title: Antioxidant White Grape Seed Phenolics: Pressurized Liquid Extracts from Different Varieties.
abstract: Grape seeds represent a high percentage (20% to 26%) of the grape marc obtained as a byproduct from white winemaking and keep a vast proportion of grape polyphenols. In this study, seeds obtained from 11 monovarietal white grape marcs cultivated in Northwestern Spain have been analyzed in order to characterize their polyphenolic content and antioxidant activity. Seeds of native (Albariño, Caiño, Godello, Loureiro, Torrontés, and Treixadura) and non-native (Chardonnay, Gewurtzträminer, Pinot blanc, Pinot gris, and Riesling) grape varieties have been considered. Low weight phenolics have been extracted by means of pressurized liquid extraction (PLE) and further analyzed by LC-MS/MS. The results showed that PLE extracts, whatever the grape variety of origin, contained large amounts of polyphenols and high antioxidant activity. Differences in the varietal polyphenolic profiles were found, so a selective exploitation of seeds might be possible.
authors.affiliation: Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Avda das Ciencias s/n, Campus Vida, E-15782 Santiago de Compostela, Spain. carmen.garcia.jares@usc.es.|Grape Laboratory, Universidade de Santiago de Compostela, Edificio Emprendia, Campus Vida, E-15782 Santiago de Compostela, Spain. carmen.garcia.jares@usc.es.
authors.forename: Carmen
authors.initials: C
authors.lastname: Garcia-Jares
authors.affiliation: Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Avda das Ciencias s/n, Campus Vida, E-15782 Santiago de Compostela, Spain. alberto.vazquez3@rai.usc.es.
authors.forename: Alberto
authors.initials: A
authors.lastname: Vazquez
authors.affiliation: Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Avda das Ciencias s/n, Campus Vida, E-15782 Santiago de Compostela, Spain. juanpablo.lamas@usc.es.
authors.forename: Juan P
authors.initials: JP
authors.lastname: Lamas
authors.affiliation: Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Avda das Ciencias s/n, Campus Vida, E-15782 Santiago de Compostela, Spain. martapajarovarela@gmail.com.
authors.forename: Marta
authors.initials: M
authors.lastname: Pajaro
authors.affiliation: Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Avda das Ciencias s/n, Campus Vida, E-15782 Santiago de Compostela, Spain. marta.alvarez@usc.es.|Grape Laboratory, Universidade de Santiago de Compostela, Edificio Emprendia, Campus Vida, E-15782 Santiago de Compostela, Spain. marta.alvarez@usc.es.
authors.forename: Marta
authors.initials: M
authors.lastname: Alvarez-Casas
authors.affiliation: Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Avda das Ciencias s/n, Campus Vida, E-15782 Santiago de Compostela, Spain. marta.lores@usc.es.|Grape Laboratory, Universidade de Santiago de Compostela, Edificio Emprendia, Campus Vida, E-15782 Santiago de Compostela, Spain. marta.lores@usc.es.
authors.forename: Marta
authors.initials: M
authors.lastname: Lores
keywords: Albariño; GSE; antioxidant activity; grape marc; grape seeds; phenolic profile; winemaking wastes