ABHS) as an important means of controlling the transmission of infectious disease has increased significantly as governments and public health agencies across the world advocated hand hygiene as a preventative measure during the COVID-19 pandemic. Although the performance of these products is most commonly defined as a function of their alcohol concentration, they are multifaceted products in which an interplay of several factors is important in determining efficacy. This paper discusses the interplay between ABHS input (formulation) factors and output (product performance) factors in the context of a multidimen-sional perspective using a novel representative paradigm. In the model, represented in the form of a three-dimensional tetrahedron, each of the faces represents inputs in the manufacturing of the ABHS product, which are the type and amount of alcohol, the inactive ingredients, the formulation and the manufacturing practices. The four corners of the tetrahedron represent the product per-formance factors which include product efficacy, sensory characteristics, usage and compliance and product safety. The multidimensional approach to the formulation and evaluation of ABHS shows that several factors contribute to the effectiveness and utility of these products. The paradigm provides a useful framework for manufacturers of ABHS and related healthcare products.

Abuga KO, Amugune BK, Ndwigah SN, Kamau FN, Thoithi GN, Ogeto JO, Okaru AO, Nguyo JM, King'ondu OK, Mugo HM, Kibwage IO. "Quality Performance of Drugs Analyzed in the Drug Analysis and Research Unit (DARU) during the Period 2006-2010." East Cent. Afr. J. Pharm. Sci.. 2013;16(2):33-43. Abstract

During the period 2006-2010, the Drug Analysis and Research Unit analyzed 583 samples. The samples comprised 50.6% local and 49.4% imported products. Samples were subjected to compendial or in-house specifications. The failure rate was 12.2% for local products and 14.2% for imports. Antibacterial products recorded the highest failure rate (21.6%) while anticancers and drugs acting on the gastrointestinal, respiratory and reproductive systems all passed in the tests performed. The failure rate for antiprotozoals, antimalarials, antifungals, anthelminthics and analgesics was 14.3%, 12.5%, 11.8%, 8.9% and 11.5%, respectively.

Abuga K, Nyamweya N, King’ondu O. "Quality of alcohol-based hand sanitizers marketed in the Nairobi metropolitan area." East Cent. Afr. J. Pharm. Sci.. 2021;24(1):29-37. Abstract

The emergence of the COVID-19 pandemic has propelled the use of alcohol-based hand sanitizers to the fore as a SARS-CoV-2 control measure. To be effective these products must comply with relevant quality parameters such as alcohol concentration, methanol limits and purity. The current study was designed to determine the quality of alcohol-based hand sanitizer products in the Nairobi metropolitan area. For this purpose, 74 commercially marketed samples were collected and subjected to analysis by gas chromatography. Only three samples (4.1%) complied with the regulatory specifications for alcohol content, methanol limits and pH. Five samples (6.8%) complied with the specification for alcohol content but did not meet methanol or pH limits. A total of 44 (59.5%) samples had methanol levels that exceeded threshold limits. Eleven samples (14.9%) were found with methanol substitution (i.e., methanol, instead of ethanol or isopropanol, was the main alcohol component). The results show that users of alcohol-based hand sanitizers are being exposed to substandard and falsified products which in addition to being non-efficacious pose harm due to unacceptable levels of toxic impurities. Regular, routine post-market surveillance is needed to prevent such products from reaching the market.

Abuga KO, Amugune BK, Ndwigah SN, Kamau FN, Thoithi GN, Ogeto JO, Okaru AO, Nguyo JM, Kingóndu OK, Mugo HN, others. "Quality Performance of Drugs Analyzed in the Drug Analysis and Research Unit (DARU) during the Period 2006-2010." East and Central African Journal of Pharmaceutical Sciences. 2013;16:33-43. Abstract
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Abungu NO, Konditi DB, Otieno AV. "Analysis of Electromagnetic Transmission through dielectric filled Apertures of Arbitrary Shape in a Thick Conducting Screen." World Scientific and Engineering Academy and Society (WSEAS). 2005. AbstractWebsite

The paper deals with an extension of the previous work appearing in a past issue of this transaction by the authors on hybrid FEM/MOM technique for analyzing transmission properties of arbitrarily shaped apertures on a thick conducting screen. In the present work, the effect of placing different dielectric material slabs in the conducting screen cavity on the electromagnetic transmission parameters is first analyzed and, then, the effect of interchanging the positions of these dielectric slabs relative to the incident field. Validation results for rectangular and cross-shaped slots are presented. Close agreement between our data and published data is observed.  Further data has been generated for rectangular, circular, diamond-shaped and cross-shaped apertures.

Abungu NO, Konditi DB, Otieno AV. "Analysis of Waveguide-backed Apertures of Arbitrary Shape in a Thick Conducting Screen." World Scientific and Engineering Academy and Society (WSEAS). 2008. AbstractWebsite

Power utility companies are required to supply customers with power within specified voltage limits. Voltage rise in networks with distributed generators therefore poses a challenge. This paper presents a coordinated network controller whose objective is to maintain an optimal voltage profile across the power network. The operations of distributed generators, on-load tap-changing transformers and reactive power sources are controlled. The controller is modelled as an optimisation problem which is solved using Particle Swarm Optimisation. The IEEE 30-bus test network is then used to verify the effectiveness of the controller. The results obtained show that this controller can greatly improve the voltage profile of a power network by varying the parameters of existing generation and voltage control equipment.

Abungu NO, Munda JL, Akumu AO. "A Case for the Revision of Power Engineering Syllabi at Kenyan Universities.". In: The IASTED( International Association of Science and Technology for Development ) International Conference, ENERGY AND POWER SYSTEMS. International Association of Science and Technology for Development (IASTED; 2005. Abstract

This paper presents a summary of the current status of Electrical Power Engineering Education at Kenyan universities, followed by a summary of the situation on the same at universities world-wide. Against a backdrop of expected changes in the Kenyan power industry, the paper discusses the industry expectations of a power systems graduate currently and in the future, making a case for the revision of the current power engineering syllabi, concluding with recommendations and strategies for making the required changes.

Abungu NO, Konditi DB, Otieno AV. "Analysis of Waveguide-backed Inhomogeneously-filled Apertures of Arbitrary Shape in a Thick Conducting Screen." World Scientific and Engineering Academy and Society (WSEAS). 2007. AbstractWebsite

Power utility companies are required to supply customers with power within specified voltage limits. Voltage rise in networks with distributed generators therefore poses a challenge. This paper presents a coordinated network controller whose objective is to maintain an optimal voltage profile across the power network. The operations of distributed generators, on-load tap-changing transformers and reactive power sources are controlled. The controller is modelled as an optimisation problem which is solved using Particle Swarm Optimisation. The IEEE 30-bus test network is then used to verify the effectiveness of the controller. The results obtained show that this controller can greatly improve the voltage profile of a power network by varying the parameters of existing generation and voltage control equipment.

Abungu NO, Konditi DB, Otieno AV. "Hybrid Method Analysis of Electromagnetic Transmission through Apertures of Arbitrary Shape in a Thick Conducting Scree.". In: World Scientific and Engineering Academy and Society (WSEAS). World Scientific and Engineering Academy and Society (WSEAS); 2004. Abstract

In this paper a hybrid numerical technique is presented, suitable for analyzing transmission properties of an arbitrarily shaped slot in a thick conducting plane. The slot is  excited by an electromagnetic source of arbitrary orientation. The analysis of the problem is based on the "generalized network formulation" for aperture problems. The problem is solved using the method of moments(MOM) and the finite element method(FEM) in a hybrid format. The finite element method is applicable to inhomogeneously filled slots of arbitrary shape while the method of moments is used for solving the electromagnetic fields in unbounded regions of the slot. The cavity region has been subdivided into tetrahedral elements resulting in triangular elements on the surfaces of the apertures.  Validation results for rectangular slots are presented. Close agreement between our data and published results is observed.  Thereafter, new data has been generated for cross-shaped, H-shaped and circular apertures.

Abungu NO, Konditi DB, Otieno AV. "Analysis of Waveguide-backed Apertures of Arbitrary Shape in a Thick Conducting Screen.". In: 1st JKUAT Scientific, Technological and Industrialization Conference. The JKUAT Scientific, Technological and Industrialization Conference 2006; 2006. Abstract

Power utility companies are required to supply customers with power within specified voltage limits. Voltage rise in networks with distributed generators therefore poses a challenge. This paper presents a coordinated network controller whose objective is to maintain an optimal voltage profile across the power network. The operations of distributed generators, on-load tap-changing transformers and reactive power sources are controlled. The controller is modelled as an optimisation problem which is solved using Particle Swarm Optimisation. The IEEE 30-bus test network is then used to verify the effectiveness of the controller. The results obtained show that this controller can greatly improve the voltage profile of a power network by varying the parameters of existing generation and voltage control equipment.

Abungu NO, Konditi DB, Otieno AV. "A Hybrid Finite Element/Moment Method for Solving Electromagnetic Radiation Problem of Arbitrarily-Shaped Apertures in a Thick Conducting Screen.". In: The KSEEE (Kenya Society of Electrical and Electronics Engineers ) Conference. The Kenya Society of Electrical and Electronics Engineers (KSEEE); 2004. Abstract

In this paper a hybrid numerical technique is presented, suitable for analyzing transmission properties of an arbitrarily shaped slot in a thick conducting plane. The slot is  excited by an electromagnetic source of arbitrary orientation. The analysis of the problem is based on the "generalized network formulation" for aperture problems. The problem is solved using the method of moments(MOM) and the finite element method(FEM) in a hybrid format. The finite element method is applicable to inhomogeneously filled slots of arbitrary shape while the method of moments is used for solving the electromagnetic fields in unbounded regions of the slot. The cavity region has been subdivided into tetrahedral elements resulting in triangular elements on the surfaces of the apertures.  Validation results for rectangular slots are presented. Close agreement between our data and published results is observed.  Thereafter, new data has been generated for cross-shaped, H-shaped and circular apertures.

Abuom TO;, Mogoa EG;, Gitonga P;, Ngatia TA;, Maingi AN. "Sebaceous Gland Adenocarcinoma In A Cow.".; 2006.
Abuom TO;, Mogoa EG;, Gitonga P;, Ngatia TA;, Maingi AN. "Sebaceous Gland Adenocarcinoma In A Cow.".; 2006.
Abuom TO, Gitonga PN, Kirui GK, Kitaa JMA, Kyallo V, Mande JD, Ndurumo SM, Tsigadi SA. "Radiographic findings of fractures and their outcomes at the small animal clinic of the University of Nairobi.". In: Presented at Annual Scientific conference of Kenya Veterinary Association. Nairobi, Kenya; 2005.
ABUOM DROKUMUTEQUIERO. "Abuom T.O, Mbuthia P.G., Sura A.S., Ndurumo S.M., Gitonga P.N.,Subcutaneous liposarcoma in a cat and Wasike R.P.1.". In: Faculty of Veterinary Medicine Biennial Scientific Conference and exhibition. September 2006. ELSEVIER; 2006. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
ABUOM DROKUMUTEQUIERO. "Tsuma, V. T., Mbai, K., Gitonga, P. N., Abuom, T. O., Ndurumo, S. M.,Bwanga, C. O. (2006). Fertility of zero-grazed dairy cattle following hormone treatment and fixed-time artificial insemination.". In: KVA conference 2006,Mombasa. ELSEVIER; 2006. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
ABUOM DROKUMUTEQUIERO. "Abuom T.O., Mande J.D., (2006) Transmissible Venereal Tumor with Subcutaneous and Bone Metastasis in a Dog.". In: KVA conference 2005 Nairobi. ELSEVIER; 2006. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
Abuom TO;, Mogoa EG;, Gitonga P;, Ngatia TA;, Maingi AN. "Sebaceous Gland Adenocarcinoma In A Cow.".; 2006.
Abuom TO, Kirui G, Tsigadi SA, Gitonga PN, Ndurumo SM, Sura A, Kitaa JMA. "A preliminary retrospective study on tumours affecting dogs in Kenya.". In: Presented at Annual Scientific conference of Kenya Veterinary Association. Mombasa, Kenya; 2006.
Abuom TO;, Mbuthia PG;, Sura AS;, Gitonga PN;, Ndurumo SM. "Subcutaneous liposarcoma in a cat and Wasike R.P.1.".; 2006.
ABUOM DROKUMUTEQUIERO. "Abuom TO, Gitonga P, Kirui G, Kitaa JMA, Kyallo V, Mande JD, Ndurumo S and Tsigadi S. Radiographic findings of fractures and their outcomes at the Small Animal Clinic of University of Nairobi, Kenya.". In: KVA conference 2005 Nairobi. ELSEVIER; 2005. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
ABUOM DROKUMUTEQUIERO. "Ndurumo M. S., Mande J.D., Kihurani D., and Abuom T.O. Antidrool cheiloplasty; Plastic Surgery of the Canine Lip. Poster presentation.". In: KVA conference 2006,Mombasa. ELSEVIER; 2006. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
ABUOM DROKUMUTEQUIERO. "Tsigadi S.A., Abuom T.O. and Mbugua S. (2006). Hypospadia in a dog.". In: KVA conference 2006.Mombasa. ELSEVIER; 2006. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
Abuom TO;, Mogoa EG;, Gitonga P;, Ngatia TA;, Maingi AN. "Sebaceous Gland Adenocarcinoma In A Cow.".; 2006.
Abuom TO;, Mbuthia PG;, Sura AS;, Gitonga PN;, Ndurumo SM. "Subcutaneous liposarcoma in a cat and Wasike R.P.1.".; 2006.
ABUOM DROKUMUTEQUIERO. "Abuom TO, Wabacha JK, Karanja DN and Kuria JN. (2004). Disseminated intravascular coagulopathy secondary to Klebsiella mastitis in a bovine.". In: Faculty of Veterinary Medicine Biennial Scientific Conference November 2004, Nairobi. ELSEVIER; 2004. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.
ABUOM DROKUMUTEQUIERO. "Abuom T.O., Ngatia T.A., Mogoa E.G., Maina A.N., Ndurumo S.M. and Tsigadi S.A.. Trichoepithelioma in a cow.". In: Faculty of Veterinary Medicine Biennial Scientific Conference and exhibition. September 2006. ELSEVIER; 2006. Abstract
Hydro-distilled volatile oils from the leaves of Ocimum gratissimum L. (Lamiaceae) from Meru district in Eastern Kenya were analysed by gas chromatography-mass spectrometry (GC-MS) and also evaluated for antimicrobial activity. The oil was dominated by monoterpens which accounted for 92.48%. This monoterpene fraction was characterized by a high percentage of eugenol (68.8%). The other major monoterpenes were methyl eugenol (13.21%), cis-ocimene (7.47%), trans-ocimene (0.94%), β-pinene (1.10%) and camphor (0.95%). The sesquiterpenes present in fairly good amounts were germacrene D (4.25%) and trans-caryophyllene (1.69%). The minor sesquiterpenes were α-farnesene (0.85%) and β-bisabolene (0.74%). The antimicrobial activities of the essential oils were evaluated against both Gram positive (Staphylococcus aureus, Bacillus spp.) and Gram negative (Escherichia coli, Pseudomonas aeruginosae, Salmonella typhi, Klebisiella pneumoniae, Proteus mirabilis) bacteria and a pathogenic fungus Candida albicans. The oil had pronounced antibacterial and antifungal activities on all the microbes.

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