1,721,359 research outputs found
Tanins du vin : des interactions avec les protéines de la salive à la sensation d'astringence : Article scientifique rédigé par Francis Canon (chargé de recherche à l'INRA de Dijon) et Véronique Cheynier (directrice de recherche à l'INRA de Montpellier) pour Vitisphere, 1er portail d'information, de mise en relation et de e-services de la filière vigne et vin, paru le 10 septembre 2013
No full textLes tanins participent à la structure des vins rouges en bouche et notamment à la sensation d’astringence. Malgré son importance dans la dégustation des vins rouges, le mécanisme responsable de la perception de l’astringence reste encore mal connu. C’est pourquoi les chercheurs de l’INRA de l’unité mixte de recherches sciences pour l’œnologie (SPO) à Montpellier ont initié des recherches pour mieux comprendre les processus physico-chimiques et biologiques à l’origine de cette sensation. Ces recherches ont également impliqué des chercheurs travaillant au sein du centre des sciences du goût et de l’alimentation (CSGA) à Dijon, du synchrotron SOLEIL sur le plateau de Saclay en région Parisienne, ainsi que plusieurs équipes du CNRS (IBBMC, Orsay ; PMMH, Paris ; IGBMC, Illkirch ; LASIM, Lyon).
Au cours de leurs travaux, ces chercheurs se sont plus particulièrement intéressés aux interactions s’établissant entre les tanins et une famille particulière de protéines salivaires : les protéines riches en proline (PRP). Il apparaît que chez les mammifères la présence de ces protéines dans la salive dépend de la richesse en tanins des aliments qu’ils consomment. De plus, des études précédentes ont montré que les PRP ont une affinité pour les tanins supérieure aux autres protéines. Le rôle de ces protéines salivaires serait de lier et de piéger les tanins, afin de protéger l’organisme contre leurs effets anti nutritionnels. En effet, les tanins sont capables d’interagir avec les enzymes digestives et de les inhiber
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
High resolution mass spectrometry approaches to characterize wine polyphenols
No full textHigh resolution mass spectrometry approaches to characterize wine polyphenols. 254. National Meeting and Exposition of the American-Chemical-Society (ACS) on Chemistry's Impact on the Global Econom
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Wine tannins and pigments. An overview of 30 years of research
No full textWine tannins and pigments. An overview of 30 years of research. 69. ASEV National Conferenc
Wine tannins and pigments. An overview of 30 years of research
No full textWine tannins and pigments. An overview of 30 years of research. 69. ASEV National Conferenc
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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