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Ethanol production in Brazil: a bridge between science and industry BJM
Lopes,Mario Lucio; Paulillo,Silene Cristina de Lima; Godoy,Alexandre; Cherubin,Rudimar Antonio; Lorenzi,Marcel Salmeron; Giometti,Fernando Henrique Carvalho; Bernardino,Claudemir Domingos; Amorim Neto,Henrique Berbert de; Amorim,Henrique Vianna de.
ABSTRACT In the last 40 years, several scientific and technological advances in microbiology of the fermentation have greatly contributed to evolution of the ethanol industry in Brazil. These contributions have increased our view and comprehension about fermentations in the first and, more recently, second-generation ethanol. Nowadays, new technologies are available to produce ethanol from sugarcane, corn and other feedstocks, reducing the off-season period. Better control of fermentation conditions can reduce the stress conditions for yeast cells and contamination by bacteria and wild yeasts. There are great research opportunities in production processes of the first-generation ethanol regarding high-value added products, cost reduction and selection of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ethanol; Yeast; Fermentation; Distillery.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000500064
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Mobilization of endogenous glycogen and trehalose of industrial yeasts BJM
Paulillo,Silene Cristina de Lima; Yokoya,Fumio; Basso,Luiz Carlos.
The fermentation of yeast reserve carbohydrates, glycogen and trehalose is a procedure to increase protein level of yeast cells and improve ethanol production. This work studied on the degradation kinetics of glycogen and trehalose carried out with two industrial strains of Saccharomyces cerevisiae (PE-2 and SA-1) and the effect of different temperatures (38º, 40º, 42º and 44ºC) on degradation rate. Endogenous fermentation was carried out in a yeast suspension at 20% (w/v) based on wet weight, suspended in fermented media with 3.0 to 4.5 % (v/v) of ethanol. The degradation of the carbohydrate reserves at 40ºC followed first-order kinetics, showing that its rate is mainly dependent on the carbohydrate concentration in the cell. The degradation rate (k)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharomyces cerevisiae; Glycogen; Trehalose; Yeast; Fermentation.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000300014
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