ISSN:
0138-4988
Keywords:
Life Sciences
;
Life Sciences (general)
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The ethanol-inhibitory behaviour of the yeast Saccharomyces cerevisiae Sc 5 was found to be characterized by a continual-linear relation between the specific ethanol formation rate and the ethanol concentration. Therefore the simple equation \documentclass{article}\pagestyle{empty}\begin{document}$$v = v_0 - a \cdot P$$\end{document} could be applied for it.It is shown that this model is correct only then, if all of the process parameters are in their optimum.Out of the optimum temperature range the characteristics of the function ν = f(P) change in such a way that in regard to the ethanol concentration P twc linear relations exist for each suboptimum temperature: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {v_T = v'_{0T} - a_0 \cdot e^{nT} \cdot P,} & {{\rm for}} & {P 〈 P_T } & {{\rm and}} \\\end{array} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {v_T = v_0 - a \cdot P,} & {{\rm for}} & {P 〉 P_T ,} \\\end{array} $$\end{document} and a non-linear equation is current for each superoptimum temperature: \documentclass{article}\pagestyle{empty}\begin{document}$$ v_T = v'_{0T} - a_0 ^\prime \cdot e^{mT} \cdot P^{b_T } , $$\end{document} where bT is also a function of the temperature and always less than 1.Taking as a basis these equations the specific ethanol formation rate of the used strain can be calculated for the whole biokinetic P/T-sphere of ethanol production.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/abio.370080105
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