Antibacterial activity of the marine sponge Ircinia Campana collected at Punta Uva Limón against Staphylococcus Aureus

The sponges are simple multicellularorganisms; they inhabit in marine environments from the polar seas to the tropical waterswhere they are more abundant. These species are exposed to large populations of microbes, reason that explains their complex morphological and cellular defense mechanism, which are used by these organisms to fight against pathogens. The purpose of this study was to evaluate the antibacterial activity of the marine sponge Ircinia campana, whichinhabits in the south of the Caribbean coast of Costa Rica against  Sthapylococcus aureus gram-positive bacteria. Sampleswere collected in Punta Uva in Limónduring July of 2007. The active compounds were obtainedby extraction with acetone (crude extract); and subsequently, chromatographic extracts were obtained using fractions 1:4 hexane: ethyl acetate. The antibacterial activities of the different fractions, including the  crude extract were tested.Our results suggest a zone of inhibition of 14.60 ±0.25 mm for the crude extract and18.70±0.25mm for the most active fraction separated by chromatography. The metabolite responsible for the antibacterial activity was isolated by High Performance Liquid Chromatography (HPLC)and preliminarily characterized through ultraviolet (UV) and infrared (IR) spectroscopy.

Retornos del marx rechazado

Karl Marx (1818-1883) es el teórico que mejor ha explicado cómo funciona y por que no funciona el capitalismo. Sin embargo, la lectura de su obra cumbre, El Capital, no es una tarea fácil. En este texto se reflexiona acerca de los factores que dificultan al lector esta tarea, así como la importancia de recuperar una obra que analiza los orígenes y que propone la lucha contra la injusticia social inherente al capitalismo. Abstract Karl Marx (1818-1883) is the theoretician who has better explained how and why the Capitalism does not work. Nevertheless, the reading of its work summit, The Capital, is not an easy task. In this text the author reflects about the factors that make difficult this task to the reader as well as the importance of recovering a work that analyzes the origins and proposes to fight against the social injustice inherent to capitalism.

Existencia del derecho penal del enemigo en el derecho penal internacional

Sin duda alguna, el debate sobre el derecho penal del enemigo es una cuestión que está revolucio­nando el mundo del derecho, en general, y el derecho internacional en particular. Es un debate de actualidad que está llamando la atención de la comunidad académica, en tanto se plantea y se avizora un problema de fondo, en cuanto a la efectiva protección de los derechos humanos, por encima de un discurso de seguridad, que se viene planteando como eje central en la comunidad internacional, en la lucha contra el terrorismo y como estrategia jurídico-política al interior de Estados que dicen llamarse democráticos. Esta situación está revolucionando desde cualquier punto de vista la concepción tradicional del derecho, violentando flagrantemente la dignidad humana como eje central del Estado Social de Derecho, al poner en práctica lo que Jakobs denomina “dere­cho penal del enemigo”, práctica que también se viene fortaleciendo y traspasándose del ejercicio del ius puniendi de los Estados, como manifestación de soberanía, al derecho penal internacional.Abstract Without any doubt, the debate about the penal right of the enemy is a question that is revolutionizing the world of law in a general level, and international right in particular. It is a current debate that is drawing the attention of the academic community, as it poses as a basic problem: the effective protection of the human rights, over a security discourse which is presented as central in the international community in the fight against terrorism, and as a legal-political strategy to the interior of the so called democratic States. This situation is revolutionizing, from different points of view, the traditional conception of law, flagrantly violenting the human dignity as the central axis of the Social State of Right, putting in practice what Jakobs denominates “Criminal law for the enemy”. This practice is being fortified and transferring from the exercise of ius puniendi of the States, as manifestation of sovereignty, to the international penal right.