New starches from traditional Chinese medicine (TCM) - Chinese yam (Dioscorea opposita Thunb.) cultivars
文献类型: 外文期刊
第一作者: Wang, SJ
作者: Wang, SJ;Yu, JL;Gao, WY;Liu, HY;Xiao, PG
作者机构:
关键词: Dioscorea opposita Thunb;starch;morphology;thermal;crystallinity
期刊名称:CARBOHYDRATE RESEARCH ( 影响因子:2.104; 五年影响因子:2.192 )
ISSN: 0008-6215
年卷期: 2006 年 341 卷 2 期
页码:
收录情况: SCI
摘要: The starches separated from two different Dioscorea opposita Thunb. cultivars were investigated for morphological, thermal and crystal properties. The shape of starch granules separated from different D. opposita Thunb. cultivars varied from round to oval or irregular. The surface of the starch granules appeared to be smooth without any fissures. The average particle diameter of starches from different D. opposita Thunb. cultivars was 40.3 and 38.7 mu m for D. 47 and D. SXY starch, respectively. The transition temperatures (T-o, T-p and T-c) and enthalpy of gelatinization (Delta H-gel) were determined using differential scanning calorimetry (DSC). The D. SXY starch showed the lower T-o (74.2 degrees C) and the broader R (12.4). T-p and T-c of starch from D. 47 were higher than that of D. SXY starch. Delta H-gel values (11.37 J/g) of D. 47 was higher than that of D. SXY starch (10.78 J/g). The crystal type of starches separated from two different D. opposita cultivars was a typical C-type pattern. The degree of crystallinity of two D. opposita cultivars starches was about 45.9% and 31.5%, respectively. (c) 2005 Elsevier Ltd. All rights reserved.
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