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Change in the Anticoagulant Activity and Composition of a Fucan Sulfate from the Brown Seaweed Ecklonia kurome During Refrigerated Storage of the Fronds

Change in the Anticoagulant Activity and Composition of a Fucan Sulfate from the Brown Seaweed... Abstract The fucan sulfate extracted from Ecklonia after it had been stored at --20 °C for 3 years differed from that extracted from fresh material. The anticoagulant activity of the extract from the stored material was only half that of a similar extract from fresh material. Introduction In a previous study, a potent anticoagulant fucan sulfate (C-II), which consisted of fucose (Fuc), galactose (Gal), glucuronic acid (GlcA) and sulfate in the molar ratio of 1.00:0.19:0.07:1.48 and had an average molecular weight of 21 000, was purified in 1986 from the brown seaweed Ecklonia kurome Okamura collected in the Japan sea in 1985 (Nishino et al. 1989). In 1988, for further study, we attempted to isolate fucan sulfate from the same seaweed fronds which had been stored at --20 °C until use. However, the fucan sulfate (C-II-88) obtained from the stored seaweed fronds differed very much from the fucan sulfate (C-II) isolated in 1986 with regard to the components and the anticoagulant activity, though both fucan sulfates were prepared from the same source. This fact suggests that the chemical and biological properties of the fuean sulfate may have changed during the period of storage of the seaweed fronds in http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

Change in the Anticoagulant Activity and Composition of a Fucan Sulfate from the Brown Seaweed Ecklonia kurome During Refrigerated Storage of the Fronds

Botanica Marina , Volume 34 (5) – Jan 1, 1991

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Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1991.34.5.387
Publisher site
See Article on Publisher Site

Abstract

Abstract The fucan sulfate extracted from Ecklonia after it had been stored at --20 °C for 3 years differed from that extracted from fresh material. The anticoagulant activity of the extract from the stored material was only half that of a similar extract from fresh material. Introduction In a previous study, a potent anticoagulant fucan sulfate (C-II), which consisted of fucose (Fuc), galactose (Gal), glucuronic acid (GlcA) and sulfate in the molar ratio of 1.00:0.19:0.07:1.48 and had an average molecular weight of 21 000, was purified in 1986 from the brown seaweed Ecklonia kurome Okamura collected in the Japan sea in 1985 (Nishino et al. 1989). In 1988, for further study, we attempted to isolate fucan sulfate from the same seaweed fronds which had been stored at --20 °C until use. However, the fucan sulfate (C-II-88) obtained from the stored seaweed fronds differed very much from the fucan sulfate (C-II) isolated in 1986 with regard to the components and the anticoagulant activity, though both fucan sulfates were prepared from the same source. This fact suggests that the chemical and biological properties of the fuean sulfate may have changed during the period of storage of the seaweed fronds in

Journal

Botanica Marinade Gruyter

Published: Jan 1, 1991

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