Gold Collection: Recent submissions
Now showing items 901-920 of 1028
-
An ImmunoEpidemiological Model for HIV/AIDS Incorporating Viral and Cellular Transmission with Antiretroviral Treatment Applied Mathematical Sciences
(Applied Mathematical Sciences, 2019)In this paper an immuno-epidemiological model for HIV and AIDS incorporating viral and cellular transmission with antiretroviral treat- ment is formulated. Using ordinary di_erential equations, the two trans- mission ... -
Selective Interactions of O-Methylated Flavonoid Natural Products with Human Monoamine Oxidase-A and –B
(Molecules, 2020-11-17)A set of structurally related O-methylated flavonoid natural products isolated from Senecio roseiflorus (1), Polygonum senegalense (2 and 3), Bhaphia macrocalyx (4), Gardenia ternifolia (5), and Psiadia punctulata (6) plant ... -
Evaluating flood extent mapping of two hydraulic models, 1D HEC-RAS and 2D LISFLOOD-FP in comparison with aerial imagery observations in Gorgan flood plain, Iran
(Natural Resource Modeling, 2019-02-20)We compared flood mapping techniques using a one-dimensional (1D) hydraulic model HEC-RAS and two-dimensional (2D) LISFLOOD-FP for a 10-km reach of Gorgan River in Iran. Both models were run using the same hydrologic input ... -
Agrobacterium-Mediated Transformation of Selected Kenyan Maize (Zea mays L.) Genotypes by Introgression of Nicotiana Protein Kinase (npk1) to Enhance Drought Tolerance
(American Journal of Plant Sciences, 2014-03)Currently maize production in the East and Central Africa (ECA) region is at 1.3 tonnes per hectare compared to the potential of up to 7.0 tonnes per hectare because of biotic and abiotic constraints, and this has resulted ... -
Signal Transduction One of the Current Molecular Approaches in the Management of Drought Stress in the Sub-Saharan Region
(Biotechnology, 2010-11)Drought affects maize production in Africa leading to up to 70% crop loss and in certain cases total crop loss. Several breeding interventions have been attempted with little success. Thus alternative complementation ... -
In vitro Regeneration by Indirect Organogenesis of Selected Kenyan Maize Genotypes using Shoot Apices
(Biotechnology, 2008-09)The study reports a reliable and reproducible regeneration system of two open pollinated varieties-OPV`s (Katumani KAT and dry land cultivar DLC1), a hybrid (DH01) and an inbred line (TL08) using shoot apices as explants ... -
Allellopathic potential of invasive Psidium guajava L., against selected native tree species in Kakamega Tropical Forest, Western Kenya.
(IOSR Journal of Pharmacy and Biological Sciences, 2016-05)Studies have previously attributed P. guajava invasiveness to its aggressive regeneration and profuse seeding. This study, however verified that its allellopathic influence on native plant species also plays an important ... -
The Allelopathic Impact of Psidium Guajava L., Leaf Extracts on the Germination and Growth of Cassia occidentalis L., Seeds
(Journal of Agriculture and Veterinary Science, 2016-07)Weeds have been termed plant pests because of the damage they haveimposed on plants. The use of synthetic chemicals to control weeds has elicited doubts amongst various stakeholders because of environmental pollution and ... -
Derivatization Reactions and Reagents for Gas Chromatography Analysis.
(Advanced Gas Chromatography - Progress in Agricultural, Biomedical and Industrial Applications, 2012-03)Derivatization reactions are meant to transform an analyte for detectability in Gas Chromatography (GC) or other instrumental analytical methods. Derivatization in GC analysis can be defined as a procedural technique that ... -
Residue levels and discharge loads of antibiotics in wastewater treatment plants ( WWTPs), hospital lagoons, and rivers within Lake Victoria Basin, Kenya.
(Environmental Monitoring and Assessment, 2016-08)The detection of antibiotics in water systems has instigated great environmental concern due to the toxicological effects associated with these compounds. Their discharge into the environment results from the ubiquity of ... -
Bioaccumulation of perfluoroalkyl acids in dairy cows in a naturally contaminated environment.
(Environmental Science and Pollution Research, 2013-05-04)Beef and dairy products may be important vectors of human exposure to perfluoroalkyl acids (PFAAs), but the understanding of how PFAAs are accumulated and transferred through agricultural food chains is very limited. Here, ... -
Per- and polyfluoroalkyl substances in selected sewage sludge in Nigeria.
(Chemosphere, 2013-07-03)Levels of seven major perfluoroalkyl carboxylates (PFCAs) and three perfluoroalkyl sulfonates (PFSAs) were analyzed for the first time in sludge from wastewater treatment plants from Nigeria. Measurements were performed ... -
Perfluoroalkyl acids in selected wastewater treatment plants and their discharge load within the Lake Victoria basin in Kenya
(Environmental Monitoring and Assessment, 2015-04-11)A major ecological challenge facing Lake Victoria basin is the influx of chemical contaminants from domestic, hospital, and industrial effluents. Determined levels of perfluoroalkyl acids (PFAAs) in wastewater and sludge ... -
Insights on adsorption of carbamazepine onto iron oxide modified diatomaceous earth: Kinetics, isotherms, thermodynamics, and mechanisms
(Environmental Research, 2020-01)To ameliorate adsorbent recovery by an external magnetic field, naturally occurring diatomaceous earth (DE) was modified with iron-oxide, characterized and applied for adsorption of carbamazepine (CBZ) from synthetic ... -
Biodegradation of carbofuran in soils within Nzoia River Basin, Kenya
(Journal of Environmental Science and Health, Part B, 2015-04)Carbofuran (2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate) has been used within the Nzoia River Basin (NRB), especially in Bunyala Rice Irrigation Schemes, in Kenya for the control of pests. In this study, the ... -
Comparative studies in electrochemical degradation of sulfamethoxazole and diclofenac in water by using various electrodes and phosphate and sulfate supporting electrolytes
(Journal of Environmental Science and Health, Part A, 2016-06-23)In this study, the electro-oxidation capacities of Na2SO4 and potassium phosphate buffer supporting electrolytes were tested and compared for destruction of the sulfamethoxazole (SMX) and diclofenac (DCF) on platinum (Pt) ... -
Perfluorinated Compounds Distribution and Source Identification in Sediments of Lake Victoria Gulf Basin
(Soil and Sediment Contamination, 2011-03-03)Perfluorooctanoic acid and perfluorooctane sulfonate were determined in the sediments from Winam Gulf, which is in the Kenyan side of Lake Victoria and in its source rivers. The sources of perfluorinated compounds within ... -
The Dissipation of Carbofuran in Two Soils with Different Pesticide Application Histories within Nzoia River Drainage Basin, Kenya
(Bulletin of Environmental Contamination and Toxicology, 2014-02-28)The dissipation of carbofuran from soils within the Nzoia River Drainage Basin in Kenya was studied under real field conditions for 112 days. Results showed significantly enhanced dissipation of carbofuran with half life ... -
Assessment of heavy metals in benthic macroinvertebrates, water and sediments in River Isiukhu, Kenya
(Environmental Monitoring and Assessment, 2019-10-16)A major ecological challenge facing freshwater resources such as rivers is the influx of chemical contaminants from anthropogenic sources. A report on the levels of heavy metals, namely Zn, Cu, Cr, Cd and Pb in benthic ... -
The Influence of Filter Mud Compost and Tithonia diversifolia Leaves on the Dissipation of Diuron in Soils within the Nzoia River Drainage Basin, Kenya
(Bulletin of Environmental Contamination and Toxicology, 2012-05-22)The aim of the study was to evaluate the environmental impact of filter mud compost and Tithonia diversifoila amendments on the dissipation of diuron in sugarcane cultivated soils. Filter mud compost is the by-product of ...
