Extraction of novel sulfated polysaccharides from Aphanothece sacrum (Sur.) Okada, and its spectroscopic characterization

We extracted polysaccharides (PS) from 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 %. H NMR studie...

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Bibliographic Details
Published inPure and applied chemistry Vol. 79; no. 11; pp. 2039 - 2046
Main Authors Okajima-Kaneko, Maiko, Ono, Masateru, Kabata, Kiyotaka, Kaneko, Tatsuo
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 01.01.2007
Walter de Gruyter GmbH
Subjects
Biopolymers
cyanobacterium
extraction
Fucose
Gelation
gels
NMR
Nuclear magnetic resonance
Nucleotides
Polysaccharides
Soil swelling
spectroscopy
Sulfation
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Summary:We extracted polysaccharides (PS) from 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 %. H NMR studies demonstrated that the PS of 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 , which has been mass cultivated in Japan for a long time, may have potential as an environmentally benign water absorbent.
ISSN:0033-4545
1365-3075
DOI:10.1351/pac200779112039