Effect of Tempering on Granule Size Distribution and Main Components of Wheat Flour

Jiangtao LIN; Mengli CHENG; Yujuan GU; Lingling SUN

doi:10.13386/j.issn1002-0306.2020070036

Volume 42 Issue 9

Apr. 2021

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Science and Technology of Food Industry > 2021 > 42(9): 25-29. > DOI: 10.13386/j.issn1002-0306.2020070036

LIN Jiangtao, CHENG Mengli, GU Yujuan, et al. Effect of Tempering on Granule Size Distribution and Main Components of Wheat Flour[J]. Science and Technology of Food Industry, 2021, 42(9): 25−29. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020070036.

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Effect of Tempering on Granule Size Distribution and Main Components of Wheat Flour

College of Grain, Oil and Food Science, Henan University of Technology, Zhengzhou 450001, China

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Received Date: July 02, 2020
Available Online: March 01, 2021

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Abstract

Abstract

Tempering is an indispensable process before wheat grinding, which can effectively improve the milling effect and quality of wheat flour. In this paper, the effects of tempering on the granule size distribution and its composition of wheat flour were investigated by changing the water content (14.5%, 15.5%, 16.5%), temperature (25, 35, 45 ℃) and way of tempering (vacuum conditioning, conventional conditioning). The results showed that with the increase of tempered water, the granule size of wheat flour first became fine and then coarse, the yield, ash, total protein, glutenin and damaged starch decreased, L* and gliadin increased, and the total starch decreased first and then increased.After increasing the tempering temperature, granule size, total starch and amylopectin of wheat flour increased gradually, while the total protein, glutenin and damaged starch decreased gradually. Compared with conventional conditioning, vacuum-conditioned wheat flour had larger overall granule size, lower content of gliadin and damaged starch, and higher content of glutenin and amylopectin. The quality of wheat flour was significantly different under different tempering conditions. When the tempering moisture and the temperature were 15.5% and 25 ℃, the granule size of wheat flour had the highest fineness, higher yield, lower ash content and better quality.
- tempering,
- granule size,
- wheat flour,
- component,
- milling quality

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