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首页> 外文期刊>Chinese science bulletin >Bound lipids in lacustrine sediments in Guchenghu Lake, East China
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Bound lipids in lacustrine sediments in Guchenghu Lake, East China

机译：中国东部古城湖湖相沉积物中的结合脂质

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摘要

BlOMARKERS used as indicators of the paleoclimatic and paleoenvironmental changes are required to be bio-specific in origin and be stable in the early diagenesis process. The input of plenty of land-derived organics, as well as possible changes in theearly diagenesis process, made the lipid composition of inland lacustrine sediments more complicated, and, as a result, the bio-indicating significance of some biomarkers often become obscured. Except for free lipids, bound lipids which were linked to macromolecules by ester bonds, amide bonds or ether bonds, etc., can also be extracted and separated from sediments, and their composition, source and evolutionary feature in the early diagenesis are much different from those of free lipids. Ester-bound and amide-bound lipids in lacustrine sediments from a fresh-water lake, Guchenghu Lake in East China, were analysed, their compositions were compared in the present note, and their possible sources and significance in indicating paleoclimatic and paleoenvironmental changes were discussed.
机译：BlOMARKERS用作古气候和古环境变化的指示剂，要求其起源具有生物特异性，并且在早期成岩过程中必须保持稳定。大量源自陆地的有机物的输入，以及早期成岩过程的可能变化，使得内陆湖相沉积物的脂质组成更加复杂，因此，一些生物标记物的生物指示意义经常被模糊。除游离脂质外，还可以从沉积物中提取和分离通过酯键，酰胺键或醚键等与大分子连接的结合脂质，它们在成岩初期的组成，来源和演化特征与那些游离脂质。分析了中国东部淡水湖古城湖的湖相沉积物中酯结合和酰胺结合的脂质，在本文中对它们的组成进行了比较，并讨论了它们在指示古气候和古环境变化中可能的来源和意义。 。

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