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Wang C, Liu Y, Xu L, Xin C, Tan Z, Zhang X, Ma C, Chen S, Li H. Changes of the main components, physicochemical properties of distiller's grains after extrusion processing with focus on modification mechanism. Food Chem 2022; 390:133187. [PMID: 35569400 DOI: 10.1016/j.foodchem.2022.133187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 05/03/2022] [Accepted: 05/06/2022] [Indexed: 11/16/2022]
Abstract
Distiller's grains (DGs) possessed great potential utilization value due to their rich active ingredients. However, its utilization efficiency was limited by the large amount of lignocellulose components and water-insoluble proteins. In this work, single screw extrusion was applied to modify physicochemical properties of DGs. Results indicated that extruded distiller's grains (EDGs) exhibited the lower crude fiber content (26.01%), the higher soluble fiber (9.07%) and the smaller particle size when compared with those of Control, and subsequently achieving the increased bulk density, swelling capacity and water/oil holding capacity. The crude protein in EDGs decreased slightly, while the total amount of acid hydrolyzed amino acids showed a significant increase. Additionally, the looser, coarser and fragmentary microstructure of EDGs were observed. The main macromolecules in EDGs had been modified distinctly based on thermal analysis, crystallinity and functional groups analyses, while the possible schematic diagram was conducted to better understand the modification mechanism.
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Affiliation(s)
- Chenjie Wang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China; Shandong Bandaojing Co, Ltd, Zibo 256300, Shandong, China
| | - Yao Liu
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China
| | - Ling Xu
- Shandong Bandaojing Co, Ltd, Zibo 256300, Shandong, China
| | - Chunhui Xin
- Shandong Bandaojing Co, Ltd, Zibo 256300, Shandong, China
| | - Zhen Tan
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China
| | - Xin Zhang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China
| | - Chengye Ma
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China
| | - Shanfeng Chen
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China
| | - Hongjun Li
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China.
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