Browsing Department of Chemistry by Title
Now showing items 131-150 of 323
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Errata. Pyrrolizidine Alkaloids from Senecio hadiensis
(American Chemical Society, 1991-09)17-Oxosparteine (1 mg), -isolupanine (3 mg), and N-methylcytisine (2 mg) were iden- tified by ms and tic comparisons with authentic samples (6,8). Catalytic reduction (2 mg) of 5,6-dehydrolu- panine (4 mg), oil, ms (9) ... -
Errors in parameters estimation using linearized adsorption isotherms: sulfadimethoxine adsorption onto kaolinite clay
(Chemical Science International Journal, 2018-08-29)In this work, an isothermal investigation of the adsorption of sulfadimethoxine from aqueous solution onto clay mineral (kaolinite) using batch equilibration method is reported. The equilibrium data were modelled using ... -
Evaluation of enhanced soil washing process and phytoremediation with maize oil, carboxymethyl-β-cyclodextrin, and vetiver grass for the recovery of organochlorin...
(Academic Press, 2014-08-01)Abstract An innovative ex situ soil washing technology was developed in this study to remediate organochlorine pesticides (OCPs) and heavy metals in a mixed contaminated site. Elevated temperature (60 C) combined with ... -
Evaluation of enhanced soil washing process with tea saponin in a peanut oil–water solvent system for the extraction of PBDEs/PCBs/PAHs and heavy metals from an electronic …
(John Wiley & Sons, Ltd, 2015-11)Problems associated with PBDEs/PCBs/PAHs and heavy metals mixed contaminated sites have received wideattention. To address the associated environmental concerns, innovative remediation techniques are urgently needed -
Evaluation of Fish Processing and Preservation Systems along the Shores of Lake Victoria towards Enhancement of Sun Drying Technology
(Scientific & Academic Publishing, 2017)Fish products play an important role in human diet due to peculiar lipid composition. In Kenya Lake Victoria is an important source of fresh water fish contributing over 90% of the national fish production. The Lake Victoria ... -
Evaluation of malaria spread in relation to poor environmental conditions at Kibaha district (Tanzania)
(Open Access Science Research Publisher, 2015)Communicable diseases cause a lot of out- patient attendance resulting to huge allocation of funds by both Governmental and Non – governmental organizations in combating them. A cross section study was conducted at Maili ... -
Evaluation of soil properties of sugarcane zones and cropping systems for improved productivity in Western Kenya
(International Journal of Agronomy and Agricultural Research (IJAAR), Vol. 11, No. 3, p. 1-16, 2017, 2017-09-30)Unsuitable soil properties can adversely affect sugarcane productivity. The role of soil chemical, physical and biological properties on low productivity has not been evaluated. Soil nutrient survey was conducted to evaluate ... -
Evaluation of soil washing process with carboxymethyl-β-cyclodextrin and carboxymethyl chitosan for recovery of PAHs/heavy metals/fluorine from metallurgic plant...
(Elsevier, 2014-08-01)Abstract Polycyclic aromatic hydrocarbons (PAHs)/heavy metals/fluorine (F) mixed- contaminated sites caused by abandoned metallurgic plants are receiving wide attention. To address the associated environmental problems, ... -
Evaluation of sugarcane cropping systems in relation to productivity at Kibos in Kenya
(International Journal of Agricultural Policy and Research Vol.2 (7), pp. 256-266, 2014-07)Low sugarcane productivity is widespread and has persisted in all zones in western Kenya over the last decade despite the release of many improved sugarcane varieties during the same period. Three sugarcane varieties, two ... -
Evaluation of tea clones for resistance/tolerance to mites infestations and the influence of environmental factors on mites dynamics in Kenyan tea farms.
(International Society of Tea Science, 2016)Mites infestations reduce yields in tea production world wide. However, some tea cultivars are resistant/tolerant to mites attack. The resistance/susceptibility can also be influenced by abiotic factors. This study ... -
Evaluation of the Effectiveness of Traditional Rastrineobola argentea Sundrying Process Practiced along the Shores of Lake Victoria, Kenya
(Scientific & Academic Publishing, 2015-01-26)Quality of fish depends on its texture, odour and hinges on duration of harvesting and processing. Traditional sun-drying free-to air of Rastrineobola argentia who’s effectiveness and efficiency to reduce moisture content ... -
Evidence of non-DDD pathway in the anaerobic degradation of DDT in tropical soil
(Springer Berlin Heidelberg, 2019-03-01)DDT transformation to DDD in soil is the most commonly reported pathway under anaerobic conditions. A few instances of DDT conversion to products other than DDD/DDE have been reported under aerobic conditions and hardly ... -
Extracellular polymeric substances enhanced mass transfer of polycyclic aromatic hydrocarbons in the two-liquid-phase system for biodegradation
(Springer-Verlag, 2011-05-01)The objective was to elucidate the role of extracellular polymeric substances (EPS) in biodegradation of polycyclic aromatic hydrocarbons in two-liquid-phase system (TLPs). Therefore, biodegradation of phenanthrene (PHE) ... -
Factors impeding tea production in smallholder sub-sector of the Kenya tea industry: an assessment extension staff awareness of existing technologies.
(Tea Research Foundation of Kenya, 2000)This study assessed the level of extension staff in the various technological packages when compared to the agronomic research recommendations. The survey covered 76 extension staff in Kirinyaga, Nyambene, Nandi and Nyamira ... -
Fate processes of chlorobenzenes in soil and potential remediation strategies: A review
(Elsevie, 2017-06-30)Abstract Chlorobenzenes (CBs) are a group of organic pollutants that pose a high environmental risk due to their toxicity, persistence and possible transfer in the food chain. Available data in literature show that CBs ... -
Fate processes of chlorobenzenes in soil and potential remediation strategies: A review
(Elsevier, 2017-06-01)Chlorobenzenes (CBs) are a group of organic pollutants that pose a high environmental risk due to their toxicity, persistence and possible transfer in the food chain. Available data in literature show that CBs are ... -
Fate Studies of Chlorsulfuron in Selected Soils Within the Mara River Basin of Kenya
(Maseno University, 2016)Chlorsulfuron is a sulfonylurea herbicide used to control broadleaf and grass weeds in wheat farms within the Mara River Basin. It is assumed to be environmentally safe due to low application rates, relatively shorter ... -
Feasibility of an enhanced washing process to extract PBDEs/heavy metals/antibiotics from antibiotic resistance gene-affected soil with aqueous DNA followed by mi...
(2016-03-01)Abstract Purpose Remediation of polybrominated diphenyl ethers (PBDEs)/heavy metals/antibiotics mixed contaminated soil with high abundance of antibiotic resistance genes (ARGs) has being greatly challenging. Materials ...