1,720,960 research outputs found
Impact of wooden barrel storage on the volatile composition and sensorial profile of red wine
No full textThis study determined the influence of the kind of wood (Allier vs Limousin and Allier vs chestnut), the age (new vs 1 year old Allier oak barriques) and the volume (1000L vs 225L ) of Allier oak containers on sensorial profile and volatile composition of a red Sangiovese wine during 360 days of ageing. The greatest sensory differences were found between Allier oak wood and chestnut wood barriques. In chestnut barriques, wines were more fruited and tannic than in Allier where wines were less astringent, more vanilla flavoured and well-balanced. Some differences in chemical composition and sensorial profile were observed in wines aged in used containers with different capacities. The use of containers showed that migration phenomena from wood to wine were more intense in new barriques than in used ones. Therefore, wines aged in new barriques were richer in volatile wood compounds than wines aged in old barriques.[...
Characterization of Uva Longanesi red wine by selected parameters related to astringency
Full text linkThis research represents a first attempt to chemically characterize wines produced from the
autochthonous grape variety, Uva Longanesi, based upon the phenolic compounds responsible for its high astringency as confirmed by preliminary sensory analysis. In addition, a wine produced from Sangiovese, the most popular grape variety in the Emilia-Romagna region, was analyzed for comparative purposes. Results showed that Uva Longanesi wine had a higher pH, alcohol concentration, and total dry extract than the Sangiovese wine.With
regards to phenolic constituents, the Uva Longanesi wine had higher color parameters and greater concentrations of total phenolics, including monomeric anthocyanins, small polymeric pigments, and tannins. The phenolic composition of Uva Longanesi wine was found to be responsible for the high reactivity of the wine during fining trials
Comparison of traditional and reductive winemaking: influence on some fixed components and sensorial characteristics
No full textAn explorative study to verify the applicabilityof reductive winemaking (RW) on two cultivars was carriedout. To this purpose, traditional winemaking (TW) andRW were carried out on a semi-aromatic white grape(Sauvignon blanc) and a white neutral one (Trebbianoromagnolo). All phenolic parameters were higher in RWwines, while other substances such as alcohol, reducingsugars, acids, and volatile acidity acids were less affectedby the different winemaking technique. A deeper yellowcolor (OD 420) was a direct consequence of the higherphenolic content of RW wines, while OD 320 was strictlyrelated to caftaric acid integrity. Analyses showed a modificationof the RW wines, also in the case of a neutralcultivar. Principal component analysis (PCA) was appliedto the data set, and the first two PCs explained almost 85%of the total variability and divided TW and RW wines intwo groups to demonstrate that the effect of winemakingoverwhelmed maturation differences. Panelists preferredRW wines, which were characterized by a richer and moredelicate aroma. The study demonstrated that a carefulexclusion of air combined with an effective oxidationprevention yields to more characterized and pleasant wines
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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