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O. DRDULOSIMEON. "P.M Syagga, B Waswa-Sabuni, G.N Kamau and S.O Dulo (2003). Rice Husk Ash Cement - An Alternative Pozzolana Cement for Kenyan Building Industry.". In: Journal of Civil Engineering, JKUAT Vol. 8, March 2003, pg 13-26. UNDPCap-Net, March 2009.; 2003.
O. DRDULOSIMEON. "P.M Syagga, B Waswa-Sabuni, G.N Kamau and S.O Dulo (2003). Utilisation of Agro Based Pozzolanas in the Building Industry in Kenya.". In: Proceedings of the International Civil Engineering Conference on Sustainable Development in the 21st Century, 12th . HABRI,UoN; 2003.
O. DRDULOSIMEON. "S.O Dulo (2003). Potential for the Privatisation of Solid Waste Management in Kisumu City.". In: Proceedings of the International Civil Engineering Conference on Sustainable Development in the 21st Century, 12th . HABRI,UoN; 2003.
MWANGI MRMUREITHISTEPHEN. "Spatial structure of the population of Fat Sand Rat Psammomys obesus in the vicinity of Sede Boqer. Marina Butylkina, Lilit Mirzoyan and Stephen M. Mureithi. Project Research Paper in Sixth International Course on Conservation of Biodiversity in Desert Ec.". In: MASHAV Special Project Research Paper. MASHAV; 2003. Abstract
Cities around the world are currently facing considerable pressure to cope with infrastructure provision amidst rapid urban development and economic growth. Kenya is also facing an increasing growth of informal settlements in her urban centres. As rapid urbanization takes its toll, so has the development and growth of slums. More than 34% of Kenya‟s total population lives in urban areas and of this, more than 71% is confined in informal settlements (UN-Habitat, 2009). This paper presents the result of study to assess the effects of the change in land use in two sub-catchments, in an urban area close to the Nairobi Central Business District (NCBD). The paper compares the change in land use of two regions in Nairobi, Kenya that are slowly changing due to the fast growing population and economy, on urban runoff.
SOLOMON DRDERESE. "Bioactive Compounds from Some Kenyan Ethno-medicinal Plants: Myrsinaceae, Polygonaceae and Psiadia punctulata.". In: Chemical Sciences Journal Vol. 2012: CSJ-56. Elsevier; 2002. Abstract

There are several described medicinal plants in Kenya from a flora of approximately 10,000 members. Strong cross-medical information from the 42 ethnic groups points to the high potential of some of these species. The Myrsinaceae are well established ethno-anthelmintics and anti-bacterials. They are harbingers of long alkyl side chain benzoquinones which clearly have a protective function from their histochemical disposition. The main benzoquinone in the sub-family Myrsinodae is embelin while for the Maesodae it is maesaquinone together with its 5-acetyl derivative; the distribution of these benzoquinones by their alkyl side chain length or the presence/absence of a 6-methyl group is in accord with morphological sub-family de-limitation. The benzoquinones showed anti-feedant, anti-microbial, phytotoxic, acaricidal, insecticidal and nematicidal activity. Many other benzoquinones of medium and minor concentration were also isolated and characterised. Some plants belonging to the Polygonaceae which are widely used as ethno-anthelmintics have been studied. The common anthelmintic anthraquinones were obtained from all five Rumex species while the naphthalenic acetogenin derivative, nepodin was more selectively distributed. The leaf of Polygonum senegalense is up to 17% surface exudate; about thirteen non polar flavonoid derivatives (chalcones, dihydrochalcones, flavanones and a flavone) have been isolated from it. From the internal aerial tissues of this plant, the major flavonoids were common flavonoids, quercetin, kaempferol, luteolin and their glycosides. The only unique compound isolated from this plant was 2′-glucosyl-6′-hydroxy-4′-methoxydihydrochalcone whose aglycone, uvangolatin is part of the exudate mixture. Other leaf exudate plants studied include the stomach-ache medicine, Psiadia punctulata (Compositae) from which novel methylated flavonoids, kaurene and trachyloban diterpenes have been found.

NDUKU DRWAUSIAGNES. "Developing Intranet for linkage to the Internet.". In: VLIRIUC-UoN International Conference, 2002. ARCHWAY Technology Management Ltd; 2002. Abstract
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O. DRDULOSIMEON. "P.M Syagga, B. Waswa-Sabuni, G.N Kamau and S.O Dulo (2001). Potential for the Use of Rice Husk Ash as a Pozzolana in the Building Industry in Kenya.". In: 4. Discovery and Innovations Vol. 13 No 3/4.Dec 2001, ISSN: 1015-079X. HABRI,UoN; 2001.
NDUTA DRWACHIRA-MBUIDAMARIS. "Sorption and Detection of Phenolic Compounds by Rice Husk Ash from Mwea, Kenya.". In: JOURNAL OF ENVIRONMENTAL CHEMISTR. MBUI DAMARIS; 2001. Abstract
This is a generalization after my work on the projective space of dimension 4 to n.
O. DRDULOSIMEON. "Draft Specifications for the Production of Rice Husk Ash as a Pozzolana in Kenya. A report presented to the Kenya Bureau of Standards.". In: Journal of Civil Engineering, JKUAT Vol. 8, March 2003, pg 13-26. HABRI,UoN; 1999.
UWESO DRABUBAKARLAILA. "Osir E. O., Abubakar L.U., Abakar, M. .". In: 25th Meeting of the International Scientific Council for Trypanosomiasis Research & Control (ISCTRC) Mombasa, KENYA. ISCTRC; 1999. Abstract
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
O. DRDULOSIMEON. "S.O Dulo (1999). Solid Waste Management Privatisation in Nairobi City.". In: Proceedings of the 25th WEDC Conference on Integrated Development for Water Supply and Sanitation. HABRI,UoN; 1999.
O. DRDULOSIMEON. "S.O Dulo (1992). Use of Cement Stabilised Soil blocks.". In: Proceedings of the Annual Seminar for the Kenya Society of Agricultural Engineers, held at the Jomo Kenyatta University College of Agriculture and Technology, Juja, Kiambu. HABRI,UoN; 1992.
O. DRDULOSIMEON. "S.O Dulo and J. Malombe (1991). Infrastructure of Housing Schemes in Nyeri Municipality.". In: Proceedings of the United Nations Training Program in Housing at the University of Nairobi. Pg 325-335. HABRI,UoN; 1991.
O. DRDULOSIMEON. "S.O Dulo (1990). "Sanitation a Priority".". In: Proceedings of the annual seminar of the Kenya Society of Agricultural Engineers. University of Nairobi. HABRI,UoN; 1990.

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