EXTENDED ABSTRACT There is high degree of rice diversity in Tanzania. Increased human population pressure and activities has caused the population of wild rice to disappear at alarming rate. NPGRC collected over 125 accessions of rice landraces and 7 wild relatives for conservation and sustainable utilization in improvement programs, but no morphological or genetic diversity study that have been done to support any future collections. An investigation was conducted to determine the extent o...
Abstract This study is a contribution to the understanding of the depositional environment and reservoir architecture of the “JI Field”, Niger Delta Nigeria. The main objective was to integrate sequence stratigraphy and petrophysical evaluation in characterizing the reservoirs encountered in the wells. Well logs from six wells (JI01, JI02, JI03, JI09, JI10 and JI12-ST), biostratigraphic data from two wells (JI01 and JI02) and 3D seismic volume were analyzed to understand the reservoirs c...
Light-Emitting Diodes (LEDs) are used in a variety of devices ranging from watches to solar home systems, as status indicators or communicative tools. They are typically designed to produce light in different colors andintensities. However, the communicative output varies across devices of similar or different functions. This variation and the sense that there is a wide array of expressions that can be employed, makes it hard for users of the devices to deduce the feedback easily. This rese...
ABSTRACT There is a growing industrial demand for peptones of non-animal origin owing to legislations as well as outbreak of animal-associated diseases. Microbiological growth media developed from legumes as sources of protein hydrolysates are limited. It is, therefore, the aim of this study, to produce comparatively standard protein hydrolysates from Prosopis africanaseed that can be used as peptone for microbial culture in place of animal peptone. Prosopis africana seeds (2.5kg) were purch...
ABSTRACT The study was designed to formulate sorghum-soybean composite supplementary foods and investigate the effect of extrusion on nutritional value and tannin content. The products were extruded and analysed for nutritional value, tannin content, urease activity, sensory and anti-oxidant activity. Results showed that, the extruded composite products had good nutritional value and conformed to the requirements for supplementary foods for older infants and young children. Nutritional compo...
ABSTRACT Increased frequency, severity and duration of drought events in arid and semi-arid regions (ASALs) of Kenyan increase scarcity in water and pastures that support livestock assets. This destabilizes the livelihood base dependent on livestock assets. Use of seasonal climate forecasts (SCFs) can provide early warning of the drought events and inform actions to reduce vulnerability of pastoral households to drought effects. This study assessed trends and severity of drought events, their...
ABSTRACT The aim of this study was to characterize stroke lesions and normal brain tissue in computed tomography (CT) images of Nigerian patients using statistical texture descriptors, and to identify the class of texture descriptor that is most suitable for computer-aided diagnosis of stroke. Non-contrast CT images of 164 stroke patients were obtained in contiguous slices from the base of the skull to the vertex from two private radiodiagnostic centres. Initially, two experienced radiologis...
ABSTRACT Banana is an important crop in East Africa. In the tropics, banana and plantains are a major source of carbohydrate for about 400 million people of whom 200 million are from East Africa. In Kenya, the banana serves both as a subsistence crop as well as a cash crop. The production of banana in Kenya is however constrained by viral diseases especially the Banana Streak Disease (BSD) which is caused by the Banana Streak Virus (BSV). Breeding between A and B-genomes containing banana ha...
ABSTRACT Common bean (Phaseolus vulgaris L.) is largely consumed among various communities in Kenya. However, its productivity is gradually declining due to infections such as common bacterial blight and halo blight. Zanthoxylum gilletii and Markhamia lutea have been used traditionally in the management of various human bacterial pathogens. In addition, plants are inhabited by fungal endophytes that produce bioactive secondary metabolites. This study therefore, was to determine the bioactivit...
Abstract Observational works on 4.83 GHz Formaldehyde (H2CO) absorptions and 4.87 GHz H110α radio recombination lines towards 6.7 GHz Methanol (CH3OH) maser sources are presented. Methanol masers provide ideal sites to probe the earliest stages of massive star formation, while 4.8 GHz Formaldehyde absorptions are accurate probes of physical conditions in dense and low temperature molecular clouds towards massive star forming regions. Feature similarities between the formaldehyde absorptions...
ABSTRACT Ixodid ticks respond to a limited spectrum of stimuli in their search for hospitable environments, hosts and mates hence change in their behavior. This responsiveness is mediated by pheromones which are signaled by biochemical changes that occur during different stages of feeding. Genes induced during blood feeding result in the expression of new proteins secreted into tick foveal gland. Some of these proteins may be involved in the biosynthesis of these pheromones. Assembly behavior...
ABSTRACT This research project was done to investigate the influence of different methods of coffee processing on quality of the final product. The processing methods studied were wet pulping, hand pulping and eco-pulping. These processing methods vary on their modes of pulping and mucilage removal. The work was carried out using two cultivars of Kenya arabica coffee (Coffea arabica) grown in Nyeri County near Mt. Kenya. The quality parameters determined in the study included; physic-chemica...
ABSTRACT Palladium-catalysed Suziki-Miyaura cross-coupling (SMC) reactions of 6-chloro-5H benzo[a]phenothiazin-5-one, 11-amino-6-chloro-9-thio-5H-naphtho[2,1-b]pyrimido[5,4-e][1,4] oxazin-5-one and 6-chloro-5H-naphtho[2,1-b]pyrido[2,3-e][1,4]oxazin-5-one with phenylboronic acid and 3-nitophenylboronic acid were thoroughly investigated. The above intermediates were prepared by the reactions of 2-aminothiophenol, 4,5-diamino-6-hydroxylpyrimidine-2-thiol and 2- aminpyridin-3-ol respectively wi...
ABSTRACT The idea of pool testing originated from Dorfman during the World War II as an economical method of testing blood samples of army inductees in order to detect the presence of infection. Dorfman proposed that rather than testing each blood sample individually, portions of each of the samples can be pooled and the pooled sample tested first. If the pooled sample is free of infection, all inductees in the pooled sample are passed with no further tests otherwise the remaining portions of...
ABSTRACT Disparate enterprises can pool together their core competencies to form a temporary organization in order to exploit a market opportunity. This inter-organizational collaboration of enterprises is commonly referred to as a virtual enterprise (VE). The success of any VE is dependent on the partner members’ performance and influence of the partner attributes on its performance. These members and their attributes need to be carefully evaluated. The competitive advantage of any VE is ...