ABSTRACT Unsteady MHD heat and mass transfer over an infinite flat plate with convective surface boundary condition problems have received little attention yet they are of great importance in many scientific and engineering fields particularly in the manufacture and maintenance of ship propulsion unit and thermal energy storage processes in nuclear plants. Every research work that would give results aimed at improving the efficiency of the modern marine vessels is of significance to the field...
Abstract The norms of inner and generalized derivations on dierent kinds of al- gebras have been determined. However, the norms of their restrictions to norm ideals have not been fully explored. For instance, the concept of Suniversality having been introduced by Fialkow in 1979, has not been fully characterized yet it plays a critical role in the study of norms of derivations. In this study, we have investigated both the algebraic and the norm properties of a generalized derivation. Spec...
ABSTRACT The Lagos lagoon system is the main water body in Lagos State and it is highly polluted. It receives enormous amount of domestic and industrial wastes from rivers and creeks. In this study, three main Lagos trans-urban streams Odo-lyaalaro, Shasha and Ibeshe creeks that empty into the Lagos Lagoon were examined. For the study, samples were collected bimonthly for a year and the physicochemical properties of both the water and sediments were determined. The pseudototal heavy metal con...
ABSRACT Eight cellulolytic microfungi were isolated from wood-wastes obtained from Okobaba sawmills, Ebute-Metta, Lagos. The microfungi include two pathogenic fungi, Aspergillus Aavus and Aspergillus fumigatus, and three different strains of the black aspergilli, Aspergillus niger, (designated herein as A. niger 1, A. niger 2 and A. niger 3). The other isolates are Fusarium solani, Penicillium chrysogenum, and Trichoderma harzianum. The filamentous fungi, A. nigeri, P. chrysogenum and T. har...
ABSTRACT Identification of Crop-Growing Seasons of Semi-Arid Kenya by Analvses of the Soil Moisture Patterns. (May 1984) David Kasina }1usembi, B.S., University of Nairobi Chairman of Advisory Cormnit tee i- Prof. John F. Griffiths Eight stations wit~ over 30 years of rainfall record were selected in the dry region of Kenya, east of 37°E longitude, to study the nature of the crop growing seasons during the short and the long rains (October through June). The rainfall data were reduced to soi...
ABSTRACT Sugarcane is an important cash crop in Kenya. Due to its economic value, efforts are in progress to increase its production. The efforts include intense use of fertilizers, besides the use of high-yielding varieties. The intense use of fertilizers adds heavy metals to the sugarcane growing soils. The sugarcane plants can bioaccumulate heavy metals from soils to levels above safe limits. Metal levels in soil and factors such as soil pH and soil organic matter (SOM) influence levels of...
ABSTRACT African nightshades (Solanum scabrum) is one of indigenous vegetables widely consumed in Kenya. It is used for food, income and for medicinal purposes, but faces low yields due to severe damage by aphids. Yield losses due to aphids is estimated to about 84-96% in Kenya. Aphids have developed resistance to synthetic pesticides. There is need to search for ecofriendly alternatives such as the use of botanicals like pyrethrum which are cheaper. Pyrethrum extracts are known to control in...
Abstract Trypanosomiasis is a debilitating disease which is a major constraint to livestock production in sub-Saharan Africa. It leads to loss of productivity in animals and without treatment it is frequently fatal. The economic and social repercussions it causes in areas where it is endemic, makes its control a priority operation. In this study we formulate three models; a basic model to understand the transmission dynamics of the trypanosomiasis in a cattle population, a model with treatmen...
ABSTRACT Biological control of Ceratocystis paradoxa using Trichoderma spp. were conducted on oil palm spouted seeds. Eighteen spp. of fungi belonging to ten genera were identified as fungi associated with diseased sprouted seeds. Out of these genera, Aspergillus spp. occurred most frequently and in relative abundance at 25.9%, Trichoderma spp. (23.4%), Ceratocystis paradoxa (11.1%), Fusarium spp (9.9%), Penicillium spp. (8.7%), Rhizopus sp. (7.4%) and Curvularia sp. (4.9%) respectively. Pest...
ABSTRACT Sugarcane smut disease caused by a fungus Sporisorium scitamineum is a limiting factor to cane production in Kenya. It is threatening the sugar industry due to its effect on cane quality and yields. Sugarcane (Saccharum officinarum L.) is known to have microbial organisms associated with its rhizosphere with potential antagonistic activity against the fungus, however numerous studies on rhizosphere microbial diversity and their antagonistic activity against fungal plant pathogens hav...
ABSTRACT Tinea capitis (ring worm) is a superficial fungal infection of the scalp and hair of the head. According to World Health Organization (WHO), the prevalence rate of superficial mycotic infection worldwide has been found to be 20-25% and the infection presents a major public health problem in primary school-age children especially those from low and middle income countries like Kenya. Tinea capitis inflicts a lot of psychosocial trauma in children due to attached stigma, ulceration and...
ABSTRACT Breast cancer is a top killer illness for women globally, but early and effective screening can increase their survival rate. Mammography is the tool used by a radiologist to screen for breast cancer, however, a radiologist is susceptible to human observer variability, and therefore, reading and interpretation of mammography test results depend on the expertise of the radiologist administering the test. To improve the reading and interpretation accuracy of the test, researchers’ de...
ABSTRACT Dietary deficiencies of iron and zinc are high. Underutilized crops are rich in micronutrients but are cultivated at subsistence level due to high perishability and poor processing of products. These crops are potential sources of iron and zinc but there is no documentation that reveals if they can be processed into safe, acceptable and nutritious food products that can improve their exploitation. An informal experimental study design was used to evaluate preparation of safe, accepta...
ABSTRACT The study of automorphisms of algebraic structures has contributed immensely to many important findings in mathematics. For example, Galois characterized the general degree five single variable polynomials f over Q, by showing that the roots of such polynomials cannot be expressed in terms of radicals, through the automorphism groups of the splitting field of f. On the other hand, the symmetries of any algebraic structure are captured by their automorphism groups. The study of comple...
ABSTRACT Sera from 775 persons in 10 age-groups, living in Lagos metropolis, were titrated for Toxoplasma antibodies, using the haemagglutination test. The overall percentage positive was 63.2%. The highest (78.4%) was found amongst the age group ranging from 36-40 years, whilst the lowest (48.2%) was recorded in the age group. 11-15 years. The risk of non-immune persons acquiring infection was calculated in the different age groups using Van Der Veen's equation. Venous blood samples, cord bl...