Search Results
Results 401 - 450 of 852
< 4 5 6 7 8 9 10 11 12 13 14 >
Xu Li-Qiang - - 2011
Ancient eggshells over the past 700 years were extracted from an ornithogenic sediment profile on Guangjin Island, South China Sea. Based on SEM and nitrogen isotope analyses, we determined that neither post-depositional processes nor seabirds' dietary changes had a large influence on eggshell Hg levels. The historical change of Hg ...
Johnson Kimberly L - - 2011
Background Arterial blood sampling is subject to numerous pre-analytical errors; one of which is inadvertent venous blood sampling. Especially when assessing oxygenation and titrating ventilation, accidental venous blood sampling may lead to inappropriate respiratory care and repeated percutaneous punctures. Our purpose was to determine the effects of mean systemic blood ...
Tan Chieh-Suai - - 2011
Background: Continuous venovenous hemofiltration (CVVH) in renal failure is compromised by circuit clotting. We hypothesized that adverse circuit pressures are predictive of clotting in circuits that last less than 24 h during predilution, anticoagulant-free CVVH. Methods: This was a single-center retrospective study of 63 CVVH circuits of 13 critically ill ...
Harder David R DR Medical College of Wisconsin, Clinical and Translational Science Inst., Milwaukee, WI 53226, USA. - - 2011
While myogenic force in response to a changing arterial pressure has been described early in the 20th century, it was not until 1984 that the effect of a sequential increase in intraluminal pressure on cannulated cerebral arterial preparations was found to result in pressure-dependent membrane depolarization associated with spike generation ...
Chan R - - 2011
Vitamin D status, parathyroid hormone (PTH) level and their associations with blood pressure in Chinese population are unknown. This study examined these associations in older Chinese men. Blood pressure, serum 25-hydroxyvitamin D (25OHD) and PTH was measured in 939 community-dwelling Chinese men aged 65 years and older. Linear regression analyses ...
Scarpellini E - - 2011
Background  Cannabinoid type 1 (CB1) receptors are implicated in the control of transient lower oesophageal sphincter relaxations (TLESRs) in animals. In man, it is unclear whether CB1 receptors are involved in the control of oesophageal function. Aim  To study the effects of the CB1 receptor antagonist rimonabant on fasting and ...
Kitahara Ryo - - 2011
The ionization of internal groups in proteins can trigger conformational change. Despite this being the structural basis of most biological energy transduction, these processes are poorly understood. Small angle X-ray scattering (SAXS) and nuclear magnetic resonance (NMR) spectroscopy experiments at ambient and high hydrostatic pressure were used to examine how ...
Grøntved Anders A Institute of Sport Science and Clinical Biomechanics, University of Southern Denmark, Odense, - - 2011
In this study, we examined the influence of genetic variation in NOS3 on resting blood pressure (BP) in children and adolescents from the European Youth Heart Study (EYHS). Because the NOS3 gene expression is altered by physical activity (PA), we also tested for interaction between habitual PA and NOS3 variants ...
Avery P J PJ School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne, UK. - - 2011
The genotype at the C-11377G single-nucleotide polymorphism (SNP) (rs266729) in the adiponectin gene promoter has been shown to affect the prevalence of coronary atherosclerosis and incidence of vascular events in men, and to affect carotid intima media thickness. We have examined the relationship between this polymorphism and blood pressure in ...
Yu Yonggang G - - 2011
Structural and vibrational properties of TiS(2) with the CdI(2) structure have been studied to high pressures from density functional calculations with the local density approximation (LDA). The calculated axial compressibility of the CdI(2)-type phase agrees well with experimental data and is typical of layered transition-metal dichalcogenides. The obtained phonon dispersions ...
Qiu Feng - - 2011
Objectives: This experiment sought to compare two polymethyl pentene (PMP) hollow-fiber membrane oxygenators: the Medos HILITE 2400 LT and the Maquet Quadrox-iD Pediatric in terms of transmembrane pressure gradients and hemodynamic energy preservation under both pulsatile and non-pulsatile conditions. METHODS: A simulated pediatric extracorporeal life support (ECLS) circuit was used ...
Mozaffari Mahmood S - - 2011
We tested the hypothesis that pressure overload exacerbates oxidative stress associated with augmented mitochondrial permeability transition (MPT) pore opening and cell death in ischemic-reperfused hearts. Pressure overload decreased the level of reduced glutathione but increased nitrotyrosine and 8-hydroxydeoxyguanosine levels in ischemic-reperfused hearts. The activity of catalase, but not superoxide dismutase ...
Roemmich James N - - 2011
To examine the association between cardiovascular reactivity to a set of psychological stressors and carotid artery intima-media thickness, a marker of subclinical cardiovascular disease in healthy adolescents. Participants were 25 boys and 23 girls age 14.2 ± 0.9 years who were measured for heart rate (HR), systolic (SBP) and diastolic ...
Chung Charles S CS Molecular Cardiovascular Research Program, Sarver Heart Center, Department of Physiology, The University of Arizona, Tucson, AZ 85724, - - 2011
It remains to be established to what degree titin and the extracellular matrix (ECM) contribute to passive pressure in the left ventricle (LV). Thus, we aimed to elucidate the contribution of major molecular determinants of passive pressure in the normal mouse LV. Furthermore, we determined the working sarcomere length (SL) ...
Letson Hayley L - - 2011
OBJECTIVE:: Much controversy exists over the fluid composition for hypotensive resuscitation. We previously showed that addition of 6% Dextran-70 or hetastarch to 7.5% NaCl led to heart instability and mortality. Our aim was to examine the early resuscitative effects of 7.5% NaCl with adenosine, lidocaine, and magnesium (ALM) on hemodynamics ...
Devoe Sanford E - - 2011
The common heuristic association between scarcity and value implies that more valuable things appear scarcer (King, Hicks, & Abdelkhalik, 2009), an effect we show applies to time as well. In a series of studies, we found that both income and wealth, which affect the economic value of time, influence perceived ...
Casey Darren P DP Department of Anesthesiology, Mayo Clinic, 200 First St SW, Rochester, MN 55905, USA. - - 2011
Increased arterial stiffness is associated with higher levels of aortic wave reflection and aortic blood pressure. Recent evidence suggests a link between muscle sympathetic nerve activity and indices of arterial stiffness. Therefore, the aims of this study were to examine the relationship between resting muscle sympathetic nerve activity and characteristics ...
Bolter Chris P - - 2011
Previous reports indicate that when aortic pressure (AP) falls below the threshold (P (th)) for baroreceptor sensitivity, activity in the aortic depressor nerve (ADN) may increase. To quantify and explain this anomalous behaviour, we analysed curves describing the relationship of baroreceptor fibre activity in rabbit left ADN to AP. Data ...
Picard A - - 2011
X-ray absorption spectroscopy is a well-established method for probing local structural and electronic atomic environments in a variety of systems. We used X-ray absorption near-edge structure (XANES) spectroscopy for monitoring in real-time conditions selenium reduction in situ in live cultures of Shewanella oneidensis MR-1 under high hydrostatic pressure. High-quality XANES ...
Zhang Ying-Xiu - - 2011
Background: Body mass index (BMI) is widely used to assess the prevalence of childhood obesity in populations and its relationship with blood pressure has been observed. However, no studies on the distribution of fat mass index (FMI) and fat-free mass index (FFMI) and their relationship with blood pressure have been ...
Ryu Hee Wook - - 2011
The performance of a pilot-scale anti-clogging biofilter system (ABS) was evaluated over a period of 125days for treating ammonia and volatile organic compounds emitted from a full-scale food waste-composting facility. The pilot-scale ABS was designed to intermittently and automatically remove excess biomass using an agitator. When the pressure drop in ...
Wang Liancheng - - 2011
The structural and dynamical properties of solid ammonia borane were investigated by means of extensive density functional theory calculation up to 60 GPa. Molecular dynamics simulations suggest that the Cmc2(1) phase found by recent room-temperature x-ray diffraction experiments can be obtained from the Pmn2(1) structure at high pressure and low ...
Grygoruk Cezary - - 2011
The present study was designed to investigate the impact of pressure on nuclear DNA integrity in viable cells of mouse blastocysts. The blastocysts of hybrid F1 females [(C57Bl/10 J × CBA-H);N = 15] aged 2-3 months were exposed into the pressure impulse lasting ~0.021 s and characterized by a positive pressure peak of ~76 mmHg. ...
Habibi Javad J Department of Internal Medicine, University of Missouri, Columbia, 65212, - - 2011
There is emerging evidence that aldosterone can promote diastolic dysfunction and cardiac fibrosis independent of blood pressure effects, perhaps through increased oxidative stress and inflammation. Accordingly, this investigation was designed to ascertain if mineralocorticoid receptor blockade improves diastolic dysfunction independently of changes in blood pressure through actions on myocardial oxidative ...
Stumpf Christian - - 2011
Growing evidence shows that inflammation has a pivotal role in the pathophysiology of essential hypertension (EH). Although it has been acknowledged that target organ damage involves an inflammatory response, most work has focused on the role of macrophages, but T lymphocytes have recently become the center of interest. The goal ...
Hayashi Shiho - - 2011
Pulse wave velocity (PWV), an index of arterial stiffness, is dependent not only on structural alterations in arterial wall but also on distending pressure, which could be related to wall distensibility. We investigated the efficacy of aortic PWV (AoPWV) for detecting early to moderate atherosclerosis in Kurosawa and Kusanagi-hypercholesterolemic (KHC) ...
Hong Kyung-Won - - 2011
High blood pressure contributes to more than 10 million deaths per year worldwide through stroke and ischemic heart disease. Yet, genome-wide association studies (GWASs) have identified a small fraction of its underlying genetic factors. To identify biologically important single-nucleotide polymorphisms (SNPs) that regulate variations in blood pressure, we analyzed SNPs ...
Cortona P - - 2011
We have performed density-functional theory calculations for three crystallographic phases (cuprite, CdI(2), and CdCl(2)) of the cuprous oxide by using both the local-density approximation (LDA) and the Perdew-Burke-Ernzerhof generalized-gradient approximation. The latter gives a very good description of the properties of the cuprite phase at room temperature. In particular, the ...
Ueno Hiroyuki - - 2011
An enhanced urethral closure reflex via the spinal cord is related to urethral resistance elevation during increased abdominal pressure. However, with the exception of monoamines, neurotransmitters modulating this reflex are not understood. We investigated whether the vasopressin V(1A) receptor (V(1A)R) is involved in the urethral closure reflex in urethane-anesthetized female ...
Mączka M - - 2011
Lattice dynamics calculations and a high-pressure Raman scattering study of nanocrystalline Bi(2)MoO(6), a member of the bismuth-layered Aurivillius family of ferroelectrics, are presented. These studies showed the onset of two reversible second-order or weakly first-order phase transitions near 2.5 and 4.5 GPa as well as some subtle structural changes at 8.2 GPa. ...
Chen Yen-Hsu - - 2011
Elevated levels of serum pancreatic enzymes are frequently observed in hemodialysis (HD) patients. The complex hemodynamic, biochemical, and physiological alterations in uremia were speculated to cause excessive release of pancreatic enzymes beyond decreased renal clearance. However, hemodynamic factors are seldom explored in this aspect. We performed the study to evaluate ...
Gevgilili H - - 2011
A highly-efficient dynamic assembly method for the transformation of the initial spongy lamellar structure of concentrated linear alkylbenzene sulfonate, LAS, incorporated with sodium silicate, into spherulitic vesicles is presented. A combination of drag and pressure flows, via twin screw extrusion, was used to mitigate the ubiquitous viscoplasticity and the wall ...
Ajcharanukul O - - 2011
The effects of pulpal inflammation on the sensitivity of dentin to cold (5°C) and negative hydrostatic pressure (-300 mm Hg) stimuli in man were compared, since recent evidence suggests that these stimuli excite different classes of sensory receptors. Dentin was exposed in premolars in 14 participants aged 15-25 years. Stimuli ...
Skoumal Réka - - 2011
Parthenolide has shown promise in treatment of various cancers via inhibition of the transcription factor signal transducer and activator of transcription 3 (STAT3). Activation of STAT3 has been observed in left ventricular hypertrophy (LVH); however, its exact role is not known. The aim of the study was to examine the ...
Antonangeli Daniele - - 2011
Seismic discontinuities in Earth typically arise from structural, chemical, or temperature variations with increasing depth. The pressure-induced iron spin state transition in the lower mantle may influence seismic wave velocities by changing the elasticity of iron-bearing minerals, but no seismological evidence of an anomaly exists. Inelastic x-ray scattering measurements on ...
Amoureux Sébastien - - 2011
Brain-derived neurotrophic factor (BDNF) and TrK receptors play an important role in vascular development and response to injury. In this study, we investigated the participation of the BDNF/TrK pathway and oxidative stress during the development of hypertension in spontaneously hypertensive rats (SHR). In SHR and normotensive rats (WKY) at 6 ...
Ashbaugh Henry S - - 2011
Extensive molecular simulations of the Lennard-Jones fluid are performed to examine the response of the excess chemical potential of cavitylike solutes to applied pressure. Solutes as large as ten times the solvent diameter are considered. The simulations are analyzed using the revised scaled-particle theory developed by Ashbaugh and Pratt to ...
Pankey Edward A - - 2011
4-({(4-Carboxybutyl)[2-(5-fluoro-2-{[4'-(trifluoromethyl)biphenyl-4-yl]methoxy}phenyl)ethyl]amino}methyl)benzoic acid (BAY 60-2770) is a nitric oxide (NO)-independent activator of soluble guanylyl cyclase (sGC) that increases the catalytic activity of the heme-oxidized or heme-free form of the enzyme. In this study, responses to intravenous injections of the sGC activator BAY 60-2770 were investigated under baseline and elevated tone conditions ...
Cao Xiamin - - 2011
BACKGROUND: Changes in activity of polyphenol oxidase (PPO), peroxidase (POD) and β-glucosidase, individual phenolic compounds other than anthocyanins, total phenols, monomeric anthocyanins, polymeric color and instrumental color of strawberry pulps were assessed after high hydrostatic pressure (HHP) (400-600 MPa 5-25 min(-1)) at room temperature.RESULTS: β-Glucosidase was activated by 4.7-16.6% at ...
Mills Andrew - - 2011
A novel colourimetric 'fizziness' indicator is described which changes colour depending on the headspace pressure of carbon dioxide above a carbonated liquid.
Weerakkody R A RA Academic Department of Neurosurgery, University of Cambridge, Cambridge, UK. - - 2011
The term hydrocephalus encompasses a range of disorders characterised by clinical symptoms, abnormal brain imaging and derangement of cerebrospinal fluid (CSF) dynamics. The ability to elucidate which patients would benefit from CSF diversion (a shunt or third ventriculostomy) is often unclear. Similar difficulties are often encountered in shunted patients to ...
Ostergaard Kristine Hovkjær - - 2011
Giraffes are the tallest animals on earth and the effects of gravity on their cardiovascular system have puzzled physiologists for centuries. The authors measured arterial and venous pressure in the foreleg of anesthetized giraffes, suspended in upright standing position, and determined the ratio between tunica media and lumen areas along ...
Mallikarjunaiah K J - - 2011
Lipid bilayers represent a fascinating class of biomaterials whose properties are altered by changes in pressure or temperature. Functions of cellular membranes can be affected by nonspecific lipid-protein interactions that depend on bilayer material properties. Here we address the changes in lipid bilayer structure induced by external pressure. Solid-state ²H ...
Monette Michelle Y - - 2011
The Na-K-Cl cotransporter (NKCC2) is the major salt transport pathway in the thick ascending limb of Henle's loop and is part of the molecular mechanism for blood pressure regulation. Recent screening of ∼3,000 members of the Framingham Heart Study identified nine rare independent mutations in the gene encoding NKCC2 (SLC12A1) ...
Zhai Yong - - 2011
Pressure perturbation calorimetry (PPC) is a relatively new and efficient technique, to study the volumetric properties of biomolecules in solution. In PPC, the coefficient of thermal expansion of the partial volume of the biomolecule is deduced from the heat consumed or produced after small isothermal pressure jumps (typically±5bar). This strongly ...
Huang Chin-Ming - - 2011
Diagnosis by radial arterial pulse is very important in Traditional Chinese Medicine (TCM). The objective of this study is to evaluate the effects of detection time and position on the parameters of time- and frequency-domain of radial pulse wave and to differentiate between Dyspepsia and Rhinitis by the statistical analysis ...
Nishyama Michiko - - 2011
We describe respiration monitoring in sleep using hetero-core fiber optic pressure sensors. The proposed hetero-core fiber optic sensor is highly sensitive to macrobending as a result of the core diameter difference due to stable single-mode transmission. Pressure sensors based on hetero-core fiber optics were fabricated to have a high sensitivity ...
Benetti Thaís Helena - - 2011
Intestinal constipation--a common symptom among the general population--is more frequent in women. It may be secondary to an improper diet or organic or functional disturbances, such as dyskinesia of the pelvic floor. This is basically characterized by the absence of relaxation or paradoxical contraction of the pelvic floor and anal ...
Andersson Kennet - - 2011
A lumbar infusion test is commonly used as a predictive test for patients with normal pressure hydrocephalus and for evaluation of cerebrospinal fluid (CSF) shunt function. Different infusion protocols can be used to estimate the outflow conductance (Cout) or its reciprocal the outflow resistance (Rout), with or without using the ...
Schiffl Helmut - - 2011
Primary hyperparathyroidism (PHPT) may be associated with arterial hypertension. The underlying mechanisms are not fully understood and reversibility by parathyroid surgery is controversial. This study aimed to characterize pressor hormones, vascular reactivity to norepinephrine, and cytosolic-free calcium in platelets in 15 hypertensive patients with hypercalcaemic PHPT before and after successful ...
< 4 5 6 7 8 9 10 11 12 13 14 >