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Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. Retificador trifásico com elevado fator de potência. / Three-phase rectifier with high power factor.
Este trabalho trata da retificação trifásica com elevado fator de potência. São mostradas algumas soluções encontradas na literatura. Dentre elas, optou-se pela utilização de um conversor trifásico autocomutado do tipo fonte de tensão (VSC), operando em modulação em largura de pulso (PWM). Apresenta-se a modelagem do conversor, que é utilizado
Publicado em: 2004
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26. Efeito de um limpador de protese na concentração de compostos sulfurados volateis e na microbiota bucal de pacientes idosos institucionalizados portadores de proteses totais
The purpose of this study was to determine the effectiveness of the Polident 5 minutes@ (Block and Drug Corp.) denture cleanser in reducing V olatile Sulphur Compounds (VSC) concentration, estimated by Halimeter@ (Interscan Corp.) and the bactericide action by Blood Ágar and MacConkey culture, besides evaluating the correlation among the denture cleaning de
Publicado em: 2003
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27. Evaluation of oral and nasal odor in patients with and without cleft lip and/or palate / Avaliação dos parâmetros de halitose bucal e nasal em pacientes com e sem fissura de lábio e/ou palato
The aim of this study was to investigate the relationship between the parameters of halitosis in patients with cleft lip and/or palate and post-graduation students of the Bauru Dental School (FOB) University of Sao Paulo, taking into account the presence of tongue coating, classified according to its dry weight, salivary flow rate, BANATM test and Halimet
Publicado em: 2003
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28. Experimental study applied to an industrial robot by using variable structure controllers and friction compensation
Control of an industrial robot is mainly a problem of dynamics. It includes non-linearities, uncertainties and external perturbations that should be considered in the design of control laws. In this work, two control strategies based on variable structure controllers (VSC) and a PD control algorithm are compared in relation to the tracking errors considering
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-11
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29. Avaliação da relação entre estresse e a concentração de compostos sulfurados volateis no halito bucal
The aim of study was to evaluate the relationship between stress and volatile sulfur compounds (VSC) present in mouth air. Thus, two stressfull conditions were evaluated: Study 1- examination; Study II - premenstrual syndrome (PMS). Study I was composed of 2 groups: A and B. Group A (34 volunteers), was divided in 18 volunteers with stress and 16 volunteers
Publicado em: 1999
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30. Modified Vaccinia Virus Ankara Immunization Protects against Lethal Challenge with Recombinant Vaccinia Virus Expressing Murine Interleukin-4
Recent events have raised concern over the use of pathogens, including variola virus, as biological weapons. Vaccination with Dryvax is associated with serious side effects and is contraindicated for many people, and the development of a safer effective smallpox vaccine is necessary. We evaluated an attenuated vaccinia virus, modified vaccinia virus Ankara (
American Society for Microbiology.
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31. Analysis of the role of the Spitzenkörper in fungal morphogenesis by computer simulation of apical branching in Aspergillus niger
High-resolution video microscopy, image analysis, and computer simulation were used to study the role of the Spitzenkörper (Spk) in apical branching of ramosa-1, a temperature-sensitive mutant of Aspergillus niger. A shift to the restrictive temperature led to a cytoplasmic contraction that destabilized the Spk, causing its disappearance. After a short tran
The National Academy of Sciences of the USA.
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32. Expression of calbindin-D28K in motoneuron hybrid cells after retroviral infection with calbindin-D28K cDNA prevents amyotrophic lateral sclerosis IgG-mediated cytotoxicity.
Calbindin-D28K and/or parvalbumin appear to influence the selective vulnerability of motoneurons in amyotrophic lateral sclerosis (ALS). Their immunoreactivity is undetectable in motoneurons readily damaged in human ALS, and in differentiated motoneuron hybrid cells [ventral spinal cord (VSC 4.1 cells)] that undergo calcium-dependent apoptotic cell death in
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33. Expression of secreted platelet-derived growth factor-B by recombinant nonreplicating and noncytopathic vaccina virus.
OBJECTIVE: The purpose of this study was to develop a noncytopathic vector for transient delivery of biologically active platelet-derived growth factor (PDGF) to wounds. BACKGROUND: Topical application of the protein PDGF-B has improved wound healing in experimental studies of healing-impaired wounds. However, use of PDGF-B has been limited by availability o
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34. Cytotoxicity of immunoglobulins from amyotrophic lateral sclerosis patients on a hybrid motoneuron cell line.
Patients with amyotrophic lateral sclerosis possess antibodies (ALS IgGs) that bind to L-type skeletal muscle voltage-gated calcium channels (VGCCs) and inhibit L-type calcium current. To determine whether interaction of ALS IgGs with neuronal VGCCs might influence motoneuron survival, we used a motoneuron-neuroblastoma hybrid (VSC 4.1) cell line expressing
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35. Identification and Functional Analysis of the Gene Encoding Methionine-γ-Lyase in Brevibacterium linens
The enzymatic degradation of l-methionine and subsequent formation of volatile sulfur compounds (VSCs) is believed to be essential for flavor development in cheese. l-Methionine-γ-lyase (MGL) can convert l-methionine to methanethiol (MTL), α-ketobutyrate, and ammonia. The mgl gene encoding MGL was cloned from the type strain Brevibacterium linens ATCC 9175
American Society for Microbiology.