Conférences
le (33m36s)
Résultats de recherche
Trier par :
Nombre de programmes trouvés : 1667
Conférences
le (45m51s)
Prof Régis Gougeon - Messages in a bottle: from oenolomics to the structural resolution of the transient chemistry of wine aging
Metabolomics applied to vine and wine sciences, has significantly developed over the last ten years. To that respect, high-resolution mass spectrometry has clearly shown unprecedented capability based on ultra-high resolving power and mass measurement accuracy. The introduction of the concept of oenolomics, exemplified by the metabologeography expression of cooperage oak wood in bottle-aged wines, further paved the way for breakthrough investigations of specific chemical fingerprints of wines, considered as transient molecular memories of vineyard-related environmental parameters and/or enological practices, which may have driven their original composition. We thus reported a ... Voir la vidéo
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 ... Voir la vidéo
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 ... Voir la vidéo
Conférences
le (47m15s)
Dr Magdalena Malinowska - Grape cane extracts a natural ingredients with cosmetic activities
...Modern and effective skin care formulations based on a natural ingredients has become the key issue in cosmetic industry. It is well known, that grapes are a rich source of many valuable compounds like E-resveratrol, which exhibits several... Voir la vidéo
Conférences
le (41m6s)
Dr Elżbieta Sikora - Supercritical CO2 plant extracts as raw materials in modern cosmetic formulations
New products containing active substances from the plants are systematically appearing on the cosmetics market. Among others natural products, based on raw materials that meet the standards set for natural and organic cosmetics (COSMOS), are becoming more and more popular.The extracts obtained under supercritical CO2 conditions (SC-CO2) are an interesting alternative to plant extracts obtained by traditional methods. The parameters of the SC-CO2 process allow to obtain extracts of very high purity, free from contamination with conventional solvents. Additionally, relatively low temperatures and anaerobic atmosphere during the process, avoid oxidation and thermal decomposition of the bioactive components contained in ... Voir la vidéo
Conférences
le (1h36m35s)
L’épistolaire à l’ère du numérique
... objectifs culturels et patrimoniaux. Ce webinaire est soutenu par le projet Scénarios de recherche et gestion des risques dans l’exploitation des sources numériques (EUR Translitterae, www.translitterae.psl.eu/risques-exploitation-sources-numeriques),... Voir la vidéo
Conférences
le (26m37s)
L’épistolaire à l’ère du numérique - Discussion
... objectifs culturels et patrimoniaux. Ce webinaire est soutenu par le projet Scénarios de recherche et gestion des risques dans l’exploitation des sources numériques (EUR Translitterae, www.translitterae.psl.eu/risques-exploitation-sources-numeriques),... Voir la vidéo
Vidéocours
le (14m34s)
1.4 - Organisation des systèmes de villes
...Les sources de la diversité urbaine sont très nombreuses, la principale étant la localisation, qui interfère avec les densités de population. Cette séquence analyse quelques-uns des facteurs qui font varier l'organisation des villes. ... Voir la vidéo
Vidéocours
le (16m52s)
