title: Presence and racemisation of amino acids in calcium oxalate patinas. A case study from the Baptistery in Parma, Italy.
abstract: The organic material present in oxalate patinas, collected from the stone external surfaces of the Baptistery in Parma (Italy), was analysed by GC-MS. The high racemisation levels determined for several specific amino acids indicate that microbial activity could contribute to the formation and modification of the organic material leading to the calcium oxalate patinas.
authors.affiliation: Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica dell'Università, Parco Area delle Scienze, 17A-43100 Parma, Italy. antonella.casoli@unipr.it
authors.forename: Antonella
authors.initials: A
authors.lastname: Casoli
authors.forename: Gerardo
authors.initials: G
authors.lastname: Palla
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D002129:Calcium Oxalate / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007536:Isomerism; D007558:Italy
chemical_list: D000596:Amino Acids; D002129:Calcium Oxalate