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Search Results: 1 - 10 of 157710 matches for " B.; Couto Ribeiro "
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Anisotropy in Rupture Lines of Paper Sheets
I. L. Menezes-Sobrinho,M. S. Couto,I. R. B. Ribeiro
Physics , 2005, DOI: 10.1103/PhysRevE.71.066121
Abstract: We have experimentally investigated the fracture process in paper samples submitted to a uniaxial force. Five types of paper sheets (newsprint, towel, sulfite, silk and couche papers) were fractured along two orthogonal orientations. In order to characterize the rupture lines of the paper sheets we utilized the Hurst exponent. Our results indicate a dependence of the Hurst exponent on the orientation of the paper sheets for samples of newsprint and, probably, towel and silk papers. For the other types of paper the Hurst exponent does not depend on the direction of crack propagation.
Reinstatement of Morphine-Induced Conditioned Place Preference in Mice by Priming Injections
B. Ribeiro Do Couto,M. A. Aguilar,C. Manzanedo,M. Rodríguez-Arias,J. Mi arro
Neural Plasticity , 2003, DOI: 10.1155/np.2003.279
Abstract: To construct a model of relapse of drug abuse in mice, the induction, we evaluated the extinction and reinstatement of morphine-induced place preference. In Experiment 1, we examined the effects of morphine (0, 2, 3, 5, 10, 20 and 40 mg/kg) in the conditioned place preference (CPP) paradigm. Mice showed CPP with 5, 10, 20 and 40 mg/kg. In Experiment 2, we evaluated the effects of two different extinction procedures. After conditioning with 40 mg/kg of morphine, the mice underwent daily extinction sessions of 60 or 15 min of duration. CPP was extinguished after seven and nine sessions, respectively. In Experiment 3, we tested the reinstating effects of several priming doses of morphine. Mice were conditioned with 40 mg/kg of morphine and underwent the daily 15 min extinction sessions until CPP was no longer evident. Then, the effects of morphine (0, 2, 3, 5, 10, 20, 40 mg/kg, i.p.) were evaluated. CPP was reinstated by doses from 5 mg/kg upward. The results show that morphine priming injections are effective in reactivating opiateseeking behavior in mice, and thus, the CPP paradigm might be useful to investigate the mechanisms underlying relapse of drug abuse.
Implicaciones del proceso de acreditación para los pacientes desde la perspectiva de los profesionales de enfermería
Figueiredo Manzo,B.; Couto Ribeiro,H.C.T.; Menezes Brito,M.J.; Alves,M.; Bauer Feldman,L.;
Enfermería Global , 2012, DOI: 10.4321/S1695-61412012000100016
Abstract: the study aimed to understand the implications of the accreditation process for patients from the perspective of nursing professionals. it is a qualitative study conducted in a mid-sized private hospital in belo horizonte, brazil. a total of 24 professionals, 9 nurses and 15 nursing technicians took part in the study. data were collected through interviews with semi-structured guide and analyzed with the support of content analysis. the results showed that the accreditation process provides a care for patients with excellence, with standardization of techniques and support for scientific care by directing actions and health practices that are performed safely. on the other hand the subjects reported the lack of knowledge of the patients of the importance of accreditation as well as the fact that there is a distance between the professionals and patients, due to the bureaucratic aspects of the accreditation process and time limitation for dialogue and interaction. thus, in view of the research subjects, the hospital accreditation means better conditions in patient care, including care with excellence, but impairs the patient-professional contact, due to high demand and bureaucracy in the process.
Electromyographic activity during maximal isometric contraction combined with local sinusoidal vibration
Jacielle C. Ferreira, Bruno M. L. Resende, Jo o B. Soldati, Jr., Jo o G. de Oliveira Claudino, Rafael S. Ribeiro, Bruno P. Couto, Leszek A. Szmuchrowski, Prof.
Biomedical Human Kinetics , 2011, DOI: 10.2478/v10101-011-0008-3
Abstract: Study aim: To compare the electromyographic activity during maximal isometric contraction alone or combined with local sinusoidal vibration. Material and methods: A group of 6 men aged 23 - 29 years performed 3 maximal voluntary contractions of the dominant elbow flexors lasting 10 s each and separated by 5-min intermissions. One repetition was without vibration, one was associated with 15-Hz and the other one with 20-Hz vibrations of 5-mm amplitude, the sequence of repetitions being random. A new system to generate local vibration was applied, the parameters of the vibratory stimulus being measured using an accelerometer. Force and EMG activity were also measured. The subjects performed the task in sitting position in a Scott Bench-type device. Results: Mean acceleration RMS significantly (p<0.01) differed between vibration frequencies for the X, Y, Z-axes. No significant differences were found, however, for EMG RMS. Vibration frequencies coincided with the machine-predicted ones; acceleration frequencies around 5 Hz were present in all situations, even without vibration, most likely brought about by tremor. Conclusion: The local vibration applied was not enough to generate different responses in EMG activity. The features of vibratory stimulus confirmed the expected frequency range and revealed frequencies around 5 Hz, that could be attributed to muscle tremor.
Hemorragia digestiva alta associada ao consumo de ácido acetilsalicílico e de anti-inflamatórios n?o-esteróides em Portugal Resultados do estudo PARAINES
Couto,Gilberto; Macedo,Guilherme; Ribeiro,Filipe;
Jornal Português de Gastrenterologia , 2010,
Abstract: introduction: acetylsalicylic acid (asa) and non-steroidal anti-inflammatory drugs (nsaids) are amongst the most prescribed drugs in the world and may lead to peptic ulcer related bleeding and death. patients and methods: paraines study was a multicentre and retrospective study whose objective was to characterize the magnitude and management of asa/nsaids related upper gastrointestinal bleeding in portugal (9 centres; referral population 2.5 million) in 2006. results: we report 291 hospitalizations for 280 patients (estimated incidence 145.5/100000 asa/nsaids consumers/year). two thirds were male; 68.7% were older than 65 years and 24.1% had a previous history of peptic ulcer. low-dose asa was the most prescribed drug. fifteen per cent of the patients with gastrointestinal risk were taking a proton pump inhibitor for gastric protection. 237 peptic ulcers were diagnosed, 51% with endoscopic high-risk stigmata, usually treated with dual injection therapy (77.2%) and iv proton pump inhibitors (33% high dose continuous infusion). ten patients died during hospitalization (3.6%; estimated incidence 5/100000 asa/nsaids consumers/year). conclusions: hospitalization and in-hospital mortality incidence of asa/nsaids related upper gastrointestinal bleeding in portugal were lower than expected; only a few patients with associated risk factors are actually on proton pump inhibitors prophylaxis; peptic ulcer bleeding treatment may be further optimized.
Pesquisa em enfermagem: fatores implicados na categoriza??o de dados
Chianca, Tania Couto Machado;Garcia, Telma Ribeiro;
Revista Latino-Americana de Enfermagem , 1996, DOI: 10.1590/S0104-11691996000700016
Abstract: in this study we aimed at training a nurse to apply communication techniques in order to become more therapeutic in her successive interpersonal relations. along the research we found categorization problems that were considered and analyzed.
Hemorragia digestiva alta associada ao consumo de ácido acetilsalicílico e de anti-inflamatórios n o-esteróides em Portugal Resultados do estudo PARAINES Upper gastrointestinal bleeding associated with acetylsalicylic acid and non-steroidal antiinflammatory drugs in Portugal Results from PARAINES study
Gilberto Couto,Guilherme Macedo,Filipe Ribeiro
Jornal Português de Gastrenterologia , 2010,
Abstract: INTRODU O: O ácido acetilsalicílico (AAS) e os anti-inflamatórios n o esteróides (AINE) s o dos fármacos mais prescritos em todo o mundo e associam-se a um elevado risco de hemorragia digestiva alta por úlcera péptica e morte. MATERIAL E MéTODOS: O estudo PARAINES, retrospectivo e multicêntrico, avaliou a express o e consequências da hemorragia digestiva alta associada ao consumo de AAS/AINE, e sua abordagem, no nosso país (9 centros, popula o de referência: 2,5 milh es), durante o ano de 2006. RESULTADOS: Ocorreram 291 admiss es relativas a 280 doentes (incidência estimada: 145,5/100 000 consumidores de AAS/AINE/ano). Dois ter os dos doentes eram do sexo masculino; 68,7% tinha mais de 65 anos e 24,1% tinha história prévia de úlcera péptica. O fármaco mais consumido foi o AAS (em baixa dose). Quinze por cento dos doentes de risco dizia fazer protec o gástrica com inibidores da bomba de prot es. Fez-se o diagnóstico de úlcera péptica em 237 casos; 51% tinham estigmas endoscópicos de alto risco e foram tratados com terapêutica injectável dupla (77,2%) e inibidores da bomba de prot es IV (33% altas doses, perfus o contínua). Faleceram 10 doentes no hospital (3,6%; incidência estimada: 5/100 000 consumidores de AAS/AINE/ano). CONCLUS ES: As incidências de internamento e de mortalidade por hemorragia digestiva alta associada ao consumo de AAS/AINE em Portugal s o inferiores às relatadas noutras séries; s o poucos os doentes de risco que fazem protec o gástrica; e existe algum espa o para optimizar a terapêutica da hemorragia digestiva alta por úlcera péptica de acordo com a evidência e recomenda es actuais. INTRODUCTION: Acetylsalicylic acid (ASA) and non-steroidal anti-inflammatory drugs (NSAIDs) are amongst the most prescribed drugs in the world and may lead to peptic ulcer related bleeding and death. PATIENTS AND METHODS: PARAINES study was a multicentre and retrospective study whose objective was to characterize the magnitude and management of ASA/NSAIDs related upper gastrointestinal bleeding in Portugal (9 centres; referral population 2.5 million) in 2006. RESULTS: We report 291 hospitalizations for 280 patients (estimated incidence 145.5/100000 ASA/NSAIDs consumers/year). Two thirds were male; 68.7% were older than 65 years and 24.1% had a previous history of peptic ulcer. Low-dose ASA was the most prescribed drug. Fifteen per cent of the patients with gastrointestinal risk were taking a proton pump inhibitor for gastric protection. 237 peptic ulcers were diagnosed, 51% with endoscopic high-risk stigmata, usually treated with dual injection thera
AINEs e HDA em Portugal. Necessário insistir na gastro-protec o! NSAIDs and upper bleeding in Portugal. It is necessary to insist in gastroprotection!
Gilberto Couto,Guilherme Macedo,Filipe Ribeiro
Jornal Português de Gastrenterologia , 2010,
Abstract:
Effect of Thermal Fluctuations in the Resonance Fluorescence of a Three-Level System
H. Couto,L. A. Amarante Ribeiro
Physics , 2001,
Abstract: The effect of thermal fluctuations in the resonance fluorescence of a three-level system is studied. The damped three-level system is driven by two strong incident classical fields near resonances frequencies. The simulation of a thermal bath is obtained with a large system of harmonic oscillators that represent the normal modes of the thermal radiation field. The time evolution of the fluorescent light intensities are obtained solving by a iterative method the Heisenberg equations of motion in the integral form. The results show that the time development of the intensity of the fluorescence light is strongly affected by the interaction of the system with the thermal bath.
Human immunodeficiency virus type- 1 subtypes of infected patients in Espírito Santo, Brazil
Cabral, Valéria P;Cunha, Carla B;Magalhaes, Eneida FL;Pinto-Neto, Lauro F;Couto-Fernandez, José Carlos;Dietze, Reynaldo;Morgado, Mariza G;Ribeiro-Rodrigues, Rodrigo;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000800010
Abstract: genetic variability of human immunodeficiency virus type - 1(hiv-1) is a potential threat for both diagnosis and treatment of hiv/aids, as well as the development of effective vaccines. up to now, hiv subtypes circulating among hiv-positive patients in the state of espírito santo were not known. in the present study, blood samples from 100 therapy-na?ve hiv-1 infected patients were collected and the hiv subtype was determined through the heteroduplex mobility assay (hma). ninety-seven out of 100 studied samples were subtyped by hma, 73 samples (75.2%) were from subtype b, 9 (9.3%) from subtype f, 3 (3.1%) from subtype c, 6 (6.2%) benv/fgag, and another 6 (6.2%) fenv/bgag, what suggests that recombinant viruses were present in the studied samples. twenty-eight percent of the subtype b samples were represented by the brazilian b" subtype, which were identified by rflp with fok i. data presented here demonstrate that the epidemiological characteristics of the hiv epidemic in the state of espírito santo are similar to those from the other southeastern states and helped to better understand the genetic polymorphism of hiv in brazil.
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