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Industrial scale microwave processing of tomato juice using a novel continuous microwave system

Stratakos, Alexandros Ch.; Delgado-Pando, Gonzalo; Linton, Mark; Patterson, Margaret F.; Koidis, Anastasios

Authors

Gonzalo Delgado-Pando

Mark Linton

Margaret F. Patterson

Anastasios Koidis



Abstract

© 2015 Elsevier Ltd. All rights reserved. This study evaluated the effect of an industrial scale continuous flow microwave volumetric heating system in comparison to conventional commercial scale pasteurisation for the processing of tomato juice in terms of physicochemical properties, microbial characteristics and antioxidant capacity. The effect against oxidative stress in Caco-2 cells, after in vitro digestion was also investigated. Physicochemical and colour characteristics of juices were very similar between technologies and during storage. Both conventional and microwave pasteurisation inactivated microorganisms and kept them in low levels throughout storage. ABTS+ values, but not ORAC, were higher for the microwave pasteurised juice at day 0 however no significant differences between juices were observed during storage. Juice processed with the microwave system showed an increased cytoprotective effect against H2O2 induced oxidation in Caco-2 cells. Organoleptic analysis revealed that the two tomato juices were very similar. The continuous microwave volumetric heating system appears to be a viable alternative to conventional pasteurisation.

Journal Article Type Article
Publication Date Jun 11, 2016
Journal Food Chemistry
Print ISSN 0308-8146
Electronic ISSN 1873-7072
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 190
Pages 622-628
APA6 Citation Stratakos, A. C., Delgado-Pando, G., Linton, M., Patterson, M. F., & Koidis, A. (2016). Industrial scale microwave processing of tomato juice using a novel continuous microwave system. Food Chemistry, 190, 622-628. https://doi.org/10.1016/j.foodchem.2015.06.015
DOI https://doi.org/10.1016/j.foodchem.2015.06.015
Publisher URL http://doi.org/10.1016/j.foodchem.2015.06.015
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