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Amino acid racemization of fossil bone
Dead Sea Scroll parchments: unfolding of the collagen molecules and racemization of aspartic acid
Using X-ray diffraction and racemization analyses, it is found that a major degradative change is due to the unfolding of the collagen molecules to form gelatin and that the degradation generally occurred many centuries ago.
Organogenic elements and compounds in type C and D lunar samples from Apollo 11
Lunar carbonaceous, organic and organogenic materials analysis by mass spectroscopy, gas chromatography and various other methods
Separation of D and L amino acids by liquid chromatography: use of chiral eluants.
An aqueous eluant containing a chiral copper-proline complex effects the separation of underivatized amino acid enantiomers on an ion-exchange column and is monitored for fluorescence after reaction with o-phthalaldehyde, a reagent insensitive to proline but highly sensitive for amino acids containing a primary amino group.