1,721,189 research outputs found
Mass transfer and phenolic profile of strawberries upon refrigerated osmodehydration
No full textWhole strawberries were osmodehydrated at low temperature (5 degrees C) in a sucrose syrup (500 g/kg of solution) for different processing times (24, 48, 72, 96, and 120 h); after the treatment, water loss, solid gain, and weight reduction were recorded. Next, the osmodehydrated samples were frozen, and after a 5-month storage at - 18 degrees C they were analyzed for drip loss, titratable acidity, refractometric index, pH, and sensory acceptance. The phenolic profile of the samples was characterized by means of high performance liquid chromatography (HPLC). After thawing, osmodehydrated samples presented a high acceptability for consumers. In addition, they presented drip loss values that were inversely correlated with the processing time, with 120-h samples presenting negligible drip loss after thawing. The processing time influenced the final quality of strawberries, and samples treated for 24-48 h were very suitable for direct consumption after thawing, in substitution of fresh strawberries. The samples treated for 72 120 h also presented characteristics that may render them suitable for applications in the food industry
Excerpts from an overview on most common and emerging fraud in the olive oil sector
No full textWithin the H2020 OLEUM project, a review of most common infringements (fraud or non-compliance) was conducted with the support of two questionnaires specifically addressed to all the stakeholders and regulatory bodies in the olive oil sector. This review was undertaken with great urgency after the European Commission’s 2019 annual report on food fraud identified fats and oils as the most notorious category in the system, and olive oil was found to be the most reported produc
Applicazione di tecniche elettrochimiche per lo studio delle proprietà antiossidanti dei composti fenolici dell'olio vergine di oliva
No full textEffect of Bactrocera Oleae infestation on the aromatic profile of virgin olive oils
No full textThe wholeness and healthiness of milled fruits are very important conditions for the final quality of virgin olive oil for example, the action of pests as Bactrocera Oleae during the olives growth is one of the main causes of undesirable metabolic processes that lead to the deterioration of the virgin olive oil quality. in this work, the evaluation of the main indices of virgin olive oil quality (free acidity, peroxide number, sensory analysis) was firstly achieved; secondly, the effect of different degrees of Bactrocera Oleae infestation on qualiquantitative composition in volatile compounds of 32 virgin olive oils was evaluated. the SPME/GC analytical technique, coupled with the use of mass spectrometry detector (GC-MSD) and flame ionization detector (GC-FID) was applied to extract, to identify and to quantify the volatile fraction. statistical elaboration of data evidenced good correlations between percentages of attack and free acidity (R=0.77), peroxide number (R=0.58) and some of the volatile molecules. in particular, the 6-methyl-5-hepten-2-one was the most positively correlated (R=0,78) compound with Bactrocera Oleae attack. the results of NIPALS-PLS elaboration have shown higher similarity between the aromatic profiles of oils produced from damaged olives and those of winey and fusty official defects (supplied by 100C)
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
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