1,720,958 research outputs found
PAW PREFERENCE AND BRAIN DOPAMINE ASYMMETRIES
No full textThe hemispheric content of dopamine and its metabolites in the frontal cortex, caudatus putamen and nucleus accumbens septi was evaluated in relation to behavioral lateralization assessed by paw preference. Three groups of C3H/He mice were selected on the basis of their performance in the paw preference test (left-handed, ambidextrous and right-handed) and levels of dopamine and its metabolites were measured in the two hemispheres of each group. Mice showed significant differences in hemispheric content of dopamine and 3-4 dihydroxyphenylacetic acid in the nucleus accumbens septi depending on the behavioral lateralization as expressed by paw preference. The hemispheric dominance (right hemisphere/right hemisphere + left hemisphere content of dopamine and metabolites x 100) was also calculated for each mouse. Significant differences in hemispheric dominance for dopamine, 3-4 dihydroxyphenylacetic acid and 3-methoxytyramine in the nucleus accumbens were found between right-handed and left-handed mice. This dominance was ipsilateral to the preferred paw: % right hemisphere/total content of dopamine and its metabolites were lowest in left-handed, highest in right-handed and intermediate in ambidextrous mice. Finally, individual % right hemisphere/total content for dopamine, 3-4 dihydroxyphenylacetic acid and 3-methoxytyramine in the nucleus accumbens positively correlated with individual paw preference scores. The analysis of the other brain areas did not reveal any significant effect. These results suggest a strong relationship between mesoaccumbens dopamine asymmetries and both the direction and the intensity of behavioral lateralization as expressed by paw preference in mice
Influence of brain and behavioral lateralization in brain. Monoaminergic, neuroendocrine, and immune stress responses.
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Influence of early life events on immune reactivity in adult mice.
No full textThe effects of postnatal manipulations on different immune parameters were investigated in adult female mice. Postnatal stress consisted of a 15-min daily exposure to clean bedding (temperature maintained at 35 degrees C) for the first 2 weeks of life in the absence of the mother but in the presence of littermates. Controls were unhandled until weaning. At 60 days of age, female mice stressed during postnatal development showed enhanced immune reactivity as assessed by NK-cell activity and T-cell mitogenesis in comparison with unhandled mice. By contrast, B-lymphocyte proliferation induced by lipopolysaccharide (LPS) was not affected by alterations of postnatal environment. Furthermore, the association between immune reactivity and behavioral lateralization observed in adult mice was not altered by postnatal stress
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
- …
