title: Use of instrumental acoustic parameters of winegrape seeds as possible predictors of extractable phenolic compounds.
abstract: The use of instrumental acoustic parameters produced during a compression test as reliable predictors of the extractable phenolic composition in intact winegrape seeds, determined by reference chemical methods, was evaluated by means of the analytical performance of calibration models. These models were developed only for those phenolic compounds most significantly and strongly correlated with the acoustic parameters. The analytical performance of the models was expressed in terms of standard error of cross-validation (SECV) and residual predictive interquartile amplitude (RPIQ), among other statistics. Several acoustic parameters showed satisfactory predictive accuracy for the percentage of galloylation in the terminal units, the content of (-)-epicatechin, and the mean degree of polymerization. Most of the reliable models developed are fairly recommended not for quantitative purposes but for fast screening (SECV% < 19, 1.6 < RPIQ < 2.1).
authors.affiliation: DISAFA-Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università di Torino , Via Leonardo da Vinci 44, 10095 Grugliasco, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Rolle
authors.forename: Simone
authors.initials: S
authors.lastname: Giacosa
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Torchio
authors.forename: Daniele
authors.initials: D
authors.lastname: Perenzoni
authors.forename: Susana
authors.initials: S
authors.lastname: Río Segade
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Gerbi
authors.forename: Fulvio
authors.initials: F
authors.lastname: Mattivi
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D058105:Polymerization; D012639:Seeds / Q000737:chemistry; D027843:Vitis / Q000737:chemistry*
chemical_list: D010636:Phenols; D010936:Plant Extracts