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Changes in aromatic characteristics of loureiro and alvarinho wines during matu...

Changes in volatiles during maturation in bottles of monovarietal Vinhos Verdes wines from Loureiro and Alvarinho grape varieties, were followed by chemical and sensory analyses. Young wines and wines matured for 8 and 20 months were studied. The volatiles were determined by gas chromatography– mass spectrometry (GC-MS) after extraction on XAD-2 resin. Straight chain fatty acid ethyl esters and acetates of fuse...

Volatile and glycosidically bound composition of Loureiro and Alvarinho wines

Composition of Loureiro and Alvarinho wines from the Vinhos Verdes region, respecting free volatile compounds as well as glycosidically bound aroma precursors, was exhaustively determined by GC-MS after adsorption on XAD-2 resin. On the whole, were identified and quantified 120 volatile compounds in the free fraction and 77 glycosidically bound compounds, belonging to C6-compounds, alcohols, fatty acids ethyl e...

Characterization and differentiation of five “vinhos verdes” grape varieties on...

The aromatic profiles of three white grape varieties (Alvarinho, Loureiro, and Avesso) and two red varieties (Amaral and Vinhão) from the Vinhos Verdes region have been established with respect to the monoterpenic compounds, present either in free and in glycosidically bound fractions. Seventeen compounds have been identified and quantified in the free form and 21 in the glycosidically bound form. Loureiro vari...

Characterization and differentiation of "vinhos verdes" grape varieties by terp...

Soil and climatic influence on the free and glycosidically bound volatiles of g...

The Vinhos Verdes Region is situated in the northwest of Portugal. The Atlantic Ocean and the relief markedly influence the climate. This region is in Viticultural Zone C I a) of the Winegrowing Regions of the European Communities. The produced wine is unique and its specific characteristics are mainly due to the climate and soil. The white Vinho Verde is softly alcoholic, with a delicate, fresh and fruity bouq...

Caracterização aromática de vinhos das castas Loureiro e Alvarinho: evolução du...

Free and bound aromatic components of Loureiro and Alvarinho grape varieties fr...

Free and glycosidically bound volatiles were quantified in five grape samples grown in 1996 from two of the most important Vitis vinifera varieties of Vinhos Verdes Region, Loureiro and Alvarinho. The most recommended sub-region for monovarietal wine production and an alternative sub-region were chosen. A third sample of Alvarinho was selected from a different and particular pebble soil. Forty compounds in the ...

Teneur en norisoprénoïdes en c13 des cépages Portugais loureiro et alvarinho

Les cépages portugais Loureiro et Alvarinho sont importants pour l'économie de la Région portugaise des "Vinhos Verdes". Ces deux variétés de raisin sont à l'origine de vins blancs monovarietaux réputés, présentant des caractéristiques aromatiques intéressantes. Ce travail a pour objectif d'approfondir les connaissances sur l'une des composantes du potentiel aromatique de ces deux cépages, les norisoprénoïdes e...

Différentiation des cépages portugais Loureiro et Alvarinho basée sur la compos...

Jornadas Universitas Viticultura e Enologia