Anticoagulant activity of a sulfated chitosan.
Chitin prepared from the shells of rice-field crabs (Somanniathelphusa dugasti) was converted into chitosan with a degree of acetylation of 0.21 and then sulfated with chlorosulfonic acid in N,N-dimethylformamide under semi-heterogeneous conditions to give 87% of water-soluble sulfated chitosan with...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-1842834328&partnerID=40&md5=d1629802eb3fadb845af79f7e1b8b61e http://cmuir.cmu.ac.th/handle/6653943832/2512 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Chitin prepared from the shells of rice-field crabs (Somanniathelphusa dugasti) was converted into chitosan with a degree of acetylation of 0.21 and then sulfated with chlorosulfonic acid in N,N-dimethylformamide under semi-heterogeneous conditions to give 87% of water-soluble sulfated chitosan with degree of substitution (d.s) of 2.13. 1H NMR revealed the sulfate substitution at C-2, C-3 and C-6. Gel filtration on Sepharose CL-6B of the sulfated chitosan gave three fractions with average molecular weights of 7.1, 3.5, and 1.9 x 10(4). The three sulfated chitosan preparations showed strong anticoagulant activities, with the same mechanism of action observed for standard therapeutic heparin. |
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