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For soils and sediments the carbon content varies greatly.
More in-depth information about old civilizations is also available due to radiocarbon dating results on bones. The organic portion is protein; the inorganic portion is the mineral hydroxyapatite, which is a combination of calcium phosphate, calcium carbonate, calcium fluoride, calcium hydroxide, and citrate.Peripheral blood polymorphonuclear cell (PMN) supernatants were also analysed accordingly and incubated with collagen to assess PGP generation ex vivo.PGP levels were measured by mass spectrometry, and PGP neutralisation was achieved with a PGP antagonist and PGP antibodies.There is no charge for the pre-screening, however please see our for dating at guidelines for selecting bones We remove the mineral component of the bones because it is not reliable for dating.We then purify the remaining material to concentrate the collagen and remove as much soil contamination as possible following the procedure given in Brown et al.
Laboratories use the protein component of bone samples in AMS dating because it is relatively acid insoluble and, therefore, can be easily isolated from the hydroxyapatite component and other carbonates.