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Stability of Pomegranate Polyphenols in Dairy Based Functional Food: Antioxidant activity of pomegranate (Punica granatum L.) polyphenols and their stability in probiotic yoghurt

Stability of Pomegranate Polyphenols in Dairy Based Functional Food: Antioxidant activity of pomegranate (Punica granatum L.) polyphenols and their stability in probiotic yoghurt

von Amir Arjmand
Taschenbuch - 9783848480807
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Beschreibung

The main objective of this study was to characterize the antioxidant properties of Australian-grown 'Wonderful' pomegranate juice (WPJ) in comparison to those reported in the literature and imported pomegranate juices (IPJs). Total phenolic compounds (TPC) and antioxidant (AA) activity in the WPJ were found to be 2,400±200 mg/L GAE (Gallic acid equivalent) and 11±1 TEAC (Trolox® equivalent antioxidant capacity), respectively. While four brands of IPJs showed TPC levels in the range of 1,000-2,800 mg/L GAE and AA range of 5.5-14.5 TEAC. In an attempt to further improve the TPC levels in fresh juice different parts of the fruit were used for juice extraction using six different extraction methods. The extracted juices showed different yield, colour, soluble solids, titratable acidity, TPC and antioxidant levels. To further facilitate the consumers' access to the health benefits of pomegranate, probiotic yoghurt supplemented with different levels of WPJ concentrate (50 ºBrix) was developed. The maximum level of supplementation without adversely affecting product attributes and probiotic count was 6 % while maintaining maximum antioxidant activity in the product during its shelf life.

Details

Verlag LAP Lambert Academic Publishing
Ersterscheinung Mai 2012
Maße 228 mm x 154 mm x 15 mm
Gewicht 221 Gramm
Format Taschenbuch
ISBN-13 9783848480807
Auflage Nicht bekannt
Seiten 136

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