Experiencia didáctica de química para la determinación de parámetros característicos en frutos cítricos de la Región de Murcia.

Los alumnos han realizado una visita al Instituto Valenciano de Investigaciones Agrarias en el que se les amplió la información sobre estos temas

Las NT en como herramienta de mejora del proceso enseñanza-aprendizaje en estudios avanzados: PROCCA-09 y su influencia en la mejora del aprendizaje de la asignatura 'diseño avanzado de equipos de transferencia de calor' del máster de ingeniería química

El Método de simulación por redes (MESIR) aplicado a la resolución de problemas en ingeniería, aúna todo el potencial existente en la analogía termo-eléctrica con la potencia de los ordenadores. El registro del programa PROCCA-09 basado en el MESIR es resultado del trabajo de dos grupos de investigación de la UMU y la UPCT. Entre las ventajas de esta herramienta, en contraposición con las prácticas de laboratorio, podemos citar: es generalmente más económica, no tiene riesgos, portátil, fomenta el aprendizaje significativo, etc. En la comunicación se presentan algunas experiencias y resultados de la mejora del proceso de enseñanza-aprendizaje con esta herramienta

Análise química de produtos de incrustação em dutos de petróleo por espectometria de fluorescência de raios X

The quantitative chemical characterization of the inorganic fraction of scale products is very relevant in studying, monitoring and controlling corrosive processes of oil pipelines. The X-ray fluorescence spectrometry (XRF) is a very versatile analytical technique, which can be used in quantitative analysis in solid samples at low concentrations of the chemical element, in the order of few ppm. A methodology that involves sample preparation diluted in the proportion of 1:7 (one portion of the sample for seven of wax), pressed as pellets was used in the XRF calibration for chemical analysis of scale products from oil pipelines. The calibration involved the preparation of reference samples from mixtures of P.A. reagents, aiming to optimize the time consumed in the steps of sample preparation and analysis of Al, Ba, Ca, Fe, K, Mg, Mn, Na, P, S, Si, Sr and Ti, using the same pressed pellet for trace and major elements analysis

Obtenção e caracterização físico-química de blendas poliméricas, baseadas em POE e PMMA, dopadas com dióxido de titânio

The study of polymer blends has been an alternative method in the search field of new materials for obtaining materials with improved properties. In this work blends of poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) doped with titanium dioxide (TiO2) were studied. The PEO is a polymer semicrystalline structure varying between, 70 and 84% crystallinity, while the PMMA exhibits behavior amorphous in their structure. The use of TiO2 is related to corrosion-resistant of titanium as well as good heat transfer and other characteristics. The study of these polymer blends doped TiO2 gives the properties junction organic (polymer) and inorganic (oxide) which leads to modification of the properties of the resultant material. The blends were doped TiO2 (POE/PMMA/TiO2) in different proportions of the PMMA with the PEO and TiO2 fixed. The ratios were: 90/10/0,1; 85/15/0, 1; 80/20/0,1, 75/25/0,1 and 70/30/0,1. The resulting material was obtained in powder form and being characterized by Fourier Transformed Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and Electrochemical Impedance Spectroscopy (EIS). The infrared spectra (IR) for the blends in different ratios showed a band at 1744 cm-1, characteristic of the C=O stretching, which increases in intensity with increasing PMMA composition, while in the spectrum of pure PEO this band is absent. This may suggest that the interaction is occurring between the polymers. In the micrographs of the blends also observed change in their surfaces with variation of the composition of PMMA, contributing to the change of the electrical properties of the material. The EIS data showed that the material exhibited conductivity of the order of 10-6 S.cm-1. The blend in the ratio B2(85/15/0, 1) showed better conductivity, σ = 1.56 x 10-6 S.cm-1. It was observed that the diffusion coefficient for the blends, B5(70/30/0, 1) was the largest, 1.07 x 10-6 m2.s-1. The XRD data showing that, with the variation in the composition of the PMMA blend crystallinity of the material is decreased reaching a minimum B3(80/20/0,1), and then increases again. Thermal analysis suggests that blends made from the material obtained can be applied at room temperature

Efeitos do treinamento aeróbio na hepatocarcinogênese química em ratos Wistar alimentados com dieta basal ou hiperlipídica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo das partículas inorgânicas de resinas compostas: revisão sistemática e caracterização química e morfológica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilização de uma matriz híbrida orgânica-inorgânica na dinâmica de liberação controlada de fármacos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Plataforma inorgânica a base de apatitas de interesse biológico visando à liberação controlada de fármacos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise isotópica (Delta15N) e química do capim-marandu adubado com ureia e cama de frango e diferido

Pós-graduação em Zootecnia - FMVZ

Avaliação da proliferação celular na próstata de gerbilos vasectomizados, após indução química pela injeção intraperitoneal do carcinógeno N-metil-N-nitrosuréia (MNU)

Prostate cancer is the second leading cause of cancer death in the country. Due to this factor, the interest of showing what relationship exists between vasectomy surgery and the incidence of prostate carcinoma has started. Some epidemiological studies showed an increased risk of prostate cancer in vasectomized men (Emard et al., 2001). On the other hand other authors have argued that there is no correlation (Patel et al., 2005) and there are those who said that vasectomy is linked to reduced risk of prostate cancer (Ross, 1983). Faced with an analysis of published works, such discussion remains today. The vasectomy, or deferentectomia, is a contraceptive male method, which is the section of the vas deferens of man by preventing the sperm from being expelled along with the seminal fluid during ejaculation, and is one of the most simple, economical, uncomplicated post- operative. This study aims to evaluate the process of cell proliferation and to evaluate immuno-histochemically the expression of specific markers of PCNA (Proliferating Cell Nuclear Antigen) and Ki-67, in the prostate of the gerbil after chemical induction by intraperitoneal injection of the carcinogen N-methyl -N-nitrosourea (MNU), because the regulation of the functional balance between cell proliferation and apoptosis is associated with hyperplasia and prostatic carcinoma. The experimental procedure was performed at the Laboratory of the Department of Anatomy, along with collecting the data for later analysis

Síntesis y caracterización de fotocatalizadores basados en TiO2 : estudios de la degradación de los herbicidas ácido 2,4-Diclorofenoxiacético y bentazona mediante fotocatálisis heterogénea a escala de laboratorio y planta piloto solar

Programa de doctorado: Ingeniería ambiental y desalinización

Musgos como bioindicadores de contaminación metálica: caracterización físico-química en términos de adsorción

[EN] Bioindicators have been used in urban and industrial areas to control the atmospheric pollution because it constitutes one of the most important environmental problems of human health. In this sense, mosses are able to reflect the chemical composition of surrounding atmosphere that together with the easy production techniques becomes mosses as one of the potential bioindicators in Europe. This study is part of the Mossclone project (FP-7) and quantifies the adsorption of heavy metals on 4 typical moss species in order to propose one of them to be used for environmental monitoring in the moss bag technique.

Prácticas de Química Analítica

[ES]Preparación y Normalización de Disoluciones (Determinación gravimétrica de la humedad, Preparación y normalización de disoluciones, Disolución de aleaciones); Valoraciones Volumétricas (Introducción a la Valoración Volumétrica, Reacciones ácido-base, Reacciones de oxidación-reducción, Reacciones de precipitación, Reacciones de formación de complejos); Espectroscopía (Espectroscopía de Absorción molecular, Determinación de ácido benzoico, Determinación de calcio y magnesio, Determinación de hierro, Espectroscopía de Absorción Atómica); Métodos Electroanalíticos (Potenciometría, Electrodos Selectivos, Determinación potenciométrica, Valoración conductimétrica); Métodos de Separación (Cromatografía en capa fina, Cromatografía de gases, Cromatografía líquida de alta resolución (HPLC)); Normas de seguridad en el laboratorio, Material de laboratorio, Análisis de error y tratamiento de datos