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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Release of covalently bound ferulic acid from fiber in the human colon.
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Release of covalently bound ferulic acid from fiber in the human colon.

机译：从人结肠中的纤维释放共价结合的阿魏酸。

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摘要

The solubilization of covalently bound phenolic acids during the fermentation of wheat bran in a human model colon was examined. Phenolics were only partially and relatively slowly solubilized from wheat bran, but were rapidly and fully solubilizedfrom sugar beet fibre; the levels of free ferulic acid in fermentation liquors remained very low and did not reflect the amounts solubilized from fibre sources. Xylanase and ferulic acid esterase activities were present. The released ferulic acid did notappear to bind noncovalently to the residual wheat bran fibre. Thus, fermentation in the gut alters the partition of esterified phenolic acids from the insoluble residue and the soluble fraction, where microbial ferulic acid esterase(s) can potentiallyyield free ferulic acid.
机译：检查了在人类模型结肠中麦麸发酵过程中共价结合的酚酸的增溶作用。酚类仅从麦麸中部分和相对缓慢地溶解，但从甜菜纤维中迅速而完全地溶解。发酵液中游离阿魏酸的含量仍然很低，不能反映从纤维来源中溶解的量。存在木聚糖酶和阿魏酸酯酶活性。释放的阿魏酸似乎未与残留的麦麸纤维非共价结合。因此，肠道中的发酵改变了酯化酚酸从不溶残基和可溶部分中的分配，其中微生物阿魏酸酯酶可以潜在地产生游离阿魏酸。

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