caa a22 4500 465822436 CHVBK 20180323112139.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00903771 doi (NATIONALLICENCE)springer-10.1007/BF00903771 Effects of extractive fermentation on butyric acid production by Clostridium acetobutylicum [Elektronische Daten] [Patrick Evans, Henry Wang] Summary: The addition of an oleyl alcohol extractant to a batch fermentation of glucose byClostridium acetobutylicum resulted in a concentration profile that was distinctly different from the non-extractive control fermentation. The concentration of butyric acid increased and subsequently decreased in the control fermentation. The concentration of butyric acid increased but did not subsequently decrease in the oleyl alcohol extractive fermentation. The production of butyric acid was found to have been prolonged into the solventogenic phase in the oleyl alcohol extractive fermentation. Butyric acid was continually replenished from glucose while it was being converted to butanol. Supplementation of exogenous acetic and butyric acids, the metabolic uncoupler carbonyl cyanide 3-chlorophenylhydrazone, or decanol to the oleyl alcohol extractive fermentation helped to reinstate the normal butyric acid concentration profile. These findings are discussed with respect to the effects of these additives on the ΔpH ofC. acetobutylicum and its importance with regard to the production of butyric acid. Springer-Verlag, 1990 Evans Patrick Department of Chemical Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA aut Wang Henry Department of Chemical Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA aut Applied Microbiology and Biotechnology Springer-Verlag 32/4(1990-01-01), 393-397 0175-7598 32:4<393 1990 32 253 https://doi.org/10.1007/BF00903771 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00903771 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Evans Patrick Department of Chemical Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Wang Henry Department of Chemical Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer-Verlag 32/4(1990-01-01), 393-397 0175-7598 32:4<393 1990 32 253 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer