1,721,007 research outputs found
Quality changes during storage of fresh-cut or intact Swiss chard leafy vegetables
No full textFresh-cut leafy vegetables have been gaining importance in the human diet both their nutraceutical proprieties and low calories content. The preparation procedures for fresh-cut production and the storage system may lead to severe leaf damages that may affect leaf colour and may induce shortened shelf life. The aim of this work was to study the leaf pigment changes in cut and whole Swiss chard leaves under dark or light storage conditions. The effect of treatments was evaluated by chlorophyll, carotenoids and anthocyanins determinations. The leaf membrane integrity was estimated by electrolytes leakages. All measurements were performed until 12 days of storage. The chlorophyll reduction was statistical significant in cut Swiss chard leaves stored in darkness. Total carotenoids did not statistically decline. Anthocyanins content strongly declined in cut leaves in both dark and light storage conditions. Leaf electrolytes leakage increased after 8 days of storage and higher leakage was observed in Swiss chard stored in light conditions without any difference between cut or whole leaves. Results suggest that Swiss chard can be stored until 8 days without any visible changes. Dark storage seemed to preserve quality losses and reduce membrane permeability
Scenario di riferimento
No full textIl capitolo riguarda lo scenario di riferimento dell'orticoltura, con un'ampia descrizione riguardante la diffusione delle colture orticole in Italia e nel mondo. Vengono poi descritte le forme di orticoltura facendo riferimento all' orticoltura professionale e amatoriale, all'orticoltura per l’industria conserviera e per il mercato fresco, all'orticoltura sostenibile, integrata e biologica, all'orticoltura urbana e all'orticoltura sociale e terapeutica. Nel capitolo vengono anche trattati gli aspetti legati alla qualità dei prodotti orticoli
Solanacee
No full textLa famiglia delle solanacee è certamente tra le più importanti a livello mondiale non solo per l’elevatissimo numero di specie in essa comprese, ma soprattutto perché sono molte quelle utilizzate a fini utilitaristici da parte dell’uomo e assai diversi sono i prodotti ottenuti. Vi fanno parte infatti piante largamente impiegate per l’alimentazione umana (ortive diverse), piante coltivate per l’ottenimento di prodotti destinati alla trasformazione (ad esempio tabacco), piante utilizzate dall’industria farmaceutica (ad esempio, stramonio, belladonna), piante impiegate a scopi ornamentali (dei generi Cestrum, Petunia, Solandra, Solanum, ecc.).
Le specie utilizzate a fini alimentari e di interesse orticolo sono a livello mondiale una quarantina e l’organo impiegato può essere costituito dal fusto metamorfosato (per esempio patata), dalle foglie (per esempio morella comune), dai frutti (per esempio
pomodoro).
Nel capitolo vengono descritte le caratteristiche biologiche e le tecniche di coltivazione di quelle specie che assumono maggiore importanza economica: patata, pomodoro, peperone, melanzana
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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