Effects of different substrates on growth and glycerol production kinetics of a wine yeast strain Saccharomyces cerevisiae Narince 3


Yalcin S., Ozbas Z.

PROCESS BIOCHEMISTRY, cilt.39, sa.10, ss.1285-1291, 2004 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Konu: 10
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/s0032-9592(03)00252-8
  • Dergi Adı: PROCESS BIOCHEMISTRY
  • Sayfa Sayıları: ss.1285-1291

Özet

Glycerol, is important industrial product that can be produced using osmophilic yeasts. A study was carried out to determine the effects of glucose, fructose, and sucrose on growth and glycerol production kinetics of a wine yeast strain Saccharomyces cerevisiae Narince 3 in a batch system. Depending on the determined values of Monod constants, sucrose (K-s = 44.53 g/l) was the most suitable substrate for yeast growth. Initial glucose, fructose and sucrose concentrations necessary for maximum specific yeast growth rate were 125, 175, and 200 g/l, respectively. The glycerol production rate was highest in fructose medium and reached a maximum level in the medium of 350 g/l of initial fructose concentration. In glucose medium, optimal glycerol production was observed at 300 g/l initial glucose concentration and at 400 g/l initial sucrose concentration in medium containing sucrose. In grape juice medium, maximum glycerol concentration and dry weight were 14.1 and 8.0 g/l, respectively. (C) 2003 Elsevier Ltd. All rights reserved.