1,720,955 research outputs found
Valorizzazione della vinificazione in aziende orientate alla vitivinicoltura biodinamica
No full textIl concetto di vino “naturale” potrebbe apparire un richiamo evocativo al vino del passato. Durante i secoli, la tecnologia ha permesso agli enologi di produrre vini con il pieno controllo della vinificazione, coadiuvato dall’aggiunta di componenti esogene, additivi e microrganismi. I moderni “vini naturali”, pur riferendosi a un concetto di semplicità, rendono evidente l’importanza della conoscenza profonda del processo di vinificazione e dei suoi artefici, per ottenere prodotti di qualità in assenza di operazioni invasive e aggiunte estranee alla materia prima offerta dal vigneto. L’impiego della fermentazione spontanea è alla base della produzione di vini con uno spiccato legame con il territorio, grazie all’intervento del microbiota complessivo del vigneto, delle uve e dell’ambiente di cantina. Nelle prime fasi della vinificazione diverse specie e ceppi competono nello stesso mosto per lasciare in seguito spazio ai lieviti del genere Saccharomyces i quali, generalmente, prendono il sopravvento portando a compimento il processo. Anche nell’ambito della specie Saccharomyces cerevisiae si susseguono diversi ceppi nel tempo e nelle vendemmie. Lo scopo del presente lavoro è stato lo studio della diversità di lieviti S. cerevisiae isolati in aziende biodinamiche in Toscana in diverse vendemmie dal 2009 al 2013. Nel 2009 furono identificati circa duecento isolati provenienti da due aziende biodinamiche, tra i quali si distinsero per le loro caratteristiche tredici ceppi di S. cerevisiae. Alcuni dei biotipi identificati nel 2009 e 2010 sono stati ritrovati nel 2013, dimostrando una certa stabilità nel microbiota aziendale, non in completo accordo con altri studi. Alcuni dei ceppi identificati sono stati utilizzati a confronto con fermentazioni spontanee aziendali per valutarne gli effetti sulle caratteristiche sensoriali del vino prodotto e considerarne l’eventuale impiego in soccorso a fermentazioni problematiche
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
Oenological characterisation of indigenous strains of S. cerevisiae isolated in a biodynamic winery in the Cortona DOC area
Full text linkGenotypic and technological characterisation of the S. cerevisiae population isolated in a biodynamic winery in the Cortona DOC area was performed to gain better knowledge of the variables that influence winemaking. The oenological performance of 11 S. cerevisiae strains was evaluated with physiological tests; strain typing was performed through analysis of interdelta sequences and 26S rDNA sequencing. The analysis revealed a remarkable variability in terms of S. cerevisiae strains, despite the homogeneity of wine features, underlining the high levels of biodiversity characterising biodynamic agriculture. Some strains were found in wines of different vintages, suggesting the presence of an established microbiota in the winery. Oenological tests demonstrated that while some yeasts provided reliable oenological performance, other strains were not able to accomplish prompt and effective alcoholic fermentation, or were characterised by spoilage characteristics, such as excessive production of volatile phenols or acetic acid. Indigenous strains of S. cerevisiae could be a useful instrument for reliable winemaking without altering the native microbiota of each oenological environment. However, characterisation of their oenological suitability, and the application of practices able to drive the evolution of microbiota, must be employed to reduce the risk of wine spoilage
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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