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2. Uso da entropia e da análise de agrupamento na avaliação da disponibilidade potencial de recursos hídricos do Nordeste do Brasil.

Author

de Souza Guedes, Roni Valter, de Sousa, Solange S., and Francisco de Assis S. de Sousa

Subjects
RAINFALL, CLUSTER analysis (Statistics), HYDROLOGIC cycle, ENTROPY, ERGODIC theory
Abstract

Copyright of Revista Ambiente e Água is the property of Revista Ambiente e Agua and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2010
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3. Evaluation of corrosion resistance and cytotoxicity of electrodeposited gold on various types of intermediate layers

Author

dos Santos, W A T, Assis, S L, Rogero, S O, Terada, M, and Costa, I

Abstract

Gold plated surfaces are widely applied in several technical and decorative fields. The two main issues regarding the discussion on the field of precious metal coatings concern the increase in the use of thinner gold layers and ‘Ni free’ substrates. In order to ensure the quality of the final products, the effects of the plated surfaces on their performance require thorough and accurate research. In this paper, the corrosion resistance of gold plated nickel, copper and bronze was investigated by electrochemical methods specifically potentiodynamic polarisation and electrochemical impedance spectroscopy in phosphate buffered saline. The cytotoxicity of the gold plated substrates was also evaluated and compared. The results showed that the substrate related to the best corrosion resistance and cytotoxicity among the tested ones was bronze, and the one with the lowest performance was nickel.

Published
2012
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