Studies have been done on the aspect ratio effect on natural convection turbulence using standard k-ε model but further studies showed that k-ω SST model performed better than both k-ε and k-ω model in the whole enclosure. Thus, there was need to do a numerical study on the natural convection fluid flow in a rectangular enclosure full of air using SST k-ω model. The left vertical wall of the enclosure was maintained at a steady high temperature Th of 323K while the right wall at a s...
ABSTRACT There have been many investigations on the combinatorial structures and invariants over the group actions on the subsets of its elements. Studies on Group Theory have yielded varied and important results in the advancement of Algebra. Several studies have also been made on Graph Theory. Some Mathematicians have studied the concept of automorphisms on graphs thereby yielding important results. Automorphism groups from graphs containing the cyclic and dihedral groups, Cn and Dn respect...
ABSTRACT Natural radiation is the major source of external doses in our environment. Human exposure to high dose rates poses a health risk. In this research work, radiometric survey and dose rate assessment was carried out on Archean rocks within the gold belt mining complex of Migori, Kenya. The objective was therefore to find out the contribution of different Archean rocks to the ambient gamma-ray dose in the mining complex. The high-resolution gamma-ray spectroscopy NaI (TI) provided a sen...
ABSTRACT Antibiotic resistance is a growing concern for public and animal health. Threats to public health could come from the transfer of pathogens from animals to people via indirect contact such as through food or by direct contact with animals during handling process. Development and prevalence of antibiotic resistance of Salmonella and Escherichia coli strains is common. There is also acquisition of pathogenicity by the commensals. The purpose of the present study was to determine the pr...
ABSTRACT Medicinal plants are essential components of primary health care, especially for rural communities indeveloping countries. The medicinal plants contain essentialelements that are beneficial therapeutically. For example zinc plays a vital role in wound healing, nervous system, reproductive system and immune system. Chromium helps in metabolism and management of type-2 diabetes. Sodium is the chief extracellular ion and helps to maintain the body’s fluid balance while potassium is th...
ABSTRACT Despite advances in understanding of the causes, treatment and prevention of diarrhoeal diseases an estimated 4.6 million people die from diarhoreal diseases every year. Diarrhoea can either be acute or chronic, with acute diarhoea being the most common form. The main agents of diarrhoreal diseases include viruses like rotavirus, bacteria such as Enterobacteria e.t.c and parasitic agents like Cryptosporidium. The disease has been found to attack mostly the children who are below the ...
ABSTRACT Due to industrialization and increase in population, there is need for clean, green and renewable source of electrical energy. Traditional sources of electrical energy like fossil fuels are getting depleted, on the other hand silicon based solar cells are expensive hence the need for low cost and reliable alternative source of energy. Photovoltaic is a reliable energy source which is renewable. Photovoltaic is a process of conversion of solar energy to electricity directly using...
ABSTRACT Kenya has been experiencing rising cases of diseases such as diabetes, tuberculosis, liver complications, HIV/AIDS among others. Management of these conditions can be enhanced by use of plant-based trace elements. There is a need therefore to investigate crops that can provide a cheap source of these essential immune boosting trace elements. Grain amaranth is grown in different parts of Kenya including Bureti, Mt Elgon, Bondo, Meru and Embu. However, little research has been reporte...
ABSTRACT Ground magnetic survey in Lake Baringo area was carried out to examine underlying geology in relation to anomalies in the magnetic field of the earth arising from the magnetic properties of subsurface lithology. This has been done to delineate areas associated with high temperature reservoir in the study area and establish if it relates with the occurrence of geothermal manifestations. The field stations were selected carefully along a profile in the study area and were positioned us...
ABSTRACT Crop production has continued to decline in sub-Saharan Africa due to soil infertility and increased cost of farm inputs. To enhance food security, farmers have adopted the use of both inorganic and organic fertilizers on their farms. The production and use of inorganic chemical fertilizers are not only expensive for family farming systems but also contribute significantly to environmental pollution. Biological nitrogen fixation using rhizobia has proven to be a cost-effective and en...
ABSTRACT The action of the symmetric group Sn on ordered subsets from the set X 1, 2, , n is an aspect that seems to have received little attention for a long time. Most studies have focused on the action of n S on unordered subsets leaving many properties about its action on ordered subsets unknown. This research is set to determine the rank and subdegrees of n S acting on r X , the set of all ordered r-element subsets from X. Particular cases when r 2, 3 and 4 have b...
ABSTRACT Malnutrition is one of the main factors that contribute significantly to health status mortality and general wellbeing of elderly people. The elderly have a greater risk of malnutrition due to high morbidity rate, lack of care and support, loss of muscle mass that normally come with ageing and physiological changes that derail intake of food, digestion, nutrients absorption and metabolism. Physical disabilities also interfere with their ability to look for and prepare food. For any ...
ABSTRACT There is growing awareness about the efficacy of essential elements in the maintenance of good health and prevention of diseases. Zinc plays a vital role in wound healing, immune system, reproductive system and nervous system. Zinc wades off oxygen free radicals and also aid in metabolism of carbohydrates by assisting insulin to function. Chromium lowers blood sugar and also works with insulin in metabolization of sugar, while copper is required for conversion of body’s Fe into ha...
ABSTRACT Over years, it has been reported that long term exposure of heavy metals such as mercury(Hg), lead (Pb) and cadmium (Cd) would result into numerous dangers among these; being carcinogenic, sterility and behavioural abnormalities. While there are various sources of heavy metals, both herbal (those made from Aloe vera, neem and olive oil among others) and synthetic cosmetics and toiletries are equally feared as, would be sources especially if levels are above those set by the World He...
ABSTRACT The malaria vector Anopheles gambiae sensu stricto remains one of the principal malaria transmission vectors in developing countries, particularly within the tropics and sub-Saharan Africa. Current methods of control are based on synthetic chemical insecticides, but these are costly and inaccessible by poor communities, and large-scale use leads to vector resistance and toxicity to beneficial non-target organisms. Plant-based products have been used for generations in traditional pra...