Browsing Department of Chemistry by Title
Now showing items 27-46 of 323
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Assessment of water quality of the Nyando River (Muhoroni-Kenya) using the water quality index (WQI) method
(Research gate, 2019)The quality of a river water is described by the levels of physico-chemical and microbiological parameters. The aim of the study was to determine the water quality of NyandoRiver water from four sampling stations (Muhoroni, ... -
Bioactive Analysis of Auricularia Delicata: Extraction, Purification, and Characterization of Polysaccharides from Auricularia Delicata-Morocco Forest
(Academia, 2020)Auricularia mushrooms are bioactive compounds which are mostly polysaccharides. Many studies have shown the use of Auricularia from wild mushroom for medicinal purposes such as antioxidant, antidiabetic, antitumor, ... -
Bioactive carbazole alkaloids from Alysicarpus ovalifolius (Schumach)
(The Korean Society for Applied Biological Chemistry, 2015-12-01)Phytochemical and biological evaluation of the stem bark of Alysicarpus ovalifolius led to the isolation of three carbazole alkaloids identified as mohanimbine (1), koenimbine (2) and koenidine (3) along with quercetin ... -
Bioavailability assessment of hexachlorobenzene in soil as affected by wheat straw biochar
(Elsevier, 2012-05-30)Biochar incorporation with soil could increase sorption of organic contaminants, thereby reducing their bioavailability. In this study, the effects of wheat straw biochar on the sorption, dissipation and bioavailability ... -
Biodegradation activity of Aspergillus niger lipase isolates from a tropical country garage
(Journal of Scientific and Innovative Research, 2016)Microbial biodegradation of oil pollutants and their derivations has become the most environmental-friendly method in the developing world. Lipolytic enzyme; Aspergillus niger extracted from oil polluted soil has ... -
Biomolecular interactions of 1, 3-bis (2-arylimino) isoindolate-based palladium (II) complexes: Substitution kinetics, DNA/protein-binding, and molecular docking approaches
(Elsevier, 2023-08-22)A series of 1,3-bis(2-arylimino)isoindoline Pd(II) complexes core viz.; Chlorido(1,3-bis(2-pyridylimino)isoindoline)palladium(II), Pd1, Chlorido(1,3-bis(4-methyl-2-pyridylimino)isoindoline)palladium(II), Pd2, Chlorido(1, ... -
Biosorption for lead (II) ions from aqueous solutions by the biomass of Spyridia filamentosa algal species found in Indian Ocean
(Journal of Scientific and Innovative Research, 2015)Biosorption of heavy metals is an efficient cost effective method for removal of heavy metal ions from industrial wastewater. Studies have shown that algal species biomasses have high uptake of heavy metal ions. In this ... -
Black tea: Biochemical changes during processing
(Oxford University Press, New York, 2014) -
Catechins and Plain Black Tea Parameters Variations in Selected Tea Growing Agro-Ecological Zones in Kenya
(International Society of Tea Science, 2019)Over 60% of tea in Kenya is produced by smallholder tea farmers distributed in the East and West of the Rift Valley. With all smallholder tea farmers using the same production technologies including planting materials, the ... -
Causes and Consequences of Post-Election Violence in Kenya
(2023-10-05)The election of leaders by the people is the aim of democratic procedures. An electoral system is intended to ensure that the outcomes reflect the preferences of the majority of voters, providing elected officials’ ... -
Challenges of maintaining tea quality
(2016)Tea (Camellia sinensis (L.) O. Kuntze) is an important cash crop contributing to economic wellbeing and wealth in many developing countries. The crop creates employment opportunities and development in the rural areas ... -
The changes in black tea quality due to variations of plucking standard and fermentation time
(Elsevier, 1998)Catechin levels in green leaf, total theaflavins, brightness, thearubigins, colour, flavour index and sensory evaluation decrease with coarse plucking standard in clone 6/8. The sum of Group I volatile flavour compounds ... -
The changes in black tea quality due to variations of plucking standard and fermentation time
(Elsevier, 1998-04)Catechin levels in green leaf, total theaflavins, brightness, thearubigins, colour, flavour index and sensory evaluation decrease with coarse plucking standard in clone 6/8. The sum of Group I volatile flavour compounds ... -
Changes in soil chemical properties and leaf nutrients content in tea due to nitrogen fertilizer rates and application intervals.
(Tea Research Foundation of Kenya, 2010)Tea (Camellia sinensis (L.) O. Kuntze) plant, requires much more nitrogen than most of the other nutrients for its growth, development and sustainability of harvestable crop. Soil as a resource of plant nutrients, cannot ... -
Changes in soil properties following conversion of forests into intensively managed Camellia sinensis L. plantations along a chronosequence.
(International Society of Tea Science, 2012)Tea in Kenya was introduced in the beginning of the 20th Century, although commercial cultivation commenced in 1924. The total acreage of tea plantations has steadily increased and currently covers approx. 0.15 million ha, ... -
Changes in the chemical and sensory quality parameters of black tea due to variations of fermentation time and temperature
(Elsevier, 2001-12-31)The changes in theaflavins and residual catechin compositions, thearubigins TRSI and TRSII, sensory characteristics of total colour, brightness and briskness of black tea were investigated. It was demonstrated that the ... -
Changes in the Composition of Elements in Non-Aerated Green Teas Processed from Seedling Tea (Camellia sinensis) Due to Variations in Nitrogenous Fertilizer Rates and Seasons.
(International Journal of Tea Science Vol 13, No. 1&2 (2017) : 80-93, 2017)Soil nutrients are lost to the plant with harvested crop in tea production with most ending up as minerals and contribute to human nutrition upon tea consumption. Production of non-aerated green tea in Kenya has been low. ... -
Changes in the Composition of Elements in Non-Aerated Green Teas Processed from Seedling Tea (Camellia sinensis) Due to Variations in Nitrogenous Fertilizer Rates and Seasons.
(International Journal of Tea Science, 2017)Soil nutrients are lost to the plant with harvested crop in tea production with most ending up as minerals and contribute to human nutrition upon tea consumption. Production of non-aerated green tea in Kenya has been low. ... -
Changes in theaflavin composition and astringency during black tea fermentation
(Elsevier, 1994-01-01)Both theaflavins and sensory evaluations vary in a quadratic manner with fermentation duration in the process of black tea manufacture. The rate of formation of total (Flavognost) theaflavins varies with clones, and within ...