Isolation and characterization of the slime from a cyanobacterium, Microcystis aeruginosa K-3A.

  • NAKAGAWA Michihiko
    Department of Agricultural Chemistry, Faculty of Agriculture, Ibaraki University
  • TAKAMURA Yoshichika
    Department of Agricultural Chemistry, Faculty of Agriculture, Ibaraki University
  • YAGI Osami
    Water and Soil Environmental Division, The National Institute for Environmental Studies

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A slime material was isolated from axenic cells of the cyanobacterium, Microcystis aeruginosa K-3A, grown in a synthetic medium. Isolation and purification of the slime material were facilitated by the application of a mild mechanical force followed by specific coagulation with calcium ions. The slime material, of a high degree of purity, was isolated in yields of 7.2% as dry weight and 34.5% as fresh weight from whole cells. The slime gel could immobilize a large volume of water in the native state.<br> The slime material contained 66.9% (w/w) carbohydrate and 12.8% protein. Chemical analyses showed that the carbohydrate was a heteropolysaccharide containing galacturonic acid, rhamnose and xylose as the major constituents in addition to the sugars, fucose, arabinose, mannose, galactose and glucose. The slime material was insoluble in cold and hot water but soluble in 1 N NaOH. Multivalent metal cations and an acidic pH specifically coagulated the slime material, to form gel.

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詳細情報

  • CRID
    1390001206468343552
  • NII論文ID
    110006323260
  • NII書誌ID
    AA00515312
  • DOI
    10.1271/bbb1961.51.329
  • ISSN
    18811280
    00021369
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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