Luis Felipe das Chagas e Silva de Carvalho

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Magnetic resonance is used to investigate biodistribution aspects of dextran-coated magnetite nanoparticles (9.4 nm core diameter) in both liver and spleen from 5 minutes up to 6 months after intravenous administration of a magnetic fluid sample in female Swiss mice. Using magnetic resonance data important parameters such as the absorption half-life (t 1/2(More)
The objective of the present study was to assess the effectiveness of a combined protocol of muscle stretching and strengthening after immobilization of the hindlimb. Thirty female Wistar rats were divided into 6 groups: group immobilized for 14 days to cause full plantar flexion by cast (GI, n = 6); group immobilized/stretched (GIS, n = 6): submitted to(More)
The Valsalva maneuver is an autonomic test that evokes short sharp cardiovascular fluctuations mediated by the autonomic nervous system. Numerous spectral analysis methods have been proposed to analyze biological signals. When applied to heart rate (HR) variability, two major bands related to autonomic influence have been defined: LF (mainly sympathetic)(More)
The heart rate and blood pressure power spectrum, especially the power of the low frequency (LF) and high frequency (HF) components, have been widely used in the last decades for quantification of both autonomic function and respiratory activity. Discrete Wavelet Transform (DWT) is an important tool in this field. The paper presents a LF and HF fast(More)
Raman spectroscopy can provide a molecular-level fingerprint of the biochemical composition and structure of cells with excellent spatial resolution and could be useful to monitor changes in composition for dysplasia and early, non-invasive cancer diagnosis (carcinoma in situ), both ex-vivo and in vivo. In this study, we demonstrate this potential by(More)
The use of medicines during pregnancy deserves special attention from dentists due to the potential risks to fetal development. The prescription of antimicrobial drugs during this period must be based not only on the etiology of the disease but also on the drug's effect on the embryo, which may be toxic, possibly leading to irreversible lesions. Interest in(More)
BACKGROUND The disorder of reflex and motor function in patients affected by stroke causes negative impact on the performance of movement patterns and affects the functional activities. OBJECTIVES To investigate the immediate effects of transcutaneous electrical nerve stimulation (TENS) and cryotherapy interventions on the spinal reflex excitability and(More)
OBJECTIVES The Bezold-Jarisch reflex involves a marked increase in vagal (parasympathetic) efferent discharge to the heart. During micturition, there is a marked increase in parasympathetic activity to the bladder (pelvic nerve activity) and this coincides with periods of phasic bladder contractions. In recent studies, we have shown that regions of the CNS(More)
1 XXXXXXXXXX 1 Immediate effects of TENS and cryotherapy in the reflex excitability and voluntary activity in hemiparetic subjects: a randomized crossover trial Efeitos imediatos da TENS e crioterapia na excitabilidade reflexa e atividade Abstract Background: The disorder of reflex and motor function in patients affected by stroke causes negative impact on(More)
The present work presents a density-functional microscopic model of soft biological tissue. The model was based on a prototype molecular structure from experimentally resolved collagen peptide residues and water clusters and has the objective to capture some well-known experimental features of soft tissues. It was obtained the optimized geometry, binding(More)