title: Supercritical extraction from vinification residues: fatty acids, α-tocopherol, and phenolic compounds in the oil seeds from different varieties of grape.
abstract: Supercritical fluid extraction has been widely employed in the extraction of high purity substances. In this study, we used the technology to obtain oil from seeds from a variety of grapes, from vinification residues generated in the Southern region of the state of Rio Grande do Sul, Brazil. This work encompasses three varieties of Vitis vinifera (Moscato Giallo, Merlot, and Cabernet Sauvignon) and two of Vitis labrusca (Bordô e Isabel), harvested in 2005 and 2006. We obtained the highest oil content from Bordô (15.40%) in 2005 and from Merlot (14.66%), 2006. The biggest concentration of palmitic, stearic, and linoleic acids was observed in Bordô, 2005, and in Bordô, Merlot, and Moscato Giallo, 2006. Bordô showed the highest concentration of oleic acid and α-tocopherol in both seasons too. For the equivalent of procyanidins, we did not notice significant difference among the varieties from the 2005 harvest. In 2006, both varieties Isabel and Cabernet Sauvignon showed a value slightly lower than the other varieties. The concentration of total phenolics was higher in Bordô and Cabernet Sauvignon. The presence of these substances is related to several important pharmacological properties and might be an alternative to conventional processes to obtain these bioactives.
authors.affiliation: Laboratório de Óleos Essenciais e Extratos Vegetais, Instituto de Biotecnologia, Universidade de Caxias do Sul, Rua Francisco Getúlio Vargas 1130, Petrópolis, 95070-560 Caxias do Sul, RS, Brazil. sabonim.radan@gmail.com
authors.forename: F
authors.initials: F
authors.lastname: Agostini
authors.forename: R A
authors.initials: RA
authors.lastname: Bertussi
authors.forename: G
authors.initials: G
authors.lastname: Agostini
authors.forename: A C
authors.initials: AC
authors.lastname: Atti Dos Santos
authors.forename: M
authors.initials: M
authors.lastname: Rossato
authors.forename: R
authors.initials: R
authors.lastname: Vanderlinde
mesh_terms: D001938:Brazil; D002851:Chromatography, High Pressure Liquid; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D005227:Fatty Acids / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D008041:Linoleic Acids / Q000032:analysis; D019308:Palmitic Acid / Q000032:analysis; D010636:Phenols / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry; D044945:Proanthocyanidins / Q000032:analysis; D012639:Seeds / Q000737:chemistry*; D013045:Species Specificity; D013229:Stearic Acids / Q000032:analysis; D027843:Vitis / Q000737:chemistry* / Q000145:classification; D014920:Wine; D024502:alpha-Tocopherol / Q000032:analysis*
chemical_list: D005227:Fatty Acids; D008041:Linoleic Acids; D010636:Phenols; D010938:Plant Oils; D044945:Proanthocyanidins; D013229:Stearic Acids; D019308:Palmitic Acid; C031183:stearic acid; D024502:alpha-Tocopherol