Effects of Ball-milling Treatment on the Structural Properties of Rice Protein and Its Improvement on the Production of Antioxidant Peptides using Enzymatic Hydrolysis

LIU Tian; XU Zhihan; CHAI Qingtian; YU Zhenyu; LI Chunyang; WANG Naifu

doi:10.13386/j.issn1002-0306.2024040105

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LIU Tian, XU Zhihan, CHAI Qingtian, et al. Effects of Ball-milling Treatment on the Structural Properties of Rice Protein and Its Improvement on the Production of Antioxidant Peptides using Enzymatic Hydrolysis[J]. Science and Technology of Food Industry, 2025, 46(8): 1−8. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024040105.

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Effects of Ball-milling Treatment on the Structural Properties of Rice Protein and Its Improvement on the Production of Antioxidant Peptides using Enzymatic Hydrolysis

LIU Tian^{1, 2,},
XU Zhihan^{1, 2},
CHAI Qingtian^{1, 2},
YU Zhenyu^{1, 2},
LI Chunyang^3, ,,
WANG Naifu^{1, 2, ,}

1.
College of Tea and Food Science, Anhui Agricultural University, Hefei 230036, China
2.
Key Laboratory of Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utiuzation of Characteristic Agricultural Products, Hefei 230036, China
3.
Institute of Agro-Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China

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Received Date: April 08, 2024
Available Online: February 10, 2025

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Abstract

Abstract

In order to improve the solubility, antioxidant activity and other functional properties of rice protein, rice protein was pretreated by ball-milling, and its structural properties were analyzed by determining the particle size, subunit composition, free sulfhydryl content and surface hydrophobicity. Meanwhile, the properties of rice peptides prepared by ball-milling combined enzymatic hydrolysis were also investigated by determining the solubility, hydrolysis degree, and in vitro antioxidant activity. Results showed that the particle size of rice protein decreased with the extension of the ball-milling treatment time. SDS-PAGE showed the subunits of rice protein did not change significantly after ball-milling treatment. At the same time, the free sulfhydryl content increased firstly, then decreased and reached a maximum value (3.32 µmol/g) at 10 min of ball milling treatment. The surface hydrophobicity of rice protein increased significantly (P<0.05) with the extension of the ball-milling treatment time. FTIR analysis indicated changes in the secondary structure of the rice protein due to ball-milling, and scanning electron microscopy revealed the formation of fragmented particles. In addition, compared with the rice protein only treated by enzymatic enzyme hydrolysis, ball-milling combined with enzymatic hydrolysis treatment significantly (P<0.05) increased hydrolysis degree which increased from 6.5% to 11%, the solubility and antioxidant activity of rice protein. Results indicated that ball-milling pretreatment significantly (P<0.05) altered the structural properties of rice protein and promoted its enzymatic hydrolysis in the production of antioxidant peptides.
- rice protein,
- ball-milling,
- structural properties,
- enzymatic hydrolysis,
- antioxidant activity

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