Browsing Department of Chemistry by Title
Now showing items 111-130 of 323
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Effects of pH and metal ions on oxytetracycline sorption to maize-straw-derived biochar
(Elsevier, 2013-05-30)Biochars produced from biomass residues have been recognized as effective sorbents to hydrophobic compounds, but knowledge on sorption of antibiotics to biochar and its mechanisms are still inadequate. Sorption of ... -
Effects of Possible Spin-Spin Interactions on EPR spectra of Cu2+ exchanged Faujasite–X (I)
(Cambridge University Press, 2005)The interpretation of the continuous wave electron paramagnetic resonance (CW-EPR) spectra of Cu2+ exchanged in Faujasite zeolite is not straightforward. Recent literature points to the role of both Cu2+ zeolite sites and ... -
Effects of processing technologies on chlorogenic acid, gallic acid and theanine in selected Kenyan tea cultivars
(Tea Research Institute, Kenya, 2018)Tea (Camellia sinensis) is popular for its high levels of polyphenols which are attributed to its antioxidant properties. However, other associated biomolecules are also potent antioxidants and contribute to health effects. ... -
Effects of Production Locations and Plucking Intervals on Clonal Tea Fatty Acids Levels in the Kenya Higlands
(J-STAGE, 2012-05-01)Tea leaves contain unsaturated fatty acids which are precursors of aroma compounds. Despite uniform plucking practices in Kenya, plain black tea quality varies with locations. Variations in tea aroma and/or precursors ... -
Effects of regional climate variability on the prevalence of diseases and their economic impacts on households in the Lake Victoria basin of Western Kenya
(Inderscience Publishers (IEL), 2016)Climate variability has a strong influence on disease prevalence and subsequently on economic wellbeing of the affected households. In this study, six regions were selected and clustered into three groups based on their ... -
Effects of Senna didymobotrya root extract and compounds on tritoninduced hyperlipidaemic rats and differentiation of 3T3-Li preadipocytes
(Bentham Science Publishers, 2013-11-03)he lipid lowering effects of Senna didymobotrya (Leguminoceae) root extract (250 mg/kg) and pure isolates (100 mg/kg) were investigated for hypolipidemic activity on Triton-induced hyperlipidemic rats (in-vivo). The extracts ... -
Effects of temperature and humidity and effectiveness of some selected antioxidants on lipid oreochromis niloticus L.) of Lake Victoria, Kenya
(Research Gate, 2021)Spoilage of fish and its related products due to oxidation is a primary problem leading to both loses in income and environmental degradation. Various methods such as sun-drying, smoking and refrigeration as currently ... -
Effects of water stress on growth and water relations of young grafted tea.
(Tea Research Foundation of Kenya, 2009)The effects of soil water stress on some physiological parameters and dry matter partitioning (dm) were studied in grafted tea plants (Camellia sinensis L.) grown in containers and subjected to adequate and reduced water ... -
Effects of zeolite X on dissipation of hexazinone from agricultural waste waters in Western KenyaEffects of zeolite X on dissipation of hexazinone from agricultural waste waters in Western Kenya
(2013)Dissipation of hexazinone in Zeolite X treated wastewater followed pseudo first-order kinetics giving a calculated half-life of 41 days compared to a half-life of 144 days in untreated wastewater. The herbicide degraded ... -
Effects of zeolites X and Y on the degradation of malathion in water
(2013)The inclusion of both zeolites X and zeolite Y significantly affected the dissipation of malathion in water. In the fresh water, malathion degradation followed a pseudo-first order kinetics with concomitant half-life ... -
Efficient adsorption of lead (II) and copper (II) from aqueous phase using oxidized multiwalled carbon nanotubes/polypyrrole composite
(Taylor & Francis, 2018-01-12)Polypyrrole coated oxidized multiwalled carbon nanotubes (oMWCNT/Ppy) were applied to determine the adsorption characteristics of Pb(II) and Cu(II) from their aqueous solutions. Structural and morphological characterization ... -
Efficient removal of lead (II) ions from aqueous solutions using methyl-β-cyclodextrin modified graphene oxide
(Springer International Publishing, 2017-11-01)Graphene oxide (GO) and graphene oxide modified with methyl-β-cyclodextrin denoted as GO-mβCD were prepared and applied as adsorbents to determine the adsorption characteristics of Pb(II) from aqueous solutions. The ... -
Elucidating the causes of low phosphorus levels in ferralsols of Siaya County, Western Kenya
(Academic Journals, 2015-09-01)Low available soil phosphorus (P) is one of the factors limiting crop production in western Kenya. Availability of soil P depends on amount of apatite, addition of P fertilizers, P fixing potential of a soil, soil water ... -
Encapsulation Of Ibuprofen Into Solid Lipid Nanoparticles For Controlled And Sustained Release Using Emulsification Solvent Evaporation Technique
(Published by Innovare Academic Sciences Pvt Ltd., 2019)Objective: The objective of the study was to encapsulate ibuprofen (IBU) into solid lipid nanoparticles (SLNs) for enhanced dissolution and achieving a sustained and controlled release of the drug from the nanocarrier. Methods: ... -
Energy Evaluation and Qualitative Analysis of Biogas Produced from Co-Digesting Kitchen Waste and Cow Dung
(Physical Science International Journal, 2017)Anaerobic digestion is an effective method for organic pollution reduction and bio-energy production and has increasing applications worldwide. Produced biogas consists mainly of 50–70% methane (CH4) and 30–50% carbon ... -
Enhanced degradation of 14 C-HCB in two tropical clay soils using multiple anaerobic–aerobic cycles
(2013-02-28)The aim of the study was to induce and enhance the degradation of hexachlorobenzene (HCB), a highly-chlorinated persistent organic pollutant, in two ecologically different tropical soils: a paddy soil (PS) and a non-paddy ... -
Enhanced microbial degradation of humin-bound phenanthrene in a two-liquid-phase system
(Elsevier, 2011-02-28)Humin, the main component of soil organic matter, greatly influences the nonlinear sorption and desorption hysteresis of polycyclic aromatic hydrocarbons (PAHs) in soil. However, little is known about the bioavailability ... -
Enhanced soil washing process for the remediation of PBDEs/Pb/Cd-contaminated electronic waste site with carboxymethyl chitosan in a sunflower oil–water solven...
(2015-02-01)Abstract An innovative ex situ soil washing technology was developed to remediate polybrominated diphenyl ethers (PBDEs) and heavy metals in an electronic waste site. Elevated temperature (50° C) in combination with ... -
Enhanced soil washing process for the remediation of PBDEs/Pb/Cd-contaminated electronic waste site with carboxymethyl chitosan in a sunflower oil–water solvent system and …
(Springer Berlin Heidelberg, 2015-02-01)An innovative ex situ soil washing technology was developed to remediate polybrominated diphenyl ethers (PBDEs) and heavy metals in an electronic waste site. Elevated temperature (50 °C) in combination with ultrasonication ... -
Enhancement of degradation of DDT and HCB in tropical clay soils in model experiments
(Technische Universität München, 2010)This study sought to enhance the degradation of two persistent organic pollutants (POPs) – DDT and HCB – in two tropical clay soils in model laboratory experiments. Anaerobic-aerobic cycles and amendment with compost were ...