118,181 research outputs found
L' Allegro et Il Penseroso, poèmes pour artistes
No full textMartinet Marie-Madeleine. L' Allegro et Il Penseroso, poèmes pour artistes. In: L'enthousiasme dans le monde anglo-américain aux XVIIe et XVIIIe siècles. Actes du Colloque - Société d'études anglo-américaines des 17e et 18e siècles, 1989. pp. 200-204
L' Allegro et Il Penseroso, poèmes pour artistes
No full textMartinet Marie-Madeleine. L' Allegro et Il Penseroso, poèmes pour artistes. In: L'enthousiasme dans le monde anglo-américain aux XVIIe et XVIIIe siècles. Actes du Colloque - Société d'études anglo-américaines des 17e et 18e siècles, 1989. pp. 200-204
The evolution of phenolic compounds in vitis vinifera l. Red berries during ripening: Analysis and role on wine sensory—a review
No full textThe study of phenolic maturity in Vitis vinifera L. requires a multidisciplinary approach to understand how the evolution of berry flavonoids and cell wall material influence the colour and the textures of red wine. This is a challenging issue which involves researchers of viticulture and enology, and the results of their work are of particular interest for the producers of high-quality red wines. This review reports the current knowledge regarding phenolic maturity, describing the sensorial traits of the different compounds, the evolution of berry flavonoids and the methodologies used to evaluate their characteristics. Finally, the role of cell wall material in influencing the extractability of anthocyanins and proanthocyanidins was shown. By means of a critical review of the results, it can be hypothesised that prolonged ripening improved colour characteristics and mouthfeel properties, thanks to the higher amounts of extractable skin flavonoids associated with lower amounts of seed proanthocyanidins, and to the increased affinity of the cell wall material for the proanthocyanidins most involved in the perception of unpleasant astringency
Zeolite application and irrigation during ripening reduced berry sunburn damage and yield loss in cv. Sangiovese (Vitis vinifera L.)
No full textClimate change poses significant challenges to the grapevine cultivation for wine production. In the last years, the occurrence of extreme weather events such as intense heat waves and prolonged period of drought increased sunburn damage with negative consequences to yield and berry composition. Short-term adaptation strategies are urgently needed to mitigate these effects. In this light, our study aimed to evaluate the efficacy of zeolite application on the canopy and irrigation during ripening on sunburn damage, yield, and berry composition in cv. Sangiovese (Vitis vinifera L.). Over 3 years (2021-2023), canopy management and irrigation treatments were arranged in a strip-plot design. Canopy management treatments included leaf removal on the cluster zone, with and without zeolite application, and no defoliated control; irrigation treatments comprised irrigation from berry softening and no irrigation. Both zeolite application and irrigation reduced sunburn damage, thus mitigating yield loss. Regarding berry composition, zeolite application did not alter the main parameters whereas irrigation led to reductions in sugar and anthocyanin concentrations. These findings suggest that zeolite application and irrigation during ripening represent promising and cost-effective solutions for grape growers facing climate change-induced challenges. However, further studies are necessary to optimize timing of irrigation to avoid detrimental effects on anthocyanin accumulation
Towards a holistic human perception system for close human-robot collaboration
No full textWhen considering close human-robot collaboration, perception plays a central role in order to guarantee a safe and intuitive interaction. In this work, we present an AI-based perception system composed of different modules to understand human activities at multiple levels, namely: human pose estimation, body parts segmentation and human action recognition. Pose estimation and body parts segmentation allow to estimate important information about the worker position within the workcell and the volume occupied, while human action and intention recognition provides information on what the human is doing and how he/she is performing a certain action. The proposed system is demonstrated in a mockup scenario targeting the collaborative assembly of a wooden leg table, highlighting the potential of action recognition and body parts segmentation to enable a safe and natural close human-robot collaboration
Towards a holistic human perception system for close human-robot collaboration
No full textWhen considering close human-robot collaboration, perception plays a central role in order to guarantee a safe and intuitive interaction. In this work, we present an AI-based perception system composed of different modules to understand human activities at multiple levels, namely: human pose estimation, body parts segmentation and human action recognition. Pose estimation and body parts segmentation allow to estimate important information about the worker position within the workcell and the volume occupied, while human action and intention recognition provides information on what the human is doing and how he/she is performing a certain action. The proposed system is demonstrated in a mockup scenario targeting the collaborative assembly of a wooden leg table, highlighting the potential of action recognition and body parts segmentation to enable a safe and natural close human-robot collaboration
Application of kaolin and italian natural chabasite-rich zeolitite to mitigate the effect of global warming in vitis vinifera l. Cv. sangiovese
No full textHigh temperatures and the anomalous distribution of rainfall during the growing season may have a negative impact on grapevine yield and berry composition. In recent years, many studies have focused on the application of agronomical techniques to reduce the negative impact of heat waves on secondary metabolites such as phenols. In particular, treatments with kaolin have shown positive effects on reducing canopy temperatures, enhancing the accumulation of anthocyanins. In regard to the above, three treatments were evaluated: untreated control (C), kaolin (CAO), and chabasite-rich zeolitites (ZEO) applications on cv. Sangiovese in order to verify the cooling effects on leaves and bunches, and the impact on gas exchange, yield parameters, berry composition, and on both chemical and sensory notes of wine. Minerals were sprayed twice around the veraison on the entire canopy at a 3% concentration. The results showed that the application of the minerals was able to reduce the berry temperatures in both years of the trial as compared to the untreated control (C), without affecting vine gas exchange, yield, and soluble solid accumulation. Furthermore, the cooling effect determined an increase in anthocyanin on both the grapes and the wine. At testing, CAO and ZEO wines stood out regarding greater color intensity and were preferred by the judges
Influence of berry ripeness on accumulation, composition and extractability of skin and seed flavonoids in cv. Sangiovese (Vitis vinifera L.)
No full textBACKGROUND: The anthocyanin and tannin concentration and composition of Vitis vinifera L. cv. Sangiovese berries were investigated from post-veraison to harvest. Exhaustive extraction with methanol and acetone was performed to determine the total flavonoid concentration, while a model hydroalcoholic solution was used to prepare extracts representing the winemaking process. The aim of this study was to improve the knowledge of the phenolic maturity of Sangiovese grape. RESULTS: The total anthocyanin concentration increased during ripening, but the quantity of extractable anthocyanins increased more rapidly than the total. The total skin tannin concentration declined from post-veraison to harvest, whereas the extractable portion increased, with little difference in the composition of the fractions. Both the total and extractable seed tannin concentration diminished rapidly just after veraison, and only small fluctuations were detected until harvest. CONCLUSION: These results indicate that the extractability of anthocyanins and skin tannins increases during ripening, whereas there is no clear trend for seed tannins during the same period. This is the first survey to study the behavior of phenolic compounds during different steps of ripening of Sangiovese grape
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