Increase in thermal stability of proteins adsorbed on biomass charcoal powder prepared from plant biomass wastes


Thermal stability of lysozyme adsorbed on biomass charcoal powder (BCP), which was prepared from plant biomass wastes such as dumped adzuki bean, bamboo, and wood by pyrolysis without combustion under nitrogen atmosphere and comminution with a jet mill, was examined. Adsorbing lysozyme on BCP could sufficiently prevent proteins from denaturing and aggregating in an aqueous solution at high temperatures, and enhanced the refolding of thermally denatured proteins by cooling treatment. The remaining activities of lysozyme adsorbed on BCP of adzuki bean exhibited 51% by cooling treatment after the heat treatment at 90?C for 30 min, although that of native lysozyme was almost lost under the same experimental conditions. The thermostabilization effect of BCP on the remaining activity of adsorbed lysozyme was markedly dependent upon the kind of plant biomass wastes.

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Noritomi, H. , Kai, R. , Iwai, D. , Tanaka, H. , Kamiya, R. , Tanaka, M. , Muneki, K. and Kato, S. (2011) Increase in thermal stability of proteins adsorbed on biomass charcoal powder prepared from plant biomass wastes. Journal of Biomedical Science and Engineering, 4, 692-698. doi: 10.4236/jbise.2011.411086.

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The authors declare no conflicts of interest.


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