Search results for " tecnología"
showing 10 items of 286 documents
Current-induced fingering instability in magnetic domain walls
2015
The shape instability of magnetic domain walls under current is investigated in a ferromagnetic (Ga,Mn)(As,P) film with perpendicular anisotropy. Domain wall motion is driven by the spin transfer torque mechanism. A current density gradient is found either to stabilize domains with walls perpendicular to current lines or to produce finger-like patterns, depending on the domain wall motion direction. The instability mechanism is shown to result from the non-adiabatic contribution of the spin transfer torque mechanism.
Comunicación: Reflexión y Praxis
1984
Se trata del texto de la intervención de José Vidal Beneyto en el "Seminario Internacional de Comunicación y Cultura", organizado por el Instituto Superior de Comunicación y Diseño de Chile, celebrado del 23 al 27 de abril de 1984 en Santiago de Chile. Se incluye el programa del congreso.
Comunicación: Reflexión y Praxis
1984
Se trata del texto de la intervención de José Vidal Beneyto en el "Seminario Internacional de Comunicación y Cultura", organizado por el Instituto Superior de Comunicación y Diseño de Chile, celebrado del 23 al 27 de abril de 1984 en Santiago de Chile. Se incluye el programa del congreso.
In Situ Characterization of Hfq Bacterial Amyloid: A Fourier-Transform Infrared Spectroscopy Study
2019
Hfq is a bacterial protein that regulates gene expression at the post-transcriptional level in Gram-negative bacteria. We have previously shown that Escherichia coli Hfq protein, and more precisely its C-terminal region (CTR), self-assembles into an amyloid-like structure in vitro. In the present work, we present evidence that Hfq unambiguously forms amyloid structures also in vivo. Taking into account the role of this protein in bacterial adaptation and virulence, our work opens possibilities to target Hfq amyloid self-assembly and cell location, with potential to block bacterial adaptation and treat infections. Fil: Partouche, David. Centre National de la Recherche Scientifique; Francia. …
Real-time detection of riboflavin production by Lactobacillus plantarum strains and tracking of their gastrointestinal survival and functionality in …
2019
Some strains of lactic acid bacteria (LAB) produce riboflavin, a water-soluble vitamin of the B complex, essential for human beings. Here, we have evaluated riboflavin (B2 vitamin) production by five Lactobacillus plantarum strains isolated from chicha, a traditional maize-based fermented alcoholic beverage from north-western Argentina and their isogenic riboflavin-overproducing derivatives previously selected using roseoflavin. A direct fluorescence spectroscopic detection method to quantify riboflavin production in bacterial culture supernatants has been tested. Comparison of the efficiency for riboflavin fluorescence quantification with and without prior HPLC fractionation showed that th…
Mercosur entre mundialización y nacionalismos
2000
Versión corta e inédita del artículo "Mercosur y la otra mundialización" (en: El País, 5 de octubre de 2000) destinada a la Embajada de España en Paraguay.
Mercosur y la otra mundialización
2000
La versión publicada de este artículo aparece también en Cassen, Bernard, et al. (2002). Attac : contra la dictadura de los mercados : alternativas a la mundialización neoliberal (pp. 111-116). Barcelona: Icaria.
Emotions and epistemology: a path for reconsideration in the 21st century
2017
The present paper explores the gap between sensations and emotions in the global capitalism. We held the thesis that there are diverse ways to systematise the theoretical orientations on which the studies on the body/emotion are based; a possible one, having in mind the Latin American context and without intent of exhaustiveness, is the following: a) a line of work connected to Foucault and his concepts of control, discipline, and technologies of the self; b) an approach connected to Bourdieu and his notions of habitus, body hexis, and social fields; c) a set of investigations in the field of biopolitics referring to Esposito and Agamben on the one hand, and to Negri and Hardt on the other;…
The application of microscopic surgery in dentistry
2007
The use of the microscope as a tool for practising Medicine, especially in surgical specialisations, has been established for decades. The microscope was first used in OdontologyDentistry back to the 1970s and 1980s, and was introduced more widely (although it was still far from being in general use) during 1990s. The purpose of this article is to describe the main applications of the microscope in OdontologyDentistry today, as well as providing odontologists and stomatologists, whether specialists or in general practice, with information about microscopic OdontologyDentistry for better patient care. This work also gives particular importance to matters needed to achieve the necessary manua…
MODELING OF A TiO2-COATED QUARTZ -WOOL PACKED-BED PHOTOCATALYTIC REACTOR
2010
A fixed-bed, photocatalytic laboratory reactor aimed to degrade pollutants from water streams was designed and built. Quartz wool coated with a thin film of TiO2 was employed as the reactor filling. The photocatalyst was placed in the reactor forming a loose packing to guarantee the intimate contact among reactants, photons, and the photocatalytic surface. This reactor was employed to study the photocatalytic decomposition of a model pollutant (formic acid). A reactor–radiation–reaction model was developed, which was comprised of the reactor mass balance, radiation model, and kinetic model for the degradation of formic acid. The local superficial rate of photon absorption, which was necessa…