Políticas de formación profesional en el área de información en el Mercosur: reflexiones acerca de una experiencia de armonización curricular en Biblioteconomía

Considering the creation of Mercosul in 1991 in order to broading the national markets of Argentine, Brazil, Paraguay and Uruguay as well as to guarantee a free flow of goods, services and products, an historical overview the undergraduate library education is provided and the curricular harmonizing process started in 1996 is analyzed. Such aspects furnish background for pointing out some challenges and perspectives for building library education politics in Mercosul which could lead to an integrated higher education modelSe analiza la evolución de la formación universitaria del profesional bibliotecario, así como el proceso de armonización curricular en el área de Biblioteconomía a partir de 1996, como elementos para la construcción de una política educativa que pueda conducir a un modelo integrador de educación superior en el marco del Mercosur. (A

Volatile Compounds, Chemical Composition and Biological Activities of <em>Apis mellifera</em> Bee Propolis

Propolis is a wax-like resin collected by bees from tree shoots and/or other botanical sources that is used as glue to seal cracks or open spaces in the hive. Its color varies from green to brown and reddish, depending on its botanical origin. Among the substances that can be found in propolis, low molecular weight compounds, such as monoterpenes and sesquiterpenes are the most common. Several biological activities are attributed to these classes of substances, such as antifungal, antibacterial, and others. The objective of this work was to evaluate the chemical composition of volatile compounds present in propolis samples and to analyze their correlation with biological activities

Inflation and Dark Energy from spectroscopy at z > 2

The expansion of the Universe is understood to have accelerated during two epochs: in its very first moments during a period of Inflation and much more recently, at z < 1, when Dark Energy is hypothesized to drive cosmic acceleration. The undiscovered mechanisms behind these two epochs represent some of the most important open problems in fundamental physics. The large cosmological volume at 2 < z < 5, together with the ability to efficiently target high-$z$ galaxies with known techniques, enables large gains in the study of Inflation and Dark Energy. A future spectroscopic survey can test the Gaussianity of the initial conditions up to a factor of ~50 better than our current bounds, crossing the crucial theoretical threshold of $\sigma(f_{NL}^{\rm local})$ of order unity that separates single field and multi-field models. Simultaneously, it can measure the fraction of Dark Energy at the percent level up to $z = 5$, thus serving as an unprecedented test of the standard model and opening up a tremendous discovery space