PDF(Pubmed)
Abstract：
The study aims to compare the nutrient composition, antioxidant potential, and polyphenol bioaccessibility of the fruit, leaves, and pomace of black chokeberry. Phytochemical characterization, antioxidant activity, and the effect of in vitro gastrointestinal digestion on the individual phenolic compounds of fruit, leaves, and pomace of black chokeberry were assessed. Results showed that leaves had a higher content of polyphenols (61.06 mg GAE/g dw), flavonoids (8.47 mg QE/g), and tocopherols (1172.20 mg/kg) than fruit (27.99 mg GAE/g dw polyphenols, 5.23 mg QE/g flavonoids, 38.48 mg/kg tocopherols) and pomace (22.94 mg GAE/g dw polyphenols, 1.89 mg QE/g flavonoids and 157.19 mg/kg tocopherols), with superior in vitro antioxidant activity. Chlorogenic acids were the dominant phenolic compounds in black chokeberry undigested samples (2.713 mg/g in fruit, 17.954 mg/g in leaves, and 1.415 mg/g in pomace) but are poorly absorbed (bioaccessibility index in intestinal phase of 28.84% for fruit, 8.81% for leaves, and 31.90% for pomace). Hydroxybenzoic acids were highly stable in leaves and fruit during simulated digestion and had high bioaccessibility. In conclusion, residues from black chokeberry processing are also valuable sources of bioactive compounds, but the pomace had higher polyphenol bioaccessibility than leaves and might be a promising supplement for the food industry.
摘要：
这项研究旨在比较营养成分，抗氧化潜力，和水果的多酚生物可及性，叶子,和黑苦莓果渣。植物化学表征,抗氧化活性，以及体外胃肠消化对水果中单个酚类化合物的影响，叶子,和黑苦莓果渣进行了评估。结果表明，叶片中的多酚含量较高(61.06mgGAE/gdw)，黄酮类化合物（8.47mgQE/g），和生育酚（1172.20毫克/千克）比水果（27.99毫克GAE/克dw多酚，5.23mgQE/g黄酮，38.48mg/kg生育酚）和果渣（22.94mgGAE/gdw多酚，1.89mgQE/g类黄酮和157.19mg/kg生育酚），具有优越的体外抗氧化活性。绿原酸是黑莓未消化样品中的主要酚类化合物（水果中2.713mg/g，17.954毫克/克的叶子，和1.415mg/g的果渣），但吸收不良（肠道阶段的生物可及性指数为28.84％的水果，叶子为8.81%，和31.90%的果渣）。羟基苯甲酸在模拟消化过程中在叶片和果实中高度稳定，并具有较高的生物可及性。总之,来自黑苦莓加工的残留物也是生物活性化合物的宝贵来源，但是果渣比叶子具有更高的多酚生物可及性，可能是食品工业的有希望的补充。
