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Effects of different extrusion temperatures on extrusion behavior, phenolic acids, antioxidant activity, anthocyanins and phytosterols of black rice

机译：不同挤出温度对黑稻挤出行为，酚酸，抗氧化活性，花皂苷素和植物甾醇的影响

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摘要

Different extrusion temperatures (90, 100, 110, and 120 degrees C) were used to investigate changes in the expansion ratios, die pressures, phytochemical contents and antioxidant activities of extrusion products of black rice. The results showed that the die pressure significantly decreased with the increasing extrusion temperature, and the expansion ratio reached a peak value at 100 degrees C. The soluble-free and total phenolic acid contents gradually increased, whereas portions of soluble-free and soluble-conjugated phenolic acids transformed into insoluble-bound phenolic acids. The soluble-free (52.45) and insoluble-bound (73.59 mg GAE/100 g DF) total phenolic contents (TPC) reached peak values at 110 degrees C. The soluble-conjugated TPC values remained similar. Antioxidant activity occurred at higher levels in the range from 100 degrees C to 120 degrees C. The anthocyanin content decreased after extrusion possibly because some anthocyanin remained in the residue after extraction and could not be completely extracted. The content of free sterols increased from 90 degrees C to 110 degrees C and decreased at 120 degrees C. However, the content of bound sterols showed an opposite trend and reached a minimum value at 110 degrees C.
机译：使用不同的挤出温度（90,100,110和120℃）来研究膨胀比，压力压力，植物化学含量和黑米挤出产物的抗氧化活性的变化。结果表明，随着挤出温度的增加，模芯压力显着降低，膨胀率在100℃下达到峰值。可溶性和总酚酸含量逐渐增加，而无可溶性和可溶性缀合的部分酚酸转化成不溶性酚醛酸。无溶于（52.45）和不溶性结合（73.59mg / 100g DF）总酚含量（TPC）在110℃下达到峰值。可溶性共轭的TPC值保持相似。抗氧化活性在100摄氏度至120℃的范围内发生抗氧化活性。挤出后，花青素含量可能降低，因为一些花青素在萃取后残留在残留物中，不能完全提取。自由甾醇的含量从90℃升高至110℃，并在120℃下降低。然而，结合甾醇的含量显示相反的趋势并在110℃下达到最小值。

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  • 来源
    《RSC Advances》 |2018年第13期|共10页
  • 作者

    Hu Zhanqiang; Tang Xiaozhi; Zhang Ming; Hu Xianqiao; Yu Chen; Zhu Zhiwei; Shao Yafang;

  • 作者单位

    China Natl Rice Res Inst Minist Agr Rice Prod Qual Supervis &

    Inspect Ctr Hangzhou 310006 Zhejiang Peoples R China;

    Nanjing Univ Finance &

    Econ Coll Food Sci &

    Engn Nanjing 210046 Jiangsu Peoples R China;

    Jiangsu Grain &

    Oil Commod Trade Market Nanjing 210003 Jiangsu Peoples R China;

    China Natl Rice Res Inst Minist Agr Rice Prod Qual Supervis &

    Inspect Ctr Hangzhou 310006 Zhejiang Peoples R China;

    Nanjing Univ Finance &

    Econ Coll Food Sci &

    Engn Nanjing 210046 Jiangsu Peoples R China;

    China Natl Rice Res Inst Minist Agr Rice Prod Qual Supervis &

    Inspect Ctr Hangzhou 310006 Zhejiang Peoples R China;

    China Natl Rice Res Inst Minist Agr Rice Prod Qual Supervis &

    Inspect Ctr Hangzhou 310006 Zhejiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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