Structural characteristics of low-digestible sweet potato starch prepared by heat-moisture treatment

被引：24

作者：

Na, Jong Hee ^{[1
]}

Kim, Ha Ram ^{[2
]}

Kim, Yang ^{[3
,4
]}

Lee, Joon Seol ^{[5
]}

Park, Hyun Jin ^{[1
]}

Moon, Tae Wha ^{[2
,3
,4
]}

Lee, Chang Joo ^{[6
]}

机构：

[1] Korea Univ, Dept Biotechnol, Seoul 02841, South Korea

[2] Seoul Natl Univ, Dept Agr Biotechnol, Seoul 08826, South Korea

[3] Seoul Natl Univ, Ctr Food & Bioconvergence, Seoul 08826, South Korea

[4] Seoul Natl Univ, Res Inst Agr & Life Sci, Seoul 08826, South Korea

[5] Rural Dev Adm, Natl Inst Crop Sci, Bioenergy Crop Res Inst, Muan Gun 58545, Jeollanam Do, South Korea

[6] Wonkwang Univ, Dept Food Sci & Biotechnol, Iksan 54538, Jeonbuk, South Korea

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2020年 / 151卷

关键词：

Sweet potato starch; Slowly digestible starch; Heat-moisture treatment; PHYSICOCHEMICAL PROPERTIES; CHAIN-LENGTH; HYDROTHERMAL MODIFICATIONS; MOLECULAR-STRUCTURE; GLUCOSE RESPONSE; RESISTANT STARCH; RICE STARCH; AMYLOPECTIN; WAXY; GELATINIZATION;

D O I：

10.1016/j.ijbiomac.2019.10.146

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The objectives of this study were to optimize the conditions for the preparation of sweet potato starch containing a high proportion of slowly digestible starch (SDS) by heat-moisture treatment (HMT), and to investigate the structural properties of SDS and resistant starch (RS) fractions isolated from this modified starch. Response surface methodology evaluation of considering temperature, time, and moisture content was conducted to determine the HMT condition for maximizing SDS yield. Maximum SDS content (50.9%) was obtained after 8.6 hat 113 degrees C with 22.8% moisture level. Scanning electron micrographs of RS fractions displayed growth ring structure and hollow regions. X-ray diffraction patterns of SDS + RS and RS fractions were not changed by HMT. Gelatinization enthalpy of the SDS + RS fraction was decreased more than that of the RS fraction. The results indicated that the SDS fraction consisted of less perfect crystallites and amorphous regions, whereas the RS fraction was composed mostly of crystalline regions. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：1049 / 1057

页数：9

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