V
Valder N. Freire
Researcher at Federal University of Ceará
Publications - 303
Citations - 4503
Valder N. Freire is an academic researcher from Federal University of Ceará. The author has contributed to research in topics: Density functional theory & Exciton. The author has an hindex of 31, co-authored 295 publications receiving 3874 citations.
Papers
More filters
Journal ArticleDOI
Understanding the corrosion inhibition of carbon steel and copper in sulphuric acid medium by amino acids using electrochemical techniques allied to molecular modelling methods
Glaydson L.F. Mendonça,S. Costa,Valder N. Freire,Paulo N.S. Casciano,Adriana N. Correia,Pedro de Lima-Neto +5 more
TL;DR: In this paper, six amino acids were evaluated as corrosion inhibitors for carbon steel and copper in 0.5-mol L−1 H2SO4 solution by potentiodynamic polarization and electrochemical impedance techniques allied to Density Functional Theory (DFT) and Monte Carlo computations.
Journal ArticleDOI
Structural, electronic, and optical properties of ZrO2 from ab initio calculations
Joelson Cott Garcia,Luisa Maria Ribeiro Scolfaro,A. T. Lino,Valder N. Freire,G. A. Farias,C. Silva,H. W. Leite Alves,S. C. P. Rodrigues,E. F. da Silva +8 more
TL;DR: In this paper, structural, electronic, and optical properties for cubic, tetragonal, and monoclinic crystalline phases of ZrO2, as derived from it ab initio full-relativistic calculations, are presented.
Journal ArticleDOI
Structural, electronic, and optical properties of ZrO2 from ab initio calculations
Joelson Cott Garcia,Luisa Maria Ribeiro Scolfaro,A. T. Lino,Valder N. Freire,G. A. Farias,C. Silva,H. W. Leite Alves,S. C. P. Rodrigues,E. F. da Silva +8 more
TL;DR: In this article, structural, electronic, and optical properties for the cubic, tetragonal, and monoclinic crystalline phases of ZrO2, as derived from ab initio full-relativistic calculations, are presented.
Journal ArticleDOI
Deformation induced martensite in an AISI 301LN stainless steel: characterization and influence on pitting corrosion resistance
Hamilton Ferreira Gomes de Abreu,Sheyla Santana de Carvalho,Pedro de Lima Neto,Ricardo Pires dos Santos,Valder N. Freire,Paulo Maria de Oliveira Silva,Sérgio Souto Maior Tavares +6 more
TL;DR: In this article, the deformation induced martensite formation was analyzed by X ray diffraction, electron back scatter diffraction (EBSD), magnetic methods and atomic force microscope (AFM) in samples of a low SFE austenitic stainless steel, AISI 301LN and compared with a medium SFE 316L.
Journal ArticleDOI
Resveratrol prevents social deficits in animal model of autism induced by valproic acid
Victorio Bambini-Junior,Geancarlo Zanatta,Gustavo Della-Flora Nunes,Gabriela Mueller de Melo,Marcus Silva Michels,Mellanie Fontes-Dutra,Valder N. Freire,Rudimar dos Santos Riesgo,Carmem Gottfried +8 more
TL;DR: Prenatal administration of RSV prevented the VPA-induced social impairments evaluated in this study, highlighting a promising experimental strategy to evaluate new molecular targets possibly involved in the etiology of autism and developmental alterations implicated in neural and behavioral impairments in ASD.