4f 4f Intensities
Mostrando 1-12 de 56 artigos, teses e dissertações.
-
1. Effect of iontophoresis on fluoride uptake in enamel with artificial caries lesion
Abstract: Iontophoresis is a noninvasive technique, based on the application of a constant low-intensity electric current to facilitate the release of a variety of drugs, whether ionized or not, through biological membranes. The objective of this research was to evaluate the effect of iontophoresis using different electric current intensities on the uptake o
Braz. oral res.. Publicado em: 16/05/2019
-
2. Ultra-short-term heart rate variability during resistance exercise in the elderly
Despite the appeal of ultra-short-term heart rate variability (HRV) methods of analysis applied in the clinical and research settings, the number of studies that have investigated HRV by analyzing R-R interval (RRi) recordings shorter than 5 min is still limited. Moreover, ultra-short-term HRV analysis has not been extensively validated during exercise and,
Braz J Med Biol Res. Publicado em: 21/05/2018
-
3. ÓXIDO DE ÍTRIO E ALUMÍNIO DOPADO COM Yb3+ E Er3+ INCORPORADO EM MEMBRANA DE POLIAMIDA
Lanthanide ions have special light emission, which can occur through descending and ascending energy conversion. Ascending energy conversion is especially interesting for bioapplications because excitation in the infrared region does not excite biomolecules and therefore does not interfere in detection, not to mention that it penetrates deeper in the skin. H
Quím. Nova. Publicado em: 2018-05
-
4. Cerebral vasomotor reactivity assessment using Transcranial Doppler and MRI with apnea test
Differently from previous studies that used Transcranial Doppler (TCD) and functional MRI (fMRI) for cerebral vasomotor reactivity (CVR) assessment in patients with carotid stenosis (CS), we assessed CVR using an identical stimulus, the Breath-Holding Test (BHT). We included 15 patients with CS and 7 age-matched controls to verify whether fMRI responded diff
Braz J Med Biol Res. Publicado em: 24/10/2016
-
5. Acute effects of Expiratory Positive Airway Pressure (EPAP) on different levels in ventilation and electrical activity of sternocleidomastoid and parasternal muscles in Chronic Obstructive Pulmonary Disease (COPD) patients: a randomized controlled trial
ABSTRACT Objective To investigate the acute effects of EPAP on the activity of sternocleidomastoid (SCM), parasternal muscles and ventilatory parameters in COPD patients. Method Twenty-four patients with COPD were studied using surface electromyography (sEMG) and a ventilometer. Patients were randomly assigned to EPAP 10 cmH2O-EPAP10 or 15 cmH2O-EPAP15 for
Braz. J. Phys. Ther.. Publicado em: 22/09/2016
-
6. Oxygen uptake, respiratory exchange ratio, or total distance: a comparison of methods to equalize exercise volume in Wistar rats
This study compared strategies to equalize the volume of aerobic exercise performed with different intensities by Wistar rats, based on the distance covered during exercise bouts and energy expenditure (EE, isocaloric sessions) obtained from oxygen uptake (V̇O2) or respiratory exchange ratio (RER). Thirty-three male rats (270.5±12.8 g) underwent maximal ex
Braz J Med Biol Res. Publicado em: 28/07/2016
-
7. Intensity of swimming exercise influences aortic reactivity in rats
Exercise is known to cause a vasodilatory response; however, the correlation between the vasorelaxant response and different training intensities has not been investigated. Therefore, this study evaluated the vascular reactivity and lipid peroxidation after different intensities of swimming exercise in rats. Male Wistar rats (aged 8 weeks; 250-300 g) underwe
Braz J Med Biol Res. Publicado em: 18/09/2015
-
8. Optical characterization of europium-doped indium hydroxide nanocubes obtained by Microwave-Assisted Hydrothermal method
Crystalline europium-doped indium hydroxide (In(OH)3:Eu) nanostructures were prepared by rapid and efficient Microwave-Assisted Hydrothermal (MAH) method. Nanostructures were obtained at low temperature. FE-SEM images confirm that these samples are composed of 3D nanostructures. XRD, optical diffuse reflectance and photoluminescence (PL) measurements were us
Mat. Res.. Publicado em: 13/06/2014
-
9. Acute effects of different inspiratory resistive loading on heart rate variability in healthy elderly patients
BACKGROUND: The cardiovascular system is noticeably affected by respiration. However, whether different inspiratory resistive loading intensities can influence autonomic heart rate (HR) modulation remains unclear. OBJECTIVE: The objective was to investigate HR modulation at three different inspiratory resistive loading intensities in healthy elderly men.
Braz. J. Phys. Ther.. Publicado em: 23/08/2013
-
10. CONTRIBUIÇÃO AO ESTUDO DE CAMPO CRISTALINO E TRANSIÇÕES 4f-4f EM SISTEMAS CONTENDO LANTANÍDEOS. / CONTRIBUTION TO THE STUDY OF CRYSTAL AND FIELD 4F-4F TRANSITIONS IN SYSTEMS CONTAINING LANTHANIDES.
A theoretical study of the interactions between the 4f electrons in lanthanide ions (Ln3 +) with the chemical environment was made using crystal field theory. The main effects were studied: change in position of the berycentre of the energy levels of the free ion, maximum splitting of the J level and contribution to 5D0-7F0 transition of Eu3+ ion. Use of sec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/09/2012
-
11. Variabilidade e divergência genética em cruzamentos dialélicos de soja / Variability and genetic divergence in soybean diallel crosses
Estimates of genetic divergence (DG) have not been used for parental selection in breeding programs, because of the inconsistence of the results. The objective of this study was to evaluate the possibility of predicting the genetic variability (VG) of soybean populations derived from two-way crosses, using DG data from AFLP markers (Bonato et al., 2006), and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
-
12. Análise conformacional e das interações eletrônicas de algumas N-metóxi-N-metil-acetamidas-α-heterossubstituídas / Conformational analysis and electronic interactions of some N-methoxy-N-methyamides α-heterossubstituted
This thesis deals with the synthesis and conformational analysis of some α-heterosubstituted N-methoxy-N-methyl-amides (Weinreb amides) Z-C(O)-N(OMe)Me (Z= CH2F (1), CH2OMe (2), CH2OPh (3), CH2Cl (4), CH2Br (5), CH2SEt (6) and Me2CSEt (7). The analysis of the carbonyl band in the IR spectra supported by B3LYP/6 311++G(3df, 3pd calculations along with th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011