Impact of ultraviolet radiation treatments on the physicochemical properties, antioxidants, enzyme activity and microbial load in freshly prepared hand pressed strawberry juice
© The Author(s) 2014.
| Publié dans: | Food science and technology international = Ciencia y tecnologia de los alimentos internacional. - 1998. - 21(2015), 5 vom: 15. Juli, Seite 354-63 |
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| Auteur principal: | |
| Autres auteurs: | |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2015
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| Accès à la collection: | Food science and technology international = Ciencia y tecnologia de los alimentos internacional |
| Sujets: | Journal Article Research Support, Non-U.S. Gov't Ultraviolet radiation bioactive compounds microorganisms non-thermal processing strawberry fruit juice Anthocyanins Antioxidants Biphenyl Compounds plus... |
| Résumé: | © The Author(s) 2014. Freshly prepared, hand-pressed strawberry fruit juice was exposed to ultraviolet radiation (254 nm) at room temperature (25 ℃ ± 1 ℃) for 15, 30 and 60 min with 0 min serving as control. Results revealed decrease in pH, total soluble solids and titratable acidity, while colour parameters (L*, a* and b* values) and clarity of juice (% transmittance) increased significantly. All the results corresponded to exposure time to ultraviolet radiation. Bioactive compounds (total phenolics, ascorbic acid and anthocyanins) decreased along with a recorded reduction in polyphenol oxidase enzyme and 1,1-diphenyl-2-picryl hydrazyl radical scavenging activities, which were again dependent on exposure time. Results on the microbial studies showed significant reduction by 2-log cycles in aerobic plate count as well as in total yeast and mould counts. Though negative results were observed for certain parameters, this is the first time it was endeavoured to demonstrate the impact of ultraviolet radiation radiation on freshly prepared, hand-pressed strawberries juice |
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| Description: | Date Completed 13.08.2015 Date Revised 25.11.2016 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1532-1738 |
| DOI: | 10.1177/1082013214536708 |