Browsing School of Biological and Physical Science by Title
Now showing items 527-546 of 925
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Isolation of a new β-carboline alkaloid from aerial parts of Triclisia sacleuxii and its antibacterial and cytotoxicity effects
(Natural Product Research, 2017-01-01)A new β-carboline alkaloid named sacleuximine A (1) together with known compounds palmatine (2), isotetrandrine (3), trans-Nferuloyltyramine (4), trans-N-caffeoyltyramine (5), yangambin (6), syringaresinol (7), sesamin ... -
Isolation of Salmonella and Shigella from fish harvested from the Winam Gulf of Lake Victoria, Kenya.
(University of Nairobi., 2009)Human infections caused by pathogens transmitted from fish are quite common. The aim of this study was to isolate enteric pathogenic bacteria from fish that might be transmitted to humans after the handling or consumption ... -
Isolation, characterization and biological activities of phytoconstituents from Lonchocarpus eriocalyx Harms leaves
(Islamic Azad University, Shahrood Branch Press, 2018-09-01)The plant species Lonchocarpus eriocalyx Harms (Fabaceae) is a deciduous slender tree or shrub which grows up to 15 m tall. It is an important medicinal plant in Kenya used to treat a wide range of ailments including eye ... -
Isolation, characterization and biological activity of organic extractives from Calodendrum capense (L.f.) Thunb.(Rutaceae)
(2018)A novel prenylfuroquinoline alkaloid capensenin (1), an alkaloid confusameline (2), two furanocoumarins psolaren (3) and bergapten (4), were isolated from hexane and dichloromethane crude extracts of stem bark, leaves ... -
Isozyme variation among Amaranthus cultivars.
(Discovery and Innovation, 1996)Electrophoretic variation of esterase (Est), peroxidase (Per), phosphoglucoisomerase [glucose-6-phosphate isomerase] (Pgi) and phosphoglucomutase (Pgm) was studied in seven Amaranthus populations, namely, Jumla, F1 Jumla, ... -
The Kakamega Forest medicinal plant resources and their utilization by the adjacent Luhya community.
(Medwell Online, 2009)Kakamega Forest in Kenya is a rich natural setting endowed with abundant flora and fauna used by the local communities who once lived within the forest and those who now border it. There has been scarcity of information ... -
Kenya-Ethiopia Relations: a Study of the Significance of Economic and Political Factors Contributing to Co-operation, 1963-1991
(Nairobi university, 2005)This thesis analyses and explains the nature of inter-state relations between Kenya and Ethiopia. An analysis of the two countries' relations shows that despite change of leadership in both Kenya and Ethiopia and despite ... -
Kenya’s response to the COVID-19 pandemic: a balance between minimising morbidity and adverse economic impact
(African Academy of Sciences, 2021)Coronavirus disease 2019 (COVID-19) has ravaged the world’s socioeconomic systems forcing many governments across the globe to implement unprecedented stringent mitigation measures to restrain its rapid spread and adverse ... -
Key determinants of food preparation attributes in staging memorable experiences: Perspectives of hotel managers in Western Kenya
(RoutledgeRoutledge, 2014)This exploratory research sought to identify important food preparation factors and attributes in staging memorable experiences. Self-administered questionnaires were distributed to 166 hotel managers drawn from 62 hotels ... -
Key management practices that influence actual ICT application among three to five star hotels in Kenya
(2016)ICTs are considered strategic tool for business management worldwide and fast finding wider application within the hotel industry. However, their use has not always been fruitful due to poor application of the ICTs. This ... -
Kinetic, sorption isotherms, pseudo-first-order model and pseudo-second-order model studies of Cu (II) and Pb (II) using defatted Moringa oleifera seed powder
(The Journal of Phytopharmacology, 2016)In the recent decades, there has been a concern on heavy metals in waste water and high cost of conventional methods of removing heavy metals, for this reason search on adsorbents of biological origin which is low cost and ... -
Lake Victoria: The water hyacinth (Eichhornia crassipes [MART.] SOLMS), its socio-economic effects, control measures and resurgence in the Winam gulf
(Urban & Fischer, 2004-05-01)The aquatic weed Eichhornia crassipes [Mart.]Solms was introduced in Lake Victoria from Rwanda via the Kagera River by the activities of man. After originally infesting Lake Victoria (Uganda), it eventually spread into the ... -
Life at the top: rank and stress in wild male baboons
(American Association for the Advancement of Science, 2011-07-15)In social hierarchies, dominant individuals experience reproductive and health benefits, but the costs of social dominance remain a topic of debate. Prevailing hypotheses predict that higher-ranking males experience higher ... -
Life history context of reproductive aging in a wild primate model
(Blackwell Publishing Inc, 2010-08-01)The pace of reproductive aging has been of considerable interest, especially in regard to the long postreproductive period in modern women. Here we use data for both sexes from a 37‐year longitudinal study of a wild baboon ... -
Linear, primary monohaloalkane chemistry in NaX and NaY faujasite zeolites with and without Na0-treatment: Zeolites as nucleophilic reagents II
(Elsevier, 2006-06-20)This work undertakes, we believe for the first time, a study of the chemistry of alkyl halides in Na0 treated zeolites. It concludes that untreated zeolites do nucleophilic chemistry to the degree that the host is electron ... -
Livelihood assessment of avocado growing in western Kenya and its socioeconomic implications using agricultural extension services
(2018-09-09)Avocado (Persia americana) is an important world crop. In Kenya, it has become a very important crop but its production is limited by several factors. Studies were conducted in the Lake Victoria Basin counties of Bunyala ... -
Lonchocarpus eriocalyx (Harms) Herb Extract for Use as Painkillers
(Science Publishing Group, 2020-02-02)Today, many herbal preparations are being prescribed as analgesics. In the past decade, there has been a resurgence of interest in traditional systems of medicine which has become a topic of global interest. Indeed, many ... -
Long term effects of nitrogenous fertilizers on tea yields, nutrients uptake and some soil chemical properties
(Soil Science Society of East Africa, 2005)A field experiment was set up to determine long tenn responses of different rates of nitrogen fertilizers namely used in tea, N~KS 25:5:5:5 and NPK 20: 10: 10, on tea 'Ields, nutrient uptake and soil chemical properties. ... -
Long term fertilizer use on high yielding clone S15/10: Tea yields
(International society of tea science, 2008)High production of young tender shoots of Camellia sinensis L. O. Kuntze to make tea beverages leads to soil nutrients depletion through harvested crop and leaching. The production can be sustained by replenishing the lost ... -
Longitudinal Trajectories of Four Domains of Parenting in Relation to Adolescent Age and Puberty in Nine Countries
(Child development, 2021)Children, mothers, and fathers in 12 ethnic and regional groups in nine countries (N = 1,338 families) were interviewed annually for 8 years (Mage child = 8–16 years) to model four domains of parenting as a function of ...