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投稿时间:2016-08-11
投稿时间:2016-08-11
中文摘要: 为了研究芭蕉芋淀粉的加工与营养特性,采用差示扫描量热仪(DSC)、Brabender 糊化仪(BV)和 Brookfield R/S Plus 流变仪测定了芭蕉芋淀粉的热力学特性;在此基础上,采用普鲁兰酶水解,进一步研究了酶解淀粉的体外消化特 性。结果表明:5 g 芭蕉芋淀粉溶于 100 mL 蒸馏水得到淀粉乳,其糊化温度是 65 ℃~67 ℃,黏度急剧升高时的温度为75 ℃,峰值黏度为 429.3 BU。经 100 U/g 普鲁兰酶水解后的淀粉,快速消化淀粉的含量由 88.2 %减少到 59.0 %,缓慢消化 淀粉的含量由 8.5 %增加到 16.9 %; 酶解淀粉直链淀粉的含量由 12.8 %增加到 18.1 %、 支链淀粉含量由 86.8 %下降到79.9 %,可能是其具有较低的消化率的部分原因。
Abstract:In order to investigate the properties of processing and nutrition of canna starch, instrumental analy- sis by Differential Scanning Calorimetry (DSC), Brabender Micro Visco-Amylo-Graph (BV) and Brookfield R/S Plus rheometer, and pullulanase hydrolysis were performed in this study. The results showed that 5 g canna starch was dissolved in 100 mL distilled water to obtain starch milk, and the gelatinization temperature of canna starch was 65 ℃-67 ℃. The viscosity increased greatly at 75 ℃. The max/mum viscosity of starch slurry was 429.3 BU. After the starch was hydrolyzed by pullulanase at 100 U/g starch, the content of RDS decreases from 88.2 % to 59.0 %, the content of SDS increased from 8.5 % to 16.9 %. The enzymatic modified canna starch with low digestibility might be resulted from the changes of the content of amylose from 12.8 % to 18.1 % and amylopectin from 86.8 % to 79.9 %.
文章编号:201709001 中图分类号: 文献标志码:A
基金项目:国家自然科学基金面上项目(NSFC-31671801);吉林省教 育厅“十三五”科学技术研究项目(吉教科合字[2016]第 298 号);吉林 省教育厅“十三五”科学技术项目(JJKH20170502KJ)
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