Journal ArticleDOI
Optical configuration and the racemisation of amino acids in sediments and in fossils — A review
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In this paper, the optical configuration of amino acids in sediments and fossils has been reviewed and the results have been used to evaluate critically the reputed occurrence of original amino acid in ancient sediments of the Mesozoic, Palaeozoic and Precambrian eras.About:
This article is published in Chemical Geology.The article was published on 1976-01-01. It has received 44 citations till now.read more
Citations
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Journal ArticleDOI
Chemical fossils: the geological fate of steroids.
TL;DR: Steroids are used to illustrate some of the significant advances that have been made in recent years in understanding the biological origin and geological fate of the organic compounds in sediments, where biological marker compounds are valuable in the assessment of sediment maturity and in correlation work.
Journal ArticleDOI
A critical evaluation of the application of amino acid racemization to geochronology and geothermometry
K. M. Williams,G. G. Smith +1 more
TL;DR: It is concluded that this is an innovative approach which will add valuable information to the scientific literature, but since the fundamental understanding of diagenetic racemization is still limited, many of the age and paleotemperature estimates which have been assigned to fossil specimens may be unreliable.
Book ChapterDOI
Racemization of Amino Acids
TL;DR: In the early part of the 20th century, the first observations of amino acid racemization in peptides and proteins in alkaline solutions at elevated temperatures were reported as discussed by the authors.
Journal ArticleDOI
Further evidence of the complexity of the racemization process in fossil shells with implications for amino acid racemization dating
R.W.L Kimber,C.V Griffin +1 more
TL;DR: Simulated aging experiments with shells of Ostrea, Anadara and Katelysia spp from Modern, Holocene and Pleistocene marine sediments in southern South Australia give further insight into the difficulties in using D L ratios of amino acids for quantitative age determinations as mentioned in this paper.
Journal ArticleDOI
Alternative kinetic models for the interpretation of amino acid enantiomeric ratios in Pleistocene mollusks: Examples from California, Washington, and Florida
TL;DR: In this paper, a nonlinear kinetic model for amino acid racemization in Pleistocene molluscan samples is compared by examination of results for samples from marine Pleistsocene deposits in California, Washington, and Florida.
References
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Journal ArticleDOI
Automatic recording apparatus for use in the chromatography of amino acids.
Journal ArticleDOI
Evidence for extraterrestrial amino-acids and hydrocarbons in the Murchison meteorite.
Keith A. Kvenvolden,James G. Lawless,Katherine Pering,Etta Peterson,Jose Flores,Cyril Ponnamperuma,Isaac R. Kaplan,Carleton B. Moore +7 more
TL;DR: Organic molecules found in meteorites seem to have been formed before the meteorites reached Earth, according to new research.
Journal ArticleDOI
Determination of d- and l-Amino Acids by Ion Exchange Chromatography as l-d and l-l Dipeptides
James M. Manning,Stanford Moore +1 more
TL;DR: A procedure for the precise determination of the d and l isomers in a given sample of an amino acid has been based upon chromatographic separation of the diastereoisomeric dipeptides obtained by derivatization with an l-amino acid N-carboxyanhydride.
Related Papers (5)
A review of the geochemical applications of the amino acid racemization reaction
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A critical evaluation of the application of amino acid racemization to geochronology and geothermometry
K. M. Williams,G. G. Smith +1 more
Amino acid racemization reactions and their geochemical implications
Jeffrey L. Bada,Roy A. Schroeder +1 more