Faculty of Science & Technology (FST): Recent submissions
Now showing items 3861-3880 of 4284
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Fuel value of Refined vernonia galamensis seed oil"
(Department of Chemistry, 1998) -
Factors Affecting Particle Retention in Thermal Field-Flow Fractionation
(Department of Chemistry, 2002)In this paper, we report a range of factors which affect the retention of colloidal particles in thermal field-flow fractionation (ThFFF). These results are observed among different sizes of polystyrene (PS) latex particles ... -
Some aspects of frequency and stability wind roses in a tropical region
(1980)The frequency wind roses and stability wind roses based on meteorological data at Nairobi International Airport are calculated. The stability is estimated using a Pasquill-Gifford Scheme. The results show that in the tropics ... -
Thermal Field-Flow Fractionation for Particle Analysis: Opportunities and Challenges
(Department of Chemistry, 2002) -
Magnitude and Direction of Thermal Diffusion of Colloidal Particles Measured by Thermal Field-Flow Fractionation
(Department of Chemistry, 2003-10)In this paper we provide experimental evidence showing that various types of submicrometer-sized particles (latexes, inorganic, and metallic), suspended in either aqueous or nonaqueous carrier liquids to which a temperature ... -
Retention Behavior of Metal Particle Dispersions in Aqueous and Nonaqueous Carriers in Thermal Field-Flow Fractionation
(Department of Chemistry, 2003-01)Until quite recently, theories on thermophoresis of particles predicted very low thermophoretic velocities of metal particles in liquids. This prediction was based on the understanding that the very high thermal conductivities ... -
Removal of Cr(III) from aqueous solutions using a micaceous poly–mineral from Kenya
(Department of Chemistry, 2003)Adsorption of Cr(III) ions from aqueous solutions using a micaceous polymineral (MPM) from Kenya was studied using batch experiments as function of contact time, adsorbent dosage, Cr(III) concentration, pH and temperature. ... -
Benson Munyali Wamalwa; Makiko Sakka; Paul Mwanza Shiundu; Kunio Ohmiya; Tetsuya Kimura; and Kazuo Sakka,
(Department of Chemistry, 2006) -
Soil moisture and maize-bean yields under different management in a six years old hedged Agroforestry system in Semi-Arid Laikipia, Kenya, for two contrasting seasons
(2007)Hedged agroforestry (AF) demonstration plots with maize/bean intercrops were studied at Matanya in Laikipia district, Kenya, between 1991 and 1995 inclusive, to understand crop yield behaviour due to selected soil moisture ... -
Patrick M. Shem, Paul M. Shiundu, Nicholas K. Gikonyo, Ahmed Hasssanali and Rajinder K. Saini
(Department of Chemistry, 1988) -
Phenotypic nutrient up-take differences in an alley cropping system in Semi-arid Machakos, Kenya
(Department of Geography, University of Nairobi, 2001)Alley cropping of Cassia siamea and maize was studied in semi-arid Kenya for soil fertility improvement. Katumani composite maize was planted except in the short rains of 1988 (SR88) when a hybrid variety was sown. Therefore ... -
Contribution to the Heat Budget in Nairobi Metro-Area by the Anthropogenic Heat Component
(2008)This study quantifies the ejected waste heat from artificial supplies comprising road transport and industrial, commercial, domestic and metabolic heating activities which may enhance the urban temperatures in Nairobi metro ... -
Wilson G. Kamundia, Paul M. Shiundu, and John M. Onyari
(Department of Chemistry, 1988) -
Cloud cover estimation over selected locations in East Africa using satellite derived reflectivity data
(2008)The study aimed at improving the estimation of cloudiness over East Africa through establishment of the relationship between observed cloud cover and the satellite derived reflectivity. Two types of data were used, ... -
Oxidation of Ascorbic acid on a polyaniline derivatized electrode
(Department of Chemistry, 1993) -
Potential capability of the East African seismic stations
(1998)It is well known that Africa is poorly covered with seismic stations and relatively few readings reach the international data bases. In September 1993 a workshop was held in Dar es Salaam, where all available seismograms ... -
Quantitative aspects of charge transfer in polyaniline during it
(Department of Chemistry, 1994) -
Suppression of polyaniline electrochemical degradation in salt solutions.
(Department of Chemistry, 1994) -
Crustal structure on the northeastern flank of the Kenya rift.
(1994)The KRISP flank line E converges with the Kenya rift at an angle of about 45° and is approximately parallel to the older Anza graben to the north. The depth to the basement is almost zero along the entire onshore part of ...
