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Now showing items 61-80 of 15465
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Soil physicochemical properties under Acacia senegal varieties in the dryland areas of Kenya
(2011-08)Acacia senegal is a multipurpose drought-tolerant tree or shrub legume and is commonly used in agroforestry systems in sub-Saharan Africa for gum arabic production and soil fertility improvement. Despite its wide distribution ... -
Bacteriological quality and diarrhoeagenic pathogens on River Njoro and Nakuru Municipal water, Kenya
(2011-09)Waterborne diarrhoeal pathogens are considered a re-emerging threat and are responsible for considerable morbidity and mortality, especially in developing countries. The objective of this study was to determine bacteriological ... -
Synthesis and insecticidal activities of some selected hydroxytriazenes. Journal of Environmental Chemistry and Ecotoxicology
(2011-10)Eight hydroxytriazenes were synthesized and then subjected to spot tests. The composition of these hydroxytriazenes was analyzed using elemental analysis and their physical characteristics like melting point, crystal shape ... -
Synthesis and insecticidal activities of some selected hydroxytriazenes
(2011-10)Eight hydroxytriazenes were synthesized and then subjected to spot tests. The composition of these hydroxytriazenes was analyzed using elemental analysis and their physical characteristics like melting point, crystal shape ... -
Nonthermal synthesis of three-dimensional metal oxide structures under continuous-flow conditions and their catalytic applications
(American Chemical Society, 2011-10-25)Continuous-flow synthesis of one-dimensional (1D) metal oxide nanostructures and/or their integration into hierarchical structures under nonthermal conditions is still a challenge. In this work, a nonthermal, continuous-flow ... -
Irrigation rate and mulch type significantly affect some physiological processes of purple passion fruit (Passiflora edulis f. edulis Sims.) under drought stress.
(2011-12)Purple passion fruit (Passiflora edulis f. edulis Sims.) is an important fruit in the tropics, but its growth can be adversely affected by drought stress. This study evaluated effects of irrigation rate and mulch type on ... -
Spectrophotometric Determination of cobalt (II) in low concentrations using hydroxytriazene as selective chelating agents
(2011-12)The present work describes a selective, rapid and simple spectrophotometric method for the determination of cobalt (II) at trace levels using some selected hydroxytriazene. The method is based ... -
Spectrophotometric determination of cobalt (ii) in low concentrations using hydroxytriazene as selective chelating agents.
(2011-12)The present work describes a selective, rapid and simple spectrophotometric method for the determination of cobalt (II) at trace levels using some selected hydroxytriazene. The method is based on the reaction of hydroxytriazene ... -
How to Write Winning Proposals and Acceptable Scientific Papers in Agricultural Sciences
(Talent Graphics Limited, 2012)Preface This book was prepared to sharpen the writing skills of students and scholars. Good writing is good to read and understand. Most scientists are unable to get finds from donors due to their inability to write ... -
Determination of Hall Effect Parameters of Gallium Arsenide and Gallium Manganese Arsenide by Van Der Pauw Geometry
(2012)Gallium Arsenide (GaAs) has been used widely in electronic industry to make diodes and transistors. As a semiconductor, it can be doped up with impurities with magnetic properties such as manganese to increase its electron ... -
Determination of optical band gap and heat dissipation of Ga1-xMnxAs with Light in UV-VIS-IR Region using OSA SPECTRO 320”,
(International Knowledge Sharing Platform, 2012)Heat generated by silicon-based transistors due to high energy photo irradiation interferes with the electronic conductivity of transistors in the ICs. There is need to search for an alternative semiconductor material ... -
“The startling effect of the sound of C. Afra And A. Tormotus on the female A. gambiae”
(2012)The female Anopheles gambiae, a malaria vector, detects ultrasound by its antenna, initiating an attractive or repulsive response. Modern electronic mosquito repellents exploit this concept in attempt to control malaria, ... -
A Comparative study of the transmission parameters of the sound of mosquito predators and EMR”
(2012)The wide bandwidth EMR ultrasound, exploited in mosquito repellency, yielded only 20 % effectiveness. Due to this wide bandwidth, ultrasound from Amolops tormotus and Coleura afra, mosquito predators, was investigated. The ... -
Ordinal Logistic Regression Versus Multiple Binary Logistic Regression Model for Predicting Student Loan Allocation
(2012)This paper examines two different methodologies to a classification problem of higher education loan applicants. The paper looks into the allocations made by the Higher Education Loans Board (HELB) relative to the economic ... -
Unconditional Banach Space Ideal Property’’
(Scientific Advances Publishers, 2012)Abstract Let Lw ′ denote the assignment which associates with each pair of Banach spaces X , Y , the vector space Lw ′ ( X , Y ) and K ( X , Y ) be the space of all compact linear operators from X to Y. Let T ∈ Lw ′ ( X ... -
Effects of Auxin and Source of Explants on Callus Induction of Tropical Maize
(2012)Induction of callus from explants is a critical process in regeneration, micropropagation and transformation of plants. Formation of callus from plant tissues on culture is affected by different factors. This study sought ... -
User’s perception on ICT adoption in High schools
(2012)Information Communication Technology (ICT) plays a crucial role in the effectiveness, efficiency and service delivery of any institution. ICT has also been credited with the potential to integrate world economies thus ... -
Spectrophotometric Determination of Iron (III) by New Analytical Reagents Derived from Coupling Arylhydroxylamine and Aryldiazonium salt
(2012)A highly sensitive and selective spectrophotometric method is developed for the determination of iron(III) in aqueous solution withhydroxytriazenes. In this work, the effect of pH variation, the composition ... -
Geochemical and Mineralogical Characteristics of Geophagic Materials from Kiambu, Kenya
(2012)Geophagia is the deliberate consumption of soil and clay. The practice of geophagia is due to reasons of culture, medicinal, religious and mineral deficiency. Geophagy is widespread among pregnant and ... -
Antibacterial and antifungal activities of novel hydro
(2012)In a search for new leads potent antimicrobial agents, an array of novel hydroxytriazenes i-xi were synthesized and characterized through their melting point, crystal shape, colour and elemental analysis. ...