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Influence of Moisture Content on Physicomechanical Properties, Starch-Protein Microstructure and Fractal Parameter of Oat Groats

  • Nan Zhao , Bo-wen Li , Nan Fu , Dong Li EMAIL logo , Li-jun Wang EMAIL logo and Xiao-dong Chen
Published/Copyright: May 25, 2018

Abstract

This study was performed to investigate the influence of moisture content on physicomechanical properties, starch-protein microstructure and fractal parameter of oat groats. Selected physical properties were determined as a function of moisture content. The results showed that moisture content had a significant effect on these characteristics. Majority of physical properties increased linearly with moisture content ranged from 11.8 % to 27.0 %, while mechanical properties decreased nonlinearly as third power function in the above range. Moreover, the increasing granule size, less gaps and more contact points can be observed in the microstructure of starch-protein network with high moisture. Meanwhile, high moisture content also resulted in that fractal parameter of oat section increased from 2.6891 to 2.8001 significantly. These moisture-dependent characteristics are useful in further study of oat groats and the heuristic methods used in this study may be extrapolated to other varieties of cereal.

Funding statement: This research was supported by The National Key Research and Development Program of China (2016YFD0701801) and Commonweal Guild Grain Scientific Research Program of China (201513004).

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Received: 2017-11-28
Revised: 2018-04-25
Accepted: 2018-05-14
Published Online: 2018-05-25

© 2018 Walter de Gruyter GmbH, Berlin/Boston

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