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首页> 外文期刊>Food Chemistry >Photooxidation of phytosterols in oil matrix: Effects of the light, photosensitizers and unsaturation degree of the lipids
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Photooxidation of phytosterols in oil matrix: Effects of the light, photosensitizers and unsaturation degree of the lipids

机译：油基质中植物甾醇的光氧化：脂质的光，光敏剂和不饱和度的影响

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摘要

In this work we studied the stability of phytosterols in oil matrix under photooxidation (with different light intensity, existence/absence of photosensitizers and unsaturated lipids). Results revealed that the photooxidation of phytosterols fit a first order kinetic model (R-2 0.96). When the intensity of light was higher, the rate constants increased and phytosterols oxidized faster. The progress could be also accelerated by photosensitizers, whereas the unsaturated matrix inhibited the formation of oxidation products. Phytosterols oxidation products (POPs) were detected in all model matrix samples. 7 beta-hydroxy was the main oxidation products in most cases during the whole treatment under light, which represented about one third of the total phytosterol oxides, followed by 7 alpha-hydroxy, 5 beta, 6 beta-epoxy, 7-keto, 5 alpha, 6 alpha-epoxy and 6 beta-hydroxy. And the oxidation at C7 on the Ring B of steroid nucleus was the most important pathway of phytosterols photooxidation.
机译：在这项工作中，我们研究了光氧化下油基质植物甾醇的稳定性（具有不同的光强度，存在/不饱和脂质的存在/不存在）。结果表明，植物甾醇的光氧化适合一阶动力学模型（R-2> 0.96）。当光强度较高时，速率常数增加，植物甾醇氧化得更快。光敏剂也可以加速进展，而不饱和基质抑制氧化产物的形成。在所有模型基质样品中检测到植物甾醇氧化产物（POP）。 7β-羟基是主要氧化产物在大多数情况下，在光线下整个治疗过程中，其表示约三分之一的总植物甾醇氧化物，其次是7α-羟基，5β，6β-环氧树脂，7-酮，5 α，6个α-环氧和6个β-羟基。并且在类固醇核的环B上的C7氧化是植物甾醇光氧化最重要的途径。

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  • 来源
    《Food Chemistry》 |2019年第1期|162-169|共8页
  • 作者

    Zhao Yajing; Yang Bowen; Xu Tao; Wang Mengmeng; Lu Baiyi;

  • 作者单位

    Zhejiang Univ Ningbo Res Inst Fuli Inst Food Sci Coll Biosyst E Minist Agr & Rural Affairs Zhejiang Key Lab Agrof Key Lab Agroprod Nutr Evaluat Key Lab Agroprod Po Hangzhou 310058 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Res Inst Fuli Inst Food Sci Coll Biosyst E Minist Agr & Rural Affairs Zhejiang Key Lab Agrof Key Lab Agroprod Nutr Evaluat Key Lab Agroprod Po Hangzhou 310058 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Res Inst Fuli Inst Food Sci Coll Biosyst E Minist Agr & Rural Affairs Zhejiang Key Lab Agrof Key Lab Agroprod Nutr Evaluat Key Lab Agroprod Po Hangzhou 310058 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Res Inst Fuli Inst Food Sci Coll Biosyst E Minist Agr & Rural Affairs Zhejiang Key Lab Agrof Key Lab Agroprod Nutr Evaluat Key Lab Agroprod Po Hangzhou 310058 Zhejiang Peoples R China;

    Zhejiang Univ Ningbo Res Inst Fuli Inst Food Sci Coll Biosyst E Minist Agr & Rural Affairs Zhejiang Key Lab Agrof Key Lab Agroprod Nutr Evaluat Key Lab Agroprod Po Hangzhou 310058 Zhejiang Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phytosterol; Photooxidation; Light intensity; Photosensitizer; Unsaturation degree;

    机译：植物甾醇;光氧化;光强度;光敏剂;不饱和度;

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