title: Oxygen isotope fractionation during respiration for different temperatures of T. utilis and E. coli K12.
abstract: The temperature dependence of the oxygen isotope fractionation factor during respiration has been examined for two different microorganisms, namely Torulopsis utilis and Escherichia coli K12 representing a yeast and a bacterium, respectively. The investigation covered a temperature range of 18 degrees C, that is from 16 degrees C to 34 degrees C for T. utilis and from 19 degrees C to 37 degrees C for E. coli K12. Within this temperature range the fractionation factor of T. utilis increases by 0.18% an insignificant change (delta delta 10 degrees C = 0.063%; r = 0.067), whereas with E. coli K12 an increase of 1.12% has been observed (delta delta  10 degrees C = 0.6%; r = 0.55).
mesh_terms: D002175:Candida / Q000378:metabolism*; D004926:Escherichia coli / Q000378:metabolism*; D008954:Models, Biological; D010100:Oxygen / Q000378:metabolism*; D010103:Oxygen Isotopes; D013696:Temperature
chemical_list: D010103:Oxygen Isotopes; D010100:Oxygen