Browsing Department of Chemistry by Title
Now showing items 152-171 of 323
-
Flavanol composition and caffeine content of green leaf as quality potential indicators of Kenyan black teas
(1997)The Ñavanol composition and ca† eine content of green tea leaf, black tea quality parameters of theaÑavins, thearubigins, liquor brightness and total colour varied more among clones than with time of the year. In green ... -
Flavanol Composition and Caffeine Content of Green Leaf as Quality Potential Indicators of Kenyan Black Teas
(1997)The Ñavanol composition and ca†eine content of green tea leaf, black tea quality parameters of theaÑavins, thearubigins, liquor brightness and total colour varied more among clones than with time of the year. In green ... -
Flavonoids from Tephrosia interrupta and T. linearis.
(CABI DIRECT, 1990)In east Africa, medicinal uses have been reported for the roots of T. interrupta (coughs and treatment of women after childbirth) and the leaves of T. linearis ([unspecified] diseases in infants). Flavonoid analyses are ... -
Flavonol glycosides with insecticidal activity from methanol extract of Annona mucosa Jacq. leaves
(Islamic Azad University, Shahrood Branch Press, 2019-12)Three flavonoids, quercetin 3-O-β-D-glucoside (1), quercetin 3-O-α-Darabinoside (2) and kaempferol-3-O-β-D-galactoside (3) were isolated from the methanol extract of the leaves of Annona mucosa Jacq. Their structures ... -
Flavour volatiles of Assam CTC black teas manufactured from different plucking standards and orthodox teas manufactured from different altitudes of Darjeeling
(John Wiley & Sons, Ltd, 1988-01-01)Biochemical correlations between volatile flavour constituents (VFC) of CTC bluck teas manufactured from fine and coarse plucking of Assam tea and orthodox teas fiom three different altitudes were carried out by GC-MS. ... -
Function of Nitrate Ion and Tea Saponin Application Rates in Anerobic PAH Dissipation in Paddy Soil
(2016-06-01)Abstract In the present study, KNO 3 and tea saponin (TS) were applied to investigate systematically the potential impact of their concentrations on dissipation of anerobic polycyclic aromatic hydrocarbons (PAH) in ... -
Gender Analysis of Economic Efficiency in Smallholder Tea Production in Kenya
(Eastern Africa Agricultural Economics Society,1979, 2003)If the productivity of tea among the smallholders can only increase to about 2500 kg/ha/yr, the national projection of 300 thousand metric tones would be realized without the need to allocate more land to tea enterprise. ... -
Genotype and environment interactions of yields and yield components of tea (Camellia sinensis) cultivars in Kenya
(Scientific Research Publishing, 2016)The tea crop provides income and employment to rural populations in many countries. In Kenya, tea, which is the leading export commodity crop, is grown in highlands east and west of the Rift Valley at altitudes ranging ... -
High concentrations of polycyclic aromatic hydrocarbons found in water and sediments of car wash and kisat areas of Winam Gulf, Lake Victoria-Kenya
(Springer-Verlag, 2009-01-09)Mean concentrations of selected USEPA priority polycyclic aromatic hydrocarbons (PAHs) in surface sediments and water samples from Car Wash and Kisat areas of Winam Gulf, Lake Victoria in Kenya have been determined ... -
An HPTLC-densitometry method for the quantification of pharmacologically active alkaloids in Sceletium tortuosum raw material and products
(Akadémiai Kiadó, 2012)Mesembrine-type alkaloids are reported to be responsible for the psychoactive properties of Sceletium tortuosum. The aim of the study was to develop a simple, rapid, and precise high-performance thin-layer chromatography ... -
Hydrothermal synthesis of zeolites using silica extracted from tropical volcanic ash
(Royal Society of Chemistry, 2023)This study addresses the reliance on costly aluminosilicate sources for the synthesis of zeolites by exploring the use of silica extracted from tropical volcanic ash. The volcanic ash contained CaO, in the form of calcite ... -
Immobilization of chlorobenzenes in soil using wheat straw biochar
(American Chemical Society, 2013-04-25)Biochar has shown great potential for immobilizing organic contaminants in soil. In this study, pentachlorobenzene (PeCB), 1, 2, 4, 5-tetrachlorobenzene (1, 2, 4, 5-TeCB), and 1, 2, 4-trichlorobenzene (1, 2, 4-TCB) ... -
Impact of Agronomic Inputs in Sugarcane Farming on River Kuywa Surface Water Quality Traversing Sugarcane zones in Western Kenya.
(Maasai mara university, 2011)For sustainable agriculture, the health of people indulged in this activity is paramount. Disease causative agents in these areas should be constantly checked and mitigation measures taken. This research determined levels ... -
Impact of bioaccessible pyrene on the abundance of antibiotic resistance genes during Sphingobium sp.-and sophorolipid-enhanced bioremediation in soil
(Elsevier, 2015-12-30)Abstract Soils are exposed to various types of chemical contaminants due to anthropogenic activities; however, research on persistent organic pollutants and the existence of antibiotic resistance genes (ARGs) is limited. ... -
Impacts of climate-induced changes on the distribution of pesticides residues in water and sediment of Lake Naivasha, Kenya
(Springer Netherlands, 2013-03-01)This study reports evidence of increased chlorpyrifos contamination in sediment and water in Lake Naivasha following its intensive application in the horticultural farms in the catchment area. Analytical results show that ... -
Improved biodegradation of 1, 2, 4-trichlorobenzene by adapted microorganisms in agricultural soil and in soil suspension cultures
(Elsevier, 2011-08-01)Inoculating soil with an adapted microbial community is a more effective bioaugmentation approach than inoculation with pure strains in bioremediation. However, information on the potential of different inocula from sites ... -
Improved biodegradation of 1,2,4-trichlorobenzene by adapted microorganisms in agricultural soil and in soil suspension cultures
(Pedosphere, 2011)Inoculating soil with an adapted microbial community is a more effective bioaugmentation approach than inoculation with pure strains in bioremediation. However, information on the potential of different inocula from sites ... -
In Vitro Permeation of Mesembrine Alkaloids from Sceletium tortuosum across Porcine Buccal, Sublingual, and Intestinal Mucosa
(Planta Medica, 2012)Sceletium tortuosum is an indigenous South African plant that has traditionally been used for its mood-enhancing properties. Recently, products containing S. tortuosum have become increasingly popular and are commonly ... -
Influence of anthropogenic activities and seasons on heavy metals in spring water along Amala and Nyangores tributaries of the Mara River Basin
(Academic Journal, African Journal of Environmental Science and Technology, 2018-07)Anthropogenic activities, including replacing natural forests with human settlements and increased agricultural activities have environmental impacts. The activities can contaminate aquatic ecosystems including spring ...