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首页> 外文学位 >Chlorophyll-sensitized photooxidation and protective effect of carotenoids on five-membered heterocyclic flavor compounds and soybean oil.
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Chlorophyll-sensitized photooxidation and protective effect of carotenoids on five-membered heterocyclic flavor compounds and soybean oil.

机译：叶绿素致敏的光氧化作用和类胡萝卜素对五元杂环风味化合物和大豆油的保护作用。

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摘要

Conjugated five-membered heterocyclic compounds including 2-ethylfuran, 2-furfural, 2-acetylfuran, 5-hydroxymethyl-2-furfural (HMF), 2-ethylthiophene, 2-formylthiophene, 2-acetylthiophene, 2-ethylpyrrole, 2-formylpyrrole, 2-acetylpyrrole, 2,4,5-trimethyloxazole, and 2,4,5-trimethylthiazole in absolute alcohol containing chlorophyll were bubbled with oxygen under light. The photooxidation reactivity of these compounds, which was measured by a high performance liquid chromatographic method, was as follows: 2-ethylpyrrole ;The chlorophyll-sensitized photooxidation products of 2,5-dimethyl-4-hydroxy-3(2H)-furanone or DMHF (including ethylpyruvate, ethyllactate, acetic acid, ethyl-2-acetoxypropionate, acetoxyacetone, 1,2-ethanediol, acetoxy-2,3-butanedione, 2-oxopropyl-2-acetoxypropionate, lactic acid, and 2-acetoxypropionic acid), 2-ethylfuran (including 5-ethyl-5-ethoxy-2(2H)-furanone), pyrrole (including 1H-pyrrole-2,5-dione and 5-ethyl-5-ethoxy-1H-pyrrole-2-one), 2,4,5-trimethyloxazole (including diacetylformamide and triacetamide), and 2,4,5-trimethylthiazole (including acetamide, 2,4,5-trimethyloxazole, diacetylformamide, N-acetyl-2-imino-3-butanone, acetylthioacetamide, and diacetylthioacetamide) were identified using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Possible formation mechanisms for these products are postulated.;The antioxidative effect of capsanthin, ;The steady-state kinetics study of capsanthin on the chlorophyll-sensitized photooxidation of soybean oil showed that capsanthin quenched singlet oxygen and its quenching rate constant was
机译：共轭五元杂环化合物，包括2-乙基呋喃，2-糠醛，2-乙酰基呋喃，5-羟甲基-2-糠醛（HMF），2-乙基噻吩，2-甲酰基噻吩，2-乙酰基噻吩，2-乙基吡咯，2-甲酰基吡咯，在光下用氧气鼓泡含叶绿素的无水乙醇中的2-乙酰基吡咯，2,4,5-三甲基恶唑和2,4,5-三甲基噻唑。通过高效液相色谱法测量的这些化合物的光氧化反应性如下：2-乙基吡咯； 2,5-二甲基-4-羟基-3（2H）-呋喃酮或叶绿素敏化的光氧化产物；或DMHF（包括丙酮酸乙酯，乳酸乙酯，乙酸，-2-乙酰氧基丙酸乙酯，乙酰氧基丙酮，1,2-乙二醇，乙酰氧基-2,3-丁二酮，2-氧丙基-2-乙酰氧基丙酸酯，乳酸和2-乙酰氧基丙酸）， 2-乙基呋喃（包括5-乙基-5-乙氧基-2（2H）-呋喃酮），吡咯（包括1H-吡咯-2,5-二酮和5-乙基-5-乙氧基-1H-吡咯-2-酮） ，2,4,5-三甲基恶唑（包括二乙酰甲酰胺和三乙酰胺）和2,4,5-三甲基恶唑（包括乙酰胺，2,4,5-三甲基恶唑，二乙酰甲酰胺，N-乙酰基-2-亚氨基-3-丁酮，乙酰硫基乙酰胺，和二乙酰基硫代乙酰胺）用气相色谱（GC）和气相色谱-质谱（GC-MS）进行鉴定。推测了这些产物的可能形成机理。辣椒红素的抗氧化作用；辣椒红素对大豆油叶绿素敏化光氧化的稳态动力学研究表明，辣椒红素可以猝灭单线态氧，其猝灭速率常数为

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  • 作者

    Chen, Chung-Wen.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Agriculture Food Science and Technology.
  • 学位 Ph.D.
  • 年度 1996
  • 页码 158 p.
  • 总页数 158
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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