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Metabolic heat evolution of Saccharomyces cerevisiae grown under very-high-gravity conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
35316 45086 2008 6 PDF Available
Title
Metabolic heat evolution of Saccharomyces cerevisiae grown under very-high-gravity conditions
Abstract

Metabolic heat evolution of Saccharomyces cerevisiae under conditions of various combinations of glucose level (low gravity, 10 g glucose/l; very-high-gravity, 300 g glucose/l), temperature, and urea concentration was investigated. The measured overall metabolic heat evolution was 0.416 and 0.476 J/h, respectively, for 10 and 300 g glucose/l in the presence of urea. As glucose level was increased from low- to very-high-gravity when urea was supplemented, a lesser amount of heat evolved (66–43 kJ/mol glucose consumed; 54–32 kJ/mol ethanol produced at 25 °C), implying that a combined substrate and product inhibitory effect was exerted on yeast. When yeast was cultivated under 300 g glucose/l without urea addition, more metabolic heat was evolved at the elevation of fermentation temperature. Comparatively, when yeast was grown at a very-high-gravity condition with urea addition, an inverse relationship between temperature and metabolic heat evolution was recorded.

Keywords
Metabolic heat evolution; Microcalorimetry; Very-high-gravity fermentation; Fuel alcohol; Ethanol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 43, Issue 11, November 2008, Pages 1253–1258
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us