Clostridium Acetobutylicum
Mostrando 1-12 de 185 artigos, teses e dissertações.
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1. Biotechnological potential of Clostridium butyricum bacteria
In response to demand from industry for microorganisms with auspicious biotechnological potential, a worldwide interest has developed in bacteria and fungi isolation. Microorganisms of interesting metabolic properties include non-pathogenic bacteria of the genus Clostridium, particularly C. acetobutylicum, C. butyricum and C. pasteurianum. A well-known prope
Braz. J. Microbiol.. Publicado em: 2014-09
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2. Influência da concentração de substrato e da temperatura na produção de hidrogênio a partir de vinhaça de cana-de-açúcar / Influence of substrate concentration and temperature on hydrogen production from vinasse cane sugar
O presente estudo teve como principal objetivo avaliar a produção de hidrogênio a partir de diferentes concentrações de vinhaça de cana-de-açúcar a 370°C e 55°C. Além disso, os consórcios microbianos mesófilo e termófilo utilizados nos ensaios em reatores em batelada foram caracterizados por meio da técnica de clonagem e sequenciamento do gene
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2012
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3. Diversity and characterization of ramie-degumming strains
Ramie (Boehmeria nivea and Boehmeria tenacissima) is a widely used fiber crop. Traditional water retting or chemical boiling method performed in order to extract ramie fiber seriously pollute the environment and severely damage the fiber, so biological method is the general trend of the fiber-extracting industry. Some strains (687), involving 26 genera and 4
Scientia Agricola. Publicado em: 2012-04
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4. Efeito da concentração inicial da água residual do processamento da mandioca na produção de biohidrogênio por Clostridium acetobutylicum ATCC 824
Devido à vasta biodiversidade encontrada em seu território, o Brasil dispõe de uma grande variedade de resíduos agrícolas e agroindustriais, cujo bioprocessamento é de grande interesse econômico e social. É importante fomentar a demonstração das vantagens existentes e encorajar o investimento no desenvolvimento de novas tecnologias para se obter ga
Publicado em: 2009
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5. Heterologous expression of endo-beta-1,4-D-glucanase from Clostridium cellulovorans in Clostridium acetobutylicum ATCC 824 following transformation of the engB gene.
Heterologous expression of the Clostridium cellulovorans engB gene by Clostridium acetobutylicum BKW-1 was detected as zones of hydrolysis on carboxymethyl cellulose (CMC) Trypticase glucose yeast plates stained with Congo red. The extracellular cellulase preparation from C. acetobutylicum BKW-1 has a specific activity towards CMC which is more than fourfold
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6. Clostridium acetobutylicum Protoplast Formation and Regeneration
Techniques and media for the production and regeneration of stable Clostridium acetobutylicum protoplasts are described.
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7. Effect of butanol on lipid composition and fluidity of Clostridium acetobutylicum ATCC 824.
Butanol, at sub-growth-inhibitory levels, caused a ca. 20 to 30% increase in fluidity of lipid dispersions from Clostridium acetobutylicum. When grown in the presence of butanol or into stationary phase, C. acetobutylicum synthesized increased levels of saturated acyl chains at the expense of unsaturated chains.
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8. Membrane H+ Conductance of Clostridium thermoaceticum and Clostridium acetobutylicum: Evidence for Electrogenic Na+/H+ Antiport in Clostridium thermoaceticum
H+ conductance in de-energized cells of Clostridium thermoaceticum and Clostridium acetobutylicum was determined from the rate of realkalinization of the medium after an acid pulse. In both organisms, cell membrane proton permeability was increased by fermentation end products and ionophores. In C. thermoaceticum, H+ conductance was increased by Na+ ions com
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9. Transformation of Clostridium acetobutylicum Protoplasts with Bacteriophage DNA
Techniques for the transformation of Clostridium acetobutylicum protoplasts with bacteriophage DNA are described. Transformation required regeneration of protoplasts and a 2-h eclipse period.
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10. Selection of an Asporogenous Strain of Clostridium acetobutylicum in Continuous Culture Under Phosphate Limitation
Based on the observation that cells of Clostridium acetobutylicum unable to store granulose do not initiate sporulation, a staining procedure was developed for the detection of asporogenous mutants. By application of this procedure it was shown that an asporogenous strain of C. acetobutylicum was selected in continuous culture under phosphate limitation.
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11. Development of a Sensitive Gene Expression Reporter System and an Inducible Promoter-Repressor System for Clostridium acetobutylicum
A sensitive gene expression reporter system was developed for Clostridium acetobutylicum ATCC 824 by using a customized gusA expression cassette. In discontinuous cultures, time course profiles of β-glucuronidase specific activity reflected adequately in vivo dynamic up- and down-regulation of acidogenesis- and/or solventogenesis-associated promoter express
American Society for Microbiology.
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12. Molecular cloning of an alcohol (butanol) dehydrogenase gene cluster from Clostridium acetobutylicum ATCC 824.
In Clostridium acetobutylicum, conversion of butyraldehyde to butanol is enzymatically achieved by butanol dehydrogenase (BDH). A C. acetobutylicum gene that encodes this protein was identified by using an oligonucleotide designed on the basis of the N-terminal amino acid sequence of purified C. acetobutylicum NADH-dependent BDH. Enzyme assays of cell extrac