title: The volatile compounds in lamb fat are affected by the time of grazing.
abstract: This study was designed to assess whether different grazing managements affect the appearance of organic volatile compounds (VOC) in lamb fat. Forty-two lambs were divided into four groups: 9 lambs were restricted in stall and fed concentrate (S group); 12 lambs grazed from 9 am to 5 pm (8h group); 10 lambs grazed from 9 am to 1 pm (4 hAM group) and 11 lambs grazed from 1 pm to 5 pm (4 hPM group). After 72 days on feed the animals were slaughtered and the perirenal fat subjected to SPME-GC/MS analysis of VOC; the data were analyzed by stepwise discriminant analysis. The 6-methyl-2-heptanone and furanone, 2,5-dimethyl, 4-hydroxy-3(2H) allowed discrimination between the 4 hAM and the 4 hPM animals. These are the first results indicating that the time of the day in which the animals are allowed to graze affects the appearance of VOC in lamb fat.
authors: University of Catania, DISPA, Sezione di Scienze delle Produzioni Animali, Via Valdisavoia 5, 95123 Catania, Italy. vvasta@unict.it
authors: Valentina
authors: V
authors: Vasta
authors: Valentina
authors: V
authors: Ventura
authors: Giuseppe
authors: G
authors: Luciano
authors: Valeria
authors: V
authors: Andronico
authors: Renato I
authors: RI
authors: Pagano
authors: Manuel
authors: M
authors: Scerra
authors: Luisa
authors: L
authors: Biondi
authors: Marcella
authors: M
authors: Avondo
authors: Alessandro
authors: A
authors: Priolo
mesh_terms: D000003:Abattoirs; D000447:Aldehydes / Q000032:analysis; D000466:Alkadienes / Q000032:analysis; D000821:Animal Feed; D000818:Animals; D001823:Body Composition; D004032:Diet / Q000662:veterinary*; D005223:Fats / Q000032:analysis*; D008460:Meat / Q000032:analysis*; D015999:Multivariate Analysis; D012756:Sheep; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D000447:Aldehydes; D000466:Alkadienes; D005223:Fats; D055549:Volatile Organic Compounds; C097196:2,6-nonadienal; C502503:2,4-heptadienal