By Neal S. Gupta

ISBN-10: 9400779356

ISBN-13: 9789400779358

ISBN-10: 9400779364

ISBN-13: 9789400779365

This publication offers an summary, learn compendium and an advent to the technology of molecular paleontology, together with literature evaluation for non-geochemists. Analytical equipment hired are incorporated as part of each one bankruptcy that underpin this department of paleontology and certainly geochemistry. the first usefulness of this quantity is for natural geochemists, molecular palaeontologists, and molecular archeologists. Researchers, graduate scholars and teachers drawn to astrobiology from a paleontological viewpoint can also locate this to be valuable.

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Extra info for Biopolymers: A molecular paleontology approach

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Mösle et al. (1997, 1998) and Collinson et al. (1998) sought to demonstrate the presence or absence of cutan on the basis that it should be recoverable as a residue after acid and base hydrolysis as initially documented by Nip et al. (1986b). Collinson et al. (1998) analysed leaf cuticles of modern Ginkgo biloba (previously thought to contain cutan: Nip et al. 1986b; Tegelaar et al. 1991), as well as a wide variety of modern conifers (Collinson et al. 1998), but were unable to detect cutan in the living plant cuticles despite the presence of aliphatic components in their fossil equivalents.

1984; Höld et al. 2001). Indeed, fossil leaves display a ubiquitous aliphatic composition, with little or no preservation of lignin and polysaccharides, especially in fossils older than Cenozoic (see Table 2 in Gupta et al. 2006). Cutan was not detected in the modern analogues of Metasequoia and cannot be the source of the macromolecular aliphatics (Gupta et al. 2006; de Leeuw et al. 2006). This gradation in the nature of biomolecular preservation in Metasequoia leaves is paralleled by their morphological preservation as revealed by SEM (Yang et al.

3 Partial ion chromatogram showing the pyrolysis-GC/MS analysis of modern Prunus laurocerasus leaf (a) after lipid extraction (Residue 1); and (b) lipid extraction and saponification (Residue 2). G: guaiacyl units and S: syringyl units of lignin; B2: dimethylbenzene; C16S FA: C16 saturated fatty acid, and C18SFA: C18 unsaturated fatty acid; + refers to n-alkanes and − to n-alk-1enes. Other legends same as in Fig. 2 are lacking in the pyrolysate of Residue 2. Thus, while they contain n-alkyl components, those components do not survive base hydrolysis (saponification).

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Biopolymers: A molecular paleontology approach by Neal S. Gupta

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