Browsing School of Biological and Physical Science by Title
Now showing items 889-908 of 925
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Ultracold Atom-Ion Systems in Hybrid Traps
(Humboldt-Universität zu Berlin, 2017-11-21)This thesis deals with the theoretical description of a hybrid system of an ultracold neutral atom and a single ion. These hybrid atom-ion systems combine the key advantages of ultracold neutral atoms and ions. In particular, ... -
Ultracold Atom-Ion Systems in Hybrid Traps
(Humboldt-Universität zu Berlin, 2017-11-21)This thesis deals with the theoretical description of a hybrid system of an ultracold neutral atom and a single ion. These hybrid atom-ion systems have attracted significant interest in recent years. They combine the key ... -
Ultrasonic propagation in fractal porous material having rigid frame
(X ECCOMAS Thematic Conference on Smart Structures and Materials, 2023-07-03)This paper discusses the impact of the fractal structure of porous materials on wave behavior. In addition to commonly used parameters such as porosity, tortuosity, viscous and thermal characteristic lengths, a fractal ... -
Understanding yields in alley cropping maize (Zea Mays L.) and Cassia siamea Lam. under semi-arid conditions in Machakos, Eastern Kenya
(IOS Press, 2001-01-01)Six seasons of experiments in Machakos, Kenya, revealed that above about 150 mm of rainfall, maize yields per row in alley cropped "replacement" agroforestry (AF) plots, of Cassia siamea Lam. and maize (Zea mays, cv. ... -
Uptake of conventional interventions, level of awareness and perception on computer vision syndrome: a cross-sectional study among University students, Kenya
(Ophthalmol J, 2021)Awareness and perception are critical determinants in the uptake of a health intervention. This study assessed the level of awareness and perception in relation to the uptake of interventions of computer vision syndrome (CVS) ... -
Ursane and tirucallane-type triterpenes of Boswellia rivae oleo-gum resin
(Taylor &Francis, 2016)Two new ursane-type triterpenes characterized as 3-oxo-24-acetoxy11α-hydroxy-urs-12-ene (1) and methyl 3α-acetoxy-11α-methoxyurs-12-en-24-oate (2), together with known compounds 3–11, were isolated from Boswellia rivae ... -
The use of green tea (Camellia sinensis) leaf flavan-3-ol composition in predicting plain black tea quality potential
(Elsevier, 2007-12-13)Reliable and quantifiable green leaf parameters for predicting black tea quality potential of tea bushes at the single bush stage are necessary to shorten tea breeding and clonal selection programmes. Green leaf ... -
The use of green tea (Camellia sinensis) leaf flavan-3-ol composition in predicting plain black tea quality potential
(Elsevier, 2007-01-01)Reliable and quantifiable green leaf parameters for predicting black tea quality potential of tea bushes at the single bush stage are necessary to shorten tea breeding and clonal selection programmes. Green leaf flavan-3-ols ... -
The use of phytochemical composition of fifty (50) selected plants found in the university botanic garden, Maseno, Kenya to show
(Research gate, 2015-08-02)Qualitative phytochemical analysis of 50 plants, five each from 10 selected families is presented. The ten plant families were selected based on their high plant frequency of occurrence within the botanic garden. The ... -
Using phenotypic based approaches to compare Escherichia coli isolates from human, livestock, fish and environmental sources within the Lake Victoria basin of Kenya
(Academic Journals, 2013-10-18)The study compares Escherichia coli recovered from human, fish products, domesticated animals and the environment within the Lake Victoria basin on the basis of their antimicrobial susceptibility profiles. A total of 134 ... -
Utilization of fruit waste substrates in mushroom production and manipulation of chemical composition
(Elsevier, 2022-01)The current study evaluated the effect of mushroom cultivation using fruit waste substrates on yield performance and antioxidant activities. The total phenolic content and the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical ... -
Validated RP-UHPLC PDA and GC–MS methods for the analysis of psychoactive alkaloids in Sceletium tortuosum
(Elservier, 2012)Anecdotal evidence indicates that Sceletium tortuosum has been used as a psychoactive preparation for several centuries. The psychological activity is attributed to the production of mesembrine-type alkaloids (mesembrenol, ... -
Validated RP-UHPLC PDA and GC–MS methods for the analysis of psychoactive alkaloids in Sceletium tortuosum
(Elsevier, 2012)Anecdotal evidence indicates that Sceletium tortuosum has been used as a psychoactive preparation for several centuries. The psychological activity is attributed to the production of mesembrine-type alkaloids (mesembrenol, ... -
valuation for resistance to the spotted stem borer, Chilo Partellus, in a maize (zea mays L.) population. Maize Production Technology for the Future: Challenges and Opportunities. Proceedings of the Eastern and Southern Africa Regional Maize Conference, 6; Addis Ababa (Ethiopia); 21-25 Sep 1998.
(Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)., 1999)AGenetic variability and predicted responses to S2 and testcross selection methods were studied in an open-pollinated variety resistant to the spotted stem borer,(Chilo partellus Swinhoe). Evaluation after one cycle of ... -
Variability of overhead volatile organic compounds in clonal tea (Camellia sinensis) and their influence on red crevice mite (brevipalpus phoenicis geijskes) infestati...
(2016)Tea production in Kenya is under threat due to red crevice mites (Brevipalpus phoenicis) infestations during droughts. Cultural pests control practices, eg use of resistant/tolerant cultivars are used in their control ... -
Variability of VTEC Gradient and TEC Rate Index Over Kisumu, Kenya During Selected Quiet and Storm Days of 2013 and 2014
(Science Publishing Group, 2019)Vertical Total electron content (VTEC) gradient or rate of change of TEC (ROT) and total electron content (TEC) rate index or rate of change of TEC index (ROTI) can directly be estimated from receiver independent exchange ... -
Variation for adaptability to dryland conditions in sorghum
(African Crop Science Society, 1996)African Crop Science Journal Vol.5. No.2, pp.127-138 1997 Variation for adaptability to dryland conditions in sorghum G.O. OMANYA, P.O. AYIECHO and J.O. NYABUNDI Code Number: CS96049 Sizes of Files: Text: 33.9K Graphics: ... -
Variation in catechin composition of popularly cultivated tea clones in East Africa (Kenya)
(2013)Variation in catechin composition of popularly cultivated tea clones in East Africa (Kenya) -
Variation in indoor levels of polycyclic aromatic hydrocarbons from burning various biomass types in the traditional grass-roofed households in Western Kenya
(Elsevier, 2011-07-31)Biomass burning as fuel in the traditional grass-roofed rural households of Western Province of Kenya in open fire places, in poorly ventilated conditions, lead to accumulation of soot under the roofs. This study ... -
Variations in Camellia sinensis (L) Leaf Nutrients and Polyphenols Levels with Genotypes, Nitrogenous Fertilizer Rates, Season and Plucking Intervals in Eastern Africa Tea Growing Regions
(Mase University, 2013)In Eastern Africa, teas are grown in high rainfall areas causing fast nutrients depletion. Foliar nutrients diagnostic limits developed for seedling tea have been in use since 1970s and they have been adopted for clonal ...