title: Effect of toasting on non-volatile and volatile vine-shoots low molecular weight phenolic compounds.
abstract: Low molecular weight phenolic compounds (LMWPC), including non-volatile and volatile, of Airén and Moscatel vine-shoot cultivars waste submitted to different toasting conditions (light, 180°/15min; medium, 180°/30min; high 180°/45min) were studied in order to exploit them with oenological purposes. The LMWPC differences were mainly due to the toasting times rather than vine-shoot variety. In non-volatile LMWPC fraction, flavanols and almost all phenolic acids decreased by toasting. The presence of trans-resveratrol has a special relevance at light toasting: 14 times more concentrated in Airén and 6 times in Moscatel vine-shoots, than their respective non-toasted samples. The volatile LMWPC showed a significant increment with toasting, being vanillin the one with the highest difference respect to non-toasted samples at high conditions: more than 15 times in Airén and 11 in Moscatel. Although toasting reduced some LMWPC, particular characteristics of these vine-shoots must be taken into account when considering its future use.
authors.affiliation: Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Cátedra de Química Agrícola, Avda. de España s/n, 02071 Albacete, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Sánchez-Gómez
authors.affiliation: Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Cátedra de Química Agrícola, Avda. de España s/n, 02071 Albacete, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Zalacain
authors.affiliation: Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Cátedra de Química Agrícola, Avda. de España s/n, 02071 Albacete, Spain.
authors.forename: G L
authors.initials: GL
authors.lastname: Alonso
authors.affiliation: Universidad de Castilla-La Mancha, E.T.S.I. Agrónomos y Montes, Cátedra de Química Agrícola, Avda. de España s/n, 02071 Albacete, Spain. Electronic address: Rosario.Salinas@uclm.es.
authors.forename: M R
authors.initials: MR
authors.lastname: Salinas
mesh_terms: D006358:Hot Temperature; D008970:Molecular Weight; D010636:Phenols / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry; D000077185:Resveratrol; D013267:Stilbenes / Q000737:chemistry; D027843:Vitis / Q000737:chemistry*
chemical_list: D010636:Phenols; D010936:Plant Extracts; D013267:Stilbenes; D000077185:Resveratrol
keywords: Airén; Moscatel; Non-volatile and volatile LMWPC; Toasting; Vine-shoot