1,720,973 research outputs found
Synthesis, pharmacokinetics, and biological use of lysine-modified single-walled carbon nanotubes [Erratum]
No full textMulvey JJ, Feinberg EN, Alidori S, et al. Int J Nanomedicine. 2014;9:4245–4255.On page 4249 the Supplementary materials statement should have included a hyperlink to the Supplementary materials. The link is included below:http://www.dovepress.com/get_supplementary_file.php?f=79726.pdfRead the original article 
New (diphenylphosphane)benzoic acid copper(I) derivatives of “scorpionate” ligands with superoxide scavenging activity
No full textNew copper(l) complexes have been synthesized from the reaction of CuCl with 4- or 2-(diphenylphosphane)benzoic acid and KH2B(btz)(2), KHB(btz)(3), NaTp(Mc), KpzTp, KpzTp(Me) and KH2B(im)(2)(dmac). The complexes obtained have been characterized by elemental analyses and FT-IR in the solid state, and by NMR (H-1 and P-31{H-1}) and electrospray mass spectroscopy in solution. Chemiluminescence technique was used to evaluate the superoxide scavenging activity of these new copper complexes
The First Nitro-Substituted Heteroscorpionate Ligand
No full textThe new dihydridobis(3-nitro-1,2,4-triazolyl)borate ligand, [H2B(tz(NO2))(2)](-), has been synthesized in dimethylacetamide solution, using 3-nitro-1,2,4-triazole and KBH4 through careful temperature control, and characterized as its potassium salt. The zinc(II) and cadmium(II) complexes, {M[H2B(tZ(NO2))(2)]Cl(H2O)(2)], have been prepared by metathesis of [H2B(tz(NO2))(2)]K with ZnCl2 and CdCl2, respectively. The complexes likely contain a metal core in which the ligand is coordinated to the metal ions in the k(2) -N,N' or k(4)-N,N',O,O' fashion. A single-crystal structural characterization is reported for the potassium dihydrobis(3-nitro-1,2,4-triazolyl)borate. The potassium salt is polymeric and shows several K...N and K...O interactions
Small scorpionate ligands: Silver(I)-Organophosphane complexes of 5-CF3-Substituted scorpionate ligand combining a B-H...Ag coordination motif
No full textThe first 5-substituted trihydro(azolyl)borate system, the sodium trihydro(5-CF3-pyrazol-1-yl)borate, Na[H3B(5-(CF3)pz)], has been synthesized by the reaction of 3-trifuoromethyl-pyrazole with NaBH4 in high yield. Na[H3B(5-(CF3)pz)] reacts with AgNO3 in the presence of monodentate tertiary phosphanes PR3 (PR3 = P(C6H5)(3), P(p-C6H4CH3)(3), P(m-C6H4CH3)(3), P(o-C6H4CH3)(3), or PCH3(C6H5)(2)) to afford silver(l) bis(phosphane) adducts. These compounds have been characterized by elemental analyses, FTIR, ESI-MS, and multinuclear (H-1, F-19, and P-31) NMR spectroscopy. Solid-state structures of {[H3B(5-(CF3)pz)]Ag[P(C6H5)(3)](2)} and {[H3B(5-(CF3)pz)]Ag[P(p-C6H4CH3)(3)](2)} are also reported. They feature kappa(2)-N,H-bonded trihydro(pyrazolyl)borate ligands and pseudo-tetrahedral silver atoms
Silver(I)-organophosphane complexes of the dihydridobis(3-nitro-1,2,4-triazolyl)borate ligand. X-ray crystal structure of {[H2B(tzNO2)2]Ag[P(m-tolyl)3]2} with the scorpionate ligand co-ordinated in an unidentate κ1-N fashion
No full textNew silver(I) complexes have been synthesised from the reaction of AgNO3, monodentate PR3 (PR3 = P(o-tolyl)(3), P(m-tolyl)(3), P(p-tolyl)(3), P(p-C6H4F), SeP(C6H5)(3)) or bidentate tertiary (dppe = bis(diphenylpliosphane)ethane, dppf = 1,1'-bis(diphenylphosphane)ferrocene) phosphanes and potassium d ihydrobis(3-nitro- 1,2,4-triazolyl) borate, K[H2B(tz(NO2))(2)]. These compounds have been characterized by elemental analyses, FT-IR, ESI-MS and multinuclear (H-1 and P-31) NMIR. spectral data. The adduct {[H2B(tz(NO2))(2)]Ag[P(m-tolyl)(3)](2)} has been characterized by single crystal X-ray studies. In the former, the H2B( tz(NO2))(2) acts as a monodentate ligand utilizing the coordinating capability of only one of the additional (exo-) ring nitrogens to complete the coordination array about the silver atom
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
A new ester substituted heteroscorpionate ligand
No full textThe new dihydrobis(3 -carboxyethyl-5-methylpyrazolyl)borate ligand Bp(COOET,Me) is prepared as its potassium salt in kerosene solution, using ethyl 3-methylpyrazole-5-carboxylate and KBH4, through careful temperature control. Bp(COOET,Me) reacts with CuCl and PPh3 to yield the {Cu(Bp(COOET,Me))PPh3} complex. BPCOOET,Me and {Cu(BPCOOET, me)PPh3) have been fully characterized by elemental analyses and FT-IR in the solid state and by NMR (H-1, C-13 and (31)p) spectroscopy and electrospray ionization mass spectrometry in solution. A single crystal structural characterization is reported for {Cu(Bp(COOET,Me))PPh3]
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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