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Evaluation of the Lactic Acid Consumption in Yeast Cultures by Voltammetric Means
Author(s) -
Rodrigues A.,
Bento M. F.,
Geraldo M. D.,
Cássio F.
Publication year - 2005
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200403176
Subject(s) - yeast , absorbance , lactic acid , saccharomyces cerevisiae , microelectrode , voltammetry , chemistry , cyclic voltammetry , food science , biomass (ecology) , platinum , biochemistry , biology , chromatography , catalysis , electrochemistry , bacteria , electrode , genetics , ecology
The voltammetric study of the lactic acid reduction was performed in media suitable for yeast growth, using platinum microelectrodes. The decrease of the voltammetric peak current from square‐wave voltammetry, Δ I p , in cultures of the yeasts Candida utilis and Saccharomyces cerevisiae was related to both the growth time and cellular biomass. Either the imposed variations of medium composition or those resulting from cellular growth did not significantly affect the Δ I p values. For both yeast species, similar specific growth rates were estimated from the variation of I p and absorbance at 640 nm.