1,720,975 research outputs found
Glucuronide directed molecularly imprinted solid-phase extraction: isolation of testosterone glucuronide from its parent drug in urine
No full textSolid phase extraction (SPE) from urine by using SPE material (molecularly imprinted polymer (MIP) specifically synthesized to recognize and extract testosterone and testosterone glucuronide. Qualitative and quantitative HPLC analysis of testosterone and its metabolite.
Estrazione in fase solida (SPE) da urine di sostanza avente attività biologica e tossicologica (testosterone) mediante materiale per SPE altamente specifico, sintetizzato e progettato allo scopo; successiva analisi quali-quantitativa del testosterone e suo metabolita (glucuronide
Characterisation of the binding site distribution in a 2.4 D molecularly imprinted polymer
No full textDevelopment of imprinted receptors for the class-selective solid-phase extraction of glucuronides
No full textSynthesis and chromatographic evaluation of molecularly imprinted polymers prepared by the substructure approach for the class-selective recognition of glucuronides
No full textSynthesis of molecularly imprinted polymers (MIPs) to be used as SPE material for the specific extraction of glucuronides. Application to cotinine, mycophenolic acid and testosterone glucuronides.
Sintesi di materiale per SPE altamente specifico per il riconoscimento (analisi qualitativa) e quantitativa di metaboliti (glucuronidi) di sostanze aventi attività biologica o tossicologica (cotinina, acido micofenolico, testosterone
Electrochemical sensor for Serotonin based on a composite made of core-shell molecularly imprinted polymer nanoparticles and polyethilenedioxythiophene
No full textThe 'grafting from' synthesis of core-shell molecularly imprinted polymer nanoparticles (Ser-MIP@SiO2 NPs) has been applied to the development of an electrochemical sensor for Serotonin. Ser-MIP@SiO2 NPs have been synthesized on preformed SiO2 nanobeads by surface imprinting via reversible additionfragmentation chaintransfer (RAFT) polymerization. After polymerization, the reductive aminolysis of dithioesther end group has been carried out. Then MIP-nanoparticles were subsequently characterized by ATR-FTIR, TGA, TEM and XPS. The entrapment of core-shell Ser-MIP@SiO2 NPs by the electropolymerization of PEDOT in an upside-down electrochemical cell has been investigated. Under selected conditions, results in sensing application for Serotonin are presented.</p
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
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