Characterization of Some Fungal Chitosans

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概要

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• Chitosan-like materials were extracted from five different fungal cells with NaOH and acetic acid, with the yields varying from 1.2 to 10.4% of the dry fungal cell weight. The degree of N-acetylation of the extracts measured by the colloidal titration method varied considerably depending on the individual species. By IR measurements and the Elson-Morgan method, four kinds of the extracts were characterized as chitosan while another one was not. The degree of N-acetylation and the Cu^<2+> adsorption capacity of the fungal chitosans were measured and compared with those of authentic samples with various degrees of N-acetylation, which were prepared by chemical treatment of authentic chitin and chitosan derived from Crustacea. The Cu^<2+> adsorption capacity of the fungal chitosans was higher than that of the authentic chitosan samples with similar degrees of N-acetylation and independent of the molecular weight of the chitosans from the various sources.

• 社団法人日本農芸化学会の論文
• 1992-12-23

著者

• WATANABE Kimitsuna

  Department of Chemistry and Biotechnology,Graduate School of Engineering,The University of Tokyo

• ONODERA Kazukiyo

  Department of Agriculture and Life Sciences, Faculty of Agriculture, The University of Tokyo

• Miyoshi Hiroshi

  Cooperate Research Center Shin-etsu Chemical Co. Ltd.

• SHIMURA Kaori

  Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Techn

• Shimura K

  Tokyo Inst. Technol. Tokyo Jpn

• Onodera Kazukiyo

  Department Of Agricultural Chemistry Faculty Of Agriculture The University Of Tokyo

• Shimura Kaori

  Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol

• Watanabe Kimitsuna

  Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol

• WATANABE Kimitsuna

  Department of Agricultural Chemistry, Faculty of Agriculture, University of Tokyo

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