TIME-COURSE DIFFUSION of HYDROGEN PEROXIDE USING MODERN TECHNOLOGIES

The concern with the hydrogen penetration towards the pulp can be observed on the literature by the great number of papers published on this topic; Those measurements often uses chemical agents to quantify the concentration of the bleaching agent that cross the enamel and dentin. The objective of this work was the quantification of oxygen free radicals by fluorescence that are located in the interface between enamel and dentin. It was used to accomplish our objectives a Ruthenium probe (FOXY R - Ocean Optics(R)) a 405nm LED, a bovine tooth and a portable diagnostic system (Science and support LAB - LAT - IFSC/USP). The fluorescence of the probe is suppressed in presence of oxygen free radicals in function of time. The obtained results clearly shows that the hydrogen peroxide when not catalyzed should be kept in contact with the tooth for longer periods of time.

Biomagnetic Methods: Technologies Applied to Pharmaceutical Research

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Evaluation of new red winemaking technologies through consumer liking

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Mondialisation et développement: un regard de l'Amérique Latine et des Caraïbes

Inclut la bibliographie

Information societies in Latin America and the Caribbean: development of techonologies and technologies for development

Includes bibliography

Nuevas tecnologías de participación en el trabajo con mujeres = New participatory technologies for working with women

Describe una serie de experiencias realizadas en Santiago de Chile, desde 1986 hasta 1989, en las que se emplea la técnica de la Expresión Corporal para lograr el crecimiento, el desarrollo y la participación de las mujeres de sectores marginales.

The new information technologies and women: essential reflections

Includes bibliography

Women and new technologies

Includes bibliography

Application of information and communication technologies for health systems in Belgium, Denmark, Spain, the United Kingdom and Sweden

Incluye Bibliografía

Information and communication technologies in the health sector: opportunities and challenges for the reduction of inequalities in Latin America and the Caribbean

Includes bibliography

New information and communications technologies for education in Latin America: risks and opportunities

Includes bibliography

Policies and practices for the use of information and communications technologies (ICTs) in education in Latin America and the Caribbean

Includes bibliography

Information and knowledge: the diffusion of information and communication technologies in the Argentine manufacturing sector

Includes bibliography

Resolution 672(XXXIV): establishment of the Conference on Science, Innovation and Information and Communications Technologies of the Economic Commision for Latin America and the Caribbean

Incluye Bibliografía

Resolution 672(XXXIV) Establishment of the Conference on Science, Innovation and Information and Communications Technologies of the Economic Commission for Latin America and the Caribbean

Spanish version available