Aspartic acid racemization dating sim
Complicating things somewhat is the fact that some amino acids have two asymmetric carbon atoms and can exist in four different forms, known as diastereoisomers.
This includes racemization rate variation among species and organs, and is affected by the depth of decomposition, porosity, and catalytic effects of local metals and minerals. On the assumption that genus does not affect collagen racemization rates, we also studied Neanderthal material and material from carnivores cave bear and several other mammals.
The differentiation of cooked from uncooked bone, shell, and residue is sometimes possible. Racemization is complete when equal amounts of the L- and D-forms are obtained. Additional uncertainties are introduced slepoi online dating the possible contamination of the fossil with free amino acids from the environment, and the possibility of racemization during the acid hydrolysis of the protein in the fossil.