Contamination Studies on Mollusk Shell Samples
نویسندگان
چکیده
منابع مشابه
Carbon isotopes in mollusk shell carbonates
Mollusk shells contain many isotopic clues about calcification physiology and environmental conditions at the time of shell formation. In this review, we use both published and unpublished data to discuss carbon isotopes in both bivalve and gastropod shell carbonates. Land snails construct their shells mainly from respired CO2, and shell δC reflects the local mix of C3 and C4 plants consumed. S...
متن کاملThe formation and mineralization of mollusk shell.
In the last years, the field of mollusk biomineralization has known a tremendous mutation. The most recent advances deal with the nanostructure of shell biominerals, and with the identification of several shell matrix proteins: on one hand, the complex hierarchical organization of shell biominerals has been deciphered in few models, like nacre. On the other hand, although proteins represent a m...
متن کاملMollusk shell nacre ultrastructure correlates with environmental temperature and pressure.
Nacre, or mother-of-pearl, the tough, iridescent biomineral lining the inner side of some mollusk shells, has alternating biogenic aragonite (calcium carbonate, CaCO(3)) tablet layers and organic sheets. Nacre has been common in the shells of mollusks since the Ordovician (450 million years ago) and is abundant and well-preserved in the fossil record, e.g., in ammonites. Therefore, if any measu...
متن کاملCharacterization of 80-million-year-old mollusk shell proteins.
Fossil glycoproteins of the soluble organic matrix are present in an 80-million-year-old mollusk shell from the Late Cretaceous Period. Discrete molecular weight components, as determined by gel electrophoresis, are preserved. The fossil organic matrix was compared with the organic matrix of a living representative species of the same superfamily. A particular repeating amino acid sequence, fou...
متن کاملStudies on Shell Formation
Details of crystal growth in the calcitostracum of Crassostrea virginica have been studied with the purpose of analyzing the formation of the overlapping rows of oriented tabular crystals characteristic of this part of the shell. Crystal elongation, orientation, and dendritic growth suggest the presence of strong concentration gradients in a thin layer of solution in which crystallization occur...
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ژورنال
عنوان ژورنال: Radiocarbon
سال: 1985
ISSN: 0033-8222,1945-5755
DOI: 10.1017/s0033822200006913