Environmental & Physical Sciences

Research Papers/Topics in Environmental & Physical Sciences

Positron-Impact Excitation Of The Lowest Autoionizing State In Rubidium Atom Using Distorted Wave Method

 ABSTRACTMany calculations on atomic collisions and scattering processes have been performed on electronimpact excitation of the lowest autoionizing state of rubidium, but not much attempt has beenmade with positron impact which is of equally fundamental importance and is receiving attentionnowadays with the availability of improved positron beam experiments. So, in this study, totalcross-sections, differential cross-sections, lambda parameter, R parameter and the alignmentparam...

Assessment Of Climate Change Impacts On Natural Resources And The Different Gender Among The Pastoralist Communities Of Samburu, Kenya

ABSTRACTClimate change due to anthropogenic induced global warming is one of the greatest anddefining challenges of the current and future centuries. The Intergovernmental Panel onClimate Change (IPGC) has unequivocally affirmed it and directly linked it toanthropogenic Green-House Gases (GHGs) emissions from fossil fuel burning and landuse changes. Although the impacts of climate change are global, they will be differentlyfelt and distributed among different regions, generations, age c...

Evaluation Of The Effectiveness Of Adult Mosquito Sampling Methods In Three Ecological Habitats In Kwale County In South Coast, Kenya

ABSTRACT Malaria and lymphatic filariasis transmission along the coastal strip of Kenya is endemic. The predominant mosquito vectors of human malaria include Anopheles gambiae s.l. and Anopheles funestus. The same mosquitoes transmit lymphatic filariasis with an added role for Culex quinquefasciatus. Current control strategies for anthropophagic mosquitoes largely involve methods that sample for adult mosquitoes inside human dwellings before they are implemented. Despite the intensive ...

Relationship Between Socio-Economic Exclusion And Community Based Waste Management Practices In Kibera Informal Settlements, Nairobi County, Kenya

ABSTRACTOne of the greatest environmental challenges in the 21st century is ensuring successful implementation of participatory community based waste management practices in cities particularly in slums and informal settlements. This study aimed at investigating the relationship between socio-economic exclusion and community based waste management practices in Kibera informal settlements, Nairobi County. To achieve the study objectives this study was guided by Marxist theoretical framework on...

Impacts Of Water Hyacith On The Fishing Industry At The Winam Gulf, Kisumu County

ABSTRACTFresh water bodies constitute a vital component of a wide variety of living environments as integral water resource base in many human societies in the world. Water hyacinth has invadedFreshwater systems in over 50 countries on five continents and changes to its density have the potential to affect other ecological and human communities in areas where it is established either positively or negatively. The hyacinth, since its introduction in Kenya, has been a menace to the riparian com...

Influence Of Aquaculture Development On Fish Pond Water Quality And Livelihoods Of Fish Farmers In Gatundu, Kiambu County

ABSTRACTA growing fish demand in Kenya, coupled with Government support from theGovernment has seen an upsurge in the aquaculture sub-sector. The Government’sEconomic Stimulus Programme (ESP) has been the main boost to Aquaculturedevelopment in the country. Despite the high growth, there is inadequate information onimpact of the growth in aquaculture on water quality and livelihoods. The main objectiveof this study therefore was to establish the quality of water in the fish ponds and ...

The Performance Of Selected Tree Species In The Rehabilitation Of A Limestone Quarry At East African Portland Cement Company Land, Athi River, Kenya

ABSTRACTQuarrying for limestone is an economic necessity that is not only hazardous to human but also one that invariably has deleterious effect on the environment. Information on the performance of trees species is important as plants are key in the revegetation of exhausted quarries. A comparison of field performance of Acacia xanthophloea, Schinus molle, Casuarina equisetifolia and Grevillea robusta was made in an exhausted limestone quarry, backfilled with limestone mine waste, in a semi-...

Influence Of Fish Trade Activities On The Environment In Gikomba Fish Market, Nairobi County, Kenya

ABSTRACTPost-harvest fisheries activities have been cited as contributors to environmental degradation. The current sanitary situation in urban fish markets is worrying and present threats to the public health and the surrounding environment. The research aimed to investigate and understand how the fish trader’s activities influence the environmental situation in fish markets. A descriptive survey design was used for the research. The target for the study was the fish traders of Gikomba fis...

Oil And Gas Exploration And Sustainable Environmental Management In Oil Block 13t South Lokichar Basin, Turkana County, Kenya

ABSTRACTCommercial oil and gas was discovered in Kenya in 2012. Few academic studies have been done on the effects of the mentioned discovery to the environment.The oil and gas resources are expected to transform the economic wellbeing of the locals and the nation at large.However,land degradation, environmental pollution and socio-economic problems have always ensued oil and gas exporation ventures globally.This study aimed at determining the effects of oil and gas exploration on biophysical...

Challenges And Opportunities Of Indigenous Bamboo And Its Environmental Conservation In Kieni Forest, Gakoe Location Of Kiambu County, Kenya

ABSTRACTYushania alpina formerly known as Arundinaria alpina is the only species of native bamboo indigenous forests in Kenya. It plays an integral part in the indigenous forests in which it occurs. Bamboo is a fast growing, renewable, widespread, low cost, environment enhancing resource with great potential in environmental conservation and poverty alleviation. The lack of rules surrounding bamboo exploitation in Kenya has resulted in unsustainable harvesting and utilization of bamboo. There...

Diversity And Abundance Of Bees And Their Effect On Yield Of French Beans, Adjacent Mt Kenya Forest In Laikipia County

ABSTRACTFrench bean (Phaseolus vulgaris L.) is an important crop with high impact on ruralemployment and livelihood. In Kenya, the crop is grown for export by small scalefarmers in high potential areas of Central, Rift valley and Western regions. Theseregions are densely populated leading to intensive farming and land fragmentation,which research has reported to be among the major threats of bee pollinators.However, amongst the known constraints, pollination has not featured amidst many...

Lime, Manure And Inorganic Fertilizer Effects On Soil Chemical Properties, Maize Yield And Profitability In Tharaka-Nithi County, Kenya

ABSTRACTIn Sub-Saharan Africa, acidic soils occupy 29% of the total area, while about 13% of the Kenyan total land area has acidic soils, widely distributed in croplands of the central regions. The high soil acidity coupled with soil nutrient depletion negatively affect performance and yields of maize in the region. This study was therefore carried out at Kirege in Tharaka Nithi County for two cropping seasons; short rains (SR) in 2016 and long rains (LR) in 2017 to determine the effects of m...

Mechanical Properties And Thermal Degradation Of Bitumen-Acacia Sap Composites

ABSTRACTThe rapid increase in traffic intensity, axle loading, rigorous climatic changes and commercial road transport continues to impose severe demands of load and environment on the highway system. Bitumen mostly used as a binder for road construction, waterproofing agent, coating, and insulation among others has poor mechanical and thermal properties. Different synthetic binder modifies that are being used to improved performance lead to environmental pollution during disposal. Therefore,...

Phytoremediation Potential of Cyperus Alternifolius, Cyperus Dives and Canna Indica in Flamingo Farm Constructed Wetland, Naivasha Sub-County, Kenya

ABSTRACTContamination of fresh water sources with heavy metals found within the agricultural areas is largely contributed by amongst other factors, application of inorganic fertilizers and pesticides. Removal of heavy metals from the contaminated waters using conventional methods is cost prohibitive and more importantly less effective especially when concentration of heavy metals is low. As a result, use of alternative technologies such as phytoremediation is being promoted. Phytoremediation ...

Human Population Growth And Its Implications On The Use And Trends Of Land Resources In Migori County, Kenya

ABSTRACTThe world population was at 7.3 billion people in 2015, and is projected to reach 9.7 billion in 2050 and 11.2 billion people in 2100. Population in the developing countries which Kenya is part of is expected to rise from 5.9 billion in 2013 to 8.2 billion in 2050 to 9.6 billion in 2100. Increasing human population and the threats posed by climate change continue to put pressure on the already limited environmental resources that support life on earth. This is evident in the case of l...


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