Thermodynamic study of metabolic reactions in an aqueous protein solution |
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| Authors: | T. Kamiyama Y. Toshima T. Matsushita T. Kimura |
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| Affiliation: | (1) Department of Chemistry, Faculty of Science and Engineering, Kinki University, Kowakae 3-4-1, Higashi-Osaka, 577-8502, Japan;(2) Department of Chemistry, Faculty of Science and Engineering, Kinki University, Kowakae 3-4-1, Higashi-Osaka, 577-8502, Japan;(3) Department of Chemistry, Faculty of Science and Engineering, Kinki University, Kowakae 3-4-1, Higashi-Osaka, 577-8502, Japan;(4) Department of Chemistry, Faculty of Science and Engineering, Kinki University, Kowakae 3-4-1, Higashi-Osaka, 577-8502, Japan |
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| Abstract: | Summary The time dependences of the thermal power of aqueous myoglobin solutions were measured by microcalorimeter at 298.15 K. Exothermic reactions occurred in aqueous myoglobin solutions due to the metabolism of aerobic microbes, and these roughly consisted of four phases. The generation times obtained were about (55±5) min for the logarithmic exothermal reaction phase. The total energies were considerably dependent on the amount of oxygen present, suggesting strongly that the exothermic reaction was caused by aerobic microbes. The apparent thermal metabolic rates were positively dependent on the concentration of myoglobin, probably because of the effects of myoglobin as a food source and/or as a donor of oxygen. |
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| Keywords: | metabolism spectroscopy microcalorimeter aerobic microbe myoglobin |
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