1,292 research outputs found

    Paleopatología en la necrópolis mudéjar de El Raval (Crevillent, Alicante)

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    X Congreso Nacional de Paleopatología. Univesidad Autónoma de Madrid, septiembre de 200

    Radiative open charm decay of the Y(3940), Z(3930), X(4160) resonances

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    We determine the radiative decay amplitudes for decay into DD^* and Dˉγ\bar{D} \gamma, or DsD^*_s and Dˉsγ\bar{D}_s \gamma of some of the charmonium like states classified as X,Y,Z resonances, plus some other hidden charm states which are dynamically generated from the interaction of vector mesons with charm. The mass distributions as a function of the Dˉγ\bar{D} \gamma or Dˉsγ\bar{D}_s \gamma invariant mass show a peculiar behavior as a consequence of the DDˉD^* \bar{D}^* nature of these states. The experimental search of these magnitudes can shed light on the nature of these states.Comment: 18 pages, 9 figure

    CdTe Raman Line Shape in Resonance: a Space Correlation Zone Study

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    We show that the line shape of resonant Raman spectra of CdTe can be reproduced using the spatial correlation model (SCM). Our results show that the resonant Raman spectrum for a surface with a RMS of 430 nm is characterized by the presence of two intense sharp peaks located at frequencies corresponding to LO and 2LOmodes. The resonant Raman spectrum for a surface with a RMS of 6 nm on the other hand, can be reproduced using the contribution of high frequency phonons related with the acoustic transverse harmonics. These results suggest that under resonance conditions, such acoustic transverse modes define the line shape for a small size correlation region diameter. This study provides a new application of SCM to estimate the size grain of a surface where this information is not available

    Study of the f2(1270)f_2(1270), f2(1525)f_2'(1525), f0(1370)f_0(1370) and f0(1710)f_0(1710) in the J/ψJ/\psi radiative decays

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    In this paper we present an approach to study the radiative decay modes of the J/ψJ/\psi into a photon and one of the tensor mesons f2(1270)f_2(1270), f2(1525)f'_2(1525), as well as the scalar ones f0(1370)f_0(1370) and f0(1710)f_0(1710). Especially we compare predictions that emerge from a scheme where the states appear dynamically in the solution of vector meson--vector meson scattering amplitudes to those from a (admittedly naive) quark model. We provide evidence that it might be possible to distinguish amongst the two scenarios, once improved data are available.Comment: The large Nc argument improved; version published in EPJA

    Glutathione-Induced Release of Zeatin From Functionalized Gold Nanovectors

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    The paper shows our preliminary results on the different spectroscopic behavior of three types of gold nanoparticles (obtained respectively by chemical synthesis, laser ablation in pure water and laser ablation in a citrate solution) modified with trans-zeatin, a plant growth regulator, in presence of glutathione. The reaction of ligand substitution of the adsorbed zeatin with glutathione is studied through surface enhanced Raman spectroscopy and is revealed to occur only when citrate-laser ablated gold nanoparticles are employed, making these particles potentially good candidates as vehicles of zeatin inside plant cells for future agricultural applications

    Globally-Linked Vortex Clusters in Trapped Wave Fields

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    We put forward the existence of a rich variety of fully stationary vortex structures, termed H-clusters, made of an increasing number of vortices nested in paraxial wave fields confined by trapping potentials. However, we show that the constituent vortices are globally linked, rather than products of independent vortices. Also, they always feature a monopolar global wave front and exist in nonlinear systems, such as Bose-Einstein condensates. Clusters with multipolar global wave fronts are non-stationary or at best flipping.Comment: 4 pages, 5 PostScript figure

    Connectivity forests for homological analysis of digital volumes

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    In this paper, we provide a graph-based representation of the homology (information related to the different “holes” the object has) of a binary digital volume. We analyze the digital volume AT-model representation [8] from this point of view and the cellular version of the AT-model [5] is precisely described here as three forests (connectivity forests), from which, for instance, we can straightforwardly determine representative curves of “tunnels” and “holes”, classify cycles in the complex, computing higher (co)homology operations,... Depending of the order in which we gradually construct these trees, tools so important in Computer Vision and Digital Image Processing as Reeb graphs and topological skeletons appear as results of pruning these graphs

    Resequencing the whole MYH7 gene (including the intronic, promoter, and 3´ UTR sequences) in hypertrophic cardiomyopathy

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    MYH7 mutations are found in approximately 20% of hypertrophic cardiomyopathy (HCM) patients. Currently, mutational analysis is based on the sequencing of the coding exons and a few exon-flanking intronic nucleotides resulting in omission of single exon deletions and mutations in internal intronic, promoter, and 3´UTR regions. We amplified and sequenced large MYH7 fragments in 60 HCM patients without a previously identified sarcomere mutation. Lack of aberrant PCR-fragments excluded single exon deletions from the patients. Instead, we identified several new rare intronic variants. An intron 26 single nucleotide insertion (-5 insC) was predicted to affect pre-mRNA splicing, but allele frequencies did not differ between patients and controls (n=150). We found several rare promoter variants in the patients compared to the controls, some of which were in binding sites for transcription factors, and could thus affect gene expression. Only one rare 3´UTR variant (c.*29T>C) found in the patients was absent among the controls. This nucleotide change would not affect the binding of known micro-RNAs. Therefore, MYH7 mutations outside the coding exon sequences would be rarely found among HCM patients. However, changes in the promoter region could be linked to the risk of developing HCM. Further research to define the functional effect of these variants on gene expression should be necessary to confirm the role of the MYH7 promoter on cardiac hypertrophy.Spanish Fondo de Investigaciones Sanitarias-Fondos FEDER European Union (FIS-09/0172), and Red de Investigación Renal-REDINREN (RD06/0016)

    Measurement of D*+/- meson production in jets from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

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    This paper reports a measurement of D*+/- meson production in jets from proton-proton collisions at a center-of-mass energy of sqrt(s) = 7 TeV at the CERN Large Hadron Collider. The measurement is based on a data sample recorded with the ATLAS detector with an integrated luminosity of 0.30 pb^-1 for jets with transverse momentum between 25 and 70 GeV in the pseudorapidity range |eta| < 2.5. D*+/- mesons found in jets are fully reconstructed in the decay chain: D*+ -> D0pi+, D0 -> K-pi+, and its charge conjugate. The production rate is found to be N(D*+/-)/N(jet) = 0.025 +/- 0.001(stat.) +/- 0.004(syst.) for D*+/- mesons that carry a fraction z of the jet momentum in the range 0.3 < z < 1. Monte Carlo predictions fail to describe the data at small values of z, and this is most marked at low jet transverse momentum.Comment: 10 pages plus author list (22 pages total), 5 figures, 1 table, matches published version in Physical Review

    La formación pedagógica en el Seminario Conciliar san Miguel Arcángel de Pamplona (1834-1978) [CRÓNICA]

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    Crónica de La formación pedagógica en el Seminario Conciliar san Miguel Arcángel de Pamplona (1834-1978
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