The Experts below are selected from a list of 101274 Experts worldwide ranked by ideXlab platform
Patricia Guardabassi - One of the best experts on this subject based on the ideXlab platform.
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the sustainability of Ethanol Production from sugarcane
Energy Policy, 2008Co-Authors: Jose Goldemberg, Suani Teixeira Coelho, Patricia GuardabassiAbstract:The rapid expansion of Ethanol Production from sugarcane in Brazil has raised a number of questions regarding its negative consequences and sustainability. Positive impacts are the elimination of lead compounds from gasoline and the reduction of noxious emissions. There is also the reduction of CO2 emissions, since sugarcane Ethanol requires only a small amount of fossil fuels for its Production, being thus a renewable fuel. These positive impacts are particularly noticeable in the air quality improvement of metropolitan areas but also in rural areas where mechanized harvesting of green cane is being introduced, eliminating the burning of sugarcane. Negative impacts such as future large-scale Ethanol Production from sugarcane might lead to the destruction or damage of high-biodiversity areas, deforestation, degradation or damaging of soils through the use of chemicals and soil decarbonization, water resources contamination or depletion, competition between food and fuel Production decreasing food security and a worsening of labor conditions on the fields. These questions are discussed here, with the purpose of clarifying the sustainability aspects of Ethanol Production from sugarcane mainly in Sao Paulo State, where more than 60% of Brazil's sugarcane plantations are located and are responsible for 62% of Ethanol Production.
Jose Goldemberg - One of the best experts on this subject based on the ideXlab platform.
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the sustainability of Ethanol Production from sugarcane
Energy Policy, 2008Co-Authors: Jose Goldemberg, Suani Teixeira Coelho, Patricia GuardabassiAbstract:The rapid expansion of Ethanol Production from sugarcane in Brazil has raised a number of questions regarding its negative consequences and sustainability. Positive impacts are the elimination of lead compounds from gasoline and the reduction of noxious emissions. There is also the reduction of CO2 emissions, since sugarcane Ethanol requires only a small amount of fossil fuels for its Production, being thus a renewable fuel. These positive impacts are particularly noticeable in the air quality improvement of metropolitan areas but also in rural areas where mechanized harvesting of green cane is being introduced, eliminating the burning of sugarcane. Negative impacts such as future large-scale Ethanol Production from sugarcane might lead to the destruction or damage of high-biodiversity areas, deforestation, degradation or damaging of soils through the use of chemicals and soil decarbonization, water resources contamination or depletion, competition between food and fuel Production decreasing food security and a worsening of labor conditions on the fields. These questions are discussed here, with the purpose of clarifying the sustainability aspects of Ethanol Production from sugarcane mainly in Sao Paulo State, where more than 60% of Brazil's sugarcane plantations are located and are responsible for 62% of Ethanol Production.
Lilly M. Saleena - One of the best experts on this subject based on the ideXlab platform.
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Genetic engineering of Clostridium thermocellum DSM1313 for enhanced Ethanol Production.
BMC Biotechnology, 2016Co-Authors: Saranyah Kannuchamy, Nisha Mukund, Lilly M. SaleenaAbstract:Background The twin problem of shortage in fossil fuel and increase in environmental pollution can be partly addressed by blending of Ethanol with transport fuel. Increasing the Ethanol Production for this purpose without affecting the food security of the countries would require the use of cellulosic plant materials as substrate. Clostridium thermocellum is an anaerobic thermophilic bacterium with cellulolytic property and the ability to produce Ethanol. But its application as biocatalyst for Ethanol Production is limited because pyruvate ferredoxin oxidoreductase, which diverts pyruvate to Ethanol Production pathway, has low affinity to the substrate. Therefore, the present study was undertaken to genetically modify C. thermocellum for enhancing its Ethanol Production capacity by transferring pyruvate carboxylase (pdc) and alcohol dehydrogenase (adh) genes of the homoEthanol pathway from Zymomonas mobilis.
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Genetic engineering of Clostridium thermocellum DSM1313 for enhanced Ethanol Production
BMC Biotechnology, 2016Co-Authors: Saranyah Kannuchamy, Nisha Mukund, Lilly M. SaleenaAbstract:Background The twin problem of shortage in fossil fuel and increase in environmental pollution can be partly addressed by blending of Ethanol with transport fuel. Increasing the Ethanol Production for this purpose without affecting the food security of the countries would require the use of cellulosic plant materials as substrate. Clostridium thermocellum is an anaerobic thermophilic bacterium with cellulolytic property and the ability to produce Ethanol. But its application as biocatalyst for Ethanol Production is limited because pyruvate ferredoxin oxidoreductase, which diverts pyruvate to Ethanol Production pathway, has low affinity to the substrate. Therefore, the present study was undertaken to genetically modify C. thermocellum for enhancing its Ethanol Production capacity by transferring pyruvate carboxylase ( pdc ) and alcohol dehydrogenase ( adh ) genes of the homoEthanol pathway from Zymomonas mobilis. Results The pdc and adh genes from Z. mobilis were cloned in pNW33N, and transformed to Clostridium thermocellum DSM 1313 by electroporation to generate recombinant CTH- pdc, CTH- adh and CTH- pdc-adh strains that carried heterologous pdc , adh , and both genes, respectively. The plasmids were stably maintained in the recombinant strains. Though both pdc and adh were functional in C. thermocellum , the presence of adh severely limited the growth of the recombinant strains, irrespective of the presence or absence of the pdc gene. The recombinant CTH- pdc strain showed two-fold increase in pyruvate carboxylase activity and Ethanol Production when compared with the wild type strain. Conclusions Pyruvate decarboxylase gene of the homoEthanol pathway from Z mobilis was functional in recombinant C. thermocellum strain and enhanced its ability to produced Ethanol. Strain improvement and bioprocess optimizations may further increase the Ethanol Production from this recombinant strain.
N. Seetharama - One of the best experts on this subject based on the ideXlab platform.
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Study on genotypic variation for Ethanol Production from sweet sorghum juice
Biomass and Bioenergy, 2010Co-Authors: C.v. Ratnavathi, K. A. Suresh, B.s. Vijay Kumar, M. Pallavi, V.v. Komala, N. SeetharamaAbstract:Abstract Sugarcane molasses is the main source for Ethanol Production in India. Sweet sorghum with its juicy stem containing sugars equivalent to that of sugarcane is a very good alternative for bio-Ethanol Production to meet the energy needs of the country. Sweet sorghum is drought resistant, water logging resistant and saline–alkaline tolerant. Growing sweet sorghum for Ethanol Production is relatively easy and economical and Ethanol produced from sweet sorghum is eco-friendly. In view of this, it is important to identify superior genotypes for Ethanol Production in terms of percent juice brix, juice extractability, total fermentable sugars, Ethanol yield and fermentation efficiency. This paper presents the study on the variability observed for the Production of Ethanol by various sweet sorghum genotypes in a laboratory fermentor. Five Sweet Sorghum ( Sorghum bicolor L. Moench) genotypes were evaluated for Ethanol Production from stalk juice (Keller, SSV 84, Wray, NSSH 104 and BJ 248). Sweet sorghum juice differs from cane juice mainly in its higher content of starch and aconitic acid. Data were collected for biomass yield; stalk sugar yield and Ethanol Production in five genotypes. Maximum Ethanol Production of 9.0%w/v Ethanol was obtained with Keller variety (20% sugar concentration was used), and decreased for other genotypes. A distiller's strain of Saccharomyces cerevisiae (gifted by Seagram Distilleries Ltd.) was employed for fermentation. The fermentation efficiency (FE) was 94.7% for this strain. High biomass of yeast was obtained with BJ 248 variety. When the similar experiments were conducted with unsterile sweet sorghum juice (15% sugar concentration) 6.47%w/v Ethanol was produced.
Suani Teixeira Coelho - One of the best experts on this subject based on the ideXlab platform.
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the sustainability of Ethanol Production from sugarcane
Energy Policy, 2008Co-Authors: Jose Goldemberg, Suani Teixeira Coelho, Patricia GuardabassiAbstract:The rapid expansion of Ethanol Production from sugarcane in Brazil has raised a number of questions regarding its negative consequences and sustainability. Positive impacts are the elimination of lead compounds from gasoline and the reduction of noxious emissions. There is also the reduction of CO2 emissions, since sugarcane Ethanol requires only a small amount of fossil fuels for its Production, being thus a renewable fuel. These positive impacts are particularly noticeable in the air quality improvement of metropolitan areas but also in rural areas where mechanized harvesting of green cane is being introduced, eliminating the burning of sugarcane. Negative impacts such as future large-scale Ethanol Production from sugarcane might lead to the destruction or damage of high-biodiversity areas, deforestation, degradation or damaging of soils through the use of chemicals and soil decarbonization, water resources contamination or depletion, competition between food and fuel Production decreasing food security and a worsening of labor conditions on the fields. These questions are discussed here, with the purpose of clarifying the sustainability aspects of Ethanol Production from sugarcane mainly in Sao Paulo State, where more than 60% of Brazil's sugarcane plantations are located and are responsible for 62% of Ethanol Production.