» ANTHOCYANIN COMPOSITION OF TANNAT, CABERNET SAUVIGNON AND MERLOT GRAPES AND RED WINES: UTILITY OF THE PROFILES OBTAINED FOR THE VARIETAL CHARACTERISATION
ANTHOCYANIN COMPOSITION OF TANNAT, CABERNET SAUVIGNON AND MERLOT GRAPES AND RED WINES: UTILITY OF THE PROFILES OBTAINED FOR THE VARIETAL CHARACTERISATION
Gonzales-Neves, G.;Barreiro, L.;Gil, G.;Franco, J.;Carbonneau, A.;Moutounet, M
The anthocyanic composition of Tannat, Cabernet Sauvignon and Merlot red grapes and wines was studied in 2002 and 2003. The vineyards were located in the South of Uruguay, consisting of 4 Merlot, 4 Cabernet Sauvignon and 3 Tannat. Grape samples were taken in the harvest, and kept frozen at -20 °C until they were analysed. For this purpose, the skins were separated and macerated in a 12 % ethanol and pH 3.2 solution for 24 hours, with two repetitions per vineyard. The extracts obtained were analysed by HPLC and their anthocyanic composition was determined. Vinifications were carried out with 50 kg of grapes and two repetitions per vineyard. The anthocyanic contents of the wines were analysed two months after the alcoholic fermentation had finished. Grapes and wines of each variety presented contents and anthocyanic profiles statistically different. Tannat skins and wines showed anthocyanic contents significantly higher. Delphinidin, petunidin and non-acylated glucosides proportions were significantly higher in the skins and in Tannat wines. Malvidin and acetate proportions were significantly higher in Cabernet Sauvignon grapes and wines. The consideration of the anthocyanic profiles allowed the discrimination of all the grapes and wines samples of each variety. The relation between the acetyl and coumarylic forms allowed the differentiation of Cabernet Sauvignon grapes and wines from Merlot and Tannat, but not these between themselves. We recommend that you consult the full text of this article, which was published in Bulletin de l'O.I.V. 2005, 78 (887-888) 30-44. Original title: Estudio de la composición antociánica de uvas y vinos tintos de los cv. Tannat, Cabernet Sauvignon y Merlot: utilidad de los perfiles obtenidos para la caracterización varietal
The seasonal character of harvests limits winemaking considerably, especially oenological research. Thus, conserving sterile musts during the whole year to carry out experiments is certainly a very...
Igor, BAROJA-CAREAGA, University of the Basque Country - Elena, GARCÍA DE LA PEÑA, Ardoatek - Dario, CANTU, University of California, Davis - And one, ESTONBA, University of the Basque Country - I...
Alexandra LOWREY, University of Auckland, New Zealand Bruno FEDRIZZI, University of Auckland Rebecca JELLEY, University of Auckland Stuart MORROW, University of Auckland
Parpinello, G.P., Ricci, A., Serantoni, M., Balducci, A., Ragni, L., Versari, A.; University of Bologna, Italy
Proteins occurring in wine originate from several sources during the winemaking process. Protein content in wines ranges from traces up to hundreds of mg/L, and may cause physical instability in wh...
Manuel Meneghetti, DSMN, Università Ca’ Foscari Venezia
The sun, the main natural resource of our planet, has been studied in recent years optimizing materials, technologies and processes to obtain electrical energy thanks to the best renewable and clea...
Cookies are pieces of information that are stored on your device that you can delete or block at any time. The information we collect allows us to improve the service we offer you. No data is disclosed to third parties.
Technical cookies are necessary for the functioning of the site and take into account your browsing preferences, such as language.
Technical cookies
Analytical cookies refer to systems for statistical analysis, in anonymous and aggregate form, relating to the running of the site and user behaviour.
Analytical cookies
Failure to accept the optional cookies will not eliminate the display of any advertisements. You can change your preferences at any time by clicking on the icon in the bottom right-hand corner.