Constitution of konjac glucomannan:: chemical analysis and 13C NMR spectroscopy

被引：323

作者：

Katsuraya, K

Okuyama, K

Hatanaka, K

Oshima, R

Sato, T

Matsuzaki, K

机构：

[1] Wayo Womens Univ, Chiba 2728533, Japan

[2] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan

[3] Shinshu Univ, Fac Text Sci & Technol, Ueda, Nagano 3860018, Japan

来源：

CARBOHYDRATE POLYMERS | 2003年 / 53卷 / 02期

关键词：

konjac glucomannan; C-13 NMR spectra; methylation analysis;

D O I：

10.1016/S0144-8617(03)00039-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The constitution of konjac glucomannan was determined by methylation analysis and C-13 NMR spectroscopy. The results of methylation analysis showed that the branching point is C-6 carbon of glucosyl units. C-13 NMR spectroscopy (ID and DEPT) of konjac glucomannan supported the presence of beta-C-1-linked C-6 carbon of glucosyl units as the branching units. This result differs from previous investigations. The C-13 NMR spectra indicated that the ratio of terminal glucosyl units to terminal mannosyl units is ca. 2 and branching frequency is ca. 8%, supporting the results by Smith et al. From the splitting of main chain signals the sequences of glucosyl and mannosyl units in konjac glucomannan are estimated and a model structure for the glucomannan is proposed. (C) 2003 Elsevier Science Ltd. All rights reserved.

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页码：183 / 189

页数：7

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