1994
DOI: 10.1073/pnas.91.22.10475
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Indigeneity of organic matter in fossils: a test using stable isotope analysis of amino acid enantiomers in Quaternary mollusk shells.

Abstract: Comparison of the 813C values of D and L enantfomers of individual amino acids was used to evaluate the presence of amino acid contaminants in Quaternary land snals. Measurements of 813C values of amino acid D and L enantiomers determined by combined gas chromatography, combustion, isotope-ratio mass spectrometry are reported. Conventional combustion techniques, following separation of aspartic acid and glutamic acid enantiomers by liquid chromatography, were also used to determine 813C as well as 815N values.… Show more

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Cited by 37 publications
(34 citation statements)
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“…A variety of methods for organic matter extraction from both modern and fossil shell have been utilized in previous studies . For example, Hansen compared an earlier method published by Carmichael et al, which utilized 1% PtCl 2 as a catalyst for the removal of Cl − ions in 1 N HCl during decalcification with the more simple HCl hydrolysis approach similar to that used here.…”
Section: Discussionmentioning
confidence: 99%
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“…A variety of methods for organic matter extraction from both modern and fossil shell have been utilized in previous studies . For example, Hansen compared an earlier method published by Carmichael et al, which utilized 1% PtCl 2 as a catalyst for the removal of Cl − ions in 1 N HCl during decalcification with the more simple HCl hydrolysis approach similar to that used here.…”
Section: Discussionmentioning
confidence: 99%
“…AAs are also a main organic component in fossil shell, where they can be affected by two independent processes: degradation and leaching or external contamination . Total hydrolysable AAs (THAAs; those AAs that can be recovered via standard hydrolysis techniques) in fossil shell have been shown to decline over time, probably reflecting both these processes . At the same time, as in sediments and other detrital organic pools, those AAs which remain can be transformed by bacterial degradation: non‐protein AA degradation products (e.g., beta‐alanine) can be formed, while most are remineralized.…”
Section: Discussionmentioning
confidence: 99%
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“…In contrast, few studies have investigated the possibility of isotopic fractionation occurring during the hydrolytic cleavage of amino acids from their parent peptides or proteins. Acid hydrolysis using 6 M HCl heated to between 100 and 120°C for 24 h has been adopted by the majority of researchers in order to liberate free amino acids from peptides and proteins for both preparative HPLC and GC/C/IRMS analyses 27,28,32,33,35–37. Metges and Daenzer27 investigated the effects of this acid hydrolysis procedure on a standard amino acid mixture by measuring the δ 13 C values of its constituent amino acids with and without prior hydrolysis.…”
mentioning
confidence: 99%
“…Abelson, 1954;Florkin, 1965;Westbroek et al, 1979;Eglinton and Logan, 1991;Engel et al, 1994;Schweitzer et al, 2007), which opened the door for palaeobiochemical investigations (Blumer, 1965;Albrecht and Ourisson, 1971;Niklas and Gensel, 1976;Weiner et al, 1976;Westbroek et al,26 D. Mietchen et al: Fossil MRI Saelen, 1989;Schweitzer et al, 2005;Dunca et al, 2008;Pruvost et al, 2007;Asara et al, 2007). While a number of techniques exist that can non-destructively image the surface of a specimen (see, e.g., Saelen, 1989;Scott and Collinson, 2003), serial grinding techniques combined with digital photography have long been the only method allowing to reconstruct the three-dimensional structure of fossils at a high spatial resolution (Luo and Eastman, 1995;Luo and Marsh, 1996;Sutton et al, 2001;Siveter et al, 2004;Sutton et al, 2005), yet they trade this achievement for a complete loss of the specimen.…”
Section: Introductionmentioning
confidence: 99%