Faculty of Science & Technology (FST): Recent submissions
Now showing items 3281-3300 of 4284
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The major environmental factors that influence rapid disappearance of pesticides from tropical soils in Kenya
(University of NairobiDepartment of Chemistry, College of Biological and Physical Sciences, University of Nairobi, 2001)Results of field and laboratory studies on adsorption/desorption, leaching, dissipation, bound residue formation and metabolism of DDT, DDE, lindane, parathion, malathion, dimethoate and carbofuran in tropical soils in ... -
Kinetics of Copper Desorption from Regenerated Spent Bleaching Earth
(Department of Chemistry, Kenyatta University,Department of Chemistry, University of Nairobi,, 2009)Recent studies have shown that spent bleaching earth (SBE), a clayey waste from edible oil refineries, could be used to remove Cu from aqueous solutions. This could result in copper-laden material whose continual disposal ... -
Determination of Organochlorine Pesticide Residues in Soil and Water from River Nyando Drainage System Within Lake Victoria Basin, Kenya
(University of NairobiFaculty of Science, Department of Chemistry, 2004-02) -
Some aspects of rain water Chemistry Programme in Kenya
(Department of Metereology, 1989) -
Air pollution problem in African cities
(Department of Metereology, 1990) -
Dissipation behavior of malathion and dimethoate residues from the soil and their uptake by garden pea (Pisum sativum)
(University of NairobiCollege of Biological and Physical Sciences, 2000)The dissipation of malathion and dimethoate from soil and their uptake by garden peas was studied in a greenhouse at 10-26°C. Twenty-one-day-old seedlings were treated with 50% EC malathion or 40% EC dimethoate, labelled ... -
Temperature dependence of the Hg 6s6p(3P0→3P1) transition induced by nitrogen
(Department of Chemistry, University of Nairobi, 1987)The rate coefficient of the process Hg 6s6p(3P0→3P1) induced by nitrogen collisions has been measured over the range 285 to 340 K. The temperature variation closely matches that of the concentration of N2(v = 1). The results ... -
Plectranthus : A review of ethnobotanical uses
(School of Biological Sciences, 2006)Plectranthus is a large and widespread genus with a diversity of ethnobotanical uses. The genus is plagued with numerous nomenclatural disharmonies that make it difficult to collate accurate data on the uses. The aim of ... -
Spectrophotometric determination of palladium with sulfochlorophenolazorhodanine by flow injection
(Department of Chemistry, University of Nairobi, 1990-03)Sulfochlorophenolazorhodanine (as its sodium salt) has been used in the automated development of a sensitive flow-injection procedure for the spectrophotometric determination of palladium. The resulting method has high ... -
Termination of leech swimming activity by a previously identified swim trigger neuron
(University of NairobiCollege of Biological and Physical Sciences, 1995)Cell Tr2 is a neuron in the subesophageal ganglion of the leech that can trigger swim episodes. In this report, we describe the ability of Tr2 to terminate ongoing swim episodes as well as to trigger swimming. Stimulation ... -
A tree/crop interface orientation experiment with a Grevillea Robusta hedgerow and maize
(School of Biological Sciences, 1994)Pruned triple-row hedges ofGrevillea robusta with 11 rows of maize planted in parallel on either side were grown in 12.5×16.0 m plots on a flat, freely exposed site. There were two replicates of four orientation treatments ... -
Air and Blood Lead Levels in Lead Acid Battery Recycling and Manufacturing Plants in Kenya
(Department of Chemistry, University of Nairobi, 2012)The concentration of airborne and blood lead (Pb) was assessed in a Pb acid battery recycling plant and in a Pb acid battery manufacturing plant in Kenya. In the recycling plant, full-shift area samples taken across 5 days ... -
Improving Food Production by Understanding the effects of intercropping and plant population on soybean nitrogen fixing attributes
(School of Biological Sciences, 2001)This paper quantifies the effects of population density and intercropping on the development and growth of nitrogen fixing attributes of soybean and explains how these attributes influence food through yielding process. ... -
Crop yields of sorghum and soybean in an intercrop
(School of Biological Sciences, 2001) -
Some aspect of logical way of studying dinitrogen fixation in an agroforestry context for improving food production
(School of Biological Sciences, 2001)Dinitrogen fixation in an agroforestry context requires a careful approach which initially require derivation of the methods to be used and careful selection of the priorities of factors which influence the process. Nitrogen ... -
Inter cropping and population density effects on yield component, seed quality and photosynthesis of sorgum and soybean
(School of Biological Sciences, 2001)Population density and intercropping of sorghum (sorghum bicolour (L) and Soybean {Glycine max Merril (L)} may alter their growth and yield patterns through responses to light and physiological attributes as compared to ... -
High-Level Heterologous Expression of Bacillus halodurans Putative Xylanase Xyn11A (BH0899) in Kluyveromyces lacti
(Department of Chemistry, University of Nairobi, 2007-03)The putative xyn11A structural gene (BH0899) encoding a family-11 xylanase from alkaliphilic Bacillus halodurans strain C-125 was heterologously expressed in the yeast Kluyveromyces lactis CBS 1065 and secreted to a level ... -
Sustainable environmental management for poverty alleviation in the Lake Victoria basin
(School of Biological Sciences, 2002)Isolated mouse interstitial cells were incubated with different concentrations of khat (Catha edulis) extract (0.06 mg/ml, 0.6 mg/ml. 6 mg/ml. 30 mg/ml and 60 mg/ml) and cell viability as well as testosterone concentration ... -
Determination Of Nature Of Seeds Dormancy in Sasemum Latifolium (Gillet) and Developing Appropriate Germination Protocols
(School of Biological Sciences, 2009) -
Adsorption and detection of some phenolic compounds by rice husk ash of Kenyan origin
(Department of Chemistry, University of Nairobi,, 2002-12)Rice husk ash (RHA) obtained from a rice mill in Kenya has been used as an inexpensive and effective adsorbent (and reagent) for the removal (and detection) of some phenolic compounds in water. The abundantly available ...
