The proficiency tests are widely used to evaluate the analytical capacity of laboratories and also as part of the accreditation processes. The National Intercomparison Program is a Proficiency Test that uses radioactive reference materials in soil, vegetation, water and air filters. This work is a study of the choice of composition of radionuclides ideal to be used in the air filters to be produced by LNMRI as reference material for PNI.
Five cocktails composed of different radionuclides chosen for their energies in the range of 30 to 2000 keV were prepared, each cocktail was distributed in three glass fiber air filters using a pantograph using the pycnometer technique, contaminating each filter with 19 (nineteen) drops, totaling fifteen (15) air filter samples, with the objective of homogeneous distribution of the droplets at the sites determined by the geometry chosen without the need for marking in the filters, in order to choose the best composition to be used in the preparation of reference material.
Este artigo propõe uma discussão teórica acerca das ações relativas à Comunicação Social implementadas pelo Instituto Federal Catarinense durante a pandemia de Covid-19. O texto se configura a partir de um ponto de vista epistemológico em que tem lugar o conceito de dialogismo, do qual desdobram-se perspectivas que consideram a intersubjetividade e, por consequência, o diálogo, como o espaço em que se dá a constituição dos sujeitos e dos discursos. A despeito das dificuldades encontradas, no período pandêmico, pela Comunicação, entende-se possível o reconhecimento de aprendizados a partir dos quais podem ser delineados planejamentos estratégicos que consolidem cada vez mais a responsabilidade social da instituição e que promovam novos campos de diálogo público.
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