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Seriani Robson R Centro de Aquicultura, Instituto de Pesca, Avenida Francisco Matarazzo, 455, São Paulo, SP, 05001-900, Brazil, - - 2014
Fish bioassays are valuable tools that can be used to elucidate the toxicological potential of numerous substances that are present in the aquatic environment. In this study, we assessed the antagonistic action of selenium (Se) against the toxicity of mercury (Hg) in fish (Oreochromis niloticus). Six experimental groups with six ...
Schrauben Eric M EM Department of Medical Physics, University of Wisconsin, Madison, Wisconsin, - - 2014
To demonstrate a novel velocity sensitive acquisition and retrospective cardiorespiratory double-gated reconstruction scheme to examine respiratory effect on venous blood flow in healthy volunteers. Radial two dimensional (2D) phase contrast MR is performed at 3 Tesla in the internal jugular vein (IJV) of healthy volunteers (n = 6). Data are retrospectively partitioned ...
MartonĨíková Marcela M Institute of Neurobiology, Slovak Academy of Sciences, Šoltésovej 4, 040 01 Košice, Slovak Republic. - - 2014
New neurons are continuously being added to the olfactory bulb (OB) of adult rodents that are generated in the subventricular zone (SVZ), distant by a few millimeters. Neuronal precursors have to overcome this long distance without the radial-glial migratory scaffold, in contrast to migration mode during embryonic development. The previous ...
Tzeng Yu-Chieh YC University of Otago, Wellington - - 2014
Cerebral blood flow responses to transient blood pressure challenges are frequently attributed to cerebral autoregulation (CA) yet accumulating evidence indicates vascular properties like compliance are also influential. We hypothesized that middle cerebral blood velocity (MCAv) dynamics during or following a transient blood pressure perturbation can be accurately explained by the ...
Wang Xiaofei X a Sorbonne Universités , UPMC Univ Paris 6, UMR 7190, Institut Jean le Rond d'Alembert, Paris , - - 2014
A reliable and fast numerical scheme is crucial for the 1D simulation of blood flow in compliant vessels. In this paper, a 1D blood flow model is incorporated with a Kelvin-Voigt viscoelastic arterial wall. This leads to a nonlinear hyperbolic-parabolic system, which is then solved with four numerical schemes, namely: ...
Oren Liran L Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, - - 2014
During phonation, skewing of the glottal flow waveform (Q) refers to a phenomenon that occurs when the flow decelerates more rapidly than it accelerates. This skewing is clinically important because it increases the glottal efficiency, which is defined by the acoustic intensity (sound pressure level) divided by the subglottal pressure. ...
Felderhof B U BU Institut für Theorie der Statistischen Physik, RWTH Aachen University, Templergraben 55, 52056 Aachen, - - 2014
Swimming velocity and rate of dissipation of a sphere with surface distortions are discussed on the basis of the Stokes equations of low-Reynolds-number hydrodynamics. At first the surface distortions are assumed to cause an irrotational axisymmetric flow pattern. The efficiency of swimming is optimized within this class of flows. Subsequently, ...
Kunte Amit A Chemical Engineering Division, National Chemical Laboratory, Pune 411008, - - 2014
We show that the flow of granular material inside a two-dimensional flat bottomed hopper is altered significantly by having more than one exit orifice. For hoppers with small orifice widths, intermittent flow through one orifice enables the resumption of flow through the adjacent jammed orifice, thus displaying a sequence of ...
Meattey Dustin E DE Biodiversity Research Institute, 652 Main Street, Gorham, ME 04038, United States. Electronic address: - - 2014
In North America and Europe, sea ducks are important indicators of ecological health and inshore marine pollution. To explore spatial variation in mercury accumulation in common eiders in the northeastern United States, we compared concentrations of total mercury in common eider blood at several New England locations between 1998 and ...
De Kesel Pieter M M PM Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000, Ghent, - - 2014
Dried blood spot (DBS) sampling has gained wide interest in bioanalysis during the last decade and has already been successfully applied in pharmacokinetic and phenotyping studies. However, all of the available phenotyping studies used small datasets and did not include a systematic evaluation of DBS-specific parameters. The latter is important ...
Dubois Wil - - 2014
To measure the concentration of glucose in your blood, you put a strip in the meter, poke a hole in your finger to get a sample of blood, touch the tip of the test strip to the drop of blood, and wait for the result. It sounds pretty straightforward. But, ...
Wang Hsien-Yi - - 2014
Hemodialysis is the most common treatment for patients with end-stage renal disease. For hemodialysis, consistently functional vascular access must be surgically created with an anastomosis of artery and vein, referred to as an arteriovenous fistula (AVF). However, AVF dysfunction may occur over time. Angiography and Doppler ultrasound are usually used ...
Chan Aaron - - 2014
Recent hardware advances in optical coherence tomography (OCT) have led to ever higher A-scan rates. However, the estimation of blood flow axial velocities is limited by the presence and type of noise. Higher acquisition rates alone do not necessarily enable precise quantification of Doppler velocities, particularly if the estimator is ...
France Christopher R CR Department of Psychology, Ohio University, Athens, - - 2014
Evidence indicates that donor identity is an important predictor of donation behavior; however, prior studies have relied on diverse, unidimensional measures with limited psychometric support. The goals of this study were to examine the application of self-determination theory to blood donor motivations and to develop and validate a related multidimensional ...
Ong Frank F Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California, - - 2014
To investigate four-dimensional flow denoising using the divergence-free wavelet (DFW) transform and compare its performance with existing techniques. DFW is a vector-wavelet that provides a sparse representation of flow in a generally divergence-free field and can be used to enforce "soft" divergence-free conditions when discretization and partial voluming result in ...
Oren Liran L Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, Ohio - - 2014
Previous flow velocity measurements during phonation in canine larynges were done above the glottal exit. These studies found that vortical structures are present in the flow above the glottis at different phases of the glottal cycle. Some vortices were observed to leave the glottis during the closing phase and assumptions ...
Crimmins Eileen E a Davis School of Gerontology , University of Southern California , Los Angeles , California , - - 2014
Assessment of health in large population studies has increasingly incorporated measures of blood-based biomarkers based on the use of dried blood spots (DBS). The validity of DBS assessments made by labs used by large studies is addressed by comparing assay values from DBS collected using conditions similar to those used ...
Schudt Florian F Technische Hochschule Mittelhessen - University of Applied Sciences, Giessen, - - 2014
The respiratory flow is a good indicator of sleep-related breathing disorders. Common praxis is to use a pneumotachograph as the golden standard for flow measurement. However, it does not have to be necessarily the best possible test device for long-term condition, because the device is very uncomfortable and rarely suitable ...
Tuziuti Toru T National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan. Electronic address: - - 2013
We measured longitudinal speed of sound for matrix[poly(lactic acid)]-additive(clay particles) composite rectangular-solid specimen prepared by injection molding. It was found that the speed of sound measured in the direction along the longer side of the specimen was the highest at the middle of the specimen. This trend corresponded with that ...
Nozaki K - - 2013
The sibilant /s/ is produced by raising the tongue against the roof of the mouth to form a narrow constriction, which is adjusted so that the airstream emerging from it impinges on the incisors. However, the location where the sibilant sound occurs is unclear, as are the details of the ...
Reif Roberto R University of Washington, Department of Bioengineering, Seattle, WA 98195, - - 2013
In this work we determined the contributions of loud sound exposure (LSE) on cochlear blood flow (CoBF) in an in vivo anesthetized mouse model. A broadband noise system (20 kHz bandwidth) with an intensity of 119 dB SPL, was used for a period of one hour to produce a loud ...
Kniesburges Stefan - - 2013
Within the fully coupled multiphysics phonation process, the fluid flow plays an important role for sound production. This study addresses phenomena in the flow downstream of synthetic self-oscillating vocal folds. An experimental setup consisting of devices for producing and conditioning the flow including the main test channel was applied. The ...
Timmerman Philip - - 2013
The European Bioanalysis Forum dried blood spots/microsampling consortium is reporting back from the experiments they performed on further documenting the potential hurdles of the DBS technology. Their experiments focused on the impact of hematocrit changes, IS addition, spot homogeneity, aging of spots and stability of fresh blood and cards. Results ...
de Vries Ronald - - 2013
Background: The European Bioanalysis Forum dried blood spots (DBS)/microsampling consortium is reporting back from the experiments they performed on further documenting the potential hurdles of the DBS technology. This paper is focused on the impact of hematocrit changes on DBS analyses. Results: The hematocrit can have an effect on the ...
Seo Jung Hee JH Johns Hopkins University, Baltimore, MD 21218, - - 2013
A multiphysics simulation approach is developed for predicting cardiac flows as well as for conducting virtual echocardiography (ECHO) and phonocardiography (PC) of those flows. Intraventricular blood flow in pathological heart conditions is simulated by solving the three-dimensional incompressible Navier-Stokes equations with an immersed boundary method, and using this computational hemodynamic ...
Tze Wei Chu Derek - - 2013
The technique presented here uses an impedance head to measure the input impedance spectrum of a physical model of a vocal tract, and then to inject a known glottal flow waveform into the tract. The sound measured outside the mouth is used to evaluate inverse filtering techniques by comparison with ...
Smith Simeon L - - 2013
The effect of subglottic stenosis on vocal fold vibration is investigated. An idealized stenosis is defined, parameterized, and incorporated into a two-dimensional, fully-coupled finite element model of the vocal folds and laryngeal airway. Flow-induced responses of the vocal fold model to varying severities of stenosis are compared. The model vibration ...
López-Caballero Miguel M Departamento de Física y Matemática Aplicada, University of Navarra, P.O. Box 177, E-31080 Pamplona, - - 2013
The existence of energy cascades as signatures of conserved magnitudes is one of the universal characteristics of turbulent flows. In homogeneous 3D turbulence, the energy conservation produces a direct cascade from large to small scales, although in 2D, it produces an inverse cascade pointing towards small wave numbers. In this ...
Chandra Mani M Department of Physics, Indian Institute of Technology, Kanpur 208016, - - 2013
We employ detailed numerical simulations to probe the mechanism of flow reversals in two-dimensional turbulent convection. We show that the reversals occur via a vortex reconnection of two attracting corner rolls having the same sign of vorticity, thus leading to major restructuring of the flow. Large fluctuations in heat transport ...
Klopsch Christian C Department of Neurobiology, University of Vienna, Vienna, Austria. - - 2013
When hungry, the wandering spider Cupiennius salei is frequently seen to catch flying insect prey. The success of its remarkable prey-capture jump from its sitting plant into the air obviously depends on proper timing and sensory guidance. In this study, it is shown that particular features of the airflow generated ...
Yu Lu - - 2013
BACKGROUND:: Undetected apnea can lead to severe hypoxia, bradycardia, and cardiac arrest. Tracheal sounds entropy has been proved to be a robust method for estimating respiratory flow, thus maybe a more reliable way to detect obstructive and central apnea during sedation. METHODS:: A secondary analysis of a previous pharmacodynamics study ...
Hammer Michael J - - 2013
Phonatory onset is important for speech and voice and may be substantially impaired in people with Parkinson's Disease (PD). However, the physiologic contributions of laryngeal and respiratory control to phonatory onset in PD are not well understood. Acoustic measurement of phonatory onset in neurological disease has been limited due to ...
Dai Xiwen - - 2012
In this paper, a theoretical model is developed to study the acoustical response of a Helmholtz resonator as a duct-branched acoustic absorber subjected to both high-intensity sound and grazing flow. The present model is comprised of a discrete vortex model in combination with a one-dimensional duct sound propagation model. The ...
Zhao Jing - - 2012
BACKGROUND AND AIMS: Disturbances of microcirculation and hemorheological changes in the inner ear are the results of noise-induced hearing loss (NIHL). Both the disturbances of microcirculation and hemorheological changes are the etiologies of NIHL development, but they are also the results. Although previous reports that inhalation of high concentration of ...
Nilsson Anders - - 2012
PURPOSE: To evaluate accuracy and noise properties of a novel time-resolved, three-dimensional, three-directional phase contrast sequence with variable velocity encoding (denoted 4D-vPC) on a 3 Tesla MR system, and to investigate potential benefits and limitations of variable velocity encoding with respect to depicting blood flow patterns. MATERIALS AND METHODS: A ...
Guzmán-Lastra Francisca - - 2012
Self-propelled microorganisms, such as unicellular algae or bacteria, swim along their director relative to the fluid velocity. Under a steady shear flow the director rotates in close orbit, a periodic structure that is preserved under an oscillatory shear flow. If the shear flow is subjected to small fluctuations produced by ...
Jing Xiaodong - - 2012
This paper addresses the problem how to measure acoustic impedance of microperforation panels (MPPs) under flow conditions. Since 1960s, many different methods have been proposed to tackle this problem, mainly motivated by the aim of reducing noise emission from aeroengines, ventilators and other fluid machines. It has been found that ...
Xu Yaoqiang - - 2012
ABSTRACT Background: Hypoperfusion of the pulmonary vascular bed under the condition of congenital cardiac malformations may lead to progressive pulmonary vascular disease. To improve the mechanistic understanding of this disease, we examined the biochemical and morphological changes of the lung in a relevant animal model and provided valuable insights into ...
Dehner Rick - - 2012
Broadband noise, accompanying the flow separation and turbulence, is studied for an automotive centrifugal compressor on a steady-flow turbocharger bench facility. When operated in the mid-flow region, the current compressor exhibited elevated broadband noise at high frequencies, which was evident both in the upstream compressor duct and external sound pressure ...
Zhang Yingze Y Division of Pulmonary, Allergy and Critical Care Medicine, Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, - - 2012
This review examines the recent literature on molecular biomarkers of idiopathic pulmonary fibrosis (IPF). Specific attention is dedicated to the recent studies that identified the genes associated with IPF and the peripheral blood biomarkers that predict outcome in IPF. Multiple studies attempted to identify diagnostic and predictive biomarkers in IPF. ...
Ivanenko Natalya B - - 2012
Determination of aluminum (Al), beryllium (Be), cadmium (Cd), chromium (Cr), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), and thallium (Tl) concentrations in human blood using high-frequency modulation polarization Zeeman graphite furnace atomic absorption spectrometry (GFAAS) was performed. No sample digestion was used in the current study. Blood samples were ...
Robbins Anthony - - 2012
When the US Centers for Disease Control met a hard wall of political restraint in attempting a full response to the emergency of AIDS in the early 1980s, it was possible to move toward protection of blood and blood products from the legislative branch of government instead - despite resistance ...
Meesters Roland Jw - - 2012
Background: The hematocrit effect is a hurdle for successful introduction of the dried blood spot (DBS) in a regulated environment. Recently, attempts were taken to overcome the hematocrit effect by whole-cut DBS analysis. This paper presents the next-generation whole-cut DBS; dried matrix on paper disks (DMPD). Results: DMPD eliminated the ...
Yang Ling - - 2012
Morbidity from allergic diseases is increasing. Basophils play a critical role in systemic anaphylaxis and chronic allergic inflammation. The prenatal environment must be regarded as a possible early risk factor for allergic diseases in children. Our objective was to determine if basophils harvested from neonates genetically predisposed to atopic disease ...
Nogueira R B - - 2012
Systemic vascular impedance represents the retrograde strength of the blood flow to the left ventricle, thus it is one of the main compounds of afterload. Mitral regurgitation is markedly sensitive to afterload alterations. The purpose of this study was to evaluate muscular arterial impedance in dogs with chronic degenerative mitral ...
Uhl J-F - - 2012
The aim of this paper is to demonstrate the location of the venous foot pump using an anatomical study. Four hundred cadaveric feet were injected with green neoprene latex followed by a dissection. A coloured segmentation of the venous system was achieved. The Lejars' concept of the venous sole of ...
Bonnin Philippe - - 2012
BACKGROUND AND AIMS: Active Crohn's disease affects intestine but may alter other locations as eyes vasculature. Previous studies provide evidence of elevated blood flow velocities (BFv) and volume (BFV) in superior mesenteric artery (SMA). We prospectively studied hemodynamics in feeding arteries of bowel and eyes before and 2weeks after treatment ...
Noizat-Pirenne F - - 2012
Transfusion remains a key treatment in sickle cell disease. The occurrence of a delayed haemolytic transfusion reaction is not rare and is a life-threatening event. The main cause of delayed haemolytic transfusion reaction is production of alloantibodies against red blood cell antigens. The high rate of alloimmunization in sickle cell ...
Bird James - - 2012
Transfusion of large amounts of blood products is a complex and changing practice. British and American military experience of the process in Afghanistan and Iraq, and the findings of the international CRASH 2 study (Shakur et al 2010), have led to changes in practice (Moor et al 2009). The procedure ...
Jeong Woo Kyoung - - 2012
Objectives- The purpose of this study was to categorize hepatofugal portal venous flow on Doppler sonography after liver transplantation and to investigate its clinical importance and presumed causes based on radiologic and pathologic findings. Methods- This retrospective study was approved by our Institutional Review Board, and the requirement for informed ...
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