Empirical elemental formula for biomass
Budding yeast Saccharomyces cerevisiae
von Stockar, U. Liu, J. Does microbial life always feed on negative entropy? Thermodynamic analysis of microbial growth. 1999. Biochim Biophys Acta. 1412(3) p.198 table 4
|Reference PubMed ID||
1) Edwin H. Battley, Robert L. Putnam, Juliana Boerio-Goates, Heat capacity measurements from 10 to 300 K and derived thermodynamic functions of lyophilized cells of Saccharomyces cerevisiae including the absolute entropy and the entropy of formation at 298.15 K, Thermochim. Acta 298 (1997) 37-46. (2) J.A. Roels, Energetics and Kinetics in Biotechnology, Elsevier, Amsterdam, 1983. AND (3) Edwin H. Battley, An empirical method for estimating the entropy of formation and the absolute entropy of dried microbial biomass for use in studies on the thermodynamics of microbial growth, Thermochim. Acta 326 (1999) 7-15.
(Primary source 1) measurement of the heat capacity of lyophilized Saccharomyces
cerevisiae cells over a temperature range
of 10^300 K, and consequently determined the entropy
of the dried biomass. (Primary source 3:) an empirical
method to estimate the entropy of the biomass based
on the atomic entropies of the atoms comprising the
biomass. As the researcher showed, this method gives very good
accuracy as compared to the values calculated based
on the experimentally determined entropies.
This means that for every mole of carbon, there are 1.613 moles of hydrogen, 0.557 moles of oxygen and 0.158 moles of nitrogen. There are also 0.012 moles of phosphorus, 0.003 of sulfur, 0.003 of magnesium, 0.022 of potassium and 0.001 of calcium.
Jul 16, 2008 4:51 PM
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