1,721,065 research outputs found
Oftalmopatie iatrogene.
No full textIn questo capitolo vengono diffusamente trattate le oftalmopatie iatrogene ovvero tutte le patologie oculari derivanti da un atto terapeutico. Si possono distinguere lesioni oculari iatrogene di natura fisica o farmacologica, a seconda che siano imputabili ad una terapia fisica o all'assunzione di sostanze medicamentose
Electrochemical quartz crystal microbalance study and electrochromic behavior of a novel ruthenium purple film
No full textSYNTHESIS AND CHARACTERIZATION OF A NOVEL GLYCOPOLYMER WITH PROTECTIVE ACTIVITY TOWARD HUMAN ANTI-ALFA-GAL ANTIBODIES
No full textRole of barium ions in the anion-exchange chromatographic separation of carbohydrates with pulsed amperometric detection
No full textBarium ion is shown here as an effective component of
alkaline mobile phases for improving the separation of
carbohydrates in anion-exchange chromatography with
pulsed amperometric detection. We demonstrate that the
introduction of barium ensures a complete removal of
carbonate, making it possible to carry out a large number
of separations without column reequilibration after each
run. This is particularly helpful when diluted alkaline
eluents (i.e., <20 mM NaOH) are employed. Under such
experimental conditions, the analysis time of carbohydrates
is drastically reduced and the reproducibility of the
chromatographic data greatly improved. For example, the
normalized capacity factor (k¢/k¢0) of lactulose, which
represents the most retained compound investigated
using 16 mM NaOH as the eluent, exhibits only a slight
decrease from 1.00 to 0.94 after 7.5 h of chromatographic
run. The net improvement in the peak shape of
D-ribose, D-allose, and D-talose has been interpreted by
considering the complex formation between barium and
sugar molecules having an axial-equatorial-axial sequence
of three OH groups on the six-membered ring. The
presence of Ba(II) (0.5-0.7 mM) in alkaline eluents has
been demonstrated by ion chromatography with conductivity
detection
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
Total aniridia after nonperforating trauma of a pseudophakic eye: ultrasound biomicroscopic findings
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