My name is Eshet Lakew Tesfaye Researcher and Lecturer at Hawassa University, Ethiopia in the department of Biotechnology. I graduated with my BSc. degree in 2012 at the University of Gondar in the Department of Biotechnology. I also attended my MSc. degree in Industrial Biotechnology at Addis Ababa University, Institute of Biotechnology in 2017. Phone: +251-918037824 Address: Hawassa, Ethiopia
Drought and salinity pose significant challenges to global agriculture by reducing crop yields. T... more Drought and salinity pose significant challenges to global agriculture by reducing crop yields. This study investigated the combined effects of drought and salt stress on the four malt barley (H. vulgare) strains, evaluating their resistance to different stress levels. Three sets of experiments used polyethylene glycol (PEG 6000) for drought stress (4%, 8%, and 12% w/v) and NaCl for salt stress (40 mM, 80 mM, and 120 mM). The control was made of distilled water. Barley strains with accession numbers (215460, 64,167, 16,805, and 202,642) exhibited varying degrees of tolerance. Notably, the Boreda strain (64,167) displayed strong resilience, while the Kosha strain (215460) showed weak tolerance. Germination percentages varied, with some non-combination stress conditions resembling controls. Overall, Boreda (64,167) emerged as a promising H. vulgare strain with potential for production despite dual stress conditions, showcasing its resilience to drought and salinity.
Increased innovation on finding new ways to generate energy from different sources to meet the gr... more Increased innovation on finding new ways to generate energy from different sources to meet the growing demand of consumers has led to various challenges in controlling the power network when it faces different disruptions. To address these challenges, a new approach has been proposed in this research paper, which combines a controller with a soft computing technique called Particle Swarm Optimization (PSO). The study considers a power system with four units, where three different energy sources are utilized and distributed across two areas. Each area has two power sources, with one area having a combination of thermal and gas power plants, and the other area consisting of a nuclear power plant and a gas power plant. Transmitting power from the nuclear power plant is particularly complex due to its high sensitivity to disturbances. Therefore, an intelligent and efficient controller is needed to ensure robust control in this type of power network that includes nuclear power. The paper also conducts a thorough analysis of the harmful emissions associated with electricity generation from the different power plants considered. The goal is to reduce the carbon footprint associated with power generation. The proposed work and analysis in the paper are implemented using the MATLAB/SIMULINK environment.
Drought and salinity pose significant challenges to global agriculture by reducing crop yields. T... more Drought and salinity pose significant challenges to global agriculture by reducing crop yields. This study investigated the combined effects of drought and salt stress on the four malt barley (H. vulgare) strains, evaluating their resistance to different stress levels. Three sets of experiments used polyethylene glycol (PEG 6000) for drought stress (4%, 8%, and 12% w/v) and NaCl for salt stress (40 mM, 80 mM, and 120 mM). The control was made of distilled water. Barley strains with accession numbers (215460, 64,167, 16,805, and 202,642) exhibited varying degrees of tolerance. Notably, the Boreda strain (64,167) displayed strong resilience, while the Kosha strain (215460) showed weak tolerance. Germination percentages varied, with some non-combination stress conditions resembling controls. Overall, Boreda (64,167) emerged as a promising H. vulgare strain with potential for production despite dual stress conditions, showcasing its resilience to drought and salinity.
Asian Journal of Advances in Agricultural Research, 2022
Garlic (Allium sativium L.) is the major food and cash crop in the highland regions of Ethiopia. ... more Garlic (Allium sativium L.) is the major food and cash crop in the highland regions of Ethiopia. However, farmers are not integrated into the garlic breeding process. The objectives of this assessment were to identify farmers' key garlic production constraints and establish preferred traits in garlic cultivar development in the two woredas of Sidama Region (Ethiopia). A participatory rural appraisal (PRA) study was conducted through a structured survey involving 36 households in Malga and Gorche woredas. A structured survey used a questionnaire which was administered to farmers to collect information on key production constraints, varieties of garlic seed used for production, seed source etc., according to the assessment result of this study, the cultivar used for garlic production is the local variety in the two woredas. Hence, the most important garlic production constraints are lack of high yielding cultivars, garlic disease and insects. To conclude active farmer participation in early breeding stages is critical for a successful garlic breeding program. Based on the assessment it is possible to recommend that high yielder garlic variety,
Background Yeasts are the best leavening agents that principally break down sugars of the flour i... more Background Yeasts are the best leavening agents that principally break down sugars of the flour into carbon dioxide and ethanol. Therefore, the present study was carried out to characterize the indigenous yeast isolates recovered from fruits. The indigenous yeast isolates were retrieved from fruits following standard methods. Results From a total of 88 yeast isolates, three of them were selected on the basis of not producing H2S and their high sugar fermentation abilities. Based on colonial, morphological parameters and biochemical tests, the three yeast isolates were identified as members of the genus Saccharomyces. The optimum growth pH and temperature values for the three selected yeast isolates were recorded as 5 and 30oC, respectively in Yeast Extract Peptone Dextrose medium. The results indicated that 30% (w/v) D-glucose and 5% (w/v) NaCl concentrations supported optimum growth of the isolates in the same medium. In all cases, the maximum biomass was achieved at 96 hrs of incu...
A Thesis Submitted to the School of Graduate Studies, Addis Ababa University in Partial Fulfillme... more A Thesis Submitted to the School of Graduate Studies, Addis Ababa University in Partial Fulfillment of the Requirement for the Degree of Master of Science in Biotechnology
Drought and salinity pose significant challenges to global agriculture by reducing crop yields. T... more Drought and salinity pose significant challenges to global agriculture by reducing crop yields. This study investigated the combined effects of drought and salt stress on the four malt barley (H. vulgare) strains, evaluating their resistance to different stress levels. Three sets of experiments used polyethylene glycol (PEG 6000) for drought stress (4%, 8%, and 12% w/v) and NaCl for salt stress (40 mM, 80 mM, and 120 mM). The control was made of distilled water. Barley strains with accession numbers (215460, 64,167, 16,805, and 202,642) exhibited varying degrees of tolerance. Notably, the Boreda strain (64,167) displayed strong resilience, while the Kosha strain (215460) showed weak tolerance. Germination percentages varied, with some non-combination stress conditions resembling controls. Overall, Boreda (64,167) emerged as a promising H. vulgare strain with potential for production despite dual stress conditions, showcasing its resilience to drought and salinity.
Increased innovation on finding new ways to generate energy from different sources to meet the gr... more Increased innovation on finding new ways to generate energy from different sources to meet the growing demand of consumers has led to various challenges in controlling the power network when it faces different disruptions. To address these challenges, a new approach has been proposed in this research paper, which combines a controller with a soft computing technique called Particle Swarm Optimization (PSO). The study considers a power system with four units, where three different energy sources are utilized and distributed across two areas. Each area has two power sources, with one area having a combination of thermal and gas power plants, and the other area consisting of a nuclear power plant and a gas power plant. Transmitting power from the nuclear power plant is particularly complex due to its high sensitivity to disturbances. Therefore, an intelligent and efficient controller is needed to ensure robust control in this type of power network that includes nuclear power. The paper also conducts a thorough analysis of the harmful emissions associated with electricity generation from the different power plants considered. The goal is to reduce the carbon footprint associated with power generation. The proposed work and analysis in the paper are implemented using the MATLAB/SIMULINK environment.
Drought and salinity pose significant challenges to global agriculture by reducing crop yields. T... more Drought and salinity pose significant challenges to global agriculture by reducing crop yields. This study investigated the combined effects of drought and salt stress on the four malt barley (H. vulgare) strains, evaluating their resistance to different stress levels. Three sets of experiments used polyethylene glycol (PEG 6000) for drought stress (4%, 8%, and 12% w/v) and NaCl for salt stress (40 mM, 80 mM, and 120 mM). The control was made of distilled water. Barley strains with accession numbers (215460, 64,167, 16,805, and 202,642) exhibited varying degrees of tolerance. Notably, the Boreda strain (64,167) displayed strong resilience, while the Kosha strain (215460) showed weak tolerance. Germination percentages varied, with some non-combination stress conditions resembling controls. Overall, Boreda (64,167) emerged as a promising H. vulgare strain with potential for production despite dual stress conditions, showcasing its resilience to drought and salinity.
Asian Journal of Advances in Agricultural Research, 2022
Garlic (Allium sativium L.) is the major food and cash crop in the highland regions of Ethiopia. ... more Garlic (Allium sativium L.) is the major food and cash crop in the highland regions of Ethiopia. However, farmers are not integrated into the garlic breeding process. The objectives of this assessment were to identify farmers' key garlic production constraints and establish preferred traits in garlic cultivar development in the two woredas of Sidama Region (Ethiopia). A participatory rural appraisal (PRA) study was conducted through a structured survey involving 36 households in Malga and Gorche woredas. A structured survey used a questionnaire which was administered to farmers to collect information on key production constraints, varieties of garlic seed used for production, seed source etc., according to the assessment result of this study, the cultivar used for garlic production is the local variety in the two woredas. Hence, the most important garlic production constraints are lack of high yielding cultivars, garlic disease and insects. To conclude active farmer participation in early breeding stages is critical for a successful garlic breeding program. Based on the assessment it is possible to recommend that high yielder garlic variety,
Background Yeasts are the best leavening agents that principally break down sugars of the flour i... more Background Yeasts are the best leavening agents that principally break down sugars of the flour into carbon dioxide and ethanol. Therefore, the present study was carried out to characterize the indigenous yeast isolates recovered from fruits. The indigenous yeast isolates were retrieved from fruits following standard methods. Results From a total of 88 yeast isolates, three of them were selected on the basis of not producing H2S and their high sugar fermentation abilities. Based on colonial, morphological parameters and biochemical tests, the three yeast isolates were identified as members of the genus Saccharomyces. The optimum growth pH and temperature values for the three selected yeast isolates were recorded as 5 and 30oC, respectively in Yeast Extract Peptone Dextrose medium. The results indicated that 30% (w/v) D-glucose and 5% (w/v) NaCl concentrations supported optimum growth of the isolates in the same medium. In all cases, the maximum biomass was achieved at 96 hrs of incu...
A Thesis Submitted to the School of Graduate Studies, Addis Ababa University in Partial Fulfillme... more A Thesis Submitted to the School of Graduate Studies, Addis Ababa University in Partial Fulfillment of the Requirement for the Degree of Master of Science in Biotechnology
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