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Stimulation des Wachstums von Torulopsis utilis ( Candida utilis ) in Saccharose‐haltiger Nährlösung durch verschiedene Vitamin‐ und Wuchsstoffquellen
Author(s) -
Leopold H.,
Španêlová M.
Publication year - 1974
Publication title -
zeitschrift für allgemeine mikrobiologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0044-2208
DOI - 10.1002/jobm.19740140504
Subject(s) - corn steep liquor , mycelium , fermentation , chemistry , citric acid , food science , sugar , biomass (ecology) , aspergillus niger , yeast extract , yeast , botany , biology , biochemistry , agronomy
If Torulopsis utilis is grown in mineral solutions containing 2.5 and 5% sugar the yields of yeast dry matter are only 80% and 26%, respectively, relative to the theoretical value if an economical coefficient of 50% is used. In the presence of 30% of waste liquor of the citric acid fermentation (CAF‐waste liquor) the yields attain 70‐85%. The effects of corn‐steep, group B vitamins or of biotin are much lower. Theoretical and higher yields of biomass are obtained by the combination of the CAF‐waste liquor with corn‐steep. The stimulation of yeast growth by wet or dry mycelium of the mould Aspergillus niger was similar to that of the CAF‐waste liquor, both when acting alone and in combination with other carriers of vitamins or growth factors. A good effect was observed with a mixture of the CAF‐waste liquor and the mould mycelium, both products of the citric acid fermentation. Mineral salt solutions containing 7% sugar may be fermented with theoretical yields by adding larger quantities of CAF‐waste liquor and mould mycelium. An attempt is made to interpret some of the findings according to the hypothesis of overflow metabolism.