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Physicochemical properties and structure of starches from Chinese rice cultivars

文献类型： 外文期刊

作者： Wang, Lan 1 ; Xie, Bijun 1 ; Shi, John 3 ; Xue, Sophia 3 ; Deng, Qianchun 4 ; Wei, Yu 2 ; Tian, Binqiang 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan 430070, Peoples R China

2.Hubei Acad Agr Sci, Inst Farm Prod Proc & Nucl Agr Technol, Wuhan 430064, Peoples R China

3.Agr & Agri Food Canada, Guleph Food Res Ctr, Guelph, ON N1G 5C9, Canada

4.CAAS, Oil Crops Res Inst, Wuhan 430062, Peoples R China

关键词： China rice starches;physicochemical properties;thermal properties;rheological properties;structure;isoamylase

期刊名称：FOOD HYDROCOLLOIDS （ 影响因子：9.147； 五年影响因子：9.169 ）

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收录情况： SCI

摘要： Starches from 10 different non-waxy rice cultivars in China were isolated and investigated for their physicochemical properties including the swelling power, solubility, syneresis, thermal. Theological and textural properties, and structure. The range of amylose content in 10 rice starches was between 18.1 and 31.6%. The branch chain length distribution of amylopectin revealed that the proportions of short (DP6-11), medium (DP12-17), and longer chains (DP18-23) were 4.6-11.1%, 47.0-51.6% and 25.3-31.8%, respectively. The relationships between different properties of rice starches were determined using Pearson correlation analysis. Amylose content was negatively correlated to swelling power (r = -0.632, p ≤ 0.05) and positively correlated to gel hardness (r = 0.776, p ≤ 0.01). The percentage of short chains (DP6-11) was negatively related to the transition temperatures (T_o, T_p and T_c), T_(oG') and T_(G'max). while the percentage of medium chains (DP12-23) was positively related. Various branch chain length amylopectins played different roles in Theological behavior of starch dispersions. The percentage of short chains (DP6-11) was positively correlated to G' and G"(r = 0.832 and r = 0.775, respectively, p ≤ 0.01), and negatively correlated to tanδ peak (r = -0.717, p ≤ 0.05). However, the percentage of longer chains (DP18-23) showed a negative relation with G' and G" (r= -0.794, p ≤ 0.01; r = -0.741, p ≤ 0.05), and a positive relation with tanδ peak (r = 0.668, p ≤ 0.05).

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