SciELO - Scientific Electronic Library Online

 
vol.48Effect of nitrite on alcoholic fermentation carried out with Saccharomyces cerevisiaeFloristic and fitossociological survey of the "Escola Superior de agricultura Luiz de Queiroz" Park author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Anais da Escola Superior de Agricultura Luiz de Queiroz

Print version ISSN 0071-1276

Abstract

GUTIERREZ, Luiz Eduardo. Glycerol production of strains of Saccharomyces during alcoholic fermentation. An. Esc. Super. Agric. Luiz de Queiroz [online]. 1991, vol.48, pp. 55-69. ISSN 0071-1276.  http://dx.doi.org/10.1590/S0071-12761991000100005.

This study was carried out to compare the effects of several factors (temperature, pH, sucrose concentration, 2,4-dinitrophenol and nitrogen sources) on glycerol production by Saccharomyces uvarum IZ-19 04 and Saccharomyces cerevisiae (M-300-A and baker's yeast) during alcoholic fermentation. The strain of yeast strongly influenced the amount of glycerol. With IZ-1904 there was lower production of glycerol than M-3 00-A and baker's yeast in all conditions studied. Significantly more glycerol was formed by fermentation at 34°C than at 25°C and 12°C. At pH 4.5 there was higher glycerol production than at pH 3.0. Addition of 18 ppm 2,4-dinitrophenol decreased the amount of glycerol formed, and the decrease was greater with M-300-A and baker's yeast than IZ-1904. The increase of sucrose concentrations led to a higher production of glycerol.

Keywords : Glycerol; Saccharomyces; alcoholic fermentation.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese