La identificación de buenas prácticas en la mejora de la convivencia : un acercamiento a los centros públicos de Educación Secundaria de Cataluña

The article describes and summarizes some results of the research Identification of the difficulties, collection of good practices and analysis of the improvement processes in Secondary Education Institutes of Catalonia (2011). An approach to the situation of conviviality in the Catalan public Secondary schools gathering the perception of the management teams, through an ethnographic approach and of analysis of the stories. It has its origin in a work commissioned from the General Subdirectorate of Permanent Teacher Training of the Generalitat of Catalonia, developed in the context of the module “Conviviality and Organization of Centres”, within the program of permanent training of management teams. It falls in line with action-oriented research to improve practice. The paper gathers and synthesizes the results obtained in the collection and systematization of the proposed improvements. It is structured in three parts: a) a theoretical analysis which conceptualizes violence / conviviality and sense of good practices; b) the explanation of the design, methodology and development of research and c) the categorization of the improvement proposals and the conclusions of the work

Estudio de mejora de la demanda energética de un edificio plurifamiliar de dos viviendas en Binéfar

El objetivo de este trabajo es realizar un estudio de mejora de la demanda energética de un edificio plurifamiliar de dos viviendas en Binéfar. Para ello, en este estudio pretende se analiza la demanda actual del edificio y se proponen una serie soluciones encaminadas a reducir y mejorar los valores de esta demanda poniendo en práctica los conocimientos adquiridos en las asignaturas de Construcción Sostenible de la titulación de Grado en Arquitectura Técnica.

Sistema em fluxo para determinação espectrofotométrica de uréia em plasma de sangue animal empregando leguminosa como fonte natural da enzima urease

A spectrophotometric flow injection analysis (FIA) procedure employing natural urease enzyme source for the determination of urea in animal blood plasma was developed. Among leguminous plants used in the Brazilian agriculture, the Cajanus cajan specie was selected as urease source considering its efficiency and availability. A minicolumn was filled with leguminous fragments and coupled to the FIA manifold, where urea was on-line converted to ammonium ions and subsequently it was quantified by spectrophotometry. The system was employed to determine urea in animal plasma samples without any prior treatment. Accuracy was assessed by comparison results with those obtained employing the official procedure and no significant difference at 90 % confidence level was observed. Other profitable features such as an analytical throughput of 30 determinations per hour, a reagent consumption of 19.2 mg sodium salicylate, 0.5 mg sodium hipochloride and a relative standard deviation of 1.4 % (n= 12) were also obtained.