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http://dx.doi.org/10.3839/jabc.2018.032

Investigation of the changes in texture of soybean sprout depending on the heating conditions in sous-vide and conventional hot water cooking  

Lee, Yun Ju (Department of Food Science and Biotechnology, Kangwon National University)
Jung, Hwabin (Department of Food Science and Biotechnology, Kangwon National University)
Yoon, Won Byong (Department of Food Science and Biotechnology, Kangwon National University)
Publication Information
Journal of Applied Biological Chemistry / v.61, no.3, 2018 , pp. 219-226 More about this Journal
Abstract
The purpose of this study was to investigate the effect of thermal treatments, such as a sous-vide and a conventional hot water cooking, on the texture changes of soybean sprout. A novel method to measure texture properties of soybean sprout have been determined because of the irregular geometry of soybean sprout. The shape of cotyledon of bean spout was accurately analyzed using an image processing and a geometry model. To minimize the effect of the contact area on the texture measurement, a blade type of probe was selected for the measurement. True stress was evaluated to reflect the shape changes during deformation, and demonstrated that the measurement accurately distinguished the effect of thermal treatment on the texture. Different heating time (i.e., 0, 10, 20, and 30 min) was applied for both sous-vide and conventional cooking. Thermal processing caused hardening of textures for both cotyledon and hypocotyl of soybean sprout. The conventional cooking method showed higher stress values than those of sous-vide cooking. Sprouts cooked by sous-vide released the moisture after thermal processing while sprout cooked by a conventional water bath method could hold the moisture content during thermal processing. The soybean sprouts treated by conventional cooking method showed a higher score in sensory evaluation.
Keywords
Conventional cooking; Hardness; Soybean sprout; Sous-vide; True stress;
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Times Cited By KSCI : 2  (Citation Analysis)
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