Antimicrobial properties of sea anemone Anthopleura nigrescens from Pacific coast of Costa Rica

Objective: To evaluate the antimicrobial and antifungal activities of the aqueous and partitioned extract of sea anemone Anthopleura nigrescens (A. nigrescens). Methods: The sea anemone A. nigrescens was collected, minced, homogenized, lyophilized and then further partitioned with diethyl ether, acetone, ethanol and water. These fractions were evaluated for antimicrobial activity against bacterial and fungal pathogens. Results: Acetone extract was found to produce a pronounced inhibition of 7.0 mm against Proteus vulgaris and diethyl ether extract inhibited Pseudomonas aeruginosa with an inhibition zone of 6.5 mm. In antifungal activity, ethanol extract showed good activity against Botrytis cinerea, Trichoderma harzianum and Rhizopus oryzae compared with other strains. Acetone and ethanol extract of A. nigrescens showed activity against all of pathogens tested. Slight activity was observed in the water extract with inhibition zone of 1.5 mm. Conclusions: The present study revealed that sea anemone A. nigrescens may also contain some biologically active agents which have potential activity against pathogenic microorganisms.

Tensiones en la construcción identitaria individualizada en el trabajo flexible / Tensions in individual identity construction in flexible working

El presente trabajo se propone una reflexión acerca de las tensiones y contradicciones de los procesos de construcción identitaria en el trabajo flexible, a partir de los resultados de una investigación en empresas chilenas. El análisis propone la existencia de dinámicas caracterizadas por la tensión entre los elementos heredados de la trayectoria y los aspectos deseados a nivel identitario, así como de las distancias y contradicciones existentes entre la dimensión individual y la colectiva de la construcción identitaria.

The article proposed a reflection on the tensions and contradictions of identity construction processes in flexible work, within the results of a research in some Chilean companies. The analysis suggests the existence of dynamics characterized by a tension between inherited elements from the trajectory and desired aspects in an identity level, as well as distances and contradictions between individual and collective dimensions of identity construction.