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McKellar Scott C SC EaStCHEM School of Chemistry, The Centre for Science at Extreme Conditions, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh, EH9 3JJ, UK. - - 2014
Here we report four post-synthetic modifications, including the first ever example of a high pressure-induced post-synthetic modification, of a porous copper-based metal-organic framework. Ligand exchange with a water ligand at the axial metal site occurs with methanol, acetonitrile, methylamine and ethylamine within a single-crystal and without the need to expose ...
Flin Rhona - - 2014
On April 20th 2010, a large Transocean drilling rig called the Deepwater Horizon was operating in the Gulf of Mexico to drill the Macondo well, for the oil company BP. The job was six weeks behind schedule and $58 million over budget and had not been without difficulty: it was ...
Freedman R R Schlumberger Technology Corp., 110 Schlumberger Drive, Sugar Land, Texas 77478, - - 2014
We discuss an innovative new high-performance apparatus for performing low-field Nuclear Magnetic Resonance (NMR) relaxation times and diffusion measurements on fluids at very high pressures and high temperatures. The apparatus sensor design and electronics specifications allow for dual deployment either in a fluid sampling well logging tool or in a ...
Yilmaz Z Z Departments of Nephrology, Dicle University, Faculty of Medicine, - - 2014
Maintenance of fluid status within an optimal range and accurate assessment of dry weight (DW) is essential in patients on intermittent haemodialysis (HD) treatment. In this study, we aimed to investigate the association of fluid status measured by bioimpedance analysis (BIA) with N-terminal pro-B natriuretic peptide (NT-proBNP), blood pressure and ...
Stankovich Joseph J JJ Department of Chemistry, University of Tennessee, Knoxville, TN, - - 2013
Five methods for controlling the mobile phase flow rate for gradient elution analyses using very high pressure liquid chromatography (VHPLC) were tested to determine thermal stability of the column during rapid gradient separations. To obtain rapid separations, instruments are operated at high flow rates and high inlet pressure leading to ...
Lee Manhee - - 2013
Coalescence of two kinds of pre-processed droplets is necessary to perform chemical and biological assays in droplet-based microfluidics. However, a robust technique to accomplish this does not exist. Here we present a microfluidic device to synchronize the reinjection of two different kinds of droplets and coalesce them, using hydrostatic pressure ...
Stankovich Joseph J - - 2013
Using a column packed with fully porous particles, four methods for controlling the flow rates at which gradient elution runs are conducted in very high pressure liquid chromatography (VHPLC) were tested to determine whether reproducible thermal conditions could be achieved, such that subsequent analyses would proceed at nearly the same ...
Zhao Xiao-Miao - - 2013
Both the vibrational and structural properties of coronene have been investigated upon compression up to 30.5 GPa at room temperature by a combination of Raman scattering and synchrotron x-ray diffraction measurements. The spectroscopic and crystallographic results demonstrate that two pressure-induced structural phase transitions take place at 1.5 GPa and 12.2 ...
Wagner Stefan - - 2013
Abstract Background: Pregnant diabetic patients are often required to self-measure their blood pressure in the waiting room before consultation. Currently used blood pressure devices do not guarantee valid measurements when used unsupervised. This could lead to misdiagnosis and treatment error. The aim of this study was to investigate current use ...
Queirós Rui P - - 2014
Hyperbaric storage (8h) of melon juice (a highly perishable food) at 25, 30 and 37°C, under pressure at 25-150MPa was compared with atmospheric pressure storage (0.1MPa) at the same temperatures and under refrigeration (4°C). Comparatively to the refrigerated condition, hyperbaric storage at 50/75MPa resulted in similar or lower microbial counts ...
Karatas Ahmet - - 2013
Abstract Introduction: Pendrin is an integral membrane protein and plays a key role in extracellular fluid volume and blood pressure control. We aimed to investigate the relationship between pendrin immunostaining intensity in normal and pre-eclamptic placental tissue. Methods: Fifty-six placental tissues, of which 26 were in pre-eclamptic, and 30 were ...
Qajar Ali - - 2013
Porosimetry is a fundamental characterization technique used in the development of new porous materials for catalysis, membrane separation and adsorptive gas storage. Conventional methods like nitrogen and argon adsorption at cryogenic temperatures suffer from slow adsorption dynamics especially for microporous materials. In addition, CO2 the other common probe is only ...
Kalavathi S - - 2013
AlV2O4 is the only spinel compound so far known that exists in the charge ordered state at room temperature. It is known to transform to a charge frustrated cubic spinel structure above 427 ° C. The presence of multivalent V ions in the pyrochlore lattice of the cubic spinel phase brings ...
Cong Rihong - - 2013
β-BiB3O6 was compressed in a diamond anvil cell at room temperature and studied using a combinstion of in situ high-pressure Raman scattering and angle-dispersive synchrotron X-ray diffraction. The results reveal that β-BiB3O6 retains its structure below 9.0 GPa and undergoes a structural phase transition that starts at ∼11.5 GPa and ...
Milly H - - 2013
SUMMARY Minimally invasive dentistry advocates the maintenance of all repairable tooth structures during operative caries management in combination with remineralization strategies. This study evaluated the effect of air-abrasion operating parameters on its cutting efficiency/pattern using bio-active glass (BAG) powder and alumina powder as a control in order to develop its ...
Wang J L - - 2013
We report the dramatic effect of applied pressure and magnetic field on the layered intermetallic compound Pr_{0.5}Y_{0.5}Mn_{2}Ge_{2}. In the absence of pressure or magnetic field this compound displays interplanar ferromagnetism at room temperature and undergoes an isostructural first order magnetic transition (FOMT) to an antiferromagnetic state below 158 K, followed by ...
Milot Emmanuel - - 2013
Despite popular misconceptions, natural selection does operate in modern human populations. New studies even show that changes associated with modernization are deeply reshaping selection pressures and, perhaps, bits of our biological nature.
Yang Zhi - - 2013
The gelatinization of waxy (very low amylose) and high-amylose maize starches by ultra-high hydrostatic pressure (up to 6GPa) was investigated in situ using synchrotron X-ray powder diffraction on samples held in a diamond anvil cell (DAC). The starch pastes, made by mixing starch and water in a 1:1 ratio, were ...
Pawlus S - - 2013
High pressure viscosity and dielectric measurements were carried out on two monohydroxy alcohols, 2-ethyl-1-hexanol and 5-methyl-2-hexanol, at room temperature. Analysis of the dielectric relaxation times versus viscosity revealed the breakdown of the Einstein-Debye relation above some characteristic pressure. The failure of the Einstein-Debye relation is a manifestation of pressure induced ...
Selli Daniele - - 2013
Group-IVa elements silicon and germanium are known for their semiconducting properties at room temperature, which are technologically critical. Metallicity and superconductivity are found at higher pressures only, Ge β-tin (tI4) being the first high-pressure metallic phase in the phase diagram. However, recent experiments suggest that metallicity in germanium is compatible ...
Ye Mu - - 2013
The effects of storage conditions on subsequent high-hydrostatic pressure (HHP) inactivation of Vibrio parahaemolyticus and Vibrio vulnificus in oysters were investigated. Live oysters were inoculated with V. parahaemolyticus or V. vulnificus to ca. 7-8log MPN/g by feeding and stored at varying conditions (i.e., 21 or 35°C for 5h, 4 or ...
Strider David - - 2013
Marfan Syndrome (MFS) is an autosomal dominant, connective tissue disorder that is due to a deficiency in the structural protein, fibrillin. MFS patients are more likely to experience aortic aneurysms and dissections, dislocated lens, and/or severe musculoskeletal deformities than non-MFS patients. Attainment of a longer lifespan in MFS patients is ...
Saeki Keigo - - 2013
BACKGROUND: Previous studies have proposed that higher blood pressure (BP) in winter is an important cause of increased mortality from cardiovascular disease during the winter. Some observational and physiological studies have shown that cold exposure increases BP, but evidence from a randomised controlled study assessing the effectiveness of intensive room ...
Yoshimura Yukihiro - - 2013
We explore the phase behavior of room temperature ionic liquids (RTILs) compressed under high pressure to determine whether they crystallize or hold a liquid state. RTILs have attractive supercooling properties compared with ordinary molecular liquids, which easily become a glassy state without crystallizing at ambient pressure. Thus, phase behavior under ...
Brown S J - - 2013
Acute hypoxia may alter autonomic cardiovascular reflexes during orthostasis. Heart rate variability (HRV), arterial blood pressure (MAP), and respiratory sinus arrhythmia (RSA) were recorded during supine (SUP) and passive head up tilt (HUT) in eight healthy humans, spontaneously breathing either room air or 10 % O(2) in N(2). In the time ...
Yurtseven Hamit - - 2013
We calculate here the Raman frequencies of the lattice modes A(A ( g )), B(B ( 2g )) and C(B ( 1g ) B ( 3g )) as a function of pressure at room temperature for the solid phases (II, III and III') of benzene. This calculation is performed using ...
Shu Kuo-Hsiung KH Division of Nephrology, Department of Medicine, Taichung Veterans General Hospital, Taichung, Taiwan, - - 2013
Background: The blood and membrane contact during dialysis may elicit an immune reaction. The current study looked at the impact of different dialyzers on blood levels of cytokines. Methods: During the first month, randomly selected patients were treated with one dialyzer (PF-170H) and then crossed over to another dialyzer (FLX-18GW) ...
Wen Shiwu - - 2012
Objective: It is uncertain whether preeclampsia (PE) is caused by pre-existing factors or by pregnancy itself. We want to answer this important question in public health by conducting a large pre-conception cohort in China. Methods: A prospective and pre-conception cohort study with a target recruitment of 5000 couples who plan ...
Rozwadowski Tomasz - - 2012
For 4-cyano-3-fluorophenyl 4-butylbenzoate, a glass former giving glass of nematic phase at ambient pressure and after rapid pressurizing, isothermal studies of complex dielectric permittivity vs pressure were performed near room temperature. In the previous isobaric experiment, on cooling the nematic phase two super-Arrhenius α relaxations, ascribed to the reorientations of ...
Li Xianxue - - 2012
Partial pressure suits (PPSs) are used under high altitude, low-pressure conditions to protect the pilots. However, the suit often limits pilot's mobility and work efficiency. The lack of ergonomic data on the effects of PPSs on mobility and performance creates difficulties for human factor engineers and cockpit layout specialists. This ...
Hédoux Alain - - 2012
Low-frequency Raman investigations were carried out upon pressurizing and grinding both crystalline forms of anhydrous caffeine at room temperature. These investigations have led to the detection of metastable states under stress. Upon moderated hydrostatic compression, only form I transform into a metastable state characterized by a Raman band-shape resembling that ...
Dubrovinsky Leonid - - 2012
Since invention of the diamond anvil cell technique in the late 1950s for studying materials at extreme conditions, the maximum static pressure generated so far at room temperature was reported to be about 400 GPa. Here we show that use of micro-semi-balls made of nanodiamond as second-stage anvils in conventional diamond ...
Tarafder Abhijit - - 2012
The pressure and temperature ranges within which supercritical fluid chromatography is operated are generally decided based upon limitations imposed by the instrument or by the stationary phase. Because the maximum pump outlet pressure of most commercial instruments is near 400bar and the maximum temperature at which most chiral stationary phases ...
Tarafder Abhijit - - 2012
The drops of pressure and density along chromatographic columns of different characteristics, eluted with different mixtures of carbon dioxide and methanol was mapped as functions of the column outlet pressure and the operating temperature. This paper extends an earlier report reporting the extent of the pressure and density drops along ...
Mackintosh Natalie - - 2012
Although a high fraction of inspired oxygen (FIO2) could reduce surgical site infection, there is concern it could increase postoperative pulmonary complications, including hypoxemia. Intraoperative positive end-expiratory pressure can improve postoperative pulmonary function. A practical measure of postoperative pulmonary function and the degree of hypoxemia is supplemental oxygen requirement. We ...
Gindlesberger Danielle R - - 2012
A family medicine practice in a large multi-specialty clinic undertook a quality improvement initiative focusing on blood pressure control. Current rooming procedures were reviewed, including obtaining accurate and reliable blood pressures. All rooming staff were instructed how to take an accurate blood pressure and were observed at random over a ...
Steward Jackie A - - 2012
Laboratories throughout the world that perform work with Risk Group 4 Pathogens generally adopt one of two approaches within BSL-4 environments: either the use of positive pressure air-fed suits or using Class III microbiological safety cabinets and isolators for animal work. Within the UK at present, all laboratories working with ...
Bondad J - - 2013
Photodynamic Diagnosis has been proven to improve detection of superficial bladder cancer and improve visualisation of resection margins. The use of 5-aminolevulinic acid as the photosensitising agent has been associated with side effects, specifically hypotension. We aimed to evaluate the effect of oral 5-ALA on the blood pressure in a ...
Randsoe Thomas - - 2012
The standard treatment of altitude decompression sickness (aDCS) caused by nitrogen bubble formation is oxygen breathing and recompression. However, micro air bubbles (containing 79% nitrogen), injected into adipose tissue, grow and stabilize at 25 kPa regardless of continued oxygen breathing and the tissue nitrogen pressure. To quantify the contribution of ...
Björn Lars Olof - - 2012
Breeding birds have to divide their time between egg incubation and foraging. Particularly in cases when only one parent incubates the eggs, and especially in cold climates, the cooling of the eggs during absence from the nest may be problematic. In the present study we find that the thermal emissivity ...
van Ooij P J A M - - 2012
Breathing oxygen with a partial pressure of > 50 kPa can cause pulmonary oxygen toxicity (POT). Diffusing capacity for carbon monoxide (DL(CO)) is thought to be a more sensitive indicator of POT than vital capacity (VC). Because diffusing capacity can be measured more specifically using nitric oxide (DL(NO)), we hypothesized ...
Jaspers Cornelia - - 2012
The comb jelly Mertensia ovum, widely distributed in Arctic regions, has recently been discovered in the northern Baltic Sea. We show that M. ovum also exists in the central Baltic but that the population consists solely of small-sized larvae (less than 1.6 mm). Despite the absence of adults, eggs were ...
Day Rusty Davis - - 2012
Elevated mercury concentrations ([Hg]) were found in Alaskan murre (<italic>Uria spp.</italic>) eggs from the coastal embayment of Norton Sound relative to insular colonies in the northern Bering Sea-Bering Strait region. Stable isotopes of Hg, carbon, and nitrogen were measured in the eggs to investigate the source of this enrichment. Lower ...
Koeken Yvette - - 2012
Aims At present, it is unknown why patients suffering from severe pulmonary hypertension (PH) benefit from atrial septostomy (AS). Suggested mechanisms include enhanced filling of the left ventricle, reduction of right ventricular preload, increased oxygen availability in the peripheral tissue, or a combination. A multi-scale computational model of the cardiovascular ...
Berner Marion - - 2012
Introduction: Small animal models are widely used in basic research. However, experimental systems requiring extracorporeal circuits are frequently confronted with limitations related to equipment size. This is particularly true for oxygenators in systems with limited volumes. Thus we aimed to develop and validate an ultra mini-oxygenator for low-volume, buffer-perfused systems. ...
van der Kaaij Niels P - - 2012
BACKGROUND: This study investigated the optimal alveolar oxygen concentration and inflation pressure during ischemia that reduces lung ischemia-reperfusion injury (LIRI). METHODS: Male Sprague-Dawley rats (n = 66) underwent 150 minutes of left lung ischemia by hilar clamping at an airway inflation pressure (P) of 5 or 30 cm H(2)O and ...
Smith Cameron R - - 2012
Decompression sickness (DCS) results from a decrease in ambient pressure leading to supersaturation of tissues with inert gas and bubble formation. Perfluorocarbons (PFCs) are able to dissolve vast amounts of non-polar gases. Intravenous (IV) PFC emulsions reduce both morbidity and mortality associated with DCS, but the mechanism of this protective ...
Najafi Anaraki Abdolreza - - 2012
Background: Clinical investigations have reported several anesthetic properties of intrathecal injections of meperidine. The purpose of this study was to investigate the effect of adding meperidine to intrathecal heavy lidocaine on hemodynamic changes and blood loss in patients undergoing elective suprapubic open prostatectomy. Methods: In a randomized double-blind clinical trial, ...
Xu Zhong-Tang - - 2012
LaMnO(3) (LMO) films are deposited on SrTiO(3) :Nb (0.8 wt%) substrates under various oxygen pressures to obtain different concentrations of oxygen vacancies in the films. The results of X-ray diffraction verify that with a decrease of the oxygen pressure, the c-axis lattice constant of the LMO films becomes larger, owing ...
Sun Jian - - 2012
Computational searches for structures of solid oxygen under high pressures in the multi-TPa range are carried out using density-functional-theory methods. We find that molecular oxygen persists to about 1.9 TPa at which it transforms into a semiconducting square-spiral-like polymeric structure (I4_{1}/acd) with a band gap of ∼3.0  eV. Solid oxygen forms a ...
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