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Digilov Rafael M - - 2011
We describe an unsteady pressure-driven capillary viscometer, in which the liquid under test is forced through a capillary tube by compressed-air pressure. The principle of operation involves measurement of the driving pressure versus time that decays progressively as the fluid flows and covers continuously a broad shear rate range in ...
Pereira Carla M - - 2011
Swimming effort of hatchling sea turtles varies across species. In this study we analysed how swim thrust is produced in terms of power stroke rate, mean maximum thrust per power stroke and percentage of time spent power stroking throughout the first 18 h of swimming after entering the water, in ...
Ruschitzka Frank - - 2011
Hypertension constitutes a major risk factor for an array of cardiovascular diseases. Rates of morbidity and mortality related to its complications are high and remain an important concern in terms of public health. Improvement in cardiovascular outcomes and survival is an ultimate goal of the antihypertensive treatment. However, despite the ...
Scheperle Rachel A - - 2011
Quantifying ear-canal sound level in forward pressure has been suggested as a more accurate and practical alternative to sound pressure level (SPL) calibrations used in clinical settings. The mathematical isolation of forward (and reverse) pressure requires defining the Thévenin-equivalent impedance and pressure of the sound source and characteristic impedance of ...
Erbel Raimund - - 2011
Prehypertension is a frequent condition and has been demonstrated to increase cardiovascular risk. However, the association with coronary atherosclerosis as part of target organ damage is not well understood. We investigated the cross-sectional relationship and longitudinal outcome between blood pressure categories and coronary artery calcification (CAC), quantified by electron beam ...
Wells Ellen M - - 2012
Evidence suggests selenium concentrations outside the nutritional range may worsen cardiovascular health. This paper examines the relationship between selenium and maternal blood pressure (BP) among 270 deliveries using umbilical cord serum as a proxy for maternal exposure levels. Multivariable models used linear splines for selenium and controlled for gestational age, ...
Granone Tiffany D - - 2011
Objective  To compare isoflurane, sevoflurane and desflurane for inhalant anesthesia in red-tailed hawks (Buteo jamaicensis) in terms of the speed and characteristics of induction; cardiovascular and respiratory parameters while anesthetized; and speed and quality of recovery. Study design  Prospective, cross over, randomized experimental study. Animals  12 healthy adult red-tailed hawks. ...
Lai Li-Wei - - 2011
This study focuses on the relationship between photochemical smog (PS) (hourly ozone conc. >100 ppb), PS-related diseases, and the synoptic weather patterns during 2005-2009 in metropolitan Taipei. The results show that compared to respiratory ailments (ICD code 460-519) and asthma (ICD code 493), cardiovascular ailments (ICD code 390-459) were more clearly ...
Canivel Randy - - 2011
Peripheral isometric contractions may lead to enhanced performance. Previous research utilizing hand-grip protocols indicates increased stabilization and peak power outputs. Research is lacking with the grip vs. no-grip protocol during sustained efforts. The purpose of this study is to determine cardiovascular reactions (i.e. heart rate, blood pressure, and rate pressure ...
Keszler Martin - - 2011
ObjectiveThe authors previously showed that 48% of infants <800 g were ventilated with tidal volume (VT) < dead space (DS) using volume guarantee (VG) ventilation. Here, The authors sought to confirm those findings under the rigorous conditions of a bench study.Design and methodsThe authors measured the time to wash out ...
Mitchell Jamie R - - 2012
Vascular neck restraint (VNR) is a technique that police officers may employ to control combative individuals. As the mechanism of unconsciousness is not completely understood, we tested the hypothesis that VNR simply compresses the carotid arteries, thereby decreasing middle cerebral artery blood flow. Twenty-four healthy police officers (age 35 ± ...
Convertino Victor A - - 2011
INTRODUCTION: Hemorrhage is accompanied by baroreflex-mediated tachycardia and vasoconstriction. The difference between baseline and maximum responses is defined as the heart rate (HR) and vasoconstrictor 'reserve'. OBJECTIVE: To test the hypothesis that higher HR and vasoconstrictor reserves in subjects with high tolerance (HT) to central hypovolemia is associated with greater ...
Guennou Mael - - 2011
We report a pressure-dependent investigation of KMnF(3) by x-ray diffraction up to 30 GPa. The results are discussed in the framework of Landau theory and in relation to the isostructural phase transition in SrTiO(3). The phase transition temperature near 186 K in KMnF(3) shifts to room temperature at a critical pressure of ...
Kikuchi Koichi - - 2011
Dependence of the Tc and Pc of the pressure-induced superconductor β-(BDA-TTP)<sub>2</sub>I<sub>3</sub> [BDA-TTP = 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene] on the orientation of uniaxial strain has been investigated. Based on the overlap between the upper and lower bands in the energy dispersion curve, the pressure orientation is thought to change the half-filled band to the ...
Dauphinot Virginie - - 2011
BACKGROUND: Sympathetic "overactivity" during night is a well recognized factor of hypertension development in adults. However, the deleterious effect of nocturnal autonomic activation in elderly remains controversial. METHODS: Subjects, all aged 65years at baseline, were selected from the PROOF cohort study, a prospective observational cohort of subjects. Exclusion criteria were ...
Davidson Alistair J - - 2011
We report an unexpectedly high chemical stability of molecular solid 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) under static high pressures. In contrast to the high-pressure behavior of the majority of molecular solids, TATB remains both chemically stable and an insulator to 150 GPa-well above the predicted metallization pressure of 120 GPa. Single crystal studies ...
Fan Lili - - 2011
Graphene domains in different shapes have been grown on copper substrates via atmospheric pressure chemical vapour deposition by controlling the growth process parameters. Under stabilized conditions, graphene domains tend to be six-fold symmetric hexagons under low flow rate methane with some domains in an irregular hexagonal shape. After further varying ...
Alian Aymen A - - 2011
INTRODUCTION: Our study sought to explore changes in photoplethysmographic (PPG) waveform param- eters, during lower body negative pressure (LBNP) which simulated hypovolemia, in spontaneously breathing volunteers. We hypothesize that during progressive LBNP; there will be a preservation of ear PPG parameters and a decrease in finger PPG parameters. METHODS: With ...
Kim Dong-Joo DJ Department of Neurosurgery, Addenbrookes Hospital, University of Cambridge, Cambridge, United Kingdom. - - 2012
The Monro-Kellie doctrine describes the principle of homeostatic intracerebral volume regulation, which stipulates that the total volume of the parenchyma, cerebrospinal fluid, and blood remains constant. Hypothetically, a slow shift (e.g., brain edema development) in the irregular vasomotion-driven exchanges of these compartmental volumes may lead to increased intracranial hypertension. To ...
Sonkodi Balazs - - 2011
BackgroundHungary has one of the highest mortality rates due to strokes among the European Union countries. As elevated blood pressure (BP) is the principal risk factor for strokes, we assessed BP levels, as well as awareness and treatment status of hypertension and prehypertension in a working population sample in Hungary.MethodsWorksite ...
Park Jonas J-H - - 2011
Since inner ear hair cells are mechano-electric transducers the control of hydrostatic pressure in the inner ear is crucial. Most studies analyzing dynamics and regulation of inner ear hydrostatic pressure performed pressure measurements in the cochlea. The present study is the first one reporting about absolute hydrostatic pressure values in ...
Gavish Benjamin - - 2011
To challenge the widely accepted explanation of hydrostatic effect for blood pressure (BP) variation in response to arm elevation by testing the hypothesis that SBP and DBP measurements in the same individual vary differently with cuff height, and to evaluate the potential deviation of these measurements from the value predicted ...
Quan Zewei - - 2011
Using an in-situ synchrotron X-ray diffraction technique, a pressure-induced phase transformation of PbTe nanocrystals with sizes of 13 nm and 5 nm up to ~20 GPa was studied. Upon an increase of pressure, we observed that the 13 nm PbTe nanocrystals start a phase transformation from rocksalt structure to an ...
Murgia Xabier - - 2011
Abstract Background: Aerosol delivery of surfactant and perfluorocarbon (PFC) is a desirable therapeutic approach for the treatment of various lung diseases in patients undergoing mechanical ventilation. However, the behavior of these substances during aerosolization differs significantly from that of aqueous solutions. In particular, the high vapor pressure of many PFCs ...
Amr Yasser Mohamed - - 2011
To determine whether orally administered atenolol provides an optimal surgical field in comparison to intravenous sodium nitroprusside or esmolol during tympanoplasty. Randomized, double-blinded study. Operating room in a university hospital. 105 ASA physical status 1 and 2 adult patients undergoing tympanoplasty. Patients were randomized to three groups to receive either ...
Hernandez Sonia M - - 2011
Objective-To determine selected cardiopulmonary values and baroreceptor response in conscious green iguanas (Iguana iguana) and to evaluate the use of blood gas analysis and pulse oximetry in this species. Animals-15 healthy juvenile green iguanas. Procedures-Baseline cardiopulmonary values were determined in 15 conscious iguanas breathing room air. Effects of 100% O(2) ...
Gamelon Marlène - - 2011
Exploitation by humans affects the size and structure of populations. This has evolutionary and demographic consequences that have typically being studied independent of one another. We here applied a framework recently developed applying quantitative tools from population ecology and selection gradient analysis to quantify the selection on a quantitative trait-birth ...
Ventura Hector - - 2011
Hypertension is a major independent risk factor for cardiovascular diseases, which are the most frequent cause of death worldwide. In addition, the risk of hypertension has been associated with racial and/or ethnic background. Hispanics are the largest and fastest-growing minority population in the United States, currently comprising about 16.3% (50.5 ...
Ritchie J E - - 2011
In this study, we evaluated the performance of a humidified nasal high-flow system (Optiflow, Fisher and Paykel Healthcare) by measuring delivered FiO, and airway pressures. Oxygraphy, capnography and measurement of airway pressures were performed through a hypopharyngeal catheter in healthy volunteers receiving Optiflow humidified nasal high flow therapy at rest ...
Pypendop Bruno H - - 2011
Objective  To characterize the hemodynamic effects of dexmedetomidine in isoflurane-anesthetized cats. Study design  Prospective experimental study. Animals  Six healthy adult female cats weighing 4.6 ± 0.8 kg. Methods  Dexmedetomidine was administered intravenously using target-controlled infusions to maintain nine plasma concentrations between 0 and 20 ng mL(-1) in isoflurane-anesthetized cats. The isoflurane concentration was adjusted for ...
Hu Yue - - 2011
ZIF-8 as a promising storage material was investigated at high pressures up to ∼39 GPa by in situ FTIR spectroscopy for the first time. Structural modifications are found to be reversible in a low-pressure region but irreversible in a high-pressure region. Overall, the ZIF-8 framework exhibits an unusual chemical stability ...
McCubbin James A - - 2011
Persons with elevated blood pressure (BP) show dampened emotional responses to affect-laden stimuli. We sought to further examine cardiovascular-emotional dampening by examination of the relationship between resting hemodynamic measures and recognition of emotion in an African American community-based sample. Participants were 106 African American men and women (55 women; mean ...
Brown Stephen J - - 2011
Starvation may change autonomic nervous system activity and sensitivity such that a greater vagal withdrawal may occur during a sympathetic challenge. Six healthy humans endured a 3-day, water-only fast, during which participants were subjected to passive 80° head-up tilt testing twice on each day (a.m. and p.m.). Heart rate, heart ...
Niizeki Kyuichi - - 2012
Respiratory sinus arrhythmia (RSA) has been widely used as a measure of the cardiac vagal control in response to stress. However, RSA seems not to be a generalized indicator because of its dependency on respiratory parameter and individual variations of RSA amplitude (A(RSA)). We hypothesized that phase-lag variations between RSA ...
Peretz Jeffrey I - - 2012
One complication of TKA is postoperative anterior knee pain. Balancing retinacular tissue tension to improve patellar tracking is essential in preventing pain. Lateral release might help balance tension although the quantitative changes in patellofemoral force and pressure differentials after lateral release are unknown. We asked if there are differences in ...
Milde T - - 2011
Time-variant partial directed coherence (tvPDC) is used for the first time in a multivariate analysis of heart rate variability (HRV), respiratory movements (RMs) and (systolic) arterial blood pressure. It is shown that respiration-related HRV components which also occur at other frequencies besides the RM frequency (= respiratory sinus arrhythmia, RSA) ...
Guidone Caterina - - 2011
BACKGROUD&AIMS: Albuminuria, a chronic kidney and/or cardiovascular disease biomarker, is currently measured as albumin-to-creatinine ratio (ACR). We hypothesize that in severely obese individuals ACR might be abnormally low in spite of relatively high levels of urinary albumin due to increased creatininuria. METHODS: One-hundred-eighty-four subjects were divided into tertiles based on ...
Sousa Cláudia - - 2012
The effect of partial oxygen pressure on growth of Neochloris oleoabundans was studied at sub-saturating light intensity in a fully-controlled stirred tank photobioreactor. At the three partial oxygen pressures tested (P(O)₂= 0.24; 0.63; 0.84 bar), the specific growth rate was 1.38; 1.36 and 1.06 day(-1), respectively. An increase of the ...
Li Chi-Pei - - 2011
Bubble cavitation occurs in the flow field when local pressure drops below vapor pressure. One hypothesis states that low-pressure regions in vortices created by instantaneous valve closure and occluder rebound promote bubble formation. To quantitatively analyze the role of vortices in cavitation, we applied particle image velocimetry (PIV) to reduce ...
Carroll Douglas D School of Sport and Exercise Sciences, University of Birmingham, Birmingham, England. - - 2011
To test the reactivity hypothesis using blood pressure data collected 12 years after baseline. This study examined whether blood pressure reactions to acute mental stress predicted future blood pressure resting levels, as well as the temporal drift in resting blood pressure, and whether the prediction was affected by sex, age, ...
Hikal Walid M - - 2011
Accurate thermodynamic parameters of thin films of explosives are important for understanding their behavior in the nanometer scale as well as in standoff detection. Using UV-absorbance spectroscopy technique, accurate thermodynamic parameters such as activation energies of sublimation, sublimation rates, and vapor pressures of the explosives cyclotrimethylenetrinitramine (RDX) and 2,4,6-trinitrotoluene (TNT) ...
Wong Yeun Ying - - 2011
Increased afterload in idiopathic pulmonary arterial hypertension (IPAH) causes right ventricular (RV) hypertrophy and failure. Since RV remodelling occurs with alterations in RV oxygen metabolism, increasing our understanding in the factors determining RV O(2) consumption in IPAH is necessary. In the left ventricle, it is known that heart rate and ...
Fernández-Lao Carolina - - 2011
OBJECTIVE: The purpose of this study was to evaluate the influence of patient's attitudes toward massage on pressure pain sensitivity and the immune effects of myofascial release in breast cancer survivors (BCS). METHODS: Twenty BCS participated. They presented to the laboratory at the same time of the day on 2 ...
Dolbow D R - - 2011
Study design:Single-subject (male, 64 years of age) case.Objectives:To determine the feasibility of a home-based FES-LEC (functional electrical stimulation lower extremities cycling) program and effects on body composition, quality of life (QOL) and seat pressure mapping in an older individual with spinal cord injured (SCI).Setting:Home-based FES-LEC with internet connection. Southeastern United ...
Zhao Jinggeng - - 2011
A new type of disordered substitution alloy of Sb and Te at above 15.1 GPa was discovered by performing in situ high-pressure angle-dispersive X-ray diffraction experiments on antimony telluride (Sb(2)Te(3)), a topological insulator and thermoelectric material, at room temperature. In this disordered substitution alloy, Sb(2)Te(3) crystallizes into a monoclinic structure ...
Villano Stephanie M - - 2011
The reactions of alkyl peroxy radicals (RO2¬¬) play a central role in the low-temperature oxidation of hydrocarbons. In this work we present high pressure rate estimation rules for the dissociation, concerted elimination, and isomerization reactions of RO2. These rate rules are derived from a systematic investigation of sets of reactions ...
Moysidis Theodoros - - 2011
We analysed the effect of different body features on contact area, interface pressure and pressure distribution of three different mattresses. Thirty-eight volunteers (age ranged from 17 to 73 years, 23 females) were asked to lie on three different mattresses in a random order: I, standard hospital foam mattresses; II, higher ...
Di Noto Vito - - 2011
Conformational changes in polymer films exposed to high-pressure CO2 have been investigated with Fourier Transform Infrared (FT-IR) spectroscopy. The experimental setup, based on a custom-made stainless steel optical cell with CaF2 windows, allows measurements in a CO2 environment for pressures up to 6 MPa, in a temperature range from 293 ...
Peralta Carmen A CA San Francisco VA Medical Center, San Francisco, CA; University of California, San Francisco, CA 94121, USA. - - 2012
The association of subclinical vascular disease and early declines in kidney function has not been well studied. Prospective cohort study. Multi-Ethnic Study of Atherosclerosis (MESA) participants with estimated glomerular filtration rate (eGFR) ≥60 mL/min/1.73 m(2) with follow-up of 5 years. Pulse pressure, small (SAE) and large arterial elasticity (LAE), and ...
Hogeling Marcia - - 2011
  After treatment with continuous positive airway pressure (CPAP) via nasal masks and a face mask, three neonates developed pressure necrosis involving their central forehead and left eyebrow. The pressure necrosis resulted in permanent scarring in all three infants. We describe a case series of a new cutaneous iatrogenic complication ...
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