Buscar recursos académicos

This article presents a simple method towards the preparation of functionalized silver nanoparticles in a continuous medium. Silver nanoparticles were obtained through AgNO3 chemical reduction in ethanol and triethylenet...

Two different approaches are used to produce conducting polymer nano-objects. One is a “top-down” approach which involves laser ablation of conducting polymer films using laser light interference patterns (direct las...

The Cerro Punta Blanca, Cerro Bayo and Cerro Punta Negra stocks, parts of the Cordillera Frontal Composite Batholith, cropping out in the Cordón del Portillo, records the Gondwana magmatic development of the Cordillera ...

Objetivo: Evaluar la utilidad de la angiotomografía computada (TC) espectral cardíaca en pacientes con ataque cerebrovascular isquémico (ACVi). Material y métodos: En el contexto de pandemia de COVID-19 incorporamos ...

RESUMO Entrevista concedida pelo historiador Carlos Guilherme Mota à revista Estudos Avançados em que o historiador aborda aspectos conceituais de sua obra e das obras de Roberto Schwarz e Florestan Fernandes, bem como...

Hydrated SiO2(111) has been projected as a competent support of an anticancer drug, 5-fluorouracil (5-FU). Theoretical calculations using the Vienna Ab-initio Simulation Package (VASP) were performed to study the drug-si...

The Ampullariidae (‘apple snails’) are freshwater caenogastropods of probable Gondwanan origin that are now indigenously distributed in tropical and temperate zones of southern North America, South America, Africa, I...

Weed species present high competitive capacity, rapid adaptability and herbicide resistance, hindering their effective control across worldwide cropping regions. Since field-conducted experiments are very time-consuming ...

Lean duplex stainless steels (LDSS) emerged as a competitive duplex stainless steels (DSS) where Ni is partially replaced by lower cost alloying elements such as Mn and N. However, to date there has been little to no inf...

La erosión hídrica y eólica del suelo sobre el que se realizan actividades de producción agrícola implica la pérdida de nutrientes y microorganismos importantes. La presencia de rastrojos o cultivos de cobertura re...

Context. Planetary nebulae (PN) have long been known to consist of gas, molecules and dust. The vast majority of the work in which properties of the dust of these objects are inferred were carried out with infrared obser...

En este artículo se analiza la cobertura periodística que realizó el diario argentino Crónica sobre los asuntos económicos entre marzo de 1976 y marzo de 1981, período durante el cual José Alfredo Martínez de Hoz...

We present a new instrument composed of a large number of sub-electron noise SkipperCCDs operated with a two stage analog multiplexed readout scheme suitable for scaling to thousands of channels. New, thick, 1.35 Mpix se...

The application of the graphical Hopf theorem (GHT) as a tool for detecting invariant cycles in maps is presented. The invariant cycle emerging from the bifurcation is approximated using an analogous version of the GHT f...

A Wiener system is a system which can be modelled as a linear dynamic followed by a static gain. The goal of this paper is to develop a robust H ∞ compensator for controlling an SISO Wiener system. The controller also ...

The first period-doubling bifurcation of a dc-dc buck converter controlled by a zero-average dynamic strategy is studied in detail. Owing to the saturation of the duty cycle, this bifurcation is followed by a border-coll...

Sexual conflict may influence the shape and evolution of body structures that males use to grasp females during mating. Not only sexual coercion but also intersexual cooperation may be involved during clasping behavior. ...

Los censos de la fauna de un país o región cualquiera, constituyen una suerte de codificación de la Naturaleza, como paso previo e indispensable para un ensayo racional de aprovechamiento de las riquezas naturales ...

Tidal flats generally exhibit ponds of diverse size, shape, orientation and origin. Studying the genesis, evolution, stability and erosive mechanisms of these geographic features is critical to understand the dynamics of...

Entender el impacto del nuevo marco normativo de alquileres tiene un elevado grado de complejidad. En este informe especial se analiza el cambio en la Ley de Alquileres, explorando los cambios que se están aconteciendo ...

In this paper, we present the environment set for validation and testing a particular ASIC that implements a piecewise linear (PWL) architecture. Description for a package debug propose is included. Methodologies for pow...

Progesterone has long been linked to breast cancer but its actual role as a cancer promoter has remained in dispute. Previous in vitro studies have shown that progesterone is converted to 5a-dihydroprogesterone (5aP) in ...

En 1915, los jóvenes artistas argentinos Ricardo Güiraldes y Alfredo González Garaño concibieron Caaporá, un proyecto de ballet que nunca llegó a escenificarse. A partir del análisis del manuscrito intentaré pens...

Ossifying fibroma (OF) of the long bones is a benign fibro-osseous lesion typically seen in the first decade of life. OF usually progresses until the age of 10 years, but is occasionally found to regress spontaneously af...