1,720,967 research outputs found
Comparación de 4 tratamientos de sincronización de celos en ovinos
Full text linkEn la unidad de producción ovina de la EEA Esquel del INTA, se está llevando a cabo un modelo de producción intensiva de corderos para carne, lo cual implica desarrollar ensayos de alimentación, reproducción y un trabajo de mejoramiento genético a fin de aumentar la cantidad de corderos producidos al año y la calidad carnicera de los mismos.EEA EsquelFil: Raso, Roberto Miguel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agroforestal Esquel (EEAf Esquel); Argentin
Sanidad ovina
Full text linkEn este artículo trataremos sobre las enfermedades de mayor incidencia en las majadas de nuestra región. Según el agente causal, pueden ser, producidas por parásitos, externos como la sarna y el melófago e internos como el saguaypé, bacterias, como la mancha, gangrena y enterotoxemia y virales como el ectima contagioso. Seguidamente se brinda información sobre las principales enfermedades
que afectan a la ganadería ovina en nuestra región.EEA EsquelFil: Raso, Roberto Miguel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agroforestal Esquel (EEAf Esquel); Argentin
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
TRATTAMENTO ALTERNATIVO DELLA FIBROSI CISTICA: LA TERAPIA EPIGENETICA
No full textLa Fibrosi Cistica (FC) è una malattia autosomica recessiva causata da mutazioni nel gene “Cystic Fibrosis Transmembrane conductance Regulator” (CFTR) che codifica per un canale dello ione cloruro, espresso nelle cellule epiteliali di diversi tessuti. L’alterata funzionalità del CFTR determina, nei polmoni dei pazienti FC, una riduzione della secrezione del cloruro e un iperassorbimento dello ione sodio, per una mancata repressione del canale epiteliale per lo ione sodio (ENaC) (Gentzsch et al., J. Biol. Chem, 2010, 285:32227-32). ENaC è composto da tre subunità, α, ß e γ codificate rispettivamente dai geni SCNN1A, SCNN1B e SCNN1G. Studi precedenti suggeriscono che la metilazione del DNA possa controllare la trascrizione dei geni ENaC. Lo scopo del presente lavoro è quello di ridurre l’espressione dei geni ENaC mediante manipolazioni epigenetiche. Come modello di epitelio FC umano in coltura abbiamo utilizzato le cellule CFBE41o- (F508del / F508del) trattate con agenti ad azione ipermetilante sul DNA, come la SAM (S-adenosil-metionina) e ad azione ipercondensante sulla cromatina, come la curcumina (un inibitore dell’istone acetiltransferasi p300). L’espressione dei geni ENaC è stata valutata quantitativamente mediante real time PCR. Nelle cellule CFBE41o-, i trattamenti con SAM o curcumina riducono significativamente l’espressione dei geni SCNN1A e SCNN1B. Il trattamento combinato con SAM + curcumina determina una riduzione media dell’espressione dei geni SCNN1A e SCNN1B rispettivamente del 29% e 25% (ma fino al 36% e 60% in alcuni esperimenti). Inoltre, questi trattamenti non sembrano influenzare negativamente l’espressione del CFTR. Il gene SCNN1G risulta espresso a livelli troppo bassi perché la sua modulazione possa essere valutata in maniera attendibile. I nostri risultati suggeriscono che l’espressione dei geni SCNN1A e SCNN1B possa essere ridotta con l’utilizzo di trattamenti epigenetici e che approcci sinergici, che agiscono sia sulla metilazione del DNA sia sulla condensazione della cromatina, siano particolarmente efficienti. E’ in corso l’estensione di questi risultati anche a colture primarie di cellule epiteliali polmonari umane isolate da pazienti FC. Questo studio è finanziato dalla Fondazione per la ricerca sulla Fibrosi Cistica (Progetto #3/2012)
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