Article (Scientific journals)
Characterization of water status and water soluble pectin from peaches under the combined drying processing
Lyu, Jian; Bi, J.; Liu, X. et al.
2019In International Journal of Biological Macromolecules, 123, p. 1172-1179
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Keywords :
Average molar mass; Degradation; Degree of esterification; Osmotic dehydration; Pectin; Article; Carboxylic Ester Hydrolases; Desiccation; Esterification; Hexuronic Acids; Magnetic Resonance Spectroscopy; Molecular Weight; Osmosis; Pectins; Polygalacturonase; Prunus persica; Solubility; Spectroscopy, Fourier Transform Infrared; Sugars; Water
Abstract :
[en] Characterization of water status and water soluble pectin (WSP) from peach were evaluated after different stage of combined drying in which osmotic dehydration (OD) was considered as the pre-treatment prior to instant controlled pressure drop (DIC) - assisted infrared radiation drying (IRD) (IR-DIC). Results showed that the contents of free water and immobilized water decreased to 0 g after the combined drying. The content of bound water increased after IRD treatment. The residual PME activity in peach slices was 153.3–179.6% after OD treatment, while, the PG were totally inactivated after IRD. The degree of esterification (DE), WSP content and average molar mass (Mw) decreased significantly (from 75.00 to 43.74, from 156.00 to 74.91 mg/g AIR and from 2.28 to 0.49 × 10 5 Da, respectively) after the combined drying. The neutral sugar of WSP was mainly composed by galactose, arabinose and rhamnose, whose contents decreased after the combined drying. However, OD treatment would slow down the degradation. There was a low peak at 1740 cm −1 in FT-IR spectrum observed for WSP after IRD and DIC treatment, which might illustrate the degradation of WSP during the combined drying. © 2018
Disciplines :
Food science
Author, co-author :
Lyu, Jian ;  Université de Liège - ULiège
Bi, J.;  Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture, Beijing, 100193, China
Liu, X.;  Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture, Beijing, 100193, China
Zhou, Mo
Chen, Q.;  Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture, Beijing, 100193, China
Language :
English
Title :
Characterization of water status and water soluble pectin from peaches under the combined drying processing
Publication date :
2019
Journal title :
International Journal of Biological Macromolecules
ISSN :
0141-8130
eISSN :
1879-0003
Publisher :
Elsevier, Netherlands
Volume :
123
Pages :
1172-1179
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Special Fund for Agro-scientific Research in the Public Interest: 201503142
Available on ORBi :
since 20 December 2021

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