Department of Pomology and Apiculture, University of Agriculture in Kraków, Kraków, Poland.
J Med Food. 2013 Aug;16(8):728-32. doi: 10.1089/jmf.2012.0248. Epub 2013 Aug 1.
Cornelian cherry (Cornus mas L.), apple (Malus domestica Borkh. cultivars Jonagold and Red Boskoop), pear (Pyrus communis cv. Conference), and plum (Prunus domestica L. cv. Common Plum) juices were assayed for their quality, organic acids, polyphenol content, and antioxidant activity (determined as a ferric-reducing antioxidant power [FRAP]). Cornelian cherry juice revealed the highest titratable acidity-2.58 g malic acid/100 g. The highest polyphenol content was also noted for Cornelian cherry-45.6 mg gallic acid (GA)/g. The medium level of polyphenols was proved for Jonagold apple (22.8 mg GA1/g). The lowest level was recorded for Common Plum (9.60 mg GA/g), followed by Conference pear and Red Boskoop apple (12.3 and 21.3 mg GA/g, respectively). The FRAP values were 1.97 mmol Fe/L for Common Plum juice, 2.37 mmol Fe/L for Conference pear juice, and 3.92 mmol Fe/L for both Red Boskoop and Jonagold apple juices. However, the obtained data indicated outstanding antioxidant properties for Cornelian cherry juice. In this case, FRAP reached 23.5 mmol Fe/L. The calculated correlation coefficient FRAP versus polyphenols indicates that the antioxidant status for Cornelian cherry is not only correlated with polyphenols but also with other biological compounds. The obtained results indicated that Cornelian cherry is a valuable source of substances with a high antioxidant activity.
欧李（Cornus mas L.）、苹果（Malus domestica Borkh. 品种 Jonagold 和 Red Boskoop）、梨（Pyrus communis cv. Conference）和李（Prunus domestica L. cv. Common Plum）果汁的质量、有机酸、多酚含量和抗氧化活性（以铁还原抗氧化能力[FRAP]测定）进行了测定。欧李汁的滴定酸度最高，为 2.58 g 苹果酸/100 g。欧李的多酚含量也最高，为 45.6 mg 没食子酸（GA）/g。Jonagold 苹果的多酚含量中等，为 22.8 mg GA1/g。Common Plum 的含量最低，为 9.60 mg GA/g，其次是 Conference 梨和 Red Boskoop 苹果，分别为 12.3 和 21.3 mg GA/g。FRAP 值分别为 Common Plum 果汁 1.97 mmol Fe/L、Conference 梨果汁 2.37 mmol Fe/L 和 Red Boskoop 和 Jonagold 苹果汁均为 3.92 mmol Fe/L。然而，所得数据表明欧李汁具有出色的抗氧化性能。在这种情况下，FRAP 达到 23.5 mmol Fe/L。FRAP 与多酚的计算相关系数表明，欧李的抗氧化状态不仅与多酚有关，还与其他生物化合物有关。研究结果表明，欧李是一种具有高抗氧化活性的物质的有价值来源。
