Entrevista a Jordi Arbonès, traductor

Entrevista a Jordi Arbonès, publicada al diari La Vanguardia, en motiu d'una visita a Catalunya

La sedimentación deltaica actual en el embalse de Cellers (Río Noguera Pallaresa, provincia de Lérida)

[Resumen] Condicionados por diversos factores, dependientes principalmente de las características morfodinámicas de la zona y del régimen de explotación, la sedimentación costera muestra un considerable desarrollo en el embalse de Cellers (río Noguera Pallaresa, provincia de Lérida). A partir de datos geomorfológicos y sedimentológicos obtenidos en superficie, en este trabajo se aborda el estudio de los cuerpos sedimentarios originados. Se describen sus características y el mecanismo de sedimentación. Por último, se incide en la previsible evolución de estos depósitos deltaicos ante hipotéticas variaciones del nivel de base.[Abstract] The Cellers reservoir at the Noguera Pallaresa river (Lérida) shows a elldeveloped sedimentacion along its shores, due to the regional dominant geomorphic processes and the exploitation regime. Using geomorphological and sedimentological data, we describe the carachteristics of the sedimentary bodies and their depositional mechanisms. We also discuss possible evolutionary trends of these deltaic deposits as a response to base level changes

Polymeric self-assemblies based on tetra-ortho-substituted azobenzene as visible light responsive nanocarriers

Most of reported polymeric light-responsive nanocarriers make use of UV light to trigger morphological changes and the subsequent release of encapsulated cargoes. Moving from UV-to visible-responsive units is interesting for the potential biomedical applications of these materials. Herein we report the synthesis by ring opening polymerization (ROP) of a series of amphiphilic diblock copolymers, into which either UV or visible responsive azobenzenes have been introduced via copper(I) catalyzed azide-alkyne cycloaddition (CuAAC). These copolymers are able to self-assemble into spherical micelles or vesicles when dispersed in water. The study of the response of the self-assemblies upon UV (365 nm) or visible (530 or 625 nm) light irradiation has been studied by Transmission Electron Microscopy (TEM), Cryogenic Transmission Electron Microscopy (Cryo-TEM), and Dynamic Light Scattering (DLS) studies. Encapsulation of Nile Red, in micelles and vesicles, and Rhodamine B, in vesicles, and its light-stimulated release has been studied by fluorescence spectroscopy and confocal microscopy. Appreciable morphological changes have been induced with green light, and the subsequent release of encapsulated cargoes upon green light irradiation has been confirmed

Intrusos cibernéticos en la clase de español/LE. Siglas, acortamientos y combinaciones en el español de la Internet

En este trabajo se reflexiona sobre unas formaciones léxicas creadas por procedimientos de abreviatura y cuyo uso se está generalizando en el lenguaje de las telecomunicaciones. Dado que cada vez es mayor la presencia de la Internet en la vida cotidiana, parece necesario estudiar una parcela terminológica que el aprendiz de E/LE deberá manejar si desea hablar de la Internet en español. This article studies new lexical forms used often in the language of telecommunications, in particular, those forms based on abbreviations. Given that the Internet is playing a greater seeks to examine one aspect of the terminology that students of Spanish as a foreign language must use in order to communicate in Spanish via the Internet

Large Bi-2212 single crystal growth by the floating-zone technique

Effects of the growth velocity on the crystal growth behavior of Bi_2Sr_2Ca_1Cu_2O_x (Bi-2212) have been studied by floating zone technique. The results show that a necessary condition for obtaining large single crystals along the c-axis is that the solid-liquid interface of a growing rod maintains a stable planar growth front. The planar liquid-solid growth interface tends to break down into a cellular interface, while the growth velocity is higher than 0.25 mm/h. Single crystals of up to 50x7.2x7 mm3 along the a-, b- and caxes have been cut in a 7.2 mm diameter rod with optimum growth conditions. Tconset is 91 K measured by magnetic properties measurement system (MPMS) for as-grown crystals. Optical polarization microscope and neutron diffraction show that the quality of the single crystals is good.Comment: 5 pages, 4 figure