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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Effect of selenium on increasing the antioxidant activity of tea leaves harvested during the early spring tea producing season.
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Effect of selenium on increasing the antioxidant activity of tea leaves harvested during the early spring tea producing season.

机译：硒对提高早春茶叶生产季节收获的茶叶抗氧化活性的影响。

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This research was to determine the effect of foliar application of selenium on increasing the antioxidant activity of tea harvested during the early spring tea producing season using a alpha,alpha-diphenyl-beta-picrylhydrazyl (DPPH) radical scavenging method and the linoleic acid system. The results showed that the radical scavenging ability of the tea extracts followed this order during the first 60 min: selenium-enriched tea obtained by fertilization with selenate > BHT > selenium-enriched tea obtained by fertilization with selenite > alpha-tocopherol > regular tea. Se-enriched tea obtained by fertilization with selenate exhibited the highest inhibition percentage of 84.29% at 30 min. Se-enriched tea extracts provided higher hydrogen-donating capabilities than regular tea and contrasts with BHT and alpha-tocopherol at the concentration of 100 microg of solids/mL of ethanol. There was a little change in the sequence of radical scavenging ability during the later 60 min: Se-enriched tea obtained by fertilization with selenate > Se-enriched tea obtained by fertilization with selenite > BHT > regular tea > alpha-tocopherol. The individual activity of tea extracts and references measured by the linoleic acid system showed that the tea extracts, BHT, and alpha-tocopherol manifested almost the same patterns of activity as the DPPH method. Tea enriched in selenium by fertilization with selenate still exhibited the highest inhibition activity of lipid oxidation, whereas alpha-tocopherol showed the lowest inhibition. The antioxidant activity of Se-enriched green tea harvested during the early spring tea producing season is enhanced compared to regular tea.
机译：本研究旨在使用α，α-二苯基-β-picylhydrazyl（DPPH）自由基清除法和亚油酸体系确定叶面施用硒对提高早春茶叶生产季节采收茶的抗氧化活性的影响。结果表明，在最初的60分钟内，茶提取物的自由基清除能力遵循此顺序：用硒酸盐> BHT施肥获得的富硒茶>用亚硒酸盐>α-生育酚>普通茶施肥获得的富硒茶。通过硒酸盐施肥获得的富硒茶在30分钟时表现出最高的抑制百分比，为84.29％。富硒茶提取物的供氢能力高于普通茶，在固体含量为100微克/毫升的乙醇中与BHT和α-生育酚形成对比。在随后的60分钟内，自由基清除能力的顺序几乎没有变化：通过硒酸盐施肥获得的富硒茶>通过亚硒酸盐施肥获得的富硒茶> BHT>普通茶>α-生育酚。通过亚油酸系统测量的茶提取物和参考物质的单独活性表明，茶提取物，BHT和α-生育酚表现出与DPPH方法几乎相同的活性模式。通过与硒酸盐施肥富硒的茶仍显示出最高的脂质氧化抑制活性，而α-生育酚则显示出最低的抑制活性。与普通茶相比，在早春茶生产季节收获的富硒绿茶的抗氧化活性得到增强。

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