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Lei X, Xu J, Han H, Zhang X, Li Y, Wang S, Li Y, Ren Y. Fine molecular structure and digestibility changes of potato starch irradiated with electron beam and X-ray. Food Chem 2024; 439:138192. [PMID: 38091788 DOI: 10.1016/j.foodchem.2023.138192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/25/2023] [Accepted: 12/08/2023] [Indexed: 01/10/2024]
Abstract
The change of digestibility of starch irradiated with different types from the perspective of fine structure is not well understood. In this work, the change of internal structure, molecular weight and chain-length distribution, helical structure, lamellar structure, fractal structure and digestibility of native and treated potato starch with electron beam and X-ray was analyzed. Two irradiations caused the destruction of internal structure, the disappearance of growth rings and increase of pores. Irradiation degraded starch to produce short chains and to decrease molecular weight. Irradiation increased double helical content and the thickness and peak area of lamellar structure, resulting in the reorganization of amylopectin and increase of structure order degree. The protected glycosidic linkages increased starch resistance to hydrolase attack, thereby enhancing the anti-digestibility of irradiated starch. Pearson correlation matrix also verified the above-mentioned results. Moreover, X-ray more increased the anti-digestibility of starch by enhancing ability to change fine structure.
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Affiliation(s)
- Xiaoqing Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Jiayi Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Hui Han
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Xiaolu Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Yihan Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Shuo Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Yali Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Yamei Ren
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory for Food Nutrition and Safety Control of Xinjiang Production and Construction Corps, School of Food Science and Technology, Shihezi University, Shihezi, Xinjiang 832003, PR China.
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