Primary Study on the Composition and Structure of Polysaccharides from Bangia fusco-purpurea

Abstract

Abstract: Polysaccharides of Bangia fusco-purpurea from Fujian province were extracted with hot water,removed proteins by method of Sevage and precipitated by ethanol. Tree purified polysaccharides were obtained by DEAE-Cellulose 32 and Sephadex G-200 column chromatography. PY3 was the main polysaccharide,which contained 65.9% galactose and 9.53% sulfate. The ultraviolet spectrum showed there were no proteins and nucleic acids in PY3. Element analysis showed the atomic ratio of C:N:S of PY3 was 72:2:3. The monomers of PY3 were galactose and xylose with a mole ratio of 11:1 by gas chromatography. And the infrared spectrum indicated that there were no specific absorption of 3,6-anhydro-galaetose but a distinct absorption of sulfate,suggested that PY3 may be a precursor agarose.

Key words: , Bangia fusco-purpurea； polysaccharide； composition； structure；

HE Bi-Yan, 欧Guang-南, LI Xu-Min, Chen-Wu-Jun, Zhang-Xing-Ru. Primary Study on the Composition and Structure of Polysaccharides from Bangia fusco-purpurea[J]. FOOD SCIENCE, 2006, 27(11): 210-214.

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Primary Study on the Composition and Structure of Polysaccharides from Bangia fusco-purpurea

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