1,721,033 research outputs found
Chemoselectivity in asymmetric aminocatalysis
No full textWater makes the difference: Recent efforts to discover new strategies and principles for controlling chemoselectivity have shown how the inherent polarity of substrates and catalysts may be exploited to differentiate between aldehydic substrates with otherwise nearly identical reactivity profiles
Effect of thermostat offset for a mechanical ventilation system in a residential building in northern Italy in the cooling season
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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
Comparison of GLC-EMIT analysis for the assay of methadone and its major metabolite in urine
No full textThe enzyme-multiplied immunoassay technique (EMIT) was compared with the gas-liquid chromatographic (GLC) method in the analysis of 130 urine samples from subjects receiving methadone treatment and non-methadone controls. The GC method allowed the quantitation of 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine, the major metabolite of methadone. A good correlation was found between the two methods. The advantages of using the EMIT system are discussed. © 1978 Elsevier Sequoia S.A., All rights reserved
Concentrations of phenobarbital, flurazepam, and flurazepam metabolites in autopsy cases
No full textIn 5 cases of death resulting from acute intoxication with phenobarbital and flurazepam, the blood, urine, brain, lung, liver, and kidney levels of these drugs as well as the levels of N-1 hydroxyethyl, N-1 desalkyl, and N-1-desalkyl-3-hydroxy flurazepam metabolites were determined. Concentration of flurazepam and its metabolites was determined by using new gas chromatographic conditions employing a selective detector for nitrogen-containing substances and a column of 1% SP-1000. In addition, the EMIT technique was also employed on blood and urine samples and the results compared with GLC data
Frequency distribution of the alleles of several variable number of tandem repeat DNA polymorfisms in the Italian population
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