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Optimising piezoelectric and magnetoelectric responses on CoFe2O4/P(VDF-TrFE) n...

Magnetoelectric nanocomposite films composed of magnetostrictive CoFe2O4 nanoparticles with sizes between 35 and 55 nm embedded in P(VDF-TrFE) have been successfully prepared by a solvent casting method. The ferroelectric, piezoelectric, magnetic and magnetoelectric properties of the nanocomposite and their variation with the wt% of the ferrite filler, thickness of the composite and direction of the applie...

Isolation and characterization of a serine proteinase with thrombin-like activi...

A serine proteinase with thrombin-like activity was isolated from the venom of the Central American pit viper Bothrops asper. Isolation was performed by a combination of affinity chromatography on aminobenzamidine-Sepharose and ion-exchange chromatography on DEAE-Sepharose. The enzyme accounts for approximately 0.13% of the venom dry weight and has a molecular mass of 32 kDa as determined by SDS-PAGE, and of 27...

Evaluación de los sistemas de depuración natural

La fase de experimentación de los diferentes proyectos pilotos de depuración natural, su evaluación y seguimiento, ha constituido uno de los pilares fundamentales del Proyecto DEPURANAT. Los socios responsables de los proyectos piloto incluidos en dicha fase de Experimentación y Demostración establecieron, de forma común, un protocolo único de seguimiento, tanto analítico como de supervisión de la operación de ...

Evaluation of antivenoms in the neutralization of hyperalgesia and edema induce...

Neutralization of hyperalgesia induced by Bothrops jararaca and B. asper venoms was studied in rats using bothropic antivenom produced at Instituto Butantan (AVIB, 1 ml neutralizes 5 mg B. jararaca venom) and polyvalent antivenom produced at Instituto Clodomiro Picado (AVCP, 1 ml neutralizes 2.5 mg B. aspar venom). The intraplantar injection of B. jararaca and B. asper venoms caused hyperalgesia, which peaked 1...

Venomous snakebites in children and adolescents: a 12-year retrospective review

Snakebite envenomation is a worldwide problem and in Costa Rica. The following is a retrospective review of 79 patients admitted to the Hospital Nacional de Niños (HNN) from January 1985 to September 1996. Child's age ranged from 9 months to 14 years. The M: F ratio was 1.5:1. Sixty percent of the patients lived in remote rural areas. The most common clinical signs at the time of hospitalization were pain and e...

STUDIES ON THE MECHANISM OF ACTION OF MYOTOXIC PHOSPHOLIPASES A2 ISOLATED FROM ...