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- Title
Very high gravity wort fermentation by immobilised yeast.
- Authors
Pátková, Jaroslava; Šmogrovičová, Daniela; Dömény, Zoltán; Bafrncová, Petra
- Abstract
Using calcium alginate-entrapped yeast, 24% (w/w) wort was successfully fermented within 8 days. This is half the time needed for fermentation by free yeast. The highest ethanol concentration obtained was 10.5% (v/v). When the original wort gravity was increased, the specific rate of ethanol production remained constant 0.16 g gh-1 and the viability did not fall bellow 95% of living cells. Protection of cell against osmotic stress by gel matrix was also confirmed by trehalose measurement. The maximum intracellular trehalose content in calcium alginate-entrapped yeast was 3 times lower compared to free yeast at 30% (w/w) wort fermentation.
- Subjects
CALCIUM; YEAST; EDIBLE fungi; LEAVENING agents; ALCOHOL; OSMOSIS
- Publication
Biotechnology Letters, 2000, Vol 22, Issue 14, p1173
- ISSN
0141-5492
- Publication type
Article
- DOI
10.1023/a:1005689313775