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Rio de Janeiro, Brazil

Da Silva M.L.A.,University Federeal Do Rio Of Janeiro | Britto A.C.M.,Fundacao Oswaldo Cruz | De Souza-Antunes A.M.,Instituto Nacional Of Propriedade Industrial
Quimica Nova | Year: 2010

The present work provides an overview of patent protection for second medical use of known chemical compounds, in Brazil and other countries, through the approach of the main controversies related to this theme. That issues encompass aspects related to the legality of the protection granted by the patent, the general requirements of patenteability, the ethic and social concepts and the politic and economic factors involved. This work also introduces the diverging views of the two Brazilian government agencies involved in the procedure for granting patent in the pharmaceutical area, INPI and ANVISA.

Dias D.H.N.,University Federeal Fluminense | Sotelo G.G.,University Federeal Fluminense | Moyses L.A.,University Federeal Do Rio Of Janeiro | Telles L.G.T.,University Federeal Do Rio Of Janeiro | And 5 more authors.
Superconductor Science and Technology | Year: 2015

The levitation force between a superconductor and a permanent magnet has been investigated for the development of superconducting magnetic bearings (SMBs). Depending on the proposed application, the SMBs can be arranged with two kinds of symmetries: rotational or linear. The SMBs present passive operation, low level of noise and no friction, but they need a cooling system for their operation. Nowadays the cooling problem may be easily solved by the use of a commercial cryocooler. The levitation force of SMBs is directly related to the quality of the superconductor material (which depends on its critical current density) and the permanent magnet arrangement. Also, research about the YBa2Cu3Ox (Y123) bulk materials has shown that artificial holes enhance the superconducting properties, in particular the magnetic trapped field. In this context, this work proposes the investigation of the levitation force of a bulk Y123 sample with multiple holes and the comparison of its performances with those of conventional plain Y123 superconductors. © 2015 IOP Publishing Ltd.

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