1,721,006 research outputs found
Efecto de la subnutrición materna sobre la gestación temprana en ovinos: énfasis endócrino-metabólico
Full text linkSubnutrición, mortalidad embrionaria y función uterina en ovinos
Full text linkEncuadernado con: Failure to establish and maintain a pregnancy in undernourished recipient ewes is associated with a poor endocrine milieu in the early luteal phase / Victoria de Brun ... [et al.]. Anim. reprod. sci. 173:80-86, 2016. -- The embryo affects day 14 uterine transcriptome depending on nutritional status in sheep. A. Metabolic adaptation to pregnancy in nourished and undernourished ewes / Victoria de Brun ... [et al.]. -- The embryo affects day 14 uterine transcriptome depending on nutritional status in sheep. B. Immune system and uterine remodeling / Victoria de Brun ... [et al.]. -- Undernutrition and laterality of the corpus luteum affects gene expression in oviduct and uterus of pregnant ewes / V. de Brun ... [et al.]. Spanish J. Agricultural Res. 11(4): 989-996, 2013. -- Periconceptional undernutrition modifies endocrine profiles and hepatic gene expression in sheep / V. de Brun ... [et al.]. J. anim. physiol. anim. nutrition DOI 10.1111/JPN. 12261. -- Hepatic expression of insulin-like growht factor-1 in underfed pregnant ewes / Victoria de Brun ... [et al.]. J. Agric. Sci. Technol. A 6: 355-362, 2016.La hipótesis inicial de este trabajo fue que la mortalidad embrionaria asociada a la subnutrición en el ovino se debe principalmente a efectos sobre el ambiente materno, siendo de menor impacto la historia nutricional del embrión. Se transfirieron embriones de buena calidad provenientes de ovejas donantes sometidas a una dieta de mantenimiento (control) o alimentados a la mitad de los requerimientos nutrcionales diarios (con subnutrición) a ovejas receptoras controles o sometidas a subnutrición. Se determinaron los perfiles endocrinometabólicos en ovejas receptoras con subnutrición que mantuvieron o no la preñez luego de ser transferidas con embriones de buena calidad. Se encontró que cuando se transfieren embriones de buena calidad, independiente del estado nutricional de la oveja donante, las receptoras con subnutrición presentaron una mayor mortalidad embrionaria que las receptoras controles (Experimento I). Las receptoras subnutridas que mantuvieron la preñez presentaron mayores concentraciones plasmáticas de insulina y progesterona respecto a las hembras subnutridas que perdieron el embrión entre los días 18 y 40 de preñez (Experimento I). En el siguiente experimento se evaluó si la presencia del embrión induce cambios en el transcriptoma uterino de manera dependiente del plano nutricional, utilizando animales preñados y cíclicos controles o sometidos a subnutrición (Experimento II). La presencia del embrión al momento de reconocimiento materno de la preñez (día 14) estimuló genes relacionados con la remodelación uterina y vías del sistema inmune en hembras controles, pero eso ocurrió en menor medida en madres subnutridas. No obstante existen genes diferencialmente expresados en útero acorde a la presencia del embrión sólo en animales controles y sólo en animales subnutridos preñados vs cíclicos. En cuanto a la adaptación metabólica del útero a la preñez, se encontró que la presencia del embrión aumentó el flujo de nutrientes hacia el útero en ambos planos de alimentación, siendo menor en las hembras con subnutrición. Asimismo, los datos encontrados en el transcriptoma uterino sugieren que el embrión induce diferentes estrategias en la utilización de nutrientes entre hembras controles y con subnutrición. Estos resultados reafirman el concepto de que la subnutrición modifica el ambiente endócrino materno (sistémico y local), lo que podría explicar las mayores tasas de mortalidad embrionaria encontrada en animales sometidos a un período corto de restricción alimenticia
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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