Biochemical effects of cadmium, salinity and temperature on the catabolism of proteins and purines in oreochromis mossambicus (Peters)

In the present investigation, three important stressors: cadmium ion (Cd++), salinity and temperature were selected to study their effects on protein and purine catabolism of O. mossambicus. Cadmium (Cd) is a biologically nonessential metal that can be toxic to aquatic animals. Cadmium is a trace element which is a common constituent of industrial effluents. It is a non-nutrient metal and toxic to fish even at low concentrations. Cadmium ions accumulate in sensitive organs like gills, liver, and kidney of fish in an unregulated manner . Thus; the toxic effects of cadmium are related to changes in natural physiological and biochemical processes in organism. The mechanics of osmoregulation (i.e. total solute and water regulation) are reasonably well understood (Evans, 1984, 1993), and most researchers agree that salinities that differ from the internal osmotic concentration of the fish must impose energetic regulatory costs for active ion transport. There is limited information on protein and purine catabolism of euryhaline fish during salinity adaptation. Within a range of non-lethal temperatures, fishes are generally able to cope with gradual temperature changes that are common in natural systems. However, rapid increases or decreases in ambient temperature may result in sub lethal physiological and behavioral responses. The catabolic pathways of proteins and purines are important biochemical processes. The results obtained signifies that O. mossambicus when exposed to different levels of cadmium ion, salinity and temperature show great variation in the catabolism of proteins and purines. The organism is trying to attain homeostasis in the presence of stressors by increasing or decreasing the activity of certain enzymes. The present study revealed that the protein and purine catabolism in O. mossambicus is sensitive to environmental stressors.

Acción formativa, conocimientos y habilidades en materia medioambiental.

El código de identificación del curso es 885.- Otros manuales con el mismo título y formato se ocupan de otros módulos de este mismo curso sin proyección educativa

Object Detection in Images by Components

In this paper we present a component based person detection system that is capable of detecting frontal, rear and near side views of people, and partially occluded persons in cluttered scenes. The framework that is described here for people is easily applied to other objects as well. The motivation for developing a component based approach is two fold: first, to enhance the performance of person detection systems on frontal and rear views of people and second, to develop a framework that directly addresses the problem of detecting people who are partially occluded or whose body parts blend in with the background. The data classification is handled by several support vector machine classifiers arranged in two layers. This architecture is known as Adaptive Combination of Classifiers (ACC). The system performs very well and is capable of detecting people even when all components of a person are not found. The performance of the system is significantly better than a full body person detector designed along similar lines. This suggests that the improved performance is due to the components based approach and the ACC data classification structure.

Plan de convivencia : convivimos en la realidad

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Aprendiendo a convivir

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad b

Aprendiendo a convivir

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Educamos todos, educamos juntos

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad A

Memoria de actuaciones en materia de convivencia

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Vivir es convivir, convivir es aprender

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Educar en el respeto

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Plan de convivencia escolar

Ganador del acc??sit de los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Resoluci??n pac??fica de conflictos

Ganador del acc??sit en los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad b

Todos tenemos algo que aportar

Ganador del acc??sit a los premios de buenas pr??cticas en materia de convivencia, Gobierno de Arag??n 2009-10. Modalidad a

Fault diagnosis by refining the parameter uncertainty space of nonlinear dynamic systems

This paper deals with fault detection and isolation problems for nonlinear dynamic systems. Both problems are stated as constraint satisfaction problems (CSP) and solved using consistency techniques. The main contribution is the isolation method based on consistency techniques and uncertainty space refining of interval parameters. The major advantage of this method is that the isolation speed is fast even taking into account uncertainty in parameters, measurements, and model errors. Interval calculations bring independence from the assumption of monotony considered by several approaches for fault isolation which are based on observers. An application to a well known alcoholic fermentation process model is presented

An LMI approach to H∞ synchronization of second-order neutral master-slave systems

The H∞ synchronization problem of the master and slave structure of a second-order neutral master-slave systems with time-varying delays is presented in this paper. Delay-dependent sufficient conditions for the design of a delayed output-feedback control are given by Lyapunov-Krasovskii method in terms of a linear matrix inequality (LMI). A controller, which guarantees H∞ synchronization of the master and slave structure using some free weighting matrices, is then developed. A numerical example has been given to show the effectiveness of the method