1,721,018 research outputs found
Stable films of zinc-hexacyanoferrate: electrochemistry and ion insertion capabilities
Full text linkA stable film of zinc hexacyanoferrate is deposited on a GC (glassy carbon) substrate following a specific electrochemical protocol. The electrode maintains its characteristic even after dry and wet processes. SEM characterization confirms the cubic morphology of the materials and the IR suggests the presence of the FeII-C-N-ZnII structural unit. The electrochemical characterization indicates a very good stability of the film, thus opening application in ion exchange system. The focus is on monovalent, divalent, and trivalent ions. These results, the zinc low toxicity, and cost make zinc hexacyanoferrate films a promising candidate for many electrochemical applications
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
In situ X-ray absorption studies of the electrochemical reduction of hydroxoeobalamin
No full textXAS fluorescence is combined with electrochemical technique to study the reduction of hydroxocobalamin ( OH-Co(III)Cbl ) to cob(II)alamin at the cobalt K-edge. The electrochemical control permits to select a well-defined cobalt oxidation states. The experimental set-up used permits in situ reactions allowing reliable comparison among XANES spectra. The absorption edge shifts to lower energy with the progressive reduction of cobalt. The size of the peak at about 7726 eV (A peak) decrease in Co(H)cbl spectrum. Experimental XANES of OH-Co(III)cbl and Co(II)cbl were simulated by multiple scattering theory. Theoretical and experimental data are in agreement, peak intensity being correlated to the coordination number confirming that cobalt is five coordinate in Co(II)Cbl sample
La morfologia verbale nel "Decameron" e l'evoluzione del fiorentino trecentesco
No full textStudio della allotropia verbale trecentesca del fiorentino e della sua incidenza nel Decameron di Giovanni Boccaccio. Sono analizzate le desinenze di 3a pl. del passato remoto indicativo, dell'imperfetto congiuntivo e del condizionale, e la desinenza -no di 1a pl. in un corpus di testi pratici fiorentini del Trecento e nel Decameron
Stratigrafia dello Zibaldone e della Miscellanea Laurenziani
No full textAnalisi codicologica e paleografica di Zibaldone e Miscellanea laurenziani. La minuziosa analisi codicologica delle tracce materiali, combinata alla natura palinsesta delle membrane, hanno portato a ricostruire la modalità di utilizzo dei singoli fascicoli da parte di Boccaccio, che in un primo momento giacevano indistinti in una successione, forse blandamente legata, presso il loro autore. Le tappe compositive sono supportate dall'analisi paleografica in termini quantitativi. In un secondo momento l0'autore decide di costituire due codici omogenei tematicamente, operando spostamento di singoli fogli e creando le due attuali unità
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
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