El objeto de este estudio fue el aislamiento y la caracterización de atranorina, uno de los principales constituyentes presentes en Cladina dendroides (des Abb.) y analizar su efecto antinociceptivo. La actividad antinociceptiva fue verificada por medio del ensayo en ratones…

La soja [(Glycine max L.) Mer.] puede sembrarse en una amplia zona del país en Argentina. Los ensayos comparativos de rendimiento, normalmente se realizan en 3 zonas agroecológicas: Norte, Pampeana Norte y Pampeana Sur. El análisis y la interpretación de…

This paper presents an evolution of a simulation environment where situations in which a DDB should maintain data integrity are modeled and implemented. These situations include failures taking place during transactions, and the focus is mainly on the utilization and…

We present partial results of a research project in which we use boolean circuits as a parallel computation model for the expression of queries to relational databases. For that purpose, we use the well-known equivalence between First Order Logic (FO)…

Utilizando datos de la Encuesta de Hogares para el periodo 1995-2001, se estudian los factores que explican el diferencial entre las tasas de desempleo de hombres y mujeres en Argentina. Se encuentra que este diferencial viene explicado no por diferencias…

The Web has became an obiquitous resource for distributed computing making it relevant to investigate new ways of providing efficient access to services available at dedicated sites. Efficiency is an ever-increasing demand which can be only satisfied with the development…

blic Keys Schemes usually generate two pairs of keys that bear some mathematical relation-usually, a relation of the field known as Number Theory. Identifying a key from another that is given is a problem of great difficulty. This paper presents…

The term Federated Databases refers to the data integration of distributed, autonomous and heterogeneous databases. However, a federation can also include information systems, not only databases. At integrating data, several issues must be addressed. Here, we focus on the problem…

Son presentados datos etnobotánicos sobre el uso de plantas por los herederos culturales de los africanos en Brasil. El trabajo de campo fue conducido en la ciudad de Recife, estado de Pernambuco. Se informan los nombres comunes y científicos y…

The studies of Relational Data Base Management Systems and Databases constitute nowadays a main tren of investigation in large businesses and universities of the entire world. The creation of a data base engine keeps being a challenge since there are…