ABSTRACT This study involved isolation of compounds from the plant Monanthotaxis littoralis, screening and evaluating the activity of the compounds against mycotoxigenic fungi isolated from maize collected from LVB and structure elucidation of the bioactive compounds. The non volatile secondary metabolites were extracted from the plant using methanol. The methanol extract was suspended in water and extracted with ethyl acetate. Hydro-distillation was used in the extraction of essential oils....
Abstract The effects of adding different concentrations of Aframomum danielli (powder and ethanoic extracts) on nutritional, physico-chemical and densory properties of wheat flour bread were examined. Using alveograph and consistograph, the physical properties of the dough-water absorption capacity, tenacity, extensibility, strength of flour and peak time were evaluated
ABSTRACT In Africa, 80% of the population use traditional medicinal plants to treat common ailments like malaria, headache and pneumonia. This is due to the high cost of conventional drugs from developed countries. Examples of these medicinal plants include Gardenia volkensii and Meyna tetraphylla that are both used by the Pokots in Kenya to treat a variety of ailments including antimicrobial diseases. The aim of this project was to test for the antimicrobial activity of the crude extracts a...
ABSTRACT Zoonoses are infectious diseases that can be transmitted (in some instances, by a vector) from animals to humans or from humans to animals (the latter is sometimes called reverse zoonosis or anthroponosis). Among these are Babesia spp., Borrelia spp., Rickettsia spp., Ehrlichia spp., Bartonella spp., Anaplasma spp., Francisella tularensis, Coxiella burnetii and certain encephalitis virus that are transmitted by ticks. Of the 1415 pathogens known to affect humans, 61% are zoonotic. T...
ABSTRACT Lightning-Induced Voltages (LIV) affect all electrical conductors and could damage electronic circuits and gadgets even without applied voltage. Several factors, including electrical power line configuration, can affect the magnitude of the lightning-induced voltages. Previous research paid less attention to the effect of line configuration on lightning-induced voltages on overhead power lines and other lines in the tropical environment. The effect of line configuration of electrica...
ABSTRACT Natural Organic Matter (NOM) fractions in rocks, sediments and soils are known to have good sorptive potentials for frequently occurring Hydrophobic Organic Contaminants (HOCs) such as phenanthrene. Despite widespread occurrence of organic matter-rich rocks, sediments and soils in Nigeria, there is limited information on the sorptive potentials of their NOM fractions for HOCs which may be useful in remediation and clean-up design. This study is aimed at investigating the sorption of...
This study sought to assess the existing state of Waste Electrical and Electronic Equipment in Kenya, to improve on the methods of disposal, recycling, and facilitation of a circular economy by households through the use of ICT. The study was driven by the following objectives on how they influence a circular e-waste economy; sociodemographic factors, consumer behaviour, level of access to information and ICT infrastructure. The target population for the study was households within Nairobi Co...
Abstract Subsurface core samples obtained from Enugu 1325 and 1331 wells within the Anambra Basin were characterized by standard organic geochemical methods; Rock-eval and GC-Ms; to deduce the hydrocarbon potential, source input of the organic matter and palaeodepositional environment of the basin. The lithologies in both wells consist of coals, shales and siltstones and belong to the Mamu Formation. The Total Organic Carbon (TOC), Soluble Organic Matter (SOM) and Genetic Potential (GP) of t...
ABSTRACT The prevalence of multi-drug resistant tuberculosis is an increasing health challenge. Attention has therefore been shifted to the use of ethno-medicines in combating this disease. Traditionally, Syzygium guineense (stem-bark) and Mimosa pigra (aerial parts) are used in the treatment of respiratory tract infections with no scientific justification. This study was designed to identify the constituents of Syzygium guineense and Mimosa pigra that may be active against Mycobacterium tub...
ABSTRACT Surface waves have significant effects on the hydrodynamics of offshore bodies or structures on a fluid of finite depth. Wind, moving vessels, seismic disturbances of shallow sea floors (tsunamis) and the gravitational disturbances of the sun and the moon are factors responsible for generation of waves. Their influence is very crucial in engineering analysis, design, and optimization. Many researchers in the field of hydrodynamics have analyzed the effect that surface waves have on ...
ABSTRACT Assistive Technology (ATs) provide means through which persons with visual impairment are empowered with adaptive devices and methods for accessing multimedia information. However, the degree of sensitivity and specificity values for access to electronic resources by visual impaired persons varies. Existing ATs were designed as “one model fits all” (static calibration requirements), thereby limiting the usability by vision impaired users in an e-learning environment. The stu...
ABSTRACT Animal African Trypanosomiasis (AAT) causes economic losses estimated at US $5 billion per annum. Records from the veterinary department indicate high levels of trypanocidal drugs use in Lamu County. The objective of this study was to identify the trypanosome species causing infections in domestic animals in Lamu using parasitological and molecular techniques and to determine their drug sensitivity in white Swiss mice. Fifteen trypanosome stabilates and 92 whole blood samples collec...
ABSTRACT A major requirement in flame spectroscopic methods is that the sample be introduced into the excitation source in form of an aqueous solution. Unfortunately, many materials of interest such as soils, animal tissues, plants, petroleum products and minerals are not directly soluble in water and extensive preliminary treatment is often required to obtain a solution of the analyte in a form ready for atomization. On the other hand, some samples contain both organic and inorganic matrice...
ABSTRACT The results of an investigation of open channel flow in the laminar and transition range are presented. This type of flow found its application in runoff from rainfall. Values of Reynolds number were determined for different slopes in the range 10≤ 0≤ 450. It was found that the velocity of the fluid increases ar the slope of the bottom surface increases. There was a point where the laminar flow range change drastically to transitional flow range and later turbulent.
ABSTRACT In most laser applications it is necessary to focus, modify or shape the laser beam by using lenses and other optical elements. The most important characteristic of a lens is its focal length. The focal length of a lens gives a measure of how strongly the lens either converges or diverges light. When the lens is imperfect, it generates aberrations. This imperfection could be due to disfigured or imperfectly figured optics and misalignments of the lens in an optical system. It’s im...