1,720,971 research outputs found
Nanoparticles Based on Fructose and Alkaly-Earth Halogenides with Second Harmonic Generation properties for applications as bio-sensors and for Radiotherapy
Full text linkIn recent years, some Metal Organic Frameworks with Second Harmonic Generation (SHG) properties, based on fructose and alkali-earth alogenides, were investigated to understand the effect of cation size and anion polarizability on crucial quantities correlated to the non-linear optical (NLO) response, such as hyperpolarizability and optical susceptibility [1,2]. The compounds studied are interesting for biomedicine applications, as they combine high biocompatibility, due to their non-toxic components, and significant SH emission, that can permit exploitation for in vitro bio-imaging.
Right now, a possible application in radiotherapy is under investigation. To these purposes we synthetized nanoparticles of some MOFs, based on fructose and SrX2 salts (X=Cl, I). The compounds were characterized by single-crystal and powder XRD, IR and RAMAN spectroscopy and the second-order susceptibility were estimated from theoretical calculations, both in vacuo and in the solid state. Furthermore, we attempted to assess the reduction of the SH intensity for small quantities of nano-crystals, in order to ascertain the possibility of applications in biological systems.
The nanoparticles were encapsulated in a phospholipidic shell and preliminary activity studies on target cells are in progress.
[1] D. Marabello, P. Antoniotti, P. Benzi, C. Canepa, E. Diana, L. Operti, L. Mortati, M. P. Sassi J. Mater.
Sci., 2015, 50 (12), 4330- 4341
[2] D. Marabello, P. Antoniotti, P. Benzi, C. Canepa, L. Mortati, M. P. Sassi Acta Cryst. B, accepte
Metal fragment condensation and carbon-carbon bond cleavage in the reactions of Fe3(CO)12 with RC2C(H)(OH)R’ propargyl alcohols. X-ray structures of the bowtie acetylide complexes Fe5(CO)14(C2R’)2 (R=Me,Et)
No full textHomogeneous hydrogenation of diphenylacetylene in the presence of Ru3(CO)9L3 (L=PPh3,PEt3).The crystal structure of Ru3(CO)10(PEt3)2: a reaction intermediate?
No full textOligomerisation of isopropenylacetylene in the presence of Fe3(CO)12. Crystal and molecular structure of the open cluster isomers Fe3(CO)10[H2CC(CH3)CC(H)C(H)C(CO)C(CH3)CH2], Fe3(CO)10[HCC(CH3)C(H)C(H)C(H)C(CO)C(CH3)CH2] and of the binuclear complex Fe2(CO)5[C15H18(CO)]
No full textActivation of alkynols on transition metal clusters. Reactions of ethynylcyclohexanol with Fe3(CO)12 and Co2(CO)8. Crystal structures of Co3(CO)9[m3-CCH2(C6H10OH)], Fe3(CO)9(m-CO)[m3-h2-C=C(C6H10) and Co2Fe(CO)6(m-CO)[m3-h7-(C6H9)CC(H)C(H)C(H)(C6H10)
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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
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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