Photoelectrocatalytical degradation of basic blue 41 dye using nanoporous semiconductor of Ti/TiO2

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Thermogravimetric investigations during the synthesis of silica-based MCM-41

MCM-41 material was synthesized starting from hydrogel containing colloidal fumed silica, sodium silicate, cetyltetramethylammonium bromide (CTMABr) as surfactant, and distilled water as solvent. These reactants were mixed to obtain a gel with the following composition: 4SiO(2):1Na(2)O:1CTMABr:200H(2)O. The hydrogel with pH=14 was hydrothermally treated at 100 degreesC, for 4 days. Each day, the pH was measured, and then adjusted to 9.5-10 by using 30% acetic acid solution. Thermogravimetry was the main technique, which was used to monitor the participation of the surfactant on the MCM-41 nanophase, being possible to determine the temperature ranges relative to water desorption as well as the surfactant decomposition and silanol condensation.

Kinetic evaluation of the pyrolysis of high density polyethylene over H-AlMCM-41 material

The AlMCM-41 material with Si/Al=50 was synthesized by hydrothermal method, using cethyltrimethylammonium as template. The protonic H-AlMCM-41 acid form was obtained by ion exchange with ammonium chloride solution and subsequent calcination. The characterization of the material by several techniques showed that a good-quality MCM-41 material was obtained. High-density polyethylene (HDPE) has been submitted to thermal degradation alone, and in presence of the exchanged H-AlMCM-41 catalyst at a concentration of 1: 1 in mass (H-AlMCM-41/HDPE). The reactor was connected on line to a gas chromatograph connected to a mass spectrometer. This process was evaluated by thermogravimetry (TG), from 350 to 600degreesC, under helium dynamic atmosphere, with heating rates of 5.0; 10.0 and 20.0 degreesC/min. From TG curves, the activation energy, calculated using a multiple heating rate integral kinetic method, decreased from 225.5 KJ.mol(-1), for the pure polymer (HDPE), to 184.7 KJ.mol(-1), in the presence of the catalyst (H-AlMCM-41/HDPE).

Oxidative Stress Impairs Vasorelaxation Induced by the Soluble Guanylyl Cyclase Activator BAY 41-2272 in Spontaneously Hypertensive Rats

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

PLANINDEX: 41-001

Contiene resumenes bibliograficos de documentos sobre planificacion y desarrollo en America Latina, recogidos y procesados en el marco del Sistema de Informacion para la Planificacion en America Latina y el Caribe (INFOPLAN).

ECLAC Notes Nº 41

Latin America and the Caribbean Will Grow 4.3% this Year How to Ensure Social Policies are Both Efficient and Effective Opinion: Hopeful Economic Scenario in Latin America and the Caribbean, by José Luis Machinea Highlights: High Youth Unemployment Creates Uncertainty Among Youth, by Jurgen Weller Indicators Teenage Pregnancies more Frequent Among Poor Girls Recent Titles Calendar

Notas de la CEPAL Nº 41

América Latina y el Caribe crecerá 4,3% este año Cómo lograr eficiencia e impacto en las políticas sociales Columna de Opinión de José Luis Machinea: Esperanzador escenario económico en América Latina y el Caribe Precisiones: Elevado desempleo juvenil crea incertidumbre entre los jóvenes, por Jürgen Weller Indicadores La maternidad adolescente es más frecuente en las muchachas pobres Publicaciones recientes Calendario

Notas de Población Vol. 41 N° 99

La edición número 99 de la revista Notas de Población destaca por la variedad de temas que se presentan en los seis artículos incluidos. En ellos se abordan cuestiones de relevancia para la investigación sociodemográfica en América Latina y el Caribe, que van desde las tendencias familiares y la edad en la primera unión y el primer hijo, hasta la migración de retorno, pasando por la información sobre las personas con discapacidad, los asentamientos precarios y las percepciones ambientales en áreas metropolitanas, entre otros.

Carta Circular de la Red de Cooperación en la Gestión Integral de Recursos Hídricos para el Desarrollo Sustentable en América Latina y el Caribe N° 41

El tema del diseño de sistemas apropiados de gestión del agua reviste enorme importancia para América Latina y el Caribe. En este documento, se destaca la asistencia técnica dada a un gran número de países en la formulación y puesta en marcha de leyes, regulaciones y políticas públicas relacionadas con los recursos hídricos. Esto siempre hecho bajo la óptica de que la inserción sustentable del agua en la economía y en la sociedad depende de un adecuado equilibrio entre intereses públicos, ambientales, económicos, sociales y privados.

Notas de Población Vol.41 N° 98

Incluye bibliografía

Network for Cooperation in Integrated Water Resource Management for Sustainable Development in Latin America and the Caribbean N° 41

• Editorial remarks.-- Open discussion: Tariffs and subsidies: the current situation and trends in the region ; State-owned utilities and the flight from public law: challenges and trends ; Challenges and opportunities in access to water and sanitation in rural areas.-- Meetings: Proposals based on the Water and Environment Initiative consensuses.-- News of the Network: Peru’s Compensation Mechanisms for Ecosystem Services Act ; Ecuador’s Act on Water Resources and Water Use and Exploitation ; The environmental dynamics of groundwater in Mexico ; The Water Citizenship Programme in the province of Mendoza, Argentina.-- Internet and WWW News