Correlation On Frequency Bands
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Postural Control in Relapsing-Remitting Multiple Sclerosis
Abstract Introduction Postural instability is considered one of the most disabling symptoms of relapsing-remitting multiple sclerosis (RRMS). Objective To evaluate postural control in patients with RRMS. Method A total of 79 individuals between 18 and 65 years old, of both genders, were distributed into an experimental group composed of patients with RRMS
International Archives of Otorhinolaryngology. Publicado em: 2022
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2. Linear and nonlinear analysis of heart rate variability in healthy subjects and after acute myocardial infarction in patients
The objectives of this study were to evaluate and compare the use of linear and nonlinear methods for analysis of heart rate variability (HRV) in healthy subjects and in patients after acute myocardial infarction (AMI). Heart rate (HR) was recorded for 15 min in the supine position in 10 patients with AMI taking β-blockers (aged 57 ± 9 years) and in 11 hea
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-05
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3. Relationship between money and inflation in Brazil A filter based approach / Relação entre moeda e inflação no Brasil uma abordagem baseada em filtros
O objetivo deste trabalho é verificar a relação entre moeda e inflação no Brasil, utilizando uma abordagem baseada em filtros de banda de passagem, especificamente o filtro definido por Christiano e Fitzgerald em seu trabalho de 2003. Os dados utilizados foram as taxas de crescimento dos agregados monetários (segundo a definição oficial do Banco Cent
Publicado em: 2009
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4. Optical detection system of partial discharges on insulator strings of high voltage transmission lines / Sistema de detecÃÃo Ãptica de descargas parciais em cadeias de isoladores de linhas de transmissÃo de alta tensÃo
Leakage current monitoring is frequently used to evaluate the degradation in the insulation capacity of insulator strings of overhead transmission lines, due to pollution. The pollutants accumulation over the surface of the insulators strings, together with humidity, lead to an increase in the current leak over the insulatorâs surface, in turn producing the
Publicado em: 2008
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5. Topographic aspects of photic driving in the electroencephalogram of children and adolescents
The electroencephalogram amplitude spectra at 11 fixed frequencies of intermittent photic stimulation of 3 to 24 Hz were combined into driving "profiles" for 14 scalp points in 8 male and 7 female normal subjects aged 9 to 17 years. The driving response varied over frequency and was detected in 70 to 100% of cases in the occipital areas (maximum) and in 27 t
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-06
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6. Agreement with the disulfide stretching frequency-conformation correlation of Sugeta, Go, and Miyazawa.
Two hypotheses have been advanced to explain the conformational dependence of the disulfide stretching frequency of the CCSSCC moiety in unstrained disulfides. Such compounds can adopt conformations that exhibit disulfide stretching bands near 510, 525, and 540 cm-1. Sugeta et al. [Sugeta, H., Go, A. & Miyazawa, T. (1973) Bull. Chem. Soc. Jpn. 46, 3407-3411]
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7. Disulfide Bond Dihedral Angles from Raman Spectroscopy
Raman spectra of several compounds containing the CS-SC moiety were obtained (in the solid phase) from 450-800 cm-1 to investigate the S-S and C-S stretching behavior. The S-S stretching frequency varied linearly with the CS-SC dihedral angle (obtained from either x-ray or neutron diffraction or ultraviolet absorption) for compounds whose CC-SS dihedral angl
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8. Electroencephalographic signatures of attentional and cognitive default modes in spontaneous brain activity fluctuations at rest
We assessed the relation between hemodynamic and electrical indices of brain function by performing simultaneous functional MRI (fMRI) and electroencephalography (EEG) in awake subjects at rest with eyes closed. Spontaneous power fluctuations of electrical rhythms were determined for multiple discrete frequency bands, and associated fMRI signal modulations w
National Academy of Sciences.
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9. The Effect of Adenosine 5′-Triphosphate on the Shibata Shift and on Associated Structural Changes in the Conformation of the Prolamellar Body in Isolated Maize Etioplasts 1
Isolated maize (Zea mays var. kelvedon glory) etioplasts have been used to investigate the relationships between the spectral shifts and ultrastructural changes which occur during light-induced chloroplast development. After primary photoconversion, the Shibata shift was observed as a change from 680 to 670 nm in the chlorophyllide absorption maximum. When 1
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10. Ligand binding to heme proteins: III. FTIR studies of His-E7 and Val-E11 mutants of carbonmonoxymyoglobin.
Fouier-transform infrared (FTIR) difference spectra of several His-E7 and Val-E11 mutants of sperm whale carbonmonoxymyoglobin were obtained by photodissociation at cryogenic temperatures. The IR absorption of the CO ligand shows characteristic features for each of the mutants, both in the ligand-bound (A) state and in the photodissociated (B) state. For mos
The Biophysical Society.
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11. Correlation between antibiotic resistance, phage-like particle presence, and virulence in Rhodococcus equi human isolates.
Rhodococcus equi is a gram-positive coccobacillus that appears to be emerging as a pulmonary pathogen in AIDS patients. In four human clinical isolates, two antibiotic resistance phenotypes were found to coexist: one beta-lactam resistant and the other beta-lactam susceptible. In vitro, beta-lactam-resistant mutants were obtained at a frequency of 1 x 10(-5)