Estudo da adesão de pinos endodônticos modificados superficialmente por plasma de oxigênio

The work presents the effect of plasma treatment when applied in fibers or carbon/glass posts in the adhesion fiber/resin and posts/cement. This has for objective the modification of the surface of the fibers, as well as the wettability of the posts, seeking the improvement of the adhesion and of the connection fiber/resin in the processing of polymeric composites reinforced with the same ones. 120 posts (Reforpost) were used and 30 meters of fibers of carbon and of glass (Fibrex), of the company Angelus. The samples were divided in three groups of 40 specimens: GROUP I - 20 posts of glass fiber and 20 of carbon without treatment to it shapes, GROUP II -20 posts of glass fiber and 20 of carbon treated to it shapes in the surface and GROUP III - 20 posts of glass fiber and 20 of carbon make with fibers in natura after plasma treatment. The plasma treatment was accomplished with oxygen and with temperature in the camera fixed at 200°C, for one hour of exhibition. The posts and the fibers were characterized before and after the treatment. The wettability was measure by pendent drop method, and interface fiber/resin and posts/cement were observed by optical and electronic microscopy. It was observed that both wettability and texture were increased with plasma treatment

Variação de temperatura e umidade e suas influências nas características físicas e mecânicas dos fios de algodão

Cotton is a hydrofilic textile fiber and, for this reason, it changes its properties according to the environment changes. Moisture and Temperature are the two most important factors that lead a cotton Spinning sector and influence its quality. Those two properties can change the entire Spinning process. Understanding this, moisture and temperature must be kept under control when used during the Spinning process, once the environment is hot and dry, the cotton yarns absorb moisture and lose the minimal consistency. According to this information, this paper was developed testing four types of cotton yarns, one kind of cotton from Brazil and the others from Egypt. The yarns were exposed to different temperatures and moisture in five different tests and in each test, six samples that were examined through physical and mechanical tests: resistance, strength, tenacity, yarn´s hairness, yarn´s evenness and yarn´s twisting. All the analysis were accomplished at Laboratório de Mecânica dos Fluídos and at COATS Corrente S.A., where, it was possible to use the equipments whose were fundamental to develop this paper, such as the STATIMAT ME that measures strength, tenacity, Zweigler G566, that measure hairiness in the yarn, a skein machine and a twisting machine. The analysis revealed alterations in the yarn´s characteristics in a direct way, for example, as moisture and temperature were increased, the yarn´s strength, tenacity and hairness were increased as well. Having the results of all analysis, it is possible to say that a relatively low temperature and a high humidity, cotton yarns have the best performance

Os limites do poder regulamentar do Conselho Nacional de Justiça no contexto do Estado constitucional brasileiro

The creation of the National Council of Justice (CNJ) through the Constitutional Amendment nº 45/2004, derived from countless gaps in Brazilian law, mainly relating to procedural delays, ineffectiveness of judicial decisions, and the lack of mechanisms that enable, effectively, disciplinary accountability of judges. The council is constitutionally designed as a member of the Judiciary, which has administrative nature and laid assignments in art. 103-B, § 4 of the current Constitution, among which is to edit regulations to instrument its performance. However, since it came into force, the amendment raised extensive discussions, linked in particular to the constitutionality of the CNJ, which was made through the direct action of unconstitutionality nº 3367, against the alleged violation of the principles of separation of powers and federative form, as well as the limits of its regulatory powers, as has fanned out in ADI nº 3823/ DF, this one dealing on Resolution nº 07, which regulates the seal of nepotism practice in the judiciary. However, despite the Supreme Court has already pronounced on the matter, recognizing the constitutionality of the council, as well as the resolution already said, the debate is in a state of latency, and may erupt again with each new manifestation of regulatory CNJ, given the lack of agreement between doctrine and jurisprudence around the constitutional treatment of its regulatory powers. In this context undeniably reflection on the definition of the regulatory power of the CNJ, presents itself as extremely relevant, and current, in particular in the ambience of the Constitutional Rule of Law, where he strives for legal certainty and consolidation of regulatory institutions. So that it could reach a satisfactory result, skilled at resolving the problems raised, the present study analyzed the reasons that gave rise to the creation of the CNJ, demonstrating their indispensability, but also sought to characterize the status of their administrative and constitutional body, noting finally, the compatibility of its regulatory activities to constitutional principles. From this perspective, we adopted the deductive method and carried out research and bibliographic nature documentary.

Estudo da adesão de pinos endodônticos modificados superficialmente por plasma de oxigênio

The work presents the effect of plasma treatment when applied in fibers or carbon/glass posts in the adhesion fiber/resin and posts/cement. This has for objective the modification of the surface of the fibers, as well as the wettability of the posts, seeking the improvement of the adhesion and of the connection fiber/resin in the processing of polymeric composites reinforced with the same ones. 120 posts (Reforpost) were used and 30 meters of fibers of carbon and of glass (Fibrex), of the company Angelus. The samples were divided in three groups of 40 specimens: GROUP I - 20 posts of glass fiber and 20 of carbon without treatment to it shapes, GROUP II -20 posts of glass fiber and 20 of carbon treated to it shapes in the surface and GROUP III - 20 posts of glass fiber and 20 of carbon make with fibers in natura after plasma treatment. The plasma treatment was accomplished with oxygen and with temperature in the camera fixed at 200°C, for one hour of exhibition. The posts and the fibers were characterized before and after the treatment. The wettability was measure by pendent drop method, and interface fiber/resin and posts/cement were observed by optical and electronic microscopy. It was observed that both wettability and texture were increased with plasma treatment