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Nombre de programmes trouvés : 56
Conférences

le (40m20s)

Dr Viviana Martins - Potential of vineyard calcium sprays to improve grape berry and wine quality

Calcium (Ca) supplements have increasingly been used for improving fruit resistance to abiotic stress and shelf life, but little was known about the effects of Ca on grape berry quality. Following the demonstration that Ca sprays increased grape berry firmness and cell wall pectin content [1], we hypothesized that exogenous Ca also influenced grape berry polyphenolic composition, given the central role of Ca as secondary messenger. Targeted UPLC-MS analysis was performed in fruits collected from vines cv. “Vinhão” sprayed with 2% (w/v) CaCl2 throughout the fruiting season, in two consecutive vintages. Results ...
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Conférences

le (35m58s)

Dr Paweł Siudem - Aronia melanocarpa Fruits as a Dietary Source of bioactive compounds: 1H‑NMR, HPLC-DAD, and Chemometric Studies

Aronia melanocarpa (Michx.) Elliott's (chokeberry) it is well known for the presence of anthocyanins. The fruits also  contain significant amounts of other bioactive compounds, such as chlorogenic acid and its isomer neochlorogenic acid. They exhibit antioxidant, anti-inflammatory, antidiabetic, and antibacterial activities; thus, they can have a significant impact on the health-promoting properties of chokeberry. In our research, we have determined the changes in the content of chlorogenic acids (CGA) and anthocyanins during the development and ripening of fruits. Aronia fruit samples from two organic farms in Poland, were collected every two weeks ...
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Conférences

le (2h20m13s)

Le Millésime 2017 des vins de Bordeaux

Axel Marchal et Laurence Geny, de l'Institut des Sciences de la Vigne et du Vin de l'Université de Bordeaux, présentent le Millésime 2017 et proposent, avec Valérie Lavigne et Christophe Ollivier, une dégustation d'une sélection de vins de Bordeaux : St Estèphe, Margaux, St Emilion, Pomerol, Sauternes... 2017 : un millésime difficile, lié aux aléas climatiques et notamment aux épisodes de gel fin avril qui ont engendrés une grande hétérogénéité au sein des parcelles. Si la qualité des rouges est contrastée, celle des blancs liquoreux reste bonne et celle des blancs secs remarquable. Conférence bilingue ...
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