ESARROLLO DE UN DISPOSITIVO DE MEDICIÓN DE CONDUCTIVIDAD ELÉCTRICA EN ALUMINIOS PLEGADOS EMPLEANDO EL MÉTODO DE LAS 4 PUNTAS

En este artículo se presenta la metodología de diseño para la fabricación de un dispositivo que permite medir la conductividad eléctrica en probetas cilíndricas de aluminio plegado. En el proceso de diseño se desarrollan diferentes etapas las cuales son: la necesidad de crear este dispositivo, sus requerimientos, evaluación, generación e integración de los conceptos para después culminar con la fabricación del dispositivo.Palabras Claves: Aluminios plegados, conductividad eléctrica, dispositivo de medición

DETERMINACIÓN EXPERIMENTAL DE LAS TEMPERATURAS DE REACCIÓN EN LA COMBUSTIÓN DE LA TELA DE ALGODÓN

Este trabajo muestra la metodología utilizada para determinar experimentalmente las temperaturas de reacción en la combustión de textiles de algodón. Dada la complejidad del fenómeno y el costo de los equipos requeridos para tal fin, se propone una técnica simplificada para valorar dichas temperaturas, utilizando dispositivos de uso común en laboratorio. Para ello, se utilizan dos termopares tipo K, almacenando sus lecturas mediante dos multímetros con puerto de comunicación, logrando monitoreo permanente de las temperaturas durante la combustión de las muestras. Las condiciones se mantuvieron lo más estable posible confinando las muestras durante las pruebas.Para su validación se comparan los resultados de hojuelas de madera con los reportados en la literatura, logrando una correspondencia aceptable.Mediante esta técnica se han determinado varios rangos de temperatura correspondientes a mecanismos de reacción presentes en la combustión de tela de algodón, contrastándose sus resultados con aquellos obtenidos mediante un TGA practicado a 5 muestras de tela de algodón, alcanzándose correspondencias muy aceptables.Palabra(s) Clave(s): Análisis; combustión; pirólisis; temperatura; TGA

Simple approach for ranking structure determining residues

Mutating residues has been a common task in order to study structural properties of the protein of interest. Here, we propose and validate a simple method that allows the identification of structural determinants; i.e., residues essential for preservation of the stability of global structure, regardless of the protein topology. This method evaluates all of the residues in a 3D structure of a given globular protein by ranking them according to their connectivity and movement restrictions without topology constraints. Our results matched up with sequence-based predictors that look up for intrinsically disordered segments, suggesting that protein disorder can also be described with the proposed methodology

Simple Approach for Ranking Structure Determining Residues

Mutating residues has been a common task in order to study structural properties of the protein of interest. Here, we propose and validate a simple method that allows the identification of structural determinants; i.e., residues essential for preservation of the stability of global structure, regardless of the protein topology. This method evaluates all of the residues in a 3D structure of a given globular protein by ranking them according to their connectivity and movement restrictions without topology constraints. Our results matched up with sequence-based predictors that look up for intrinsically disordered segments, suggesting that protein disorder can also be described with the proposed methodology

Simple Approach for Ranking Structure Determining Residues

Mutating residues has been a common task in order to study structural properties of the protein of interest. Here, we propose and validate a simple method that allows the identification of structural determinants; i.e., residues essential for preservation of the stability of global structure, regardless of the protein topology. This method evaluates all of the residues in a 3D structure of a given globular protein by ranking them according to their connectivity and movement restrictions without topology constraints. Our results matched up with sequence-based predictors that look up for intrinsically disordered segments, suggesting that protein disorder can also be described with the proposed methodology

Simple approach for ranking structure determining residues

"Mutating residues has been a common task in order to study structural properties of the protein of interest. Here, we propose and validate a simple method that allows the identification of structural determinants; i.e., residues essential for preservation of the stability of global structure, regardless of the protein topology. This method evaluates all of the residues in a 3D structure of a given globular protein by ranking them according to their connectivity and movement restrictions without topology constraints. Our results matched up with sequence-based predictors that look up for intrinsically disordered segments, suggesting that protein disorder can also be described with the proposed methodology.