Browsing School of Biological and Physical Science by Title
Now showing items 909-925 of 925
-
Variations in soil pH, N, P and K due to influence of rates, split applications of nitrogen fertilizer and ratoon crop of sugarcane varieties
(ResearchGate, 2023)Fertilizer Best Management Practices (BMPs) include soil testing that is performed to determine the availability of essential elements for profitable and productive yields of crops. The objective of this research was to ... -
Variations in the Precursors of Plain Black Tea Quality Parameters Due to Location of Production and Nitrogen Fertilizer Rates in Eastern African Clonal Tea Leaves
(Cambridge University Press, 2016-04)Summary Theaflavins contribute to astringency and brightness while thearubigins contribute to colour and mouth feel of black tea. Green leaf flavan-3-ols influence levels and distribution of theaflavins and thearubigins ... -
Variations in the Volatile Flavour Compounds Composition of Selected Nerica Rice Varieties Grown in Different Agro-Ecological Zones in Lake Victoria Basin, Kenya
(Maseno University, 2017)Rice (Oryza sativa L.) is a staple food consumed worldwide. Some rice cultivars are preferred over others due to their distinctive aroma which contributes to consumer acceptability and increased economic importance. New ... -
Variations of fatty acids levels in young shoots of clonal tea with location of production and nitrogenous fertilizer rates in the Kenya highlands
(Journal of Agricultural Science and Technology, 2012)Tea leaves contain unsaturated fatty acids, key precursors of volatile compounds contributing to tea aroma quality. Tea is cultivated in areas with diverse environmental conditions. Nitrogenous fertilizers influence tea ... -
Variations of Fatty Acids Levels in Young Shoots of Clonal Tea With Location of Production and Nitrogenous Fertilizer Rates in the Kenya Highlands
(Journal of Agricultural Science and Technology, 2012)Tea leaves contain unsaturated fatty acids, key precursors of volatile compounds contributing to tea aroma quality. Tea is cultivated in areas with diverse environmental conditions. Nitrogenous fertilizers influence tea ... -
Vitamin D status in healthy black African adults at a tertiary hospital in Nairobi, Kenya: a cross sectional study
(BioMed Central, 2018)Vitamin D has been known since the twentieth Century for its benefits in bone health. Recent observational studies have demonstrated its benefits in infectious diseases such as tuberculosis and non-communicable diseases ... -
Voulkensin C–E, new 11-oxocassane-type diterpenoids and a steroid glycoside from Caesalpinia volkensii stem bark and their antiplasmodial activities
(Pergamon, 2013-05-15)A bioassay guided isolation of potential antimalarial molecules from the stem bark of Caesalpinia volkensii Harms (Fabaceae) achieved three new 11-oxocassane-type diterpenoids named voulkensin C (1), D (2) and E (3) together ... -
Water Hyacinth (Eichhornia crassipes) Management and Utilization in the Lake Victoria Region
(Department of Horticulture Jomo Kenyatta University of Agriculture and Technology, JKUAT, 2002)Water hyacinth has long been perceived as a problem for shipping and fishing industries and only more recently as a threat to bio-diversity. It can undergo rapid proliferation, forming dense mats of plants that cover water ... -
Water Quality of Selected Fishing Beaches of Lake Victoria Kenyan Gulf
(Scientific Research Publishing, 2020-01-06)Lake Victoria the second largest fresh water body in the world located in East Africa is a shared resource between Kenya, Tanzania and Uganda and enjoys a wide range of streams and rivers from as far as Burundi and Rwanda. ... -
Weak Solution of the Singular Cauchy Problem of Euler-Poisson-Darboux Equation for n= 4
(2013)We consider the singular Cauchy problem of Euler-Poisson-Darboux equation (EPD) of the form utt+ k t ut=∇ 2u u (x, 0)= f (x), ut (x, 0)= 0 where∇ 2 is the Laplacian operator in R n, n will refer to dimension and k a real ... -
Yield and Yield Stability of Four Population Types of Grain Sorghum in a Semi‐Arid Area of Kenya
(Crop Breeding, Genetics & Cytology, 2000-03-01)Sorghum [Sorghum bicolor (L.) Moench] is widely grown in semi‐arid tropics where local farmers depend on the adaptability of their rainfed crops to unpredictable drought and other stress factors. To investigate the effects ... -
Yield improvement of Kenyan sesame varieties
(University of Nairobi, 2001)In an effort to improve the yield of Kenyan sesame cultivars the seeds of three cultivars, SPS SIK6, SIK 096 and SPS SIK 50/1 were subjected to 300Gy, 400Gy and 600Gy of gamma rays. A first batch of seeds were subjected ... -
Yield response of tea clone 6/8 to growing environments, nitrogenous fertiliser application and plucking intervals in East Africa.
(Inter-University Council for East Africa Lake Victoria Research Initiative, 2011)In East Africa, tea growing areas fall in several agro-ecological regions, differing widely in elevation and climatic factors. Despite the differences, agronomic inputs are uniform throughout the region. Clone TRFK 6/8 is ... -
Yields and Nitrogenous Fertiliser Use Efficiency Responses of Clonal Tea (Camellia Sinensis) to Locations of Production
(International Journal of Tea Science Vol 13, No. 1&2 (2017) : 32-40, 2017)Tea husbandry practices in Kenya are uniform despite variations in responses to agronomic inputs with locations. Nitrogen availability is the most limiting tea/crop growth factor. However, tea yields vary with region of ... -
α-Amylase and α-glucosidase inhibitors from Zanthoxylum chalybeum Engl. root bark
(Elsevier, 2020-10-01)A systematic analysis of the root bark of Zanthoxylum chalybeum was conducted to establish the antidiabetic potential of isolated compounds based on its ethnomedicinal use to manage diabetes. Chromatographic separation of ... -
δ13 values of the Centrospermeae species and their ecological implications in the semi arid conditions
(Asian Network for scientific infomation, 2008)13C values of the Centrospermeae species are presented. 69.5, 28.45, 1.25 and 0.8% of the total species are C3, C4, C3-C4 and CAM photosynthetic species. The δ13C values are species dependent. δ13C values for the C3 range ...
