کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1220525 | 967788 | 2012 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Flavonoid constituents and antioxidant capacity in flowers of different Zhongyuan tree penoy cultivars Flavonoid constituents and antioxidant capacity in flowers of different Zhongyuan tree penoy cultivars](/preview/png/1220525.png)
Flavonoid components in flowers of 48 Zhongyuan tree penoy cultivars were identified by means of a hyphenated technique of HPLC coupled with a photodiode array detection and electrospray ionization mass spectrometry (HPLC-DAD-ESIMS). The total phenolic content (TPC) was determined by Folin–Ciocalteu method and the antioxidant activity with both 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. About 14 flavonoids including five anthocyanins, three flavonol glycosides and six flavone glycosides were described. Apigenin-pento-hexoside and Apigenin-hexo-glucuronide were reported for the first time. TPC, expressed as gallic acid content, varied between 3.97 and 21.73 mg/g fresh weight. Antioxidant activity varied among the cultivars (7.66–31.36 and 4.80–17.87 mg ascorbic acid equivalents/g fresh weight for DPPH and FRAP assays, respectively) and highly corresponded with TPC.
► Flavonoid components in flowers of Zhongyuan tree penoy cultivars were identified.
► The total phenolic content (TPC) and the antioxidant activity were determined.
► About 14 flavonoids were described.
► TPC varied between 3.97 and 21.73 mg/g fresh weight.
► Antioxidant activity varied among the cultivars and highly corresponded with TPC.
Journal: Journal of Functional Foods - Volume 4, Issue 1, January 2012, Pages 147–157