Search Results
Results 101 - 150 of 1048
1 2 3 4 5 6 7 8 9 10 >
Martinez-Canales Miguel - - 2012
Phases of carbon are studied up to pressures of 1 petapascal (PPa) using first-principles density-functional-theory methods and a structure searching algorithm. Our extensive search over the potential energy surface supports the sequence of transitions diamond→BC8→simple cubic under increasing pressure found in previous theoretical studies. At higher pressures we predict a ...
Lu Xin - - 2012
We use heat-capacity measurements as a function of field rotation to identify the nodal gap structure of CeIrIn_{5} at pressures to 2.05 GPa, deep inside its superconducting dome. A fourfold oscillation in the heat capacity at 0.3 K is observed for all pressures, but with its sign reversed between 1.50 and 0.90 GPa. ...
Stoetzer Marcus - - 2012
Aim. To measure and validate the permeability of pressure changes in correlation to different root filling techniques. Methods. Eighty extracted single-rooted teeth were randomly assigned to one of eight groups of ten teeth. Following standardized instrumentation and irrigation, root canal fillings were performed using either cold lateral condensation, a warm ...
Zmudzki Jarosław - - 2012
The results of previous studies on the pressures beneath the mucous membrane-supported dentures are contrary to the prevailing pain sensations and discomfort reported in practice. In this work, a FEM analysis of large displacements was used for calculation of the contact stresses beneath a lower denture that accompany destabilization under ...
Kwon Ronald Y RY La Jolla Bioengineering Institute, La Jolla, California, United States of - - 2012
Interstitial fluid flow (IFF) is a potent regulatory signal in bone. During mechanical loading, IFF is generated through two distinct mechanisms that result in spatially distinct flow profiles: poroelastic interactions within the lacunar-canalicular system, and intramedullary pressurization. While the former generates IFF primarily within the lacunar-canalicular network, the latter generates ...
Ong Frank S FS Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, - - 2012
-Angiotensin-converting enzyme (ACE) is composed of the N- and C-terminal catalytic domains. To study the role of the ACE domains in the inflammatory response, N-knockout (KO) and C-KO mice, models lacking 1 of the 2 ACE domains, were analyzed during angiotensin II-induced hypertension. At 2 weeks, N-KO mice have systolic ...
Zhang C C - - 2011
The cubic Gd2O3:Eu3+ nanorods were synthesized by a hydrothermal method. The SEM image indicated the nanorods with diameter of 30-35 nm and length of 200-500 nm. The structural stability of Gd2O3:Eu3+ nanorods was investigated by in situ high pressure luminescence and Raman spectra up to 18.9 GPa at room temperature. ...
Matthes Kai - - 2011
BACKGROUND: A novel, over-the-scope clip (OTSC) system may be suitable for closure of various GI perforations. The strength and maximum diameter of closure for a single OTSC, however, are unknown. OBJECTIVE: To determine the maximum closure capacity (diameter) and pressure threshold for a single OTSC. DESIGN: Prospective ex-vivo study. SETTING: ...
Fansa Ashraf M AM Hospital for Special Surgery, 523 E 72nd Street, New York, NY 10021, - - 2011
Autologous osteochondral transplantation procedures provide hyaline cartilage to the site of cartilage repair. It remains unknown whether these procedures restore native contact mechanics of the ankle joint. This study was undertaken to characterize the regional and local contact mechanics after autologous osteochondral transplantation of the talus. Controlled laboratory study. Ten ...
Dasmeh Pouria - - 2011
This work merges a large set of previously reported thermochemical data for myoglobin (Mb) mutants with a physiological model of O(2)-transport and -storage. The model allows a quantification of the functional proficiency of myoglobin (Mb) mutants under various physiological conditions, i.e. O(2)-consumption rate resembling workload, O(2) partial pressure resembling hypoxic ...
Guo Ting - - 2011
With 30 g glucose/l as carbon source, Clostridium beijerinckii ART124, a mutant created by atmospheric pressure glow discharge, produced 13.7 g total solvent/l (containing 3.1 g acetone/l, 10.4 g butanol/l and 0.2 g ethanol/l) in 72 h. The mutant could also use sucrose or xylose or a mixture of glucose/xylose/arabinose with nearly equal yields.
Charoenwong Duangkamol - - 2011
This work investigated the role of rpoS in the development of increased cell envelope resilience and enhanced pressure resistance in stationary-phase cells of Escherichia coli. Loss of both colony-forming ability and membrane integrity, measured as uptake of propidium iodide (PI), occurred at lower pressures in E. coli BW3709 (rpoS) than ...
Thapa Suman S - - 2011
PURPOSE: The purpose of the study was to evaluate the characteristics of central corneal thickness and its association with age, sex, and intraocular pressure in a Nepalese population. PATIENTS AND METHODS: The study design was a cross-sectional, population-based survey. Two thousand three hundred thirty patients aged 40 years and older ...
Pfenninger Lukas - - 2011
The authors conducted a morphology analysis of filtering blebs with anterior segment optical coherence tomography (AS-OCT) in patients shortly after trabeculectomy to find further criteria for success or failure of a filtering bleb. Thirty-seven patients (43 eyes) who had recently (<2 years) undergone trabeculectomy were measured 1 to 4 times ...
Conde M Miñones - - 2011
Mixed monolayers of poly(methyl methacrylate) (PMMA), the main component of hard contact lenses, and dipalmitoyl phosphatidyl choline (DPPC), a characteristic phospholipidic constituent of ocular tear films, were selected as an in vitro model in order to observe the behavior of contact lenses on the eye. Using Langmuir monolayer and Brewster ...
Hariprasad Seenu M - - 2011
To test a novel hydrogel sealant to secure sutureless sclerotomies under variable intraocular pressure conditions. In cadaver eyes, 23- and 20-gauge (G) sclerotomies were constructed. Sixteen 23-G beveled sclerotomies were constructed in 4 eyes: 8 of the incisions were treated with hydrogel sealant, while 8 were left bare. All sclerotomies ...
Lei Yuan - - 2011
Mice are commonly used in glaucoma research, but relatively little is known about aqueous outflow dynamics in the species. To facilitate future use of the mouse as a model of aqueous humor outflow, several fundamental physiological parameters were measured in the mouse eye. Eyes from adult mice of either sex ...
Kaeser Pierre-François - - 2011
We report a 14-year-old boy who presented with vision loss secondary to peripapillary neovascular membrane (PPNVM) as the initial and only symptom of papilledema secondary to idiopathic intracranial hypertension. After one lumbar puncture, visual acuity progressively recovered during the course of 1 week and further improved with the administration of ...
Yu Kehan - - 2011
Carbon nanowalls (CNWs), two-dimensional "graphitic" platelets that are typically oriented vertically on a substrate, can exhibit similar properties as graphene. Growth of CNWs reported to date was exclusively carried out at a low pressure. Here, we report on the synthesis of CNWs at atmosphere pressure using "direct current plasma-enhanced chemical ...
Zinn Pascal O - - 2011
Posterior reversible leukoencephalopathy syndrome refers to a constellation of neurologic symptoms related to temporary white matter changes. The disease typically presents in the context of an abrupt and drastic elevation in blood pressure (>180/110 mmHg). We report an unusual case of posterior reversible leukoencephalopathy syndrome in a post-operative setting, with ...
Stamper Robert L - - 2011
Doctors have not always associated elevated intraocular pressure with the vision loss from glaucoma. Although several individuals appear to have noted firmness of the eye in this condition as far back as the 10th century, elevated intraocular pressure was not routinely assessed until the latter part of the 19th century. ...
Olali C - - 2011
Purpose: To evaluate the safety and efficacy of timolol 0.5%/travoprost 0.004% combination (duotrav) as observed in primary open-angle glaucoma (POAG), ocular hypertension (OHT) and normal tension glaucoma (NTG) in real-life conditions. Materials and Methods: Patients with uncontrolled intraocular pressure (IOP) on other medication and no contraindication to β-blockers were switched ...
Vetter Jan M - - 2010
PURPOSE:To compare the course of intraocular pressure (IOP) during corneal flap preparation using four different femtosecond lasers in porcine globes. METHODS:Forty-eight (12 in each group) enucleated globes were successfully cannulated through the optic nerve. Intraocular pressure was measured continuously through the cannula during a normal lamellar flap creation (regular procedure) ...
Sigmundsson Freysteinn - - 2010
Gradual inflation of magma chambers often precedes eruptions at highly active volcanoes. During such eruptions, rapid deflation occurs as magma flows out and pressure is reduced. Less is known about the deformation style at moderately active volcanoes, such as Eyjafjallajökull, Iceland, where an explosive summit eruption of trachyandesite beginning on ...
Wagner Sara E SE College of Public Health, Department of Epidemiology and Biostatistics, Paul D. Coverdell Center for Biomedical and Health Sciences, University of Georgia, 500 D.W. Brooks Drive, Athens, GA 30602-7396, USA. - - 2010
Environmental uranium exposure originating as a byproduct of uranium processing can impact human health. The Fernald Feed Materials Production Center functioned as a uranium processing facility from 1951 to 1989, and potential health effects among residents living near this plant were investigated via the Fernald Medical Monitoring Program (FMMP). Data ...
Messlinger Karl - - 2010
To determine whether controlled changes in barometric pressure activate rat spinal trigeminal neurons as a possible animal correlate of headaches. Changes in weather accompanied by changes in atmospheric pressure are suggested to trigger primary headaches. Mechanisms that increase neuronal activity in the rat spinal trigeminal nucleus may parallel those that ...
Nicholson Wayne L - - 2010
Growth of Bacillus subtilis cells, normally adapted at Earth-normal atmospheric pressure (∼101.3 kPa), was progressively inhibited by lowering of pressure in liquid LB medium until growth essentially ceased at 2.5 kPa. Growth inhibition was immediately reversible upon return to 101.3 kPa, albeit at a slower rate. A population of B. ...
Butler Gleen J - - 2011
In the mountain climbing community, conventional prevention of altitude mountain sickness (AMS) relies primarily on a formal acclimatization period. AMS symptoms during mountaineering climbs are managed with medication, oxygen and minor recompression (1524-2438 m altitude) using a portable chamber, such as the Gamow Bag. This is not always an acceptable therapy ...
Reddy V M - - 2010
To investigate the relationship between weather variables (atmospheric pressure, temperature, water vapour pressure) and epistaxis admission rates at Derriford Hospital, Plymouth, United Kingdom. Retrospective observational study using hospital inpatient information databases to identify all patients admitted with epistaxis from April 1999 to March 2009 inclusive. Meteorological data for the same ...
Ortega Joseph K E - - 2010
Cell walls are part of the apoplasm pathway that transports water, solutes, and nutrients to cells within plant tissue. Pressures within the apoplasm (cell walls and xylem) are often different from atmospheric pressure during expansive growth of plant cells in tissue. The previously established Augmented Growth Equations are modified to ...
Ciborowski Michal - - 2010
Professional and recreational diving are growing activities in modern life. Diving has been associated with increased prevalence of stroke, hypertension, asthma, diabetes, or bone necrosis. We evaluated the effect of increased pressure equivalent to diving at 30 and 60 m for 30 min in two groups of divers using an ...
Chen Zhilin - - 2010
An open-walled ionization chamber is developed to monitor the tritium concentration in gloveboxes in tritium processing systems. Two open walls are used to replace the sealed wall in common ionization chambers, through which the tritium gas can diffuse into the chamber without the aid of pumps and pipelines. Some basic ...
Le Péchon J Cl - - 2010
Since 1850, compressed-air work has been used to prevent shafts or tunnels under construction from flooding. Until the 1980s, workers were digging in compressed-air environments. Since the introduction of tunnel boring machines (TBMs), very little digging under pressure is needed. However, the wearing out of cutter-head tools requires inspection and ...
Iwabu Akihiro - - 2010
We examined the relationships between home blood pressure (BP) and atmospheric temperature in 20 treated-hypertensive patients. A significant correlation between morning and evening BP and atmospheric temperature was found. For morning systolic blood pressure (SBP), the maximal seasonal difference was 13.2 mmHg with 25.5 degrees C temperature difference. Morning SBP ...
Rosenberry Clark - - 2010
Only a few cases of nontraumatic orbital subperiosteal hematoma due to scuba diving have been reported, and this is the first of such cases that underwent surgical intervention. This injury results from negative pressure within the face mask, suctioning orbital tissues into the mask after incomplete equilibration of pressure on ...
Marinovic Jasna - - 2010
An increasing number of recreational self-contained underwater breathing apparatus (SCUBA) divers use trimix of oxygen, helium, and nitrogen for dives deeper than 60 m of sea water. Although it was seldom linked to the development of pulmonary edema, whether SCUBA diving affects the extravascular lung water (EVLW) accumulation is largely ...
Zai Shaobo - - 2010
Bulky 2-pyridinemethanamine nickel complex activated by MAO was used as a catalyst to conduct longstanding living ethylene polymerization under atmospheric pressure to produce branched polyethylene.
Mor A - - 2010
Human divers exposed to hyperbaric pressure may suffer from cognitive and motor impairments thought to be related to high pressure effects per ce. These effects, termed high pressure neurological syndrome (HPNS), appear at pressure above 1.1 MPa. HPNS involves CNS hyperexcitability that is partially attributed to augmented responses of the ...
Arieli Ran - - 2011
Humidification of inspired gas is critical in ventilated patients, usually achieved by heat and moisture exchange devices (HMEs). HME and the endotracheal tube (ETT) add airflow resistance. Ventilated patients are sometimes treated in hyperbaric chambers. Increased gas density may increase total airway resistance, peak pressures (PPs), and mechanical work of ...
Yang Hyo-Jik - - 2010
A simple and effective digestion method was developed using a syringe. A 3 mL syringe was used to apply a pressure of 6 atm to expedite tryptic digestion. Application of a pressure of 6 atm during digestion resulted in better digestion efficiency than digestion under atmospheric pressure. The protein peaks ...
Jiang Jianguo - - 2010
This study compared the performance of anaerobic digestion (AD) of municipal solid waste under 101 kPa (R system) and 65.8 kPa (RPC system) - the atmospheric pressure on the Qinghai-Tibetan Plateau, China. Gas production, gas composition, degradation of volatile solids, pH, alkalinity, volatile fatty acids, and ammonia concentration were analyzed ...
Hart George B - - 2010
OBJECTIVES: In this study we investigate whether differences exist in human skeletal muscle (MM) and subcutaneous (SC) tissue gas tensions between chronic cigarette smokers and non-smokers measured under room air and hyperbaric conditions. METHODS: Gas tensions in resting MM and SC tissues were recorded using a mass spectrometer at four-minute ...
Nicolay Pascal - - 2010
A new kind of surface acoustic wave (SAW) sensor has been developed to measure sub-atmospheric pressure below 100 mtorr with accuracy better than 0.1 mtorr. It provides an efficient measuring solution in the pressure range inaccessible in past by conventional diaphragm-based SAW sensors. Indeed, because of the small bending force ...
de Vera Jean-Pierre - - 2010
Lichens were repetitively exposed over 22 days to thermophysical Mars-like conditions at low-and mid-latitudes. The simulated parameters and the experimental setup are described. Natural samples of the lichen Xanthoria elegans were used to investigate their ability to survive the applied Mars-like conditions. The effects of atmospheric pressure, CO(2) concentration, low ...
Ljubkovic Marko - - 2010
Recently, an increase in extravascular lung water (EVLW) accumulation with diminished left ventricular contractility within 60 min after SCUBA diving was reported. We have observed previously that diving was associated with reduced diffusing lung capacity for carbon monoxide (DLCO) and arterial oxygen pressure for up to 60-80 min postdive. Here ...
Wenger Michael - - 2010
Multiple stressor scenarios, as they are relevant in many watersheds, call for approaches extending beyond conventional chemical-focused approaches. The present study, investigated the fish population, represented by chub (Leuciscus cephalus), in the Bílina River (Czech Republic), which is impacted by various pollution sources and might pose a risk on the ...
Cabaravdic Mirsad - - 2010
Exposure to the lead is public health problem and threat to environment with proven harmful impact on human, including industrial workers and general population. Harmful impacts of exposition to nervous, endocrine, hematological, cardiovascular, immune and reproductive system to the lead are well known. This article addresses the results of retrospective ...
Pingitore Alessandro - - 2010
PURPOSE: To study by ultrasounds cardiac morphology and function early after breath-hold diving in deep water in elite athletes. METHODS: Fifteen healthy male divers (age 28 +/- 3 years) were studied using Doppler-echocardiography, immediately before (basal condition, BC) and two minutes after breath-hold diving (40 meters, acute post-apnea condition, APAC). ...
Park Bum Jin - - 2010
This paper reviews previous research on the physiological effects of Shinrin-yoku (taking in the forest atmosphere or forest bathing), and presents new results from field experiments conducted in 24 forests across Japan. The term Shinrin-yoku was coined by the Japanese Ministry of Agriculture, Forestry, and Fisheries in 1982, and can ...
Barbosa Eduardo - - 2010
This study sought to determine the effects of hyperbaric pressure on heart rate modulation, by analyzing potential changes in heart rate variability (HRV). Ten divers were exposed to pressures of 1, 2, 3, and 4 atmospheres absolute (ATA). The test was performed in a hyperbaric chamber. Heart rate (HR) was ...
1 2 3 4 5 6 7 8 9 10 >