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The article aims to understand the dynamics of student occupations in Minas Gerais (MG) in 2016 and to analyze the formative practices experienced by the occupiers, based on bibliographic review and semi-structured interviews. Based on the legacy of the reflection on the educational character of social movements, in comparison with Ranciére's notion of political subjectivation, we conclude that movement in MG, in its political dynamics, marked the occupiers in a contradictory way, but highlighting training practices that renew the educational tradition of progressive social movements. El artículo tiene como objetivo comprender la dinámica de las ocupaciones de los estudiantes en Minas Gerais (MG) en 2016 y analizar las prácticas formativas experimentadas por los ocupantes, en base a una revisión bibliográfica y entrevistas semiestructuradas. Con base en el legado de la reflexión sobre el carácter educativo de los movimientos sociales, en comparación con la noción de subjetivación política de Ranciére, concluimos que el movimiento en MG, en su dinámica política, marcó los ocupantes de manera contradictoria, pero destacando las prácticas formativas. que renuevan la tradición educativa de los movimientos sociales progresistas. O artigo tem como objetivos conhecer a dinâmica das ocupações estudantis em Minas Gerais (MG) em 2016 e analisar as práticas formativas vividas pelas e pelos ocupas, com base em revisão bibliográfica e entrevistas semiestruturadas. Com base no legado da reflexão sobre o caráter educacional dos movimentos sociais, em cotejo com a noção de subjetivação política de Ranciére, concluímos que o movimento em MG, em sua dinâmica política, marcou as e os ocupas de forma contraditória, mas se destacando práticas formativas que renovam a tradição educacional dos movimentos sociais progressistas.

Since the beginning of the HIV epidemic, research has been carried out to control the virus. Understanding the mechanisms of replication has given access to the various classes of drugs that over time have transformed AIDS into a manageable chronic disease. The class of protease inhibitors (PIs) gained notice in anti-retroviral therapy, once it was found that peptidomimetic molecules act by blocking the active catalytic center of the aspartic protease, which is directly related to HIV maturation. However, mutations in enzymatic internal residues are the biggest issue for these drugs, because a small change in biochemical interaction can generate resistance. Low plasma concentrations of PIs favor viral natural selection; high concentrations can inhibit even partially resistant enzymes. Food-drug/drug-drug interactions can decrease the bioavailability of PIs and are related to many side effects. Therefore, this review summarizes the pharmacokinetic properties of current PIs, the changes when pharmacological boosters are used and also lists the major mutations to help understanding of how long the continuous treatment can ensure a low viral load in patients.

The radium isotopes 226Ra and 228Ra were analyzed in surface water at six points in the neighborhood of a mine of phosphate, associated with uranium, in the region of Santa Quiteria, state of Ceara, Brazil. Water samples were collected during twenty months, filtered and the concentrations of activity determined in the soluble and particulate phases. The results were analyzed using the Principal Component Analysis (PCA) for ordination of environmental data, and also by ANOVA, Tukey and Z tests to compare sets of data considering the radionuclides, the two analyzed phases and the six collecting points. The PCA identified four groups that included all collecting points, using aggregation features such as radionuclide and analyzed phase. The first group is composed by the samples of 226Ra in the soluble phase; the second group by samples of 226Ra in the particulate phase; the third one by 228Ra in the soluble phase, and finally, the fourth group by 228Ra in the particulate phase. This last group has two discrepant points (01 and 06). Statistical analysis identified differences between the concentrations of activity of radionuclides (228Ra higher than 226Ra) and in analyzed phases (soluble phase higher than the particulate one) but showed no differences between sampled points.

This study aims to assess the behavior of the release of Unat (i.e. uranium isotopes in natural relative abundance) from the release of water treated by the Ore Treatment Unit (UTM) in Caldas, state of Minas Gerais, Brazil, during the years 1999 to 2009. During this period, the unit showed no industrial activity, except between 2004 and 2005, when UTM operated 400 tons of monazite in a process to obtain rare earths. Unat was analyzed by spectrophotometry once per week in the effluent waters at sampling point 014. Two fractions were considered for analysis: the soluble one (that passes through a 0.45 μm filter) and the particulate one (retained on a 0.45 μm filter). Statistical analyses were performed: the “Z” test and Pearson’s r2 correlation index. The values for the soluble fraction were consistently lower than those of the particulate fraction and no statistically significant correlation was observed between the soluble and particulate fractions. However, the particulate and the total fractions (the sum of soluble and particulate) strongly correlated.

Em 2007, a International Commission on Radiological Protection (ICRP) divulgou um conjunto de recomendacoes sobre radioprotecao na sua publicacao N o 103 que mudaram alguns conceitos importantes contidos no documento anterior (N o 60). Este trabalho visa comparar a norma basica de protecao radiologica brasileira (CNEN-NN-3.01) com as novas recomendacoes da ICRP atraves das diferencas existentes entre esses dois documentos. A principal diferenca entre as publicacoes CNEN-NN-3.01 e No 103 da ICRP e a mudanca do conceito de protecao baseada no processo, pelo uso dos conceitos de pratica e intervencao, para a protecao baseada na situacao de exposicao, atraves dos conceitos de exposicao planejada, emergencia e situacao existente. Para adequar a norma brasileira e necessario mudar seu conceito de protecao e os valores de ponderacao das radiacoes e dos tecidos, atualizar os valores dos detrimentos causados pelas radiacoes, alem de tornar claro o conceito de radioprotecao ambiental.