flaggy
发表于 2025-3-23 11:01:46
https://doi.org/10.1057/9781137318107icating the presence of an aliphatic polymer, as often encountered in fossil arthropods. Cuticles matured after lipid extraction and hydrolysis did not show the presence of these alkane/alk-1-ene homologues providing direct experimental evidence that lipids incorporated from the cuticle were the source of the aliphatic polymer.
数量
发表于 2025-3-23 16:57:36
https://doi.org/10.1057/9781137318107s from the same deposit also show a dominant aliphatic macromolecular component, likely derived predominantly by crosslinking of free lipid precursors. Differences in the relative distribution of molecular components indicate likely chemosystematic differences between different fossil groups.
Iniquitous
发表于 2025-3-23 19:09:14
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gastritis
发表于 2025-3-24 00:46:25
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Creditee
发表于 2025-3-24 03:24:07
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Gleason-score
发表于 2025-3-24 07:03:02
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鞠躬
发表于 2025-3-24 11:54:57
Law and Diplomacy in Commodity Economicsy decayed . leaves revealed that guaiacyl lignin units and cellulose were degraded more relative to vinyl phenol (the last being the primary pyrolysis product of cutin and plant cuticles) suggesting that cutin is likely more stable than lignin and cellulose during early diagenesis contrary to some p
胖人手艺好
发表于 2025-3-24 18:33:20
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fetter
发表于 2025-3-24 22:35:34
Law and Diplomacy in Commodity Economicsres them to their modern equivalents. Chemical analyses of the fossil leaves revealed the presence of a recalcitrant (non-hydrolysable) geopolymer comprised of benzene derivatives, lignin-derived components, pristenes and an aliphatic component; the latter consists partly of fatty acyl subunits rang
Substance-Abuse
发表于 2025-3-25 01:10:27
https://doi.org/10.1057/9781137318107ces of chitin. These weevil cuticles show excellent morphological and ultrastructural preservation. Plant cuticle is also preserved but it is obscured or distorted by diatom impressions. Molecular analysis of dicotyledonous angiosperm leaf from the Enspel deposit revealed the presence of polysacchar