Division of Food and Nutrition, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, South Korea.
National Institute of Crop Science, Rural Development Administration, 54 Seoho-ro, Gwonseon-gu, Suwon-si, Gyeonggi-do 441-853, South Korea.
Int J Biol Macromol. 2015;77:375-82. doi: 10.1016/j.ijbiomac.2015.02.054. Epub 2015 Mar 14.
Normal rice starches were isolated from six different rice varieties grown in Korea and their molecular structure, crystalline structure, and in vitro digestibility were investigated. Apparent amylose content was the highest in starch from Junam cultivar (25.5%) and lowest in Hopum (22.4%). Starch from Hiami cultivar had the lowest molecular weights of amylose and amylopectin, average amylopectin chain length, proportion of short chains (DP 6-12), and proportion of long chains (DP≥37) among the tested rice starches. The relative crystallinity and ratio of 1047/1022 ranged from 30.2 to 36.7% and from 0.638 to 0.652, respectively. Hiami had the lowest gelatinization temperatures and the highest gelatinization enthalpy. Hiami had the highest pasting temperature (92.1°C), the lowest setback (515cP) and final viscosity (876cP), whereas Hanareum had the lowest pasting temperature (82.7°C), the highest setback (1002cP), and final viscosity (1580cP). The rapidly digestible starch (RDS), slowly digestible starch (SDS), and resistant starch (RS) content ranged from 43.9-53.5%, 35.5-52.6%, and 0.5-15.6%, respectively. The Junam cultivar had the lowest RDS content, whereas Hiami had the highest RDS content. The RS content of Hanareum (16.2%) and Boramchan (14.5%) was significantly higher than that of other normal rice cultivars (3.0-6.5%).
从韩国种植的六种不同水稻品种中分离出普通稻米淀粉，并研究了其分子结构、结晶结构和体外消化率。在 Junam 品种的淀粉中，直链淀粉含量最高（25.5%），而在 Hopum 品种中含量最低（22.4%）。在测试的稻米淀粉中，Hiami 品种的直链淀粉和支链淀粉的分子量最小、平均支链淀粉链长最短、短链（DP6-12）比例最低、长链（DP≥37）比例最高。相对结晶度和 1047/1022 的比例范围分别为 30.2-36.7%和 0.638-0.652。Hiami 的糊化温度最低，糊化焓值最高。Hiami 的峰值黏度（92.1°C）最高，回生值（515cP）和最终黏度（876cP）最低，而 Hanareum 的糊化温度（82.7°C）最低，回生值（1002cP）和最终黏度（1580cP）最高。快速消化淀粉（RDS）、缓慢消化淀粉（SDS）和抗性淀粉（RS）的含量范围分别为 43.9-53.5%、35.5-52.6%和 0.5-15.6%。Junam 品种的 RDS 含量最低，而 Hiami 品种的 RDS 含量最高。Hanareum（16.2%）和 Boramchan（14.5%）的 RS 含量明显高于其他普通稻米品种（3.0-6.5%）。
Zotero 插件