Formation of resistant corn starches induced by gamma-irradiation

Jau-Shya Lee; Min-Lee Ee; Kok-Heung Chung; Zainon Othman

doi:10.1016/j.carbpol.2013.05.047

Formation of resistant corn starches induced by gamma-irradiation

Carbohydr Polym. 2013 Sep 12;97(2):614-7. doi: 10.1016/j.carbpol.2013.05.047. Epub 2013 May 27.

Authors

Jau-Shya Lee¹, Min-Lee Ee, Kok-Heung Chung, Zainon Othman

Affiliation

¹ School of Food Science and Nutrition, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia. jslee@ums.edu.my

PMID: 23911492
DOI: 10.1016/j.carbpol.2013.05.047

Abstract

The effect of gamma-irradiation on formation of resistant starch (RS) in corn starch with different amylose content was examined. Normal corn starch, waxy corn starch, and high amylose corn starch (Hylon V and Hylon VII) were irradiated at 5, 10, 25 and 50 kGy. Gamma-irradiation at 5 kGy increased the amylose-like molecules in starches and thus significantly enhanced the RS content (p<0.05). Highest RS content was produced by 50 kGy irradiated in all the starch samples (p<0.05). The irradiation-induced RS was more evident in waxy corn starch, followed by high amylose corn starch and normal corn starch.

Keywords: Apparent amylose content; Digestibility; Hylon V; Hylon VII; Normal corn starch; Waxy corn starch.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Amylose / analysis
Dose-Response Relationship, Radiation
Gamma Rays*
Microscopy, Electron, Scanning
Starch / chemical synthesis*
Starch / radiation effects*
Zea mays / chemistry*

Substances

Starch
Amylose