title: Chemical Composition of the Same Brazilian Propolis Sample Analyzed in 1997 and in 2012: No Freezing Effect.
abstract: The same propolis sample that was analyzed by GC-MS in 1997 and 2012 was examined again after being frozen for 15 years. No qualitative changes were seen in its composition; artepilin C, prenyl-p-coumaric acid, dihydrocinnamic acid, caffeic acid were the major compounds.
authors.forename: Bruno José
authors.initials: BJ
authors.lastname: Conti
authors.forename: Vassya
authors.initials: V
authors.lastname: Bankova
authors.forename: José Maurício
authors.initials: JM
authors.lastname: Sforcin
mesh_terms: D015925:Cryopreservation; D005615:Freezing; D011429:Propolis / Q000737:chemistry* / Q000592:standards
chemical_list: D011429:Propolis