DSpace Collection:
http://41.89.96.81:8080/xmlui/handle/123456789/2540
2024-03-28T08:39:00ZKnowledge and Awareness Determinants of Renewable Energy Technologies: A Cross Sectional Study of Rural Residents from Njoro Constituency, Nakuru County, Kenya
http://41.89.96.81:8080/xmlui/handle/123456789/3303
Title: Knowledge and Awareness Determinants of Renewable Energy Technologies: A Cross Sectional Study of Rural Residents from Njoro Constituency, Nakuru County, Kenya
Authors: Kimani, Martin Njoroge; Makindi, Stanley Maingi; Aboud, Abdillahi A.
Abstract: Background:Awareness to renewable energy technologies (RET) can have multiple positive effects as it can be a precursor to greater RET adoption levels as well as promotion of the same. The aim of this study was to assess the level of awareness of rural residents of Njoro constituency to the different renewable energy technologiesas a precursor to their adoption. Materials and Methods: The study was based on primary data collected through personal interviews with household heads in Njoro constituency, Nakuru County, Kenya. Two stage cluster random sampling was used to select the 200 households. The results showed that majority of the respondents exhibited a moderate level of knowledge and awareness to RETs. Results:Results of the study indicated that gender and education level had a significant effect on knowledge and awareness. It was also found that age and social-economic status did not have significant effect on the knowledge and awareness. Conclusion:The overall finding of the study underlined the high importance in strengthening communication to enhance knowledge and awareness of renewable energy technologies. The findings of this study will be significant to planners, policy makers, researchers and individuals to build the case for proactive promotion of RETS. Key Word:Knowledge and awareness; renewable energy technologies; rural househol2020-09-01T00:00:00ZSocio-Economic Determinants of Land Use/Cover Change in Wetlands in East Africa: A Case Study Analysis of
http://41.89.96.81:8080/xmlui/handle/123456789/3059
Title: Socio-Economic Determinants of Land Use/Cover Change in Wetlands in East Africa: A Case Study Analysis of
Authors: Ondiek, Risper; Vuolo, Francesco; Kipkemboi, Julius; Kitaka, Nzula; Lautsch, Erwin; Hein, Thomas; Schmid, Erwin
Abstract: In East Africa, wetlands are steadily converted to agriculture for food security reasons. This study analyzed high spatial resolution panchromatic and color photographs in the Anyiko wetland in Kenya to reveal wetland conversions between 1966 and 2018. In addition, socio-economic determinants of land use/cover change are assessed in the Anyiko wetland. Socio-economic data was collected through a questionnaire survey of 226 households. A Chi-squared Automatic Interaction Detector (OHAID) decision tree approach is utilized to assess determinants of wetlands conversion. The results showed that between 1966 and 2018, the wetland area reduced by 55%, mostly attributed to agricultural development. Households were more likely to cultivate the wetland it they did not harvest papyrus for artisanal products, were male-headed and lacked alternative sources of income. The perceptions that wetland is “wasteland” and conversion to agriculture provides higher net monetary benefit did not influence wetland cultivation. Hence, the conversion oi the wetland was determined by the socio-economic status of the households rather than perceptions on its value. Keywords: CORONA, ecosystem services, agriculture, livelihoods, wetlands2020-01-01T00:00:00ZChemical characterization of Kenyan Cupressus lusitanica Mill. Ocimum americanum L. and Lippia Javanica(Burm.f.) Spreng essential oils
http://41.89.96.81:8080/xmlui/handle/123456789/3058
Title: Chemical characterization of Kenyan Cupressus lusitanica Mill. Ocimum americanum L. and Lippia Javanica(Burm.f.) Spreng essential oils
Authors: Ogendo, Joshua; Bett, Philip; Matasyoh, Josphat; Kiplagat, Ann
Abstract: The study was designed to chemically characterize essential oils from Kenyan Cupressus Iusitanica, Ocimum americanum and Lippia javanica and bio-prospect for new compounds as possible biocontrol agents of insect pests. Leaf essential oils of the three test plants were obtained by hydro-distillation. GC-MS analysis of leaf oils revealed that monoterpenes were the major group of chemical constituents in all plants. In C. Iusitanica oil, 91 compounds were identified with oi-pinene (13.8%), umbellulone (12.66%), 6- cadinene (7.47) and Limonene (6.64%) being major compounds. The O. americanum oil had 72 compounds with geraniol (18.72%), 1, 8- cineole (17.48%), elemicin (8.20%) and camphor (7.55%) being main chemical constituents. Results also in L. javanica oil, the 47 compounds identified were dominated by ipsdienone (26.07 %), ocimenone (14.32%), bicyclo [3.1.1] hept-3-en-2-one, 4,6,6-trimethyI- , (1S)-(10.91%) and myrcene (7.04%). The chemotypes of essential oils from the tested plants may be considered as or-pinene-umbellulone, geranial-1, 8-cineole and ipsdienone-ocimenone for C. Iusitanica, O. americanicum and L. javanica respectively. The chemical constituents such as or-pinene, umbellulone, geraniol, 1, 8-cineole and myrcene are known to have insecticidal properties. Therefore, the essential oils have possible uses in production of natural pesticides of plant origin for sustainable management of insect pest. Key words: Essential oil, Cupressus Iusitanica, Ocimum americanum, Lippiajavanica, botanical pesticide2022-02-01T00:00:00ZSeasonal and Longitudinal Variations of Water Quality in an Urban Stream: Case Study of Sosiani River Uasin Gishu County, Kenya
http://41.89.96.81:8080/xmlui/handle/123456789/3053
Title: Seasonal and Longitudinal Variations of Water Quality in an Urban Stream: Case Study of Sosiani River Uasin Gishu County, Kenya
Authors: Edward, J; Masakha, Wilkister; Moturi, N; George, M. Ogendi
Abstract: The study sought to analyse longitudinal and seasonal variations in physico-chemical properties of water quality in Sosiani River in Eldoret town, Kenya. An experimental design was used to collect water samples upstream midstream and downstream of Eldoret town for a period of one year during the dry and wet seasons. Samples were collected from effluent discharge points in accordance with APHA, 2012 water sampling procedures. Sosiani River exhibited significant variation in physico-chemical water parameters along the river and during rainy seasons. TSS varied significantly across the river at F: 185.52 P < 0.001 and during the wet season (P< 0.045). TDS varied significantly along the river (F: 59.0129 at p<0.001) with a significant positive correlation at P< 0.001 during wet season. Turbidity varied significantly along the sampling points F= 32.41 P< 0,001 and varied significantly p<0.028 during the rainy season. BOD varied significantly along the river (F: 78.95 & P < 0.001) with a significant positive correlation P<0.038 during the rainy season. COD varied significantly along the river (F=77.64 & P<0.00l) and during wet season. Water temperature varied significantly along the river (F=l85.52, p<0.00l) and with the onset of the rainy season (P<0.0l3). Water pH varied significantly along the sampling points (F: 159.85 & P <0.00l). However, pH did not vary significantly during the wet season (P<0.6l6). This river is polluted, turbid with low dissolved oxygen and high BOD hence not suitable for aquatic life. However the water quality improves downstream perhaps due to self cleansing ability of the river. Hence the water is not suitable for human consumption and or recreation purposes. The water should be treated and municipal effluent channelled into effluent treatment works for pre-treatment. Keywords: Sosiani River, physicochemical water quality, seasonal and longitudinal variations2017-01-01T00:00:00Z