Publications

Found 66 results

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Submitted
N PROFKAMAUGEOFREY. "Accumulation of DDT residues in aquarium fish, sediment, plant and water," Accepted, J. Environment International.". In: Submitted to Journal of Electrochimica Acta. Survey Review; Submitted. Abstract
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N PROFKAMAUGEOFREY. "The antihypertensive Effect of an extract from the Bark of Podocarpus Sp",.". In: Submitted, East Africa Medical Journal. Survey Review; Submitted. Abstract
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N PROFKAMAUGEOFREY. "Determination of Trace Elements in Medicinal Plants and Herbal Medicines. J. Phytochemistry, Submitted.". In: Electroanal. Chem., 17, 1984, 265. Survey Review; Submitted. Abstract
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N PROFKAMAUGEOFREY. "Electrocatalytic decomposition of organohalides in microemulsion,".". In: Submitted to Journal of Electrochimica Acta. Survey Review; Submitted. Abstract
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N PROFKAMAUGEOFREY. "The Hypoglycoemic Effect of an Extract from the Bark of Podocarpus Sp", Submitted,.". In: East Africa Medical Journal. Survey Review; Submitted. Abstract
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2013
Wawire MC, Jouvenot D, Loiseau F, Baudin P, Liatard S, Njenga L, Kamau GN, Casida ME. "Density-functional Study Of Luminescence In Polypyridine Ruthenium Complexes." Journal of Photochemistry and Photobiology A: Chemistry. 2013. Abstract

A density-functional theory (DFT) study of five ruthenium complexes has been carried out with the goal of gaining deeper insight into factors governing luminescence lifetimes. The five compounds are [Ru(bpy)3]2+ (1), [Ru(L1)2]2+ (2), [Ru(tpy)2]2+ (3), [Ru(L1)(tpy)]2+ (4), and [Ru(L2)2]2+ (5), where bpy = 2,2′-bipyridine, tpy = 2,2′;6′,2″-terpyridine, L1 = 1,1′-[2,6-pyridinediylbis(methylene)]bis[3-methylimidazolium] hexafluorophosphate and L2 = 1,1′-[2,6-pyridinediylbis(methylene)]bis[3-methylbenziimidazolium]. Experimental work, including the synthesis and photophysical properties of 5 is also reported in the context of this study. Gas phase geometries optimized using X-ray crystallography geometries as start geometries were found to be close to the start geometries. Gas phase absorption spectra calculated using time-dependent DFT were found to be in good agreement with spectra measured in solution. A partial density of states (PDOS) analysis of the molecular orbitals shows that it is possible to recover a ligand field theory (LFT)-like picture. On the basis of this PDOS-derived LFT-like picture we propose two orbital-based luminescence indices, both motivated by the idea that luminescence quenching results from a low 3MLCT → 3MC barrier. The first luminescence index is ΔE , the difference between the View the MathML sourceeg* and lowest energy π* PDOS bands. The second luminescence index is d × π, the product of the amount of π character in the t2g band with the amount of ruthenium d character in the 1π* band. These luminescence measures are intended as qualitative rather than quantitative predictors. Low values of ΔE and high values of d × π are shown to correlate with lack of luminescence for the five compounds studied in this paper, while high values of ΔE and low values of d × π correlate well with luminescence.

2012
2011
2010
2009
2005
N PROFKAMAUGEOFREY. "Variation of palm oil with physico-chemical properties with temperature.". In: ELAEIS (The International Journal of Oil Palm Research and Development, Malaysia). Re-Submitted. THESES. Survey Review; 2005. Abstract
Towers are typical structures that can be found in many urban and rural landscapes the world over. From their basic design, they are usually exposed to severe environmental loads. It is therefore prudent to carry out periodic maintenance that includes checking that they are correctly aligned. This paper describes a method that was used for the re-alignment of a guyed tower in Limuru, Kenya. Angular and distance observations, made from two observation points detected a vertical misalignment that was larger than the acceptable tolerance of l/400. An iterative re-alignment procedure was then applied, resulting in an acceptable final misalignment of 1 / 520.
2004
N PROFKAMAUGEOFREY. "Selective control and rate enhancement of reactions involving catalytic reduction of organohalides and reduced form of myoglobin in microemulsions, Pure Appl.". In: Chem., Vol. 76, No. 4, pp. 815-828, 2004. Survey Review; 2004. Abstract
Towers are typical structures that can be found in many urban and rural landscapes the world over. From their basic design, they are usually exposed to severe environmental loads. It is therefore prudent to carry out periodic maintenance that includes checking that they are correctly aligned. This paper describes a method that was used for the re-alignment of a guyed tower in Limuru, Kenya. Angular and distance observations, made from two observation points detected a vertical misalignment that was larger than the acceptable tolerance of l/400. An iterative re-alignment procedure was then applied, resulting in an acceptable final misalignment of 1 / 520.
2003
N PROFKAMAUGEOFREY. "Factors affecting yield of essential oil from Clevenger distillation of chamomile flowers",.". In: Joseph M. Mwaniki and Geoffrey N. Kamau, International Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2003. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
N PROFKAMAUGEOFREY. "Hypoglycemic and Hyperglycemic effects of Momordica charantia Fruit extracts,.". In: Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2003. Abstract
Towers are typical structures that can be found in many urban and rural landscapes the world over. From their basic design, they are usually exposed to severe environmental loads. It is therefore prudent to carry out periodic maintenance that includes checking that they are correctly aligned. This paper describes a method that was used for the re-alignment of a guyed tower in Limuru, Kenya. Angular and distance observations, made from two observation points detected a vertical misalignment that was larger than the acceptable tolerance of l/400. An iterative re-alignment procedure was then applied, resulting in an acceptable final misalignment of 1 / 520.
N PROFKAMAUGEOFREY. "Mineralogy, Chemistry and Micromorphology of Ashes obtained from Sugar Cane Bagasse and Rice Husks from Kenya,.". In: Journal of BioChemiPhysics, Vol. 11&13, No. 3, December 2003. Survey Review; 2003. Abstract
Towers are typical structures that can be found in many urban and rural landscapes the world over. From their basic design, they are usually exposed to severe environmental loads. It is therefore prudent to carry out periodic maintenance that includes checking that they are correctly aligned. This paper describes a method that was used for the re-alignment of a guyed tower in Limuru, Kenya. Angular and distance observations, made from two observation points detected a vertical misalignment that was larger than the acceptable tolerance of l/400. An iterative re-alignment procedure was then applied, resulting in an acceptable final misalignment of 1 / 520.
N PROFKAMAUGEOFREY. "Myoglobin Coadsorbed on Electrodes, Langmuir, Vol. 19, No. 17, 2003 6981.". In: Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2003. Abstract
Towers are typical structures that can be found in many urban and rural landscapes the world over. From their basic design, they are usually exposed to severe environmental loads. It is therefore prudent to carry out periodic maintenance that includes checking that they are correctly aligned. This paper describes a method that was used for the re-alignment of a guyed tower in Limuru, Kenya. Angular and distance observations, made from two observation points detected a vertical misalignment that was larger than the acceptable tolerance of l/400. An iterative re-alignment procedure was then applied, resulting in an acceptable final misalignment of 1 / 520.
N PROFKAMAUGEOFREY. "Spectroscopic Characterization and Distribution of tris(2,2.". In: Journal of BioChemiPhysics, Vol. 11&12, No.3, 2003. Survey Review; 2003. Abstract
Towers are typical structures that can be found in many urban and rural landscapes the world over. From their basic design, they are usually exposed to severe environmental loads. It is therefore prudent to carry out periodic maintenance that includes checking that they are correctly aligned. This paper describes a method that was used for the re-alignment of a guyed tower in Limuru, Kenya. Angular and distance observations, made from two observation points detected a vertical misalignment that was larger than the acceptable tolerance of l/400. An iterative re-alignment procedure was then applied, resulting in an acceptable final misalignment of 1 / 520.
2002
imsop SJ, Kamau GN, Karuu SP. Analysis of Heavy Metal Pollutants along Nairobi River..; 2002.
N PROFKAMAUGEOFREY. "Adsorption and detection of some phenolic compounds by rice husk ash of Kenyan origin", J. Environ. Monit., 4, 1-8.". In: Joseph M. Mwaniki and Geoffrey N. Kamau, International Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2002. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
2001
N PROFKAMAUGEOFREY. "Potentials of using waste burnt clay as a pozzolanic material in Kenya", Discov. Innov., 13, 114-118.". In: Joseph M. Mwaniki and Geoffrey N. Kamau, International Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2001. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
N PROFKAMAUGEOFREY. "Status of Organochlorine (DDT) pollutants and steps toward electrocatalytic reductions", Pure Appl. Chem., Vol. 73, 1907-1916.". In: Joseph M. Mwaniki and Geoffrey N. Kamau, International Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2001. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
2000
N PROFKAMAUGEOFREY. "Assessment of cottage-derived heavy metal pollution of soils.". In: African Journal of Science and Technology, vol. 1, No. 2, 52-62 (2000). Survey Review; 2000. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
N PROFKAMAUGEOFREY. "Potential antitermite compounds from Juniperus Procera Extracts, J. Chemosphere, 41, 1071.". In: Joseph M. Mwaniki and Geoffrey N. Kamau, International Journal of BioChemiPhysics, Vol.11&12(Nos.1&2) 2003. Survey Review; 2000. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
1999
N PROFKAMAUGEOFREY. "Assembly of electroactive ordered multilayer films of cobalt pthalocyanine tetrasulfonate and polycations, J.". In: colloid and Interface Science, 212, 570-575, 1999. Survey Review; 1999. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
N PROFKAMAUGEOFREY. "Influence of surfactant-based microheterogeneous fluids on aggregation of copper phthalocyanine tetrasulfonate", J.". In: porphyrins phthalocyanine 3, 188-195, 1999. Survey Review; 1999. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
N PROFKAMAUGEOFREY. "Variation of Plant DDT uptake with age and soil type ...", J.". In: Environment International, 25 (4), (1999). Survey Review; 1999. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
1998
Kinyua AM, MANGALA MJ, GATEBE CK, Kamau GN, Kinyua AM, Kwach R, Mugera WG, Njau LN. Suspended particulate matter in Nairobi and the impact on health.; 1998.
N PROFKAMAUGEOFREY. "Determination of fluoride in different toothpaste formulations", Kenya J.". In: Sciences series A., 11 (1), 133. Survey Review; 1998. Abstract
Ground Flowers of Matricaria Recutita (German Chamomile) Banat Variety grown in Kenya, were subjected to Clevenger distillation under varying temperature, distillation, pressure conditions and the yields assessed. An inert solvent being present in the collecting column of the Clevenger apparatus increases the yield of the oil by reducing dispersion of the blue oil; its presence however, in the distillation flask inhibits the production of the essential oil. Distillation under reduced pressure leads to a decrease in the yield of the oil produced. A break in distillation time especially during the first three hours of distillation also leads to a decrease in the yield of the oil produced.
N PROFKAMAUGEOFREY. "Extraction and spectroscopic Study of avocado oil, J. Biochemiphysics, 6&7, 36.". In: Sciences series A., 11 (1), 133. Survey Review; 1998. Abstract
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N PROFKAMAUGEOFREY, M PROFSHIUNDUPAUL, M PROFSHIUNDUPAUL. "Fuel value of Refined vernonia galamensis seed oil".". In: J. Biochemphysics, 6&7, 33. Survey Review; 1998. Abstract
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N PROFKAMAUGEOFREY. "Voltammetric studies of reactions of immidazolidine...." , J. Electroanalysis, 10(11), 747.". In: Sciences series A., 11 (1), 133. Survey Review; 1998. Abstract
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1996
N PROFKAMAUGEOFREY. "Optimization of parameters for study of heavy metals in biological samples, J. Biochemiphysics, 5, 19.". In: J. Biochemphysics, 6&7, 33. Survey Review; 1996. Abstract
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N PROFKAMAUGEOFREY. "Spectroscopic Studies and Physical Chemical Properties of Unsaponifiable Matter of Avocado oil,".". In: Proceedings, Biochemical Society, Nairobi, Sept. 1996. Survey Review; 1996. Abstract
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1995
N PROFKAMAUGEOFREY. "Analysis of Mercury in Soils around Lake Naivasha," J. Biochemiphysics, 4 (1995) 27.". In: Proceedings, Biochemical Society, Nairobi, Sept. 1996. Survey Review; 1995. Abstract
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1994
Kamau GN, Saccucci TM, Gounili G, Nassar A-EF, Rusling JF. "Films formed by oxidation of ferrocene at platinum electrodes.". 1994.Website
N PROFKAMAUGEOFREY. "Effect of Coagulation aspects and colour removal from textile wastes", J. Biochemiphysics, 3 (1994) 41.". In: Proceedings, Biochemical Society, Nairobi, Sept. 1996. Survey Review; 1994. Abstract
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N PROFKAMAUGEOFREY. "Indirect spectroscopic determination of phosphate",J. Biochemiphysics, 3 (1994) 37.". In: Proceedings, Biochemical Society, Nairobi, Sept. 1996. Survey Review; 1994. Abstract
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N PROFKAMAUGEOFREY. "Resolution of Ascorbic-Catechol-amine and Indolakaloid mixtures by pulse voltammetry at highly polished glassy carbon", Electroanalysis, 6, 445.". In: Proceedings, Biochemical Society, Nairobi, Sept. 1996. Survey Review; 1994. Abstract
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1993
N PROFKAMAUGEOFREY. "Cold solvent extraction and physico-chemical study of Avocado oil," J. Biochemiphysics, 2, 75.". In: Submitted, East Africa Medical Journal. Survey Review; 1993. Abstract
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N PROFKAMAUGEOFREY. "Development of Rice Husk Ash based alternative cements in Kenya", Proceedings:.". In: Inaugral conference of the Kenya Chemical Society, Nairobi, June 1993. Survey Review; 1993. Abstract
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N PROFKAMAUGEOFREY. "Mercury levels in Lake Naivasha,".". In: Proceedings of the KMRI/KETRI annual Medical Scientific Conference, Nairobi, Kenya 1993. Survey Review; 1993. Abstract
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N PROFKAMAUGEOFREY. "Rice Husk Ash and its application as a cement replacement material in Kenya," J. Biochemiphysics, 2, 132.". In: Proceedings, Biochemical Society, Nairobi, Sept. 1996. Survey Review; 1993. Abstract
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N PROFKAMAUGEOFREY. "Use of roadside soils and vegetation in monitoring motor vehicle lead pollution," Proceedings:.". In: Inaugral Conference of the Kenya Chemical Society, Nairobi, June 1993. Survey Review; 1993. Abstract
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1992
N PROFKAMAUGEOFREY. "Rate enhancemnt and control in electrochemical catalysis using a bicontinuous microemulsion", Langmuir, 8, 1992, 1042.". In: Proceedings of the KMRI/KETRI annual Medical Scientific Conference, Nairobi, Kenya 1993. Survey Review; 1992. Abstract
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1991
N PROFKAMAUGEOFREY. "Levels of Mercury in water, fish, sediments and blood samples from different regions of Kenya", J. Biochemiphysics, 1, 9.". In: Proceedings of the KMRI/KETRI annual Medical Scientific Conference, Nairobi, Kenya 1993. Survey Review; 1991. Abstract
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N PROFKAMAUGEOFREY. "Protocol for International Co-operative Education in Developing Countries", proceedings, seventh World Conference on Co-op Education, Hong Kong, 26-30 Aug.". In: Proceedings of the KMRI/KETRI annual Medical Scientific Conference, Nairobi, Kenya 1993. Survey Review; 1991. Abstract
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1990
N PROFKAMAUGEOFREY. "Microelectrode voltammetry of TCNQ in aprotic solvent at low concentrations of non reducing salts", Electroanal. Chem., 292, 1990, 187.". In: Proceedings of the KMRI/KETRI annual Medical Scientific Conference, Nairobi, Kenya 1993. Survey Review; 1990. Abstract
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1988
1987
1986
1985
N PROFKAMAUGEOFREY. "Electrocatalytic Reactions in organized assemblies part II" J.". In: Electroanal. Chem., 187, 355. Survey Review; 1985. Abstract
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1984

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