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Attività antiossidante di una propoli sarda
No full textÈ stato verificato il potere antiossidante di una propoli sarda nei confronti di un sistema lipidico polinsaturo utilizzando come substrato linoleato di metile; la sua efficacia è stata confrontata con quella dell’alfa-tocoferolo..
Frazione lipidica di uova di pesce. Nota I: semiconserve.
No full textSono state analizzate le frazioni lipidiche di semi-conserve di uova di pesce di uso alimentare. In particolare si sono utilizzati campioni commerciali e artigianali di bottarga di muggine, tonno e molva (prodotti essicati) e campioni commerciali di caviale, uova di lompo, capelan e salmone (in salamoia)....
Valore nutrizionale di carni di allevamento sarde: Agnellino, capretto e “porcetto”.
No full textScopo di questo lavoro è integrare le Tabelle di composizione degli alimenti per alcuni tagli di carni di uso comune in Sardegna. Sono stati analizzati .......Object of this work is to integrate Food Composition Tables about some cuts of meat usually utilized in Sardinia. We have analyzed lean meats and offals of piglet (included the skin), little lamb and kid. We have determinated the following parameters: water content, total lipids and proteins. The percent fatty acid composition was determinated by GLC, the glyceridic structure by TLC, the polyunsaturation/total insaturation ratio by 1H-NMR. The values of saturated / monomisatured / polyunsaturated fatty acids ratio was calculated for nutritional purpose and also the caloric apport; when it was possible, our values have been compared with bibliographical data, they are resulting usually lower. For offals were not available values of comparison
Studio di alcuni parametri nutrizionali di salumi di provenienza sarda e corsa.
No full textSono stati esaminati campioni sia commerciali che artigianali di salumi sardi e corsi, sia insaccati (salami, salsicce, testa in cassetta, figatellu) che non insaccati (prosciutto crudo, coppa e guanciale), misurando i seguenti parametri utili alla determinazione del valore nutrizionale: umidità, lipidi totali (Blight e Dyers), composizione acidica % (GLC-MS ...Commercial and handmade, sardinian and corsican, either meet packed in sacks (salami, sausages, testa in cassetta, figatellu) or not packed (raw ham, pork cheek, pork brawn) samples have been analyzed by measurement of the following parameters, useful to determine the nutritiousness: humidity, total lipids (Blight and Dyers), % acidic-composition (GLC-MS of the methyl esters) and the ratio between several typologies of unsaturation (GLC and 1H-NMR), glyceric forms (TLC), NaCl (Volhard), nitrates and nitrites (Gavioli and Coll.). These pork products have not been always shown very good organolectic pmvperties, especially as concern hams, usually too much fresh or too much dried, somnetimes very stringy, too salty, with nitrates value above the norm.The variability of obtained data for nitrates and nitrites is greater in the meat packed. The %acidic composition is similar in analogous sardinian and corsican products, for other paramneters with coincident average, correspond standard deviation lower in corsican products
La risonanza magnetica nucleare nella determinazione del degrado ossidativo delle sostanze grasse: nota III. Valutazione delle alterazioni di lipidi animali in seguito a cottura.
No full textNel presente lavoro si è verificata la possibilità di utilizzare la spettroscopia H NMR per valutare la tipologia e l’entità delle variazioni subite dalle frazioni lipidiche di carni in seguito a diversi procedimenti di cottura ...
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
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
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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