Radiofármacos PET

Dada la tasa actual de evolución de la biología molecular de los receptores del SNC, la diferencia entre el número de radiotrazadores disponibles y las drogas potenciales va creciendo rápidamente99. Debemos por tanto insistir en que la utilidad de la tecnología PET en la búsqueda de nuevos agentes terapéuticos descansa sin duda en la obtención de compuestos marcados, por lo que la potenciación de la radioquímica y la radiofarmacia van a ser puntos clave en el desarrollo de este apasionante campo

Effect of vinyl acetate effluent in reducing heat of hydration of concrete

Waste generation especially in surface coating industries is a potential pollutant to the environment globally. Waste disposal in the form of recycling or reused has gained some recognition as a raw material in many kind of interested fields. This study is therefore, aimed at utilizing Vinyl acetate effluent generated from manufacturing process of paint as polymer modifier in concrete. The research highlights the influence of Vinyl acetate effluent on setting time and control of heat of hydration in concrete. Three specimens containing 0%, 2.5% and 5% of Vinyl acetate effluent by weight of cement were prepared in cubic moulds. The temperature rises due to heat of hydration in all mixes were recorded. Finding shows that incorporating Vinyl acetate effluent considerably delayed the setting time in cement paste and reduced the total temperature rise in polymer modified concrete. Therefore, addition of Vinyl acetate effluent polymer in concrete may improve the properties of concrete to some extent particularly in mass concrete production