Journal
FOOD CHEMISTRY
Volume 160, Issue -, Pages 196-203Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.03.089
Keywords
Punica granatum L; Peel; Co-products; Valorization; Polyphenols; DPPH; Reducing power; IDF/SDF ratio; GDRI
Funding
- Islamic Development Bank
- Consejo Superior de Investigaciones Cientificas (CSIC, Spain)
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The dried powdered fruit peels of pomegranate (Punica granatum L) (Pomp) from 12 cultivars were used to extract and characterise their dietary fibre (DF) and to assess their functional and antioxidant properties. The total DF content varied between 33.10 and 62/100g. The cellulose, Klason lignin, uronic acid and total neutral sugars (NS) composition of DF was: 16.53-22.71, 20.59-41.86, 13.98-23.31 and 16.88-19.66/100 g, respectively. Arabinose and xylose were the most present NS with more than 60% of total NS content. The ratio of insoluble to soluble DF was around 1, reflecting the balanced composition of PomP's DF. Besides, PomP powder showed intermediate values for water- and oil-holding capacities: 2.31-3.53 and 2.80-4.05 mL/g, respectively, and strong retardation effect on the dialysis of glucose, reaching similar to 60%. Also, it has been shown that most of the antioxidants can be extracted, based on the strong soluble antioxidant activity (2018-2649 mu mol Trolox/g) compared to the insoluble one (13-23 mu mol Trolox/g). (C) 2014 Elsevier Ltd. All rights reserved.
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