首页> 外文期刊>Journal of Cereal Science >Identification and quantification of phenolic acids and anthocyanins as antioxidants in bran, embryo and endosperm of white, red and black rice kernels (Oryza sativa L.).
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Identification and quantification of phenolic acids and anthocyanins as antioxidants in bran, embryo and endosperm of white, red and black rice kernels (Oryza sativa L.).

机译:鉴定和定量白米,红米和黑米仁(Oryza sativa L.)的麸皮,胚和胚乳中作为抗氧化剂的酚酸和花青素。

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摘要

Whole rice grain comprising endosperm, embryo (or germ), and bran has potential beneficial health effects in addition to provision of nutrients. The distribution of phenolic acids and anthocyanins in endosperm, embryo, and bran of white, red, and black rice grains was investigated in this study. The total phenolic content (TPC) was highest in the bran, averaging 7.35 mg GAE/g and contributing 60%, 86% and 84% of phenolics in white, red and black rice. The average TPC of the embryo and endosperm were 2.79 and 0.11 mg GAE/g accounting for 17% and 23%, 4% and 10% and 7% and 9% in white, red and black rice, respectively. The antioxidant capacity determined using DPPH and ORAC displayed a trend similar to TPC. Free/conjugated phenolic acids in white, red and black rice bran accounted for 41%, 65% and 85% of total acids. Bound phenolic acids in rice bran accounted for 90% of total acids in whole grain. Cis-p-coumaric was detected in bound form in bran while cis-sinapic acid was detected in the free/conjugated form in embryo and bran. Cyanidin-3-O-glucoside and peonidin-3-O-glucoside were identified mainly in black rice bran as the total anthocyanins. Cyanindin-3-O-rutinoside was also detected in black rice bran. All rights reserved, Elsevier.
机译:包括胚乳,胚(或胚芽)和麸皮的全米谷物除了提供营养外,还具有潜在的有益健康的作用。在这项研究中,研究了酚酸和花色苷在白米,红米和黑米谷物的胚乳,胚和麸皮中的分布。麸皮中的总酚含量最高,平均为7.35 mg GAE / g,在白米,红米和黑米中分别占酚类的60%,86%和84%。胚和胚乳的平均TPC为2.79和0.11 mg GAE / g,分别占白米,红米和黑米的17%和23%,4%和10%以及7%和9%。使用DPPH和ORAC测定的抗氧化能力显示出与TPC相似的趋势。白米糠,红米糠和黑米糠中的游离/共轭酚酸分别占总酸的41%,65%和85%。米糠中结合的酚酸占全谷物中总酸的90%。在麸皮中以结合形式检测到顺式对香豆酸,而在胚胎和麸皮中以游离/结合形式检测到顺式芥子酸。 Cyanidin-3-O-葡萄糖苷和peonidin-3-O-葡萄糖苷主要在黑米糠中被鉴定为总花色苷。在黑米糠中也检测到花青素-3-O-芸香糖苷。保留所有权利,Elsevier。

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