Effect of ultrasound pretreatment on the drying kinetics and characteristics of pregelatinized kidney beans based on microwave-assisted drying

Journal article


Li, Mengge, Wang, Bo, Lv, Weiqiao and Zhao, Donglin. (2022). Effect of ultrasound pretreatment on the drying kinetics and characteristics of pregelatinized kidney beans based on microwave-assisted drying. Food Chemistry. 397, p. Article 133806. https://doi.org/10.1016/j.foodchem.2022.133806
AuthorsLi, Mengge, Wang, Bo, Lv, Weiqiao and Zhao, Donglin
Abstract

This study aimed to investigate the effects of ultrasound pretreatment combined with pulse-spouted microwave vacuum drying (PSMVD) and microwave hot air rolling drying (MHARD) on the drying characteristics, microstructure and physicochemical properties of pregelatinized kidney beans. The results showed that ultrasound pretreatment significantly improved the drying efficiency and physical properties of the samples during PSMVD and MHARD, and contributed to the formation of porous structures in the dried beans. Meanwhile, ultrasound promoted the hydrolysis of protein, free amino acids content was significantly increased by 3.69 %–11.4 %. However, the combination of ultrasound pretreatment and drying also resulted in a decreased polyphenolic content and antioxidant capacity of the dried beans. PSMVD with ultrasound for 30 min had the best color (ΔE = 14.17), the shortest drying time (50 min) and had a higher content of amino acids (206.15 mg/g) compared with other products. Overall, ultrasound pretreatment can effectively improve the drying process of kidney beans.

Keywordspulse-spouted microwave vacuum drying; microwave hot air rolling drying; pregelatinized kidney beans; microwave-assisted drying; physicochemical quality
Year2022
JournalFood Chemistry
Journal citation397, p. Article 133806
PublisherElsevier Ltd
ISSN0308-8146
Digital Object Identifier (DOI)https://doi.org/10.1016/j.foodchem.2022.133806
Scopus EID2-s2.0-85135392531
Page range1-12
FunderNational Natural Science Foundation of China (NSFC)
Publisher's version
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All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online28 Jul 2022
Publication process dates
Accepted25 Jul 2022
Deposited18 Jan 2023
Grant ID31901823
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