1,720,960 research outputs found
Lezione a posteriori
No full textIl contributo riflette sul significato didattico del CLIL nella scola primaria mettendo in evidenza alcuni aspetti che il metodo EAS - come nel volume viene spiegato - contribuisce a enfatizzare: l'approccio produttivo alla didattica, la dimensione di pubblicazione, lo sviluppo professionale dell'insegnante
Technological Insights into Apple Purée: Assessing Colour Variation Across Production, Cooling Techniques and Shelf-Life
No full textEnzymatic browning is a chemical process resulting in the conversion of phenolic compounds into dark-coloured polymers. In apple-based products, this reaction affects shelf life and organoleptic properties, thereby elevating the potential for product non-conformity. To block enzymatic activity, heat is typically employed. The present work aims to evaluate the variation in the colour of apple purée in relation to different stages of the production process. Three case studies have been analysed, assessing colour variation: I) during the production process, sampling in-line at 8 distinct stages; II) due to different cooling methods: no cooling, standard cooling system with room-temperature water, and instant cooling system with cold water; III) during 16-months conservation. Colour analysis was performed based on CIELAB methodology. In the second case study, focused on the cooling system, temperature and global heat transfer coefficient were also measured. First, results showed that the largest increase in browning occurs in the apple grinding step. Second, the instant cooling system is more efficient than no cooling and the standard cooling system in hindering the browning process. The analysis of the colour parameters demonstrated a visually significant difference among the apple purées subjected to the three cooling treatments. Finally, results highlighted that browning increases exponentially in the first months after packaging and then stabilises. The study supported the adoption of physical preventative methods in apple processing to reduce enzymatic browning of apple purée, favouring product safety and quality. It provides significant insights for enhancing apple purée productive plants and implementing suitable process control systems
Controllo dell'ossidazione lipidica con estratto di origano (Origanum vulgate) in snack surgelati ripieni di pasta d'acciughe [Control of lipid oxidation by means of oregano (Origanum vulgare) extract in frozen appetizers filled with anchovy paste]
No full textThe oxidation of lipids in fish-based foods can lead
to the formation of rancidification and loss of quality
during storage at ambient temperature of, 4°C or at
-18°C. In order to slow down or to inhibit lipid oxidation,
natural antioxidants may be added as ingredient to
foods. In this paper, the results of lab trials aimed at
controlling the lipid oxidation in anchovy paste used as
a filler in frozen appetizers are reported. Samples were
added with a natural oregano (Origanum vulgare)
extract in order to evaluate its effectiveness against
lipid oxidation during 12 weeks storage at -18°C.
The peroxide value (PV), thiobarbituric acid (TBARS),
p-anisidine value (AV) and tot-ox were measured and a
panel test was carried out on the samples at 12 weeks
storage.
Results showed that the addition of the natural
antioxidant to the anchovy paste and also the
application of vacuum packaging reduced lipid’
oxidation and those samples added with added natural
oxidant were the most appreciated by the assessors
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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