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发表于 2025-3-30 12:10:44
Wolfgang Hellmannflux from the surface to theocean‘s interior. Taking into account the effective isotopic fractionation effects for N.fixation and denitrification, the modern average δ.N for the oceanis a potentially important constraint on the modern marine nitrogen budget. Past variation inthese processes can be r
Vsd168
发表于 2025-3-30 15:03:09
Stefan Krügerynthesize a diverse range of compounds, such as branched fatty acids, hopanoids and isoprenoids, many of which are particularly stable, for instance those that contain an ether bond. Qualitative assignments of organic matter sources are thus reasonably straightforward, although even now lipids can b