Comparative evaluation of drying methods on kinetics, biocompounds and antioxidant activity of Bacillus subtilis-fermented dehulled adlay

The effects of five drying methods on kinetics, biocompounds and antioxidant activity of Bacillus subtilis-fermented dehulled adlay (BDA) were evaluated in this study. The Page model (MR = ) was the best-fit model to describe the drying kinetics of all dried BDA. The shortest drying time and highest...

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Bibliographic Details
Published inDrying technology Vol. 38; no. 11; pp. 1505 - 1515
Main Authors Wen, Anyan, Xie, Chunzhi, Mazhar, Muhammad, Zhu, Yong, Zeng, Haiying, Qin, Likang, Zhu, Yi
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 03.08.2020
Taylor & Francis Ltd
Subjects
antioxidant activity
Antioxidants
Bacillus subtilis
biocompounds
Dehulled adlay
Drying agents
drying kinetics
Flavonoids
Kinetics
Phenols
Vacuum drying
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Summary:The effects of five drying methods on kinetics, biocompounds and antioxidant activity of Bacillus subtilis-fermented dehulled adlay (BDA) were evaluated in this study. The Page model (MR = ) was the best-fit model to describe the drying kinetics of all dried BDA. The shortest drying time and highest drying rate were observed in microwave-vacuum drying (MVD). The highest contents of tetramethylpyrazine (TMP), γ-aminobutyric acid (GABA), triterpenoids, coixol, and coixan were detected in freeze-vacuum dried samples. However, the highest levels of total phenolics, flavonoids, and antioxidant activity were found in hot air-dried BDA. Moreover, higher retention ratios of TMP (71.90%), GABA (94.56%), coixol (63.38%), and coixan (94.29%), as well as the highest coixenolide content were obtained in MVD samples. In conclusion, MVD should be given first priority in large-scale industrial practice due to shorter drying time and high health-beneficial components.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2019.1648292