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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/7899

Title: Extraction of novel sulfated polysaccharides from Aphanothece sacrum (Sur.) Okada, and its spectroscopic characterization
Authors: Okajima-Kaneko, Maiko
Ono, Masateru
Kabata, Kiyotaka
Kaneko, Tatsuo
Keywords: polysaccharides
extraction
cyanobacterium
gels
spectroscopy
Issue Date: 2007
Publisher: International Union of Pure and Applied Chemistry
Magazine name: Pure and Applied Chemistry
Volume: 79
Number: 11
Start page: 2039
End page: 2046
DOI: 10.1351/pac200779112039
Abstract: We extracted polysaccharides (PS) from Aphanothece sacrum using a hot alkaline solution which degraded other biopolymers such as proteins and nucleotides. The spectroscopy and elemental analyses indicated the PS contain carboxyls and sulfate groups. The degree of sulfation was estimated as about 10 mol %. ^1H NMR studies demonstrated that the PS of A. sacrum had a dimethylated fucose unit. The combination of sulfate group and fucose in the prokaryotic PS was first evidenced by the direct spectroscopic studies. The PS showed efficient gelation behavior, binding to metal ions abundant in soil, and the swelling volume of the gel was approximately 250 times the dry volume. These results imply that PS of A. sacrum, which has been mass cultivated in Japan for a long time, may have potential as an environmentally benign water absorbent.
Rights: Copyright (C) 2007 International Union of Pure and Applied Chemistry. Maiko Okajima-Kaneko, Masateru Ono, Kiyotaka Kabata, and Tatsuo Kaneko, Pure and Applied Chemistry, 79(11), 2007, 2039-2046.
URI: http://hdl.handle.net/10119/7899
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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