Ines R. de Moraes
نویسندگان
چکیده
A adsorção de íon sulfato em eletrodos de Rh(111), Rh(100) e Rh(110) foi estudada utilizandose a técnica de espectroscopia de FTIR por reflectância in situ. Foi observada somente uma banda vibracional localizada acima de 1200 cm-1 para as três superfícies com baixo índice de Miller e uma banda fraca em 960 cm-1 para o sulfato adsorvido em Rh(111). A banda forte acima de 1200 cm-1 é dependente do potencial com uma variação de 50 cm-1 V-1. Não foram observadas diferenças espectrais ao se variar a acidez da solução de forma a gerar soluções contendo sulfato ou sulfato ácido. Este resultado é interpretado em termos de uma dissociação completa dos íons, produzindo somente SO4 2adsorvido. A orientação da superfície afeta somente a quantidade de espécies sulfato adsorvidas. Parece que o mesmo tipo de adsorbato é encontrado em Rh(111), Rh(110) e Rh(100).
منابع مشابه
Aggressive unicystic ameloblastoma affecting the posterior mandible: late diagnosis during orthodontic treatment
Maxillofacial images must be examined to find pathologies not identified during clinical examination. Unicystic ameloblastoma (UA) extending to the mandibular body and ramus was neglected on initial panoramic radiographic examination. After orthodontic therapy, a huge lesion was observed clinically and through imaging exams. After the conservative surgery, no recurrence was observed during five...
متن کاملEffect of treatment with sitagliptin on somatosensory-evoked potentials and metabolic control in patients with type 2 diabetes mellitus.
OBJECTIVE To evaluate the effect of sitagliptin on somatosensory-evoked potentials (SEPs) and metabolic control in patients with type 2 diabetes mellitus without clinical diabetic neuropathy. MATERIALS AND METHODS Interventional, prospective, and open study. Patients with less than six months from the diagnosis were included. Examinations of SEPs and laboratory tests at fasting and after food...
متن کاملLimit Cycles for a Class of Continuous and Discontinuous Cubic Polynomial Differential Systems
We study the maximum number of limit cycles that bifurcate from the periodic solutions of the family of isochronous cubic polynomial centers ẋ = y(−1+2αx+2βx), ẏ = x+α(y−x)+ 2βxy, α ∈ R, β < 0, when it is perturbed inside the classes of all continuous and discontinuous cubic polynomial differential systems. We obtain that the maximum number of limit cycles which can be obtained by the averaging...
متن کاملCLINICAL SCIENCE Ocular findings in patients with systemic sclerosis
Beatriz de A. F. Gomes, Marcony R. Santhiago, Priscilla Magalhães, Newton Kara-Junior, Mário N. L. de Azevedo, Haroldo V. Moraes Jr. I Ophthalmology Department, Federal University of Rio de Janeiro, RJ, Brazil. II Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH, USA. III Rheumatology Department, Federal University of Rio de Janeiro, RJ, Brazil. IV Ophthalmology Department, Faculd...
متن کاملVirus-Like Particles as a vaccinal strategy against tumors induced by papillomavirus infection
E. C. Coimbra, H. M. de Souza, M. C. G. Leitão, J. F. dos Santos, W. Beçak, R. C. Stocco dos Santos, A. C. Freitas Departamento de Genetica, Centro de Ciências Biologicas, Universidade Federal de Pernambuco, Av. Moraes Rego, s/n, 50670-901, Recife, Pernambuco, Brazil Laboratório de Genética, Instituto Butantan, Av. Vital Brazil, 1500, 05503-900, São Paulo, São Paulo, Brazil Setor de Biologia Mo...
متن کامل