ON THE ENTHALPY OF FORMATION OF ESCHERICHIA-COLI K-12 CELLS

被引:40
作者
BATTLEY, EH
机构
[1] Department of Ecology and Evolution, State University of New York at Stony Brook, Stony Brook, New York
关键词
MICROBIAL CALORIMETRY; HEAT OF FORMATION; HEAT OF GROWTH; ESCHERICHIA-COLI K-12; HEAT OF COMBUSTION;
D O I
10.1002/bit.260390103
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
An examination is made of five methods for obtaining values of the enthalpy of formation of a unit mass of living Escherichia coli K-12 cells. The values obtained by these methods ranged from -88.95 kJ to -99.55 kJ, the gross average being 96.01 kJ, per unit carbon formula weight equivalent of living, hydrated cells. Although theoretically the growth of this organism in a microcalorimeter should provide the best value, the value obtained by this method (-88.95 kJ per UCFW equivalent) is not in close agreement with those of the other four methods, the values from which form a cluster averaging -97.8 +/- 1.0 kJ (-23.4 +/0. 2 kcal)/UCFW equivalent. Calculations using this value indicate that the enthalpy change accompanying anabolism (as this is represented) is zero, or very nearly so, and that the heat of growth is that from catabolism alone.
引用
收藏
页码:5 / 12
页数:8
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