Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/7745
Title: Changes in hydrolysable and condensed tannins of pomegranate (Punica granatum L., cv. Hicaznar) juices from sacs and whole fruits during production and their relation with antioxidant activity
Authors: Muhacir-Güzel, N.
Türkyilmaz, M.
Yemiş, Oktay
Tagi, T.
Özkan, M.
Keywords: Cold clarification
Ellagic acid
Pasteurization
Punicalagin
Yield
Clarifiers
Flavonoids
Fruits
Tannins
Antioxidants
Anti-oxidant activities
Condensed tannins
Polyphenol content
Pomegranate juices
Punica granatum
Strong correlation
Plants (botany)
Lythraceae
Publisher: Academic Press
Abstract: The effects of clarification and pasteurization on hydrolysable tannins (HTs), condensed tannins (CTs) and antioxidant activities of pomegranate juices extracted from whole fruits and sacs were investigated. Tannin contents (53-85%) and antioxidant activities (18%) in juice from whole fruits (JFWF) were found higher than those in juice from sacs (JFS). In both juice samples, clarification led to significant decreases (15-74%) in total polyphenol, HT and CT contents as well as antioxidant activities, whereas pasteurization (1-52%) led to the increases, except for the CT contents. Similar to pasteurization, HT contents also increased (r = 0.956) as the pressure and time increased during pressing. Punicalin, ?-punicalagin, ß-punicalagin and ellagic acid hexoside were the major HTs in pomegranate juices. Among HTs, ellagic acid hexoside was the major HT in JFWF, whereas ß-punicalagin was the major one in JFS. ß-punicalagin was the most susceptible HT to clarification. Strong correlations were found between antioxidant activity values with total polyphenol contents (r = 0.824-0.926), and total HTs contents (r = 0.775-0.994) and CT contents (r = 0.592-0.956). Antioxidant activity of JFWF resulted mainly from HTs (r = 0.994), while that of JFS resulted mainly from CTs (r = 0.956). © 2014 Elsevier Ltd.
URI: https://hdl.handle.net/11499/7745
https://doi.org/10.1016/j.lwt.2014.07.025
ISSN: 0023-6438
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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