新疆药桑椹营养成分分析及其体外抗氧化作用

以新疆独特的药用果桑药桑椹为研究对象，分析药桑椹鲜果中总糖等基本营养成分及总黄酮等生物活性成分，并测定其体外抗氧化能力。药桑椹鲜果中总糖、粗纤维及粗蛋白含量分别为12.9、1.28、1.17 g/100 g，明显低于对照白桑椹。药桑椹中矿物质Ca、Fe含量为113 mg/100 g和11.9 mg/100 g，分别是白桑椹的1.6 倍及1.7 倍。药桑椹中VC与总酸含量高达48.4 mg/100 g与47.1 mg/g，分别是白桑椹的8.1 倍与8.4 倍。药桑椹中总多酚、总黄酮、多糖、花青素等生物活性物质含量均明显高于白桑椹，且其体外总抗氧化能力和清除DPPH自由基能力亦显著高于白桑椹。

Nutritional Composition and in vitro Antioxidant Capacity of Black Mulberry (Morus nigra L.) Fruits from Xinjiang Province

The nutritional composition of black mulberry (Morus nigra L.) fruits in Xinjiang was analyzed, as well as the
in vitro antioxidant capacity. The total sugar, crude fiber and crude protein contents of black mulberry fruits were 12.9, 1.28
and 1.17 g/100 g, which were lower than those in white mulberry fruits (Morus alba L.). The contents of Ca and Fe in black
mulberry fruits were 113 mg/100 g and 11.9 mg/100 g, which were 1.6 and 1.7 times higher than those in white mulberry
fruits. The vitamin C and total acid contents of black mulberry were as high as 48.4 mg/100 g and 47.1 mg/g, respectively,
which were 8.1 times and 8.4 times higher than those in white mulberry fruits. The contents of total polyphenols, total
flavonoids, polysaccharides and anthocyanins from black mulberry fruits were significantly higher than those in white
mulberry fruits. Moreover, black mulberry fruits showed higher in vitro total antioxidant capacity and DPPH radical
scavenging activity than white mulberry fruits.