Ratio of heat production to oxygen consumption during the cell cycle of candida maltosa EH 15 grown on ethanol

Abstract

The experimental technique for measurement of microbial culture heat evolution directly in fermenter has been described and its correctness analysed. Heat-to-oxygen ratio, Qo, of synchronized yeast culture in the absence of fermentative metabolism has been found to be practically independent of a cell cycle phase and close to the theoretical constant predicted by the mass-energy balance theory. The collection of literature data on the heat-to-oxygen ratio is given. Energetic properties of cell biomass are discussed on the bask of the obtained and the surveyed values of Q0.

Residual Brewing Yeast as Substrate for Co-Production of Cell Biomass and Biofilm Using Candida maltosa SM4

“…Typically, carbohydrate-based substrates are used, whereas in the present research, residual ethanol was the main carbon source utilized during cultivation. Although ethanol utilization by yeasts is not a very commonly discussed issue, our result is in line with previously reported growth of C. maltosa and other yeasts on ethanol [47,48]. Detailed studies on the metabolism of ethanol [49] and other alcohols [50] in C. maltose have been reported, and two different pathways depending on the chain length of the assimilable alcohol have been identified [50].…”

Candida maltosa

“…2.5). Some aspects of the ethanol metabolism in C. maltosa were reported in connection with the thermodynamics of growth (Minkevich et al 1988;Miiller and Babel 1988), and with the regulation of glyoxylate cycle and gluconeogenesis (Polnisch and Hofmann 1989;Hofmann and Polnisch 1990a;see Sect. 2.5).…”

“…• under normal conditions in discontinuous (batch) cultures on carbohydrates or alkanes or in continuous (chemostat) cultures (Glombitza and Heinritz 1979;Bley et al 1980;Stichel et al 1982;Heinritz et al 1983a;Buttner et al 1985;Minkevich et al 1988;Zentgraf 1991a,b,c);…”