Data/hora: 13/06/2024 06:32:23

Provedor de dados: | 63
País: | Brazil
Título: | Negative H2S character and flocculation as yeast strain markers for inoculum recovery
Autores: | Ribeiro,Carlos Alberto França; Horii,Jorge.
Data: | 2004-06-01
Ano: | 2004
Palavras-chave: | Cell recovery; Hydrogen sulfide; Ethanolic fermentation; Quality control.
Resumo: | Routine identification of yeast behavior is essential to measure the control of the alcohol production process and to maintain product quality standards. This work utilized the non-hydrogen sulfide production and flocculation traits as characteristic strain markers for the evaluation of cell recycling during the alcoholic fermentation process for production of sugarcane alcohol. This study evaluated the behavior of a recombinant yeast bank made by protoplast fusion, for strain screening purposes; strain fermentative kinetics in comparison to commercial baker yeast; viability and recovery of the selected strain on differential media, after five consecutive fermentation batches; and the recovery of the selected strain from fermentation with mixed strain cultures. The strain selected for the H2S negative character kept its viability during successive recyclings, with contamination levels not detected by the method of analysis. It also presented a kinetic behavior similar to that of baker yeast, either in single or mixed culture fermentations, opening new possibilities for further work on quality control of cell recycling in the alcoholic fermentation process.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300009
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162004000300009
Formato: | text/html
Fonte: | Scientia Agricola  v.61 n.3 2004
Fonte: | info:eu-repo/semantics/openAccess