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Search Results: 1 - 10 of 401854 matches for " Alda M;Filgueiras "
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Atypical Mucocutaneous Leishmaniasis Caused by Leishmania braziliensis in an Acquired Immunodeficiency Syndrome Patient: T-cell Responses and Remission of Lesions Associated with Antigen Immunotherapy
Da-Cruz Alda M,Filgueiras Danilo V,Coutinho Ziadir,Mayrink Wilson
Memórias do Instituto Oswaldo Cruz , 1999,
Abstract: An atypical case of acquired immunodeficiency syndrome-associated mucocutaneous lesions due to Leishmania braziliensis is described. Many vacuolated macrophages laden with amastigote forms of the parasite were found in the lesions. Leishmanin skin test and serology for leishmaniasis were both negative. The patient was resistant to therapy with conventional drugs (antimonial and amphotericin B). Interestingly, remission of lesions was achieved after an alternative combined therapy of antimonial associated with immunotherapy (whole promastigote antigens). Peripheral blood mononuclear cells were separated and stimulated in vitro with Leishmania antigens to test the lymphoproliferative responses (LPR). Before the combined immunochemotherapy, the LPR to leishmanial antigens was negligible (stimulation index - SI=1.4). After the first course of combined therapy it became positive (SI=4.17). The antigen responding cells were predominantly T-cells (47.5%) most of them with CD8+ phenotype (33%). Very low CD4+ cells (2.2%) percentages were detected. The increased T-cell responsiveness to leishmanial antigens after combined therapy was accompanied by interferon-g (IFN-g) production as observed in the cell culture supernatants. In this patient, healing of the leishmaniasis lesions was associated with the induction of a specific T-cell immune response, characterized by the production of IFN-g and the predominance of the CD8+ phenotype among the Leishmania-reactive T-cells.
Atypical Mucocutaneous Leishmaniasis Caused by Leishmania braziliensis in an Acquired Immunodeficiency Syndrome Patient: T-cell Responses and Remission of Lesions Associated with Antigen Immunotherapy
Da-Cruz, Alda M;Filgueiras, Danilo V;Coutinho, Ziadir;Mayrink, Wilson;Grimaldi Jr, Gabriel;De Luca, Paula M;Mendon?a, Sergio CF;Coutinho, Sergio G;
Memórias do Instituto Oswaldo Cruz , 1999, DOI: 10.1590/S0074-02761999000400020
Abstract: an atypical case of acquired immunodeficiency syndrome-associated mucocutaneous lesions due to leishmania braziliensis is described. many vacuolated macrophages laden with amastigote forms of the parasite were found in the lesions. leishmanin skin test and serology for leishmaniasis were both negative. the patient was resistant to therapy with conventional drugs (antimonial and amphotericin b). interestingly, remission of lesions was achieved after an alternative combined therapy of antimonial associated with immunotherapy (whole promastigote antigens). peripheral blood mononuclear cells were separated and stimulated in vitro with leishmania antigens to test the lymphoproliferative responses (lpr). before the combined immunochemotherapy, the lpr to leishmanial antigens was negligible (stimulation index - si=1.4). after the first course of combined therapy it became positive (si=4.17). the antigen responding cells were predominantly t-cells (47.5%) most of them with cd8+ phenotype (33%). very low cd4+ cells (2.2%) percentages were detected. the increased t-cell responsiveness to leishmanial antigens after combined therapy was accompanied by interferon-g (ifn-g) production as observed in the cell culture supernatants. in this patient, healing of the leishmaniasis lesions was associated with the induction of a specific t-cell immune response, characterized by the production of ifn-g and the predominance of the cd8+ phenotype among the leishmania-reactive t-cells.
Perceptual filling-in of stereoscopically presented targets
Couto, Márcia Furukawa;Pessoa, Valdir Filgueiras;
Arquivos Brasileiros de Oftalmologia , 2007, DOI: 10.1590/S0004-27492007000100018
Abstract: purpose: to investigate the influence of parametric variation on the filling-in latency of stereoscopically presented stimuli. methods: anaglyphs were created using two circular patches of 0.3o diameter, 0.5o disparity and 6o eccentricity from fixation point. targets were presented at the visual field midline, 90o and 270o positions, with crossed and uncrossed disparity. the time elapsed for disappearance of the target under voluntary steady fixation was computed. eighteen subjects tested. results: there was no significant difference between crossed and uncrossed disparities, nor between near or far from the vertical horopter line. the significant difference was between upper and lower visual field positions. conclusion: the results show that: (i) stereoscopic presentation does not influence the target filling-in latency; (ii) differences between dorsal and ventral visual stream might influence target filling-in latency.
O discurso da sustentabilidade e as práticas de re-ordenamento do espa o na Grande Vitória/ES
Camilla Lobino,Igor Vitorino,Márcio Filgueiras
Geografares , 2008,
Abstract: Este artigo discute alguns dos pressupostos e implica es dos usos da no o de “ s u s t e n t a b i l i d a d e ” n a s p r á t i c a s d e ordenamento do espa o urbano da regi o metropolitana da Grande Vitória. A partir do estudo de três casos- em Vitória, Vila Velha e em Cariacica- buscamos entender como os atuais projetos de cidade, ancorados nas representa es de uma “cidade sustentável”, implicam numa ressignifica o e/ou descolamento das práticas sociais locais, vistas como empecilhos a tais projetos urbanos.
Problemas de sono-vigília em crian?as: um estudo da prevalência
Klein, John M.;Gon?alves, Alda;
Psico-USF , 2008, DOI: 10.1590/S1413-82712008000100007
Abstract: recent studies demonstrated that sleep disturbances are among the most common complaints throughout childhood. changes in the sleep patterns have negative effects in the neuropsychological functioning, who affects the children's mental well being. the present paper aims to evaluate the sleep habits and estimate the prevalence of sleep disturbances in the portuguese school-aged children of two regions: faro and braga. a total of 938 elementary school students, of which 485 were girls (52%), aged between 7 and 11 years (m=8,74 ± sd=0,989) were used for this study. the results indicate that 56,4% of the children's sleeps more than 9 hors during the night and; 18,6% has sleep disturbances. the results will be discussed regarding the linkage between the presence of sleep psychopathology in infancy and the development of psychopathology in adulthood. further the importance of this questionnaire for sleep related problems studies so as the epidemiological data gathered with it will be discussed in terms of their relevance for research and clinical practice in portugal, in order to acknowledge the clinicians and educational agents for such problems.
Estanilenos: organometálicos de estanho (II) σ - ligados a grupos organicos
Lima, Geraldo M. de;Filgueiras, Carlos A. L.;
Química Nova , 2010, DOI: 10.1590/S0100-40422010001000035
Abstract: this article provides a short review of the chemistry of stannylenes and their derivatives, including the preparation, spectroscopic properties, molecular structure and reactivity of the various species. the organometallic chemistry of sn(ii) is far less explored than that of its much more common sn(iv) counterpart. organometallics of main group metals have become increasingly important in recent years, which prompted us to present an overview of the situation regarding the case of sn(ii).
On Aharonov-Casher bound states
E. O. Silva,F. M. Andrade,H. Belich,C. Filgueiras
Physics , 2012, DOI: 10.1140/epjc/s10052-013-2402-1
Abstract: In this work bound states for the Aharonov-Casher problem are considered. According to Hagen's work on the exact equivalence between spin-1/2 Aharonov-Bohm and Aharonov-Casher effects, is known that the $\boldsymbol{\nabla}\cdot\mathbf{E}$ term cannot be neglected in the Hamiltonian if the spin of particle is considered. This term leads to the existence of a singular potential at the origin. By modeling the problem by boundary conditions at the origin which arises by the self-adjoint extension of the Hamiltonian, we derive for the first time an expression for the bound state energy of the Aharonov-Casher problem. As an application, we consider the Aharonov-Casher plus a two-dimensional harmonic oscillator. We derive the expression for the harmonic oscillator energies and compare it with the expression obtained in the case without singularity. At the end, an approach for determination of the self-adjoint extension parameter is given. In our approach, the parameter is obtained essentially in terms of physics of the problem.
Nonrelativistic quantum dynamics on a cone with and without a constraining potential
C. Filgueiras,E. O. Silva,F. M. Andrade
Mathematics , 2012, DOI: 10.1063/1.4770048
Abstract: In this paper we investigate the bound state problem of nonrelativistic quantum particles on a conical surface. This kind of surface appears as a topological defect in ordinary semiconductors as well as in graphene sheets. Specifically, we compare and discuss the results stemming from two different approaches. In the first one, it is assumed that the charge carriers are bound to the surface by a constraining potential, while the second one is based on the Klein-Gordon type equation on surfaces, without the constraining potential. The main difference between both theories is the presence/absence of a potential which contains the mean curvature of a given surface. This fact changes the dependence of the bound states on the angular momentum $l$. Moreover, there are bound states that are absent in the Klein-Gordon theory, which instead appear in the Schr\"{o}dinger one.
Pitting corrosion resistance of coloured oxide films grown on stainless steel in sulphuric acid in the presence and absence of chromic acid
Vasconcelos, Karina O.;Bocchi, Nerilso;Sim?es, Alda M.;
Journal of the Brazilian Chemical Society , 2010, DOI: 10.1590/S0103-50532010000300011
Abstract: in this work, pitting corrosion resistance of coloured oxides films grown on aisi-304 stainless-steel in h2so4 and h2so4 + cro3 was evaluated. surface morphology and topography of the films were examined by sem (scanning electron microscopy) and afm (atomic force microscopy), respectively. electrochemical characterizations were conducted by polarization curves and impedance measurements in borate buffer ph 9.2. the pitting corrosion was evaluated by polarization curves carried out in the same solution containing nacl. all coloured films presented similar values of epit, but they were higher than those for non-coloured ones. the values of (epit - ecor) were in the range of 0.45-0.57 v, 0.78-0.92 v and 0.98-1.12 v for native films and films grown in the presence and absence of chromic acid, respectively. therefore, the films grown on stainless steel in the absence of chromic acid presented the highest potential range free of pitting corrosion.
The Rutter Children Behaviour Questionnaire for teachers: from psychometrics to norms, estimating caseness
Klein, John M.;Gon?alves, Alda;Silva, Carlos F.;
Psico-USF , 2009, DOI: 10.1590/S1413-82712009000200004
Abstract: to establish the psychometric properties of the rcbq for completion by teachers and to determine behavioural and emotional problems in young children, as they occur in the classroom, we asked 45 elementary school teachers of the north of portugal to rate classroom behaviour of their pupils based on rutter children's behaviour questionnaire for teachers. a total of 970 portuguese mid class children (530 girls and 440 boys) aged between 8 to 11 years (m=8.47; sd=.771) were evaluated. a two factor structure was found to be suitable, exhibiting an acceptable reliability and test-retest values along a 3-month period. an average of 16.1% of the pupils exhibited some behavioural problems, where teachers described anxiety (3.1%), worry (5.1%) and unconcentration (14.1%) as the most prevalent symptoms. the findings suggest that the translated scale could serve as a rapid and useful screening instrument in clinical and in research settings.
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