Faculty of Science & Technology (FST): Recent submissions
Now showing items 281-300 of 4283
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Comparative oesophageal cancer risk assessment of hot beverage consumption (coffee, mate and tea): the margin of exposure of PAH vs very hot temperatures.
(University of Nairobi, 2018)BACKGROUND: Consumption of very hot (> 65 °C) beverages is probably associated with increased risk of oesophageal cancer. First associations were reported for yerba mate and it was initially believed that high content ... -
Cytotoxic flavonoids from two Lonchocarpus species.
(University of Nairobi, 2018)A new isoflavone, 4'-prenyloxyvigvexin A (1) and a new pterocarpan, (6aR,11aR)-3,8-dimethoxybitucarpin B (2) were isolated from the leaves of Lonchocarpus bussei and the stem bark of Lonchocarpus eriocalyx, respectively. ... -
Cytotoxic benzylbenzofuran derivatives from Dorstenia kameruniana
(University of Nairobi, 2018)Chromatographic separation of the extract of the roots of Dorstenia kameruniana (family Moraceae) led to the isolation of three new benzylbenzofuran derivatives, 2-(p-hydroxybenzyl)benzofuran-6-ol (1), 2-(p-hydroxybenzyl ... -
Sequential extraction as novel approach to compare 12 medicinal plants from Kenya regarding their potential to release Chromium, Manganese, Copper, and Zinc.
(University of Nairobi, 2018)This study is focusing on a novel approach to screen a large number of medicinal plants from Kenya regarding their contents and availability of selected metals potentially relevant for treatment of diabetes patients. For ... -
Genetic and Toxigenic Variability within Aspergillus flavus Population Isolated from Maize in Two Diverse Environments in Kenya.
(University of Nairobi, 2018)Aspergillus flavus is the main producer of carcinogenic aflatoxins in agricultural commodities such as maize. This fungus occurs naturally on crops, and produces aflatoxins when environmental conditions are favorable. The ... -
A model for predicting utilization of mHealth interventions in low-resource settings: case of maternal and newborn care in Kenya.
(University of Nairobi, 2018)BACKGROUND: In low-resource settings, there are numerous socioeconomic challenges such as poverty, inadequate facilities, shortage of skilled health workers, illiteracy and cultural barriers that contribute to high ... -
Perpendicular Magnetic Anisotropy In Mn2VIn (001) Films: An Ab Initio Study
(University of Nairobi, 2018)First principles study of the magnetic anisotropy of Mn2VIn (001) films show perpendicular magnetic anisotropy (PMA), which increases as a function of the thickness of the film. Density functional theory (DFT) as implemented ... -
Climate change and pastoralists: perceptions and adaptation in montane Kenya
(University of Nairobi, 2018)Tropical montane forests are amongst the most threatened ecosystems by climate change. However, little is known about climatic changes already observed in these montane areas in Africa, or the adaptation strategies used ... -
Quantification of carbon stocks in Mount Marsabit Forest Reserve, a sub-humid montane forest in northern Kenya under anthropogenic disturbance
(University of Nairobi, 2018)The quantification of carbon stocks is vital for decision making in forest management, carbon stock change assessment and scientific applications. We applied the land degradation surveillance framework (LDSF) method with ... -
A co-integration analysis of the interdependencies between crude oil and distillate fuel prices
(University of Nairobi, 2018)The co-evolution and co-movement of financial time series are of utmost importance in contemporary finance, especially when considering the joint behaviour of asset price realizations. The ability to model interdependencies ... -
Influence of annealing temperature on some optical and structural properties of Cu2ZnSnS4 deposited by CZT co-electrodeposition coupled with chemical bath technique
(University of Nairobi, 2018)Copper indium gallium selenide (CIGS) is currently most efficient thin film solar technology in use but it is faced with problems of material scarcity and toxicity. An alternative earth abundant and non-toxic materials ... -
Adapting agriculture to climate change: suitability of banana crop production to future climate change over Uganda
(University of Nairobi, 2018)The aim of this study was to determine suitability zones of future banana growth under a changing climate to guide the design of future adaptation options in the banana sub-sector of Uganda. The study used high resolution ... -
Structural, Electronic And Magnetic Properties Of The Heusler Alloy Mn 2 VIn: A Combined DFT And Experimental Study
(University of Nairobi, 2018)Structural, electronic and magnetic properties of the Heusler alloy Mn 2 VIn have been investigated using the density functional theory and experimental techniques. Unlike many other Heusler ... -
Perpendicular Magnetic Anisotropy In Mn2VIn (001) Films: An Ab Initio Study
(University of Nairobi, 2018)First principles study of the magnetic anisotropy of Mn2VIn (001) films show perpendicular magnetic anisotropy (PMA), which increases as a function of the thickness of the film. Density functional theory (DFT) as implemented ... -
LIBS development methodology for forensic nuclear materials analysis
(University of Nairobi, 2018)Nuclear forensics (NF) is an important tool for the analysis of intercepted nuclear and radiological materials (NRM) to establish the relationship between NRM and their attribution in support of nuclear security. The ... -
Occurrence and multivariate exploratory analysis of the natural radioactivity anomaly in the south coastal region of Kenya
(University of Nairobi, 2018)Characterized by a variety of rock formations, namely alkaline, igneous and sedimentary that contain significant deposits of monazite and pyrochlore ores, the south coastal region of Kenya may be regarded as highly ... -
Trends of intraseasonal descriptors of wet and dry spells over equatorial eastern Africa
(University of Nairobi, 2017)Many African countries whose economies are largely based on weather/climate sensitive sectors are vulnerable to long‐term changes in weather and climate. This study is aimed at assessing whether the recent decades have ... -
Climate Change Projections And The Associated Potential Impacts For Somalia
(University of Nairobi, 2018)Somalia has faced severe challenges linked to climate variability, which has been exacerbated by conflict and limited governance that persisted for decades. Today climate extremes such as floods, drought, and coastal marine ... -
Potential Impacts Of Temperature Projections On Selected Large Herbivores In Savanna Ecosystem Of Kenya
(University of Nairobi, 2018)Due to global land surface warming, severe temperature events are expected to occur more frequently and more extremely causing changes in biodiversity and altering movement and survival of large herbivores. There are ... -
Magnitudes Of Climate Variability And Changes Over The Arid And Semi-Arid Lands Of Kenya Between 1961 And 2013 Period
(University of Nairobi, 2018)The magnitude and trend of temperature and rainfall extremes as indicators of climate variability and change were investigated in the Arid and Semi-Arid Lands (ASALs) of Kenya using in-situ measurements and gridded climate ...