Decrease in the Antioxidant Capacity in Beverages Containing Tea Extracts during Storage
Joint Authors
Nekvapil, Tomas
Boudny, Vladimir
Malota, Ladislav
Kopriva, Vladimir
Hostovsky, Martin
Dvorak, Petr
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-10
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
The aim of this work was to determine antioxidant capacity of beverages containing black, white, and green tea extracts using the photochemiluminescence method, and to monitor its changes based on the storage temperature and time.
Samples were stored at two different temperatures (refrigerated at 4°C and laboratory temperature 22°C), analyzed after opening of the original package, and consequently after 4 and 7 days.
Results of the antioxidant capacity are expressed as the standard equivalents, that is, ascorbic acid in mmol/L.
The highest mean value of the antioxidant capacity was found after opening of the original package in fruit-juice-enriched samples and totaled 9.793 mmol/L.
This group revealed significant dependence (P<0.05) not only on the storage time, but also temperature.
In samples without added fruit juices containing preservatives the value was 0.428 mmol/L.
This group showed significant dependence (P<0.05) on the decrease of antioxidant capacity only when based on the storage time.
Samples without fruit juices or preservatives showed significant decrease in the antioxidant capacity (P<0.05) after 4 days of storage based on the storage time.
The dependence on temperature was revealed only after 7 days of storage.
American Psychological Association (APA)
Nekvapil, Tomas& Kopriva, Vladimir& Boudny, Vladimir& Hostovsky, Martin& Dvorak, Petr& Malota, Ladislav. 2012. Decrease in the Antioxidant Capacity in Beverages Containing Tea Extracts during Storage. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-5.
https://search.emarefa.net/detail/BIM-465918
Modern Language Association (MLA)
Nekvapil, Tomas…[et al.]. Decrease in the Antioxidant Capacity in Beverages Containing Tea Extracts during Storage. The Scientific World Journal No. 2012 (2012), pp.1-5.
https://search.emarefa.net/detail/BIM-465918
American Medical Association (AMA)
Nekvapil, Tomas& Kopriva, Vladimir& Boudny, Vladimir& Hostovsky, Martin& Dvorak, Petr& Malota, Ladislav. Decrease in the Antioxidant Capacity in Beverages Containing Tea Extracts during Storage. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-5.
https://search.emarefa.net/detail/BIM-465918
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-465918