Characterization of glycosylated aroma compounds in tannat grapes and feasibility of the near infrared spectroscopy application for their prediction

The objective measure of grape quality is an important requirement to enhance wine quality. Particularly, the quantitation of glycosylated aroma compounds could be a useful index for winemakers. In the present work, we evaluated the bound compounds profile on Tannat grapes, and the potential of near infrared (NIR) spectroscopy coupled to chemometric techniques to determine the concentration of the different glycosylated aroma compounds present in this grape variety. The results showed phenols and norisoprenoids as the quantitative most important group of compounds, representing almost 80 % of the total glycosidic components present in Tannat grapes. The glycosidic form of ethyl-β-(4-hydroxy-3-methoxy-phenyl)-propionate was identified for the first time in grapes. The results suggested NIR technique as a screening tool for a fast analysis of the grape aroma potential. The application of such methodology would be ideal for fast grape screening purposes, contributing to the winemaking decisions, classification of the fruit, and perhaps maturity monitoring.Eduardo Boido, Laura Fariña, Francisco Carrau, Eduardo Dellacassa, Daniel Cozzolin

Managerial applicability of graphical formats to support positioning decisions

Issues of segmentation and positioning have always been at the heart of marketing management. In recent years, much methodological progress has been made in order to carry out these two tasks simultaneously, that is, to combine certain types of clustering algorithms with appropriate multidimensional scaling or unfolding procedures. When trying to provide managers with a tool to support marketing decision-making in segmentation and positioning, the ease of use and the visual quality of results must be emphasized. This paper provides a state-of-the-art review of alternative graphical formats designed to assist strategic management. It focuses on three aspects, namely, (I) representing competitive market structures, (II) illustrating preferences for product attributes, and (III) describing customer heterogeneity at the individual as well as segment-specific levels; this paper also explores the interrelations among these aspects. The benefits and limitations of different approaches are discussed, and graphical examples are provided. Advances in academic research are contrasted with the information requirements of marketing managers. Finally, recommendations on the applicability of these alternatives for practical use are offered, and issues for further research are specified