DESIGN, DEVELOPMENT AND CHARACTERIZATION OF AN EXTREMELY LOWFREQUENCY ELECTROMAGNETIC FIELDS GENERATOR

In this article we present the results of the design, development and characterization of an extremely low frequency electromagnetic fields generator to carry out experiments with small animals. For the design of the exposure system, we took into account that its configuration should allow the application of a electromagnetic fields that meets uniformityand field intensity criteria, while making it possible to observe, manipulate and locate the sample easily, a fact that proposes accessibility requirements. For the application of different electromagnetic fields exposure protocols in the future, the generator must allow calibrated and homogeneous emissions, under known exposure conditions. Results of the constructive process are presented, in which the proposed materials and methods are analyzed, as well as the system performance results

Diseño, desarrollo y caracterización de un generador de CEM de frecuencia extremadamente baja para el trabajo con pequeños animales

En este trabajo presentamos los resultados del diseño, desarrollo y caracterización de un generador de Campos Electromagnéticos de Frecuencia Extremadamente Baja CEM-FEB para la realización de experimentos con pequeños animales. Para el diseño del sistema de exposición se tuvo como premisa que la configuración permita aplicar a la muestra un CEM que cumpla con criterios de uniformidad e intensidad de campo requeridos pero que además haga posible observar, manipular y ubicar la muestra fácilmente, lo cual impone requisitos de accesibilidad. Para la aplicación futura de distintos protocolos de exposición a CEM, el generador debe permitir realizar emisiones calibradas y homogéneas, bajo condiciones de exposición conocidas. Se presentan resultados del proceso constructivo, en los que se analizan materiales y métodos propuestos, así como de estudios de desempeño del sistema. Al final del trabajo se presentan los resultados de una prueba piloto trabajando con pequeños animales expuestos a CEM-FEB

Biotransformation of the insecticide lindane by the white rot basidiomycete Phanerochaete chrysosporium

International audienc

Biotransformation of s-triazine herbicides and related degradation products in liquid cultures by the white rot fungus Phanerochaete chrysosporium

International audienc

Fungal pretreatment by Phanerochaete chrysosporium to reduce the inhibition of methanogenesis by dehydroabietic acid

International audienceThe white-rot basidiomycete Phanerochaete chrysosporium BKM-F-1767 was tested for its capacity to degrade dehydroabietic acid (DHA). In anaerobic treatment, this molecule is the most recalcitrant member of the resin acid group, which is known to cause operational problems to anaerobic reactors treating pulp and paper industry wastewaters. In this study the effect of DHA on different parameters, such as growth, ligninolytic enzyme activity, extracellular protein production as well as both glycerol and ammonium consumption by the fungus, was determined. Although the above parameters were affected by the addition of DHA, the results show that the fungus could still produce significant titres of ligninolytic enzymes. The fungus removed 47% of the DHA initially present in the static culture, after 10 days of incubation. Anaerobic toxicity assays showed that the treatment of DHA with P. chrysosporium reduced the methanogenesis and acetogenesis inhibition caused by DHA and allowed improved methane production by the anaerobic bacteria

Comparison of static and agitated immobilized cultures of Phanerochaete chrysosporium for the degradation of pentachlorophenol and its metabolite pentachloroanisole

International audienc

Fungal pretreatment by Phanerochaete chrysosporium to reduce the inhibition of methanogenesis by dehydroabietic acid

International audienceThe white-rot basidiomycete Phanerochaete chrysosporium BKM-F-1767 was tested for its capacity to degrade dehydroabietic acid (DHA). In anaerobic treatment, this molecule is the most recalcitrant member of the resin acid group, which is known to cause operational problems to anaerobic reactors treating pulp and paper industry wastewaters. In this study the effect of DHA on different parameters, such as growth, ligninolytic enzyme activity, extracellular protein production as well as both glycerol and ammonium consumption by the fungus, was determined. Although the above parameters were affected by the addition of DHA, the results show that the fungus could still produce significant titres of ligninolytic enzymes. The fungus removed 47% of the DHA initially present in the static culture, after 10 days of incubation. Anaerobic toxicity assays showed that the treatment of DHA with P. chrysosporium reduced the methanogenesis and acetogenesis inhibition caused by DHA and allowed improved methane production by the anaerobic bacteria

Fungal pretreatment by Phanerochaete chrysosporium to reduce the inhibition of methanogenesis by dehydroabietic acid

NRC publication: Ye