Preparation of resistant starch by dual modified method from indica rice starch

Resistant starch (RS) is defined as the part of the total starch that resists hydrolysis and absorption in the small intestine. RS has been proved to be beneficial to human health. Biochemical modification is also an effective way to prepare RS. In this study, we prepared RS from Indica rice starch...

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Bibliographic Details
Published in:Current topics in nutraceuticals research 2015-11, Vol.13 (4), p.173
Main Authors: Wang, Wen-Juan, Yuan, Huai-Bo, Chen, De-Yi, Meng, Shao-Hua, Zhu, Xi-Ping
Format: Article
Language:English
Subjects:
Binding sites
Hydrogen bonds
Methods
Nutrient interactions
Nutritional aspects
Physiological aspects
Properties
Rice
Starch
Studies
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Summary:Resistant starch (RS) is defined as the part of the total starch that resists hydrolysis and absorption in the small intestine. RS has been proved to be beneficial to human health. Biochemical modification is also an effective way to prepare RS. In this study, we prepared RS from Indica rice starch using thermal treatment and dual-enzymatic (α-amylase and pullulanase) modification. Hydrolysis by increasing concentrations of α-amylase (0, 2, 4, 6, 8 and 10 U×g-1) was evaluated at increasing temperatures from 50 to 100°C, and pH between 4.5 and 7.0 for 10 to 60 min. The optimal conditions for hydrolysis was 6 U×g-1 α-amylase at 80 °C for 40 min with pH adjusted to 5.5. Under these conditions, the RS yield was 45.3%. Moreover, the RS product obtained under these conditions exhibited a lower hydrolysis rate than other starch samples.
ISSN:1540-7535
2641-452X