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Degrees of long-chain branching in dextrans

โœ Scribed by Takashi Kuge; Kimie Kobayashi; Shinichi Kitamura; Hiroshi Tanahashi

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
566 KB
Volume
160
Category
Article
ISSN
0008-6215

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โœฆ Synopsis

To estimate the content of long-chain branching in dextrans, gel-permeation c~omato~aphy (g.p.c.) and viscometric me~~ernen~ were carried out. The data obtained were analyzed by an iterative, computer method, proposed by Kurata et al., that can evaluate only the content of long-chain branching in a polymer. The dextrans used were those produced by Lewonostoc mesenteroides B-512 and other strains. The molecular weights of samples investigated ranged from 6.8 x 106 to 1.0 x 109, and the results indicated that the long-branch content increases with increasing molecular weight.

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