Browsing by Issue Date
Now showing items 81-100 of 1182
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A New Sterol Diglycoside from Conyza floribunda
(The South African Journal of Chemistry, 2009)Chemical investigation of CH2Cl2 and MeOH extracts of Conyza floribunda have led to the isolation of (24S)-ethylcholesta-5, 22E, 25-trien-3-O-glucosyl (1” 4’)-rhamnoside (1), (24S)-ethylcholesta-5,25-dien-3-O- -glucoside ... -
Hydrologic properties of grazed perennial swards in semiarid southeastern Kenya
(2009)Identification of plant resources that persist under grazing pressure, support desirable levels of production and at the same time protect the grazing environment is central to sustainable livestock production. This study ... -
Economics evaluation of relative profitability in small hold dairy farms in western Kenya
(Academic Journals, 2009-05)The development and implementation of farm policies requires the general understanding of the farmers’ response to the availed technology. Where farmers have similar resource endowment, generalization of policies would ... -
Triterpenes of Commiphora holtziana oleo-gum resin
(NRC Research Press, 2009-07)Chemical analysis of the acetone extract of Commiphoraholtziana gum resin has led to the isolation of triterpenes characterized as methyl 3-oxo-1α,19α,28-trihydroxyurs-12-en-24-oate (1), methyl 3β-acetyl-2α,11α,19α,28-te ... -
Continuation load flow with a neuro fuzzy model of an induction motor for voltage stability analysis
(2010)This paper uses the concept of the continuation power flow analysis used in voltage stability Analysis for control the power in large systems. It uses the PV curves to find the knee point of a certain bus. A neuro fuzzy ... -
A Comparison of Performance Between Unit Trusts and A Market Portfolio of Shares at Nairobi Stock Exchange
(2010)There has been a dramatic increase in the number of individuals who want to invest in the securities offered in the Nairobi stock exchange. The amount of funds however, required tend to be prohibitively high to many. ... -
Comparison of aggregation methods of induction motor models for transient stability load modeling
(2010)This paper focusses on the comparison of the aggregation methods of multiple induction motors (IM) connected in parallel on the same bus into a single equivalent model using the no-load and locked-rotor and transformer ... -
The link between seasonal climatic variability and poverty: A case study of pastoral and agro-pastoral communities in Baringo District, Kenya
(2010)Poverty remains rampant in the dry districts of Kenya so that it has now become an important item on Kenya’s development agenda. The dry districts of Kenya receive low amounts of rainfall, which is also erratic. These ... -
Dry matter yields and hydrological properties of three perennial grasses of a semi-arid environment in east Africa
(2010)Enteropogon macrostachyus (Bush rye), Cenchrus ciliaris L. (African foxtail grass) and Eragrostis superba Peyr (Maasai love grass) are important perennial rangeland grasses in Kenya. They provide an important source of ... -
Opportunities and challenges for smart grid communications
(2010)The current power grid is in the verge of being improved. Recent technological advances have made possible the creation of a new and improved grid known as the smart grid. Smart grid allows for better interaction between ... -
Influence of micro-catchment technology on above ground biomass production and financial returns of range grasses in southern Kenya.
(2010)A study was conducted in the southern rangelands of Kenya to compare the effect of two micro-catchments, ox-furrows and crescent shaped pits (Kiboko range pits) on the above ground biomass production of three range grasses. ... -
Effects of Selected Routine Husbandry Practices on Growth Rate of Weaned Small East African Goats
(2010)This study was conducted to determine the effects of overnight housing, helminthes control, supplementation and their combinations on average weight gain of weaned Small East African Goats (SEAG) in the semi-arid southeastern ... -
Improving soil hydrological properties of denuded semi-arid rangeland in southeastern Kenya using reseeding technology
(2010)A study was conducted to establish the contribution of Eragrostis superba, Enteropogon macrostachyus and Cenchrus ciliaris in improving soil hydrological properties in semi-arid Kenya. Kamphorst rainfall simulator was used ... -
UNDERSTANDING THE TRAVEL MOTIVATION AMONG YOUTH TRAVELERS IN KENYA: THE ‘PUSH’ AND ‘PULL’ PARADIGM
(2010)This study explores the factors that motivate youth travel in Kenya using the ‘Push’ and ‘Pull’ theory. This questionnaire survey involved 132 respondents aged between 15 and 32 years drawn from visitors to Nairobi National ... -
Analysis of a fuzzy logic power system stabilizer for stability enhancement
(2010)Modern power systems consist of several generators working synchronously to meet the Power demand. For reliability of these systems, stability must be ensured in case of faults within the system. Faults within a system ... -
Effects of Fermentation on the Total Carotenoids, Fat, Free Fatty Acids and Minera ls in Soybean and Sweetp otato Flour Blends
(Egerton Journal Of Science And Technology, 2010)Soybeans and sweetpotatoes are high in micronutrients and convertible carotenoids, respectively. Utilization of micronutrients is hampered by anti-nutritional factors intrinsic to nutrient sources. Carotenoids must first ... -
Investigating the impact of power system stabilizers in a multi machine system with an induction motor load
(2010)The high reactive power demand by the induction motor load during fault condition due to reduced bus voltages may cause a generator to behave like a voltage source behind the synchronous reactance and its terminal voltage ... -
Power factory load flow sensitivity analysis of an induction motor load model
(2010)Power factory Load flow sensitivity is a method used to obtain certain relationship between dependent and independent variables using differential relationship among physical measure in systems. Voltage sensitivity analysis ...