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Phenolic compounds and antioxidant activity of lingonberry (Vaccinium vitis-idaea L.) leaf, stem and fruit at different harvest periods
Food Chemistry ( IF 8.5 ) Pub Date : 2018-01-09 , DOI: 10.1016/j.foodchem.2018.01.052
Oana-Crina Bujor , Christian Ginies , Valentin I. Popa , Claire Dufour

Fruits and aerial parts of lingonberry could be better developed as dietary supplements if the composition in bioactive phenolic compounds and the best period for collection were known. UPLC/MS analysis revealed the predominant presence of arbutin in leaf and that of flavanols in stems harvested in May, July and September. Anthocyanins, flavanols and benzoic acid derivatives were equally present in fruits. Stem and leaf are highly homologous with (+)-catechin, A- and B-type dimers/trimers, and two quercetin glycosides as major contributors. No or only weak seasonal variations were highlighted for all phenolic classes. Additionally, flavanol oligomers showed a lower mDP for fruit (3–4) than for stem and leaf (4–6). The rate of A-type linkage was 3–5% with A-type subunits in extension mainly. Finally, the content in phenolic compounds (UPLC) correlated well with TPC and the DPPH radical scavenging activity although leaf and stem constituents reacted differently in both antioxidant tests.



中文翻译:

酚类化合物和越橘的抗氧化活性(越桔L.)的叶,茎和在不同时期收获果实

如果已知生物活性酚类化合物的组成和最佳收集期,则可以将越橘的水果和空中部分作为膳食补品更好地开发。UPLC / MS分析显示,在5月,7月和9月收获的茎中主要存在熊果苷和黄烷醇。花色苷,黄烷醇和苯甲酸衍生物同样存在于水果中。茎和叶与(+)-儿茶素,A和B型二聚体/三聚体以及两个槲皮素糖苷是主要同源物,具有高度同源性。对于所有酚类,没有或只有较弱的季节性变化被突出显示。此外,黄烷醇低聚物显示出的水果(3-4)的mDP低于茎和叶(4-6)的mDP。A型连锁的发生率为3-5%,其中A型亚基延伸。最后,

更新日期:2018-01-09
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