Sintetica (Switzerland)

Emilio Alberich ha contribuido a la investigación de la teología catequética y de la enseñanza religiosa produciendo una vasta literatura, donde destacan sus manuales de catequética en los cuales expone de manera ordenada, sintética, accesible y profunda los ejes principales de un nuevo modelo de catequesis. En la redacción de la revista hemos decidido escuchar al profesor Alberich en tres entrevistas realizadas en los años 2007, 2012 y 2013 para tres revistas catequéticas.

Placa de aço inoxidável AISI 439 foi submetida a uma solução de chuva ácida com imidazol em diferentes concentrações, tendo como objetivo avaliar se houve inibição do meio corrosivo, através de medidas de potencial de corrosão (Ecorr).A utilização do imidazol

Air-filled polymeric microballoons were prepared with number-mean diameters of approximately 3 microns, volume-mean diameters of approximately 5 microns, and narrow particle-size distributions (standard deviation [SD] = 1.2 microns in number and SD = 2.0 microns in volume). More than 99% of the particles were below 8 microns. These particles were found to be highly echogenic for ultrasound, showing backscatter coefficients at 7.5 MHz, similar to the ones obtained with sonicated albumin microspheres. However, at 2.25 MHz, microballoons were less echogenic than albumin microspheres. These results are consistent with ultrasound attenuation measurements, which showed a maximum at 8 to 9 MHz for the microballoons compared with a reported value of 3.5 to 4.5 MHz for albumin microbubbles. Polymeric microballoons were found to be stable in plasma or under applied pressure as evidenced by unchanged particle concentration and echogenicity. Albumin microspheres were particularly unstable to applied pressure (150 mm Hg) and showed a rapid decrease in both particle counts and echogenicity.