1,720,988 research outputs found
Study on Intermicellar Interactions and Micellar Size in Aqueous Solutions of Sodium Taurocholate by Measurements of Collective Diffusion and Self Diffusion Coefficients
No full textDisegnare Bovisa
No full textIl testo è incluso nel volume realizzato in occasione della mostra organizzata a Milano a Palazzo Morando sui disegni di Bovisa realizzati da Ampelio Tettamanti. A partire dalla disamina dell'opera grafica di Tettamanti, e più in particolare degli schizzi fatti dall'artista nella periferia milanese, il testo si concentra sui temi del disegno dal vero, eseguito sul posto, sulle sue peculiarità, nonché sulle potenzialità del disegno come strumento di visione, pensiero, memoria e narrazione
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
Acute exposure to a 2 mT static magnetic field affects ionic homeostasis of in vitro grown porcine granulosa cells. Bioelectromagnetics
No full textIn this work, we provided direct evidence for the first time that exposure to a static magnetic field (SMF) of low intensity (2 mT) is immediately followed by a reversible cell membrane depolarization wave (of about 1 min) that causes the rise of intracellular calcium and the decrease of mitochondrial activity of vital granulosa cells. These effects are likely due to the increase in Na+ and Ca2+ cell membrane permeability
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
On the Growth and Shape of Sodium Taurodeoxycholate Micellar Aggregates: a Spin-label and Quasi Elastic Laser Scattering Investigation
No full textAppropriate 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
An integrated Quasi-Elastic Light-Scattering, Pulse-Gradient-Spin-Echo Study on the Transport Properties of a,a-Trehalose, Sucrose, and Maltose Deuterium Oxide Solutions
No full textA study on D20 solutions of trehalose, maltose, and sucrose have been performed by using quasi-elastic light-scattering (QELS) and H-1 and H-2 pulse-gradient-spin-echo NMR (PGSE-NMR). The self-diffusion coefficient of disaccharide (D) and the apparent diffusion coefficient D-app have been obtained as a function of disaccharide weight fraction c and temperature (20-60 degreesC). Hydrodynamic radii at infinite dilution have been evaluated. In case of trehalose and sucrose a model of monodisperse hard spheres has been used to interpret the concentration dependence of D and D-app in the dilute region (c less than or equal to 0.1), thus obtaining the values of the hydrodynamic radii together with the diffusing particles volume fractions as a function of c and T. The invariance of the hydrodynamic radii and the agreement with the model suggest that T and c neither induce self-aggregation of the sugars nor affect sensitively their structure and hydration. The self-diffusion coefficient of D2O (D-s) at 20 degreesC has also been measured for the DO solutions of the three sugars. By following an interpretation commonly used to rationalize the self-diffusion coefficient of small molecules in colloidal systems, obstruction and hydration of disaccharide have been invoked to explain the decrease of D, as a function of c. The hydration numbers rank trehalose > maltose > sucrose has been observed in agreement with data reported in the literature
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