Browsing PHD-Department of Biochemistry and Biotechnology by Issue Date
Now showing items 1-20 of 65
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Population genetics and taxonomy of important medicinal tree species of the genus Warburgia
(Kenyatta University, 2007-07)The genus Warburgia (Canellaceae) has only four species (W. elongata Verdc., W. salutaris (Berto; f). Chiov, W. stuhlmannii Engl. and W ugandensis Sprague, which occur in east and central Africa. These species are of ... -
Development of a genetic linkage map and quantitative trait loci (QTL) analysis in cowpea (vigna unguiculata (L.) walp)
(2010-06)Cowpea is a diploid plant species which contributes significantly to food security in developing countries, especially in Africa. This research project was carried out in view of the upcoming introduction of Bt cowpea ... -
Morphological and genetic diversity of the new invasive species bactrocera invadens (diptera: Tephritidae) in Africa
(2011-08-02)Species of the genus Bactrocera in the family Tephritidae, or `true fruit flies', are among the most important pests of fruits and vegetables. Because of the broad larval host range and cosmopolitan distribution, pest fruit ... -
Field studies influence of environmental factors and susceptibility to trypanosomosis of the Boran and Boran-N'dama crossbreed cattle in Kenya
(2011-08-04)Trypanosomosis is a disease of humans and domestic animals caused by protozoan parasites of the genus Trypanosoma and mainly transmitted by tsetse flies (Glossina). The current methods for trypanosomosis control include ... -
Use of a non mist propagation system to vegetavely propagate 12 varieties of E.grandis X E. camadulensis hybrids
(2011-08-12)A series of nursery experiments was carried out to assess the effects of rooting medium (sand and clay subsoil, mixed in the following ratios 1:0, 1:1, 1:2, 0:1 and 2:1 respectively by volume), auxin concentration (0%, ... -
Somatic embryogenesis and agrobacterium-mediated transformation of selected maize (zea mays.L) genotypes in Kenya
(2011-08-12)Maize (Zea mays L.) is one of the most important staple human food crop for over 90% of Kenya's population. However production has lagged behind due to drought, pests, diseases, Striga and low soil fertility despite much ... -
The causes and effects of pica habit of pregnant women in Msambweni division, Kwale District, coast province
(2011-08-12)Pica, the habit of eating non-food substances is a worldwide behaviour that is not limited to any geographic area, sex or status. It is common in retarded children and adults with some forms of insanity, hysteria and ... -
Agrobacterium tumefacients mediated introgression of Nicotiniana Protein Kinase (NPK1) gene in selected Kenyan maize genotypes to enhance drought tolerance
(2011-08-12)In the last decade, the production of maize has gone down because of biotic and abiotic constraints, and this has resulted to prevalent famine. Of the abiotic stresses, drought is the most important stress affecting ... -
Gene pool organization, population genetics and wild-crop complex dynamics of cowpea (vigna unguiculata)
(2011-08-12)Cowpea is a tropical legume contributing significantly to food security in developing countries, especially in Africa. This research project was motivated by the upcoming introduction of Bt cowpea in Africa, likely to ... -
Determination of CD8+-cell responses in a high risk HIV negative population
(2011-08-23)Naturally acquired cellular immunity in individuals who have been exposed to HIV-1 but have remained uninfected may hold clues for the design of an effective HIV vaccine. IFNy Elispot has emerged as one of the widely used ... -
Genetic differentiation, vector competence to dengue 2 viruses and host preferences of coastal and inland aedes aegypti populations from Kenya
(2011-08-23)The mosquito, Aedes aegypti is the main vector of dengue viruses responsible for millions of dengue fever and hundred of thousands of dengue hemorrhagic fever cases annually in tropical regions of the world. At the Kenyan ... -
Respones of mosquitoes to heavy metals
(2011-12-15)Investigations were conducted to determine the influence of heavy metals on urban mosquito populations spatial distribution and composition and Anopheles gambiae sensu stricto fitness. Differential induction of proteins ... -
Studies on the Midgut Lectin Gene of Glossina Austeni
(2011-12-19)Trypanosomiasis continues to be a serious problem in sub-saharan Africa. The inadequacies of existing control strategies necessitate the development of alternative control measures. In most cases, the causative agents of ... -
Isolation and characterization of variable antigen types (VATS) of trypanosoma evansi stock in Kenya
(2012-01-06)Trypanosoma evansi is a haemoflagellate of veterinary importance that can infect most mammals but is generally more severe in camels and horses. It causes surra, a disease of great economic importance in Africa, Asia and ... -
Studies on indigenous bacillus thuringiensis isolates active against selected insect pests
(2012-02-06)The overall goal was to contribute to crop-productivity by developing sustainable pest management and the objective was to select and identify and efficacious local B. thuringiensis isolate active against the selected stem ... -
Use of RNA interference and overexpression of purple acid phosphatase genes in management of parasitic plants
(2012-03-23)Parasitic plants are major contributors to food insecurity in poverty stricken Sub Saharan Africa; To date, there is no effective parasitic plant control strategy that has been adopted by the majority of small scale farmers ... -
Distribution importance and management of stemborers (lepidoptera) in maize production systems of semi-arid Eastern Kenya with emphasis on biological control
(2012-04-05)The bulk of maize, which is the main staple food in semi-arid Eastern Kenya, is grown by subsistence small-scale farmers, and the yields are usually low, averaging 500kg/ha Stemborers are one of the major causes of these ... -
Bovine interleukin-3: cloning production and gene expression in cattle infected with trypanosoma angolense
(2012-05-04)Interleukin-3 (IL-3) is one of the cytokines that act during the early and late stages of blood cell formation. To enable the study of the role of IL-3 in bovine haemopoietic stem cell differentiation, the polymerase chain ... -
Studies on some reproductive physiological aspects of the Kenyan fruit bat, eldolon helvum (KERR, 1792) (Megachiroptera)
(2012-06-05)Cytochemical procedures have been used to study the anterior pituitary gland (adenohypophysis) of the Kenyan fruit bat Eidolon helvum (Kerr, 1792) during various reproductive phases, which comprise preovulatory, ovulatory, ... -
Ecological and behavioural studies of mosquitoes in Mwea Tebere irrigation scheme Kirinyaga district Kenya with special reference to anopheles arabiensis (diptera; culicidae)
(2012-06-05)During this investigation which took place between April 1989 and February 1991, an attempt was made to determine the impact of rice irrigation practices on 1 mosquito species diversity and their relative population density; ...
