1,721,196 research outputs found
Acido folico che cosa è, a che cosa serve
No full textL’acido folico (vitamina B9, acido pteroilglutammico) è una vitamina idrosolubile del gruppo B. È un prodotto sintetico che non si trova in natura ed è il principale
composto utilizzato nei prodotti multivitaminici e nella fortificazione di farine e cereali. I folati sono i composti dell’acido pteroilglutammico presenti
in natura e, poiché non sintetizzabili nell’uomo, sono alimenti essenziali. Verdure a foglia larga, frutta e cereali fortificati sono le principali fonti alimentari di
folati. I folati sono necessari per la moltiplicazione cellulare, particolarmente in periodi di rapida crescita quali la gravidanza e la prima infanzia. Decenni di
studi hanno ormai dimostrato che un’assunzione adeguata di acido folico nel periodo periconcezionale riduce il rischio di alcune malformazioni congenite,
in particolare di difetti del tubo neurale. Questi risultati hanno indotto azioni di salute pubblica che hanno portato alla formulazione di raccomandazioni per
assicurare un adeguato apporto di acido folico nelle prime settimane di gravidanza. Pertanto, alle donne che programmano la gravidanza o che non ne
escludono attivamente la possibilità, si consiglia l’assunzione di cibi fortificati o la supplementazione con acido folico oltre ad una dieta ricca di folati per
ridurre il rischio di malformazioni congenite. La Recommended Dietary Allowance (RDA) per donne in gravidanza è di 600-800 microgrammi, circa il doppio
della normale RDA di 400 microgrammi consigliati al di fuori della gravidanza.
Le implicazioni della supplementazione/fortificazione con acido folico per altre patologie quali le patologie vascolari, i tumori, la fertilità sono ugualmente
discusse
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
Distribution and age of onset of psychopathological risk in a cohort of children with Down syndrome in developmental age.
No full textBackground: Aim of the study is to intercept specific characteristics and psychiatric comorbidity in Down Syndrome (DS). The study describes the distribution and the age of specific aspects of behavioral phenotype in a sample of subjects with DS.
Methods: Psychopathological risk has been evaluated in a 97 DS patient cohort, aged 1 to 18 years, during regular follow-up neuropsychiatric visit and through administration of Child Behavior Checklist (CBCL); Childhood Autism Rating Scale (CARS-T) was assessed to verify the presence of autistic behaviors.
Results: The results show the presence of specific psychopathological risk factors in 90% of the sample. 7% of sample presents autistic features. The risk of psychopathology is independent of the degree of intellectual disability.
Conclusion: The high frequency of psychopathological risk factors indicates the need for accurate monitoring to intercept specific characteristics, such as in the case of comorbidity for autism. The search for specific psychopathological factors is a little explored aspect to date, as evidenced by the literature. Despite the studies available to date highlight the presence of psychopathological vulnerability in DS, so far there are only few reports that explore this issue systematically.
Keywords: Attention deficit/hyperactive disorder; Autism Spectrum disorder; Down syndrome; Oppositional defiant disorder;psychopathological risk
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