Western Carpathian mid-Permian Magmatism: Petrographic, geochemical, and geochronological data.

This study presents geochemical and geochronological data from rock samples collected from the Western Carpathian mountains, eastern Slovakia. Granite assemblages that intrude the Gemeric and Veporic Superunits were imaged using a petrographic microscope to determine rock textures and their mineral assemblages. Zircon grains from seven individual portions of the Gemeric granites (Hnilec, Betliar, Elisabeth Mine, Poproc plutons) and one from the Veporic unit (Klenovec pluton) were dated using Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and Secondary Ion Mass Spectrometry (SIMS). Eight individual portions of the Gemeric unit's Betliar pluton and seven from the Klenovec granite were analyzed for major and trace elements using Fusion Inductively Coupled Plasma (ICP) and Fusion ICP-mass spectrometry. We also report detrital zircon ages from a radiolarite from the Meliata Unit that overlies blueschist and harzburgite-lizardite serpentinite assemblages near the city of Dobsiná, Slovakia. We applied X-ray Diffraction to a sample from the serpentine rocks, which reveal the presence of lizardite. The data are available for re-use to compare to future analyses of these Permian-age granites found in the Carpathian Mountains or similar Permiam assemblages elsewhere more broadly. Data reported in this article relates to G. Villaseñor, E.J. Catlos, I. Broska, M. Kohút, L. Hrasko, K. Aguilera, T.M. Etzel, J.R. Kyle, and D.F. Stockli, Evidence for widespread mid-Permian magmatic activity related to rifting following the Variscan orogeny (Western Carpathians), 2021, Lithos.

Mathematical and diffractive modeling of self-healing.

To analyze the self-healing of a partially obstructed optical beam, we represent it by two orthogonal field components. The first component is an exact copy of the unobstructed beam, attenuated by a factor that is computed by a simple formula. The second component represents a pure distortion field, due to its orthogonality respect to the first one. This approach provides a natural measure of the beam damage, due to the obstruction, and the degree of self-healing, during propagation of the obstructed beam. As interesting results, derived in our approach, we obtain that the self-healing reaches a limit degree at the far field propagation domain, and that certain relatively small phase obstructions may produce a total damage on the beam. The theory is illustrated considering a Gaussian beam, distorted by different amplitude and phase obstructions. In the case of a soft Gaussian obstruction we obtain simple formulas for the far field limit values of the beam damage and the self-healing degree.

Efficient generation of Hermite-Gauss and Ince-Gauss beams through kinoform phase elements.

We discuss the generation of Hermite-Gauss and Ince-Gauss beams employing phase elements whose transmittances coincide with the phase modulations of such beams. A scaled version of the desired field appears, distorted by marginal optical noise, at the element's Fourier domain. The motivation to perform this study is that, in the context of the proposed approach, the desired beams are generated with the maximum possible efficiency. A disadvantage of the method is the distortion of the desired beams by the influence of several nondesired beam modes generated by the phase elements. We evaluate such distortion employing the root mean square deviation as a figure of merit.

Optimum generation of annular vortices using phase diffractive optical elements.

An annular vortex of arbitrary integer topological charge q can be obtained at the Fourier domain of appropriate phase diffractive optical elements. In this context we prove that the diffractive element that generates the vortex with maximum peak intensity has the phase modulation of a propagation-invariant qth order Bessel beam. We discuss additional advantages of this phase element as annular vortex generator.

Estudio preliminar de la biocompatibilidad de la aleación zinalco / Preliminary study of Zinalco alloy biocompatibility

Hasta ahora las aleaciones a base de zinc y aluminio no han sido consideradas para uso médico por su baja resistencia a la corrosión; sin embargo, la aleación zinalco, de desarrollo reciente, posee gran resistencia mecánica y a la corrosión, por lo que ha sido de interés probar su biocompatibilidad para ser usada como material de implante. En este trabajo se estudia la respuesta del tejido aledaño a implantes de zinalco de 8 x 4 x 1 mm colocados tanto en forma subcutánea (Sc) como intermuscular (Im) en ratas hembras Wistar, usando como variables testigo, las obtenidas de ratas no implantadas (T). La respuesta clínica de los animales fue evaluada por dos observadores independientes. Al final de cada periodo se sacrificaron 4 animales con implantación Sc, 4 con implante Im y 2 ratas T, con sobredosis anestésica. Previo al sacrificio, se tomaron muestras sanguíneas de ellas para determinar la concentración de Zn A1 y Cu por el método de espectroscopia de absorción atómica (EAA). Desde el punto de vista clínico los animales mostraron una respuesta inflamatoria normal; los niveles de los metales en la sangre de las ratas implantadas no presentaron diferencias significativas en las medidas promedio obtenidas con respecto a las testigo. En el estudio histopatológico se observó neoformación de vasos sanquíneos, presencia de material amorfo aparentemente procedente del implante, mismo que se encuentra rodeado de tejido fibroso denso irregular infiltrado por leucocitos mononucleares. La reacción fue más severa en los implantes subcutáneos que en los intermusculares. Finalmente, en órganos perenquimatosos no se observó alteración