Search Results
Results 351 - 400 of 2019
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Sun Hui - - 2013
Growing environmental concerns and the need for better power balancing and frequency control have increased attention in renewable energy sources such as the reversible pump-turbine which can provide both power generation and energy storage. Pump-turbine operation along the S-shaped curve can lead to difficulties in loading the rejection process with ...
Chatzichristodoulou C - - 2013
An electrochemical test station capable of operating at pressures up to 100 bars and temperatures up to 400 °C has been established. It enables control of the partial pressures and mass flow of O2, N2, H2, CO2, and H2O in a single or dual environment arrangement, measurements with highly corrosive media, ...
Schmiedeberg Michael - - 2013
By using molecular-dynamics simulations, we determine the jamming phase diagrams at high densities for a bidisperse mixture of soft spheres that interact according to repulsive power-law pair potentials. We observe that the relaxation time varies nonmonotonically as a function of density at constant temperature. Therefore, the jamming phase diagrams contain ...
Burtch Nicholas C - - 2013
Fundamental insight into how low pressure adsorption properties are affected by chemical functionalization is critical to the development of next-generation porous materials for postcombustion CO2 capture. In this work, we present a systematic approach to understanding low pressure CO2 affinity in isostructural metal-organic frameworks (MOFs) using molecular simulations and apply ...
de Groot Sonja - - 2013
The purpose of this study was to evaluate the effect of wheelchair mass, solid vs. pneumatic tires and tire pressure on physical strain and wheelchair propulsion technique. 11 Able-bodied participants performed 14 submaximal exercise blocks on a treadmill with a fixed speed (1.11m/s) within 3 weeks to determine the effect ...
Ford Michael T - - 2013
By drawing from theoretical perspectives suggesting that unfair conditions threaten fundamental psychological needs, perceived unfairness at work was proposed and tested as a predictor of resting blood pressure. As part of the Midlife Development in the United States Biomarkers project, participants completed questionnaires measuring perceived unfairness, self-esteem and coworker support. ...
Veríssimo Helena - - 2013
The concept of Ecological Potential was explored using the macrobenthic communities of the Mondego estuary (Portugal). Different scenarios (loss of a primary producer and intertidal habitat, and habitat modification due to hydromorphological changes and continued press perturbation) were tested to predict changes in the biology if hydromorphological pressures could be ...
De Somer F - - 2013
Based on their design, all membrane oxygenators generate a certain resistance to flow. In clinical practice, this resistance is calculated by measuring both blood flow and the pressure drop over the oxygenator. Historically, some designs, such as the Kolobow spiral coil oxygenator and the Cobe flat sheet oxygenator, had quite ...
Amaraesekera Bernard - - 2013
A robust, modular, semi-automated synthesis unit useful for conducting radiochemical reactions under pressurized conditions (up to ∼200psi [1.4MPa]) for the production of PET biomarkers has been developed. This compact unit (7.6cm×33.0cm×58.4cm) is capable of performing any single step reaction that is generally encountered in radiochemical syntheses, and multiple units can ...
Prigozhin Maxim B MB Department of Chemistry, Center for the Physics of Living Cells and Beckman Institute, University of Illinois, Urbana, IL 61801, - - 2013
Using a newly developed microsecond pressure-jump apparatus, we monitor the refolding kinetics of the helix-stabilized five-helix bundle protein λ*YA, the Y22W/Q33Y/G46,48A mutant of λ-repressor fragment 6-85, from 3 μs to 5 ms after a 1,200-bar P-drop. In addition to a microsecond phase, we observe a slower 1.4-ms phase during refolding ...
Dellarole Mariano - - 2013
The 2/2 hemoglobin of the cyanobacterium Synechococcus sp. PCC 7002, GlbN, coordinates the heme iron with two histidines and exists either with a b heme or with a covalently attached heme. The binding of exogenous ligands displaces the distal histidine and induces a conformational rearrangement involving the reorganization of internal ...
Brook Robert D - - 2013
Many antihypertensive medications and lifestyle changes are proven to reduce blood pressure. Over the past few decades, numerous additional modalities have been evaluated in regard to their potential blood pressure-lowering abilities. However, these nondietary, nondrug treatments, collectively called alternative approaches, have generally undergone fewer and less rigorous trials. This American ...
Fallas Morgane M - - 2013
The influence of pressure on the retention of several types of solute, including acids, bases and neutrals, was studied by the use of restriction capillaries added to the end of various monomeric and polymeric octadecylsilyl-modified 5μm particle size columns. Although it appeared that certain polymeric columns could give somewhat greater ...
Hikal Walid M - - 2013
We report the direct determination of vapor pressures and optical and thermodynamic parameters of powders of low-volatile materials in their vapor phase using a commercial UV/Vis spectrometer. This methodology is based on the linear proportionality between the density of the saturated gas of the material and the absorbance of the ...
Pedrueza Esteban - - 2013
A study based on photoluminescence and absorption measurements as a function of temperature and pressure for PbSe nanocrystals with sizes in the range 3-13 nm reveals the influence of size quantum confinement on the observed variation. In the case of the temperature variation, the effective bandgap changes from showing a positive ...
Starr D E - - 2013
Heterogeneous chemical reactions at vapor/solid interfaces play an important role in many processes in the environment and technology. Ambient pressure X-ray photoelectron spectroscopy (APXPS) is a valuable tool to investigate the elemental composition and chemical specificity of surfaces and adsorbates on the molecular scale at pressures of up to 130 ...
Liang Yang-Min - - 2013
Due to granule size, substrate and oxygen become limited in the core of granules leading to cell lysis at the core. Loss of granule stability is still a major barrier for practical application of AG. Compared to ambient pressure condition (AP), operation of AG under high pressure (HP) is a ...
Errandonea Daniel - - 2013
Zircon-type PrVO4 and SmVO4 have been studied by high-pressure Raman spectroscopy up to 17 GPa. The occurrence of phase transitions has been detected when compression exceeds 6 GPa. The transformations are not reversible. Raman spectra of the high-pressure phases show similarities with those expected for a monazite-type phase in PrVO4 ...
Yokokawa Fumiaki - - 2013
Introduction: The renin-angiotensin-aldosterone system (RAAS) has long been established as a key pathway in the regulation of blood pressure and body fluid volume. The aspartic protease renin is responsible for the initial and rate-limiting step of the RAAS; hence inhibition of renin would favor an upstream blockade or modulation of ...
Zhan Xiancheng - - 2013
Abstract Objective: To establish a new osmotic pressure measuring method with a wide measuring range. Method: The osmotic pressure of drug solutions is determined by measuring the relative air humidity in equilibrium with the solution. The freezing point osmometry is used as a control. Results: The data obtained by the ...
Wang Qiong - - 2013
How underwater diving effects the function of the arterial wall and the activities of endothelial cells is the focus of recent studies on decompression sickness. Here we describe an in vitro diving system constructed to achieve real-time monitoring of cell activity during simulated dives under fluorescent microscopy and confocal microscopy. ...
Ikeyama Kazuyuki - - 2013
BACKGROUND: We previously showed that application of hydraulic pressure to cultured human keratinocytes induced elevation of intracellular calcium concentration ([Ca(2+) ]i ), but the absolute value of the pressure could not be determined. PURPOSE: To evaluate the effect of the absolute value of pressure on keratinocytes and other skin cells. ...
Kuruppu Dulanji - - 2013
OBJECTIVE: Se is an antioxidant micronutrient and has been studied for its potential role in CVD prevention. The purpose of the present study was to conduct a systematic review of the literature on the relationship between Se and hypertension. DESIGN: We conducted a systematic literature search in PubMed and OVID ...
Badrov Mark B - - 2013
Isometric handgrip (IHG) training lowers resting blood pressure (BP) in both hypertensives and normotensives, yet the effect of training dose on the magnitude of reduction and the mechanisms associated with the hypotensive response are elusive. We investigated, in normotensive women, the effects of two different doses of IHG training on ...
Nelson Joan M - - 2013
AIMS AND OBJECTIVES: To evaluate constructs from the theory of planned behavior (TPB, Ajzen 2002) - attitudes, sense of control, subjective norms and intentions - as predictors of accuracy in blood pressure monitoring. BACKGROUND: Despite numerous initiatives aimed at teaching blood pressure measurement techniques, many healthcare providers measure blood pressures ...
Chen Hongzhang - - 2013
A self-designed novel solid-state fermentation (SSF) bioreactor named "gas double-dynamic solid-state fermentation bioreactor (GDSFB)" showed great success in processes for the production of several valuable products. For the present study, a simple GDSFB (2 L in volume) was designed to investigate the impact of exhaust time on SSF performance. Both air ...
Kolling William M - - 2013
Objective. To assess the effectiveness of using a vapor pressure osmometer to measure the accuracy of pharmacy students' compounding skills. Design. Students calculated the theoretical osmotic pressure (mmol/kg) of a solution as a pre-laboratory exercise, compared their calculations with actual values, and then attempted to determine the cause of any ...
Elliott William J - - 2013
Hypertension is an important public health problem both in the United States and worldwide, contributing to many forms of cardiovascular and renal diseases. Although great strides have been made in the proportion of the US population that achieves recommended blood pressure targets, many Americans still have undertreated and uncontrolled blood ...
Cheng Tian-Le - - 2013
The self-assembly behavior of shape-anisotropic particles at curved fluid interfaces is computationally investigated by diffuse interface field approach (DIFA). A Gibbs-Duhem-type thermodynamic formalism is introduced to treat heterogeneous pressure within the phenomenological model, in agreement with Young-Laplace equation. Computer simulations are performed to study the effects of capillary forces (interfacial ...
Swann Alan C AC Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, 1941 East Road, Room 3216, Houston, TX 77054, USA. - - 2013
Rapid-response impulsivity, characterized by inability to withhold response to a stimulus until it is adequately appraised, is associated with risky behavior and may be increased in a state-dependent manner by norepinephrine. We assessed effects of yohimbine, which increases norepinephrine release by blocking alpha-2 noradrenergic receptors, on plasma catecholamine metabolites, blood ...
Joyner Michael J - - 2013
This focused review serves to explore relevant issues in regard to blood pressure regulation and by doing so, provides the initial stimulus paper for the Thematic Review series "Blood Pressure Regulation" to be published in the European Journal of Applied Physiology over the coming months. In this introduction, we highlight ...
Roskes Marieke - - 2013
Four experiments were designed to test the hypothesis that performance is particularly undermined by time pressure when people are avoidance motivated. The results supported this hypothesis across three different types of tasks, including those well suited and those ill suited to the type of information processing evoked by avoidance motivation. ...
Dey Zita Ranajoy - - 2013
Abstract Pressure mapping techniques are used in wheelchair and seating services to assess posture and assist in the prevention and treatment of pressure ulcers. The Force Sensitive Application (FSA) pressure mapping systems in Wales have a high clinical use and frequent calibration is required. This project aimed to assess the ...
Schücker Linda - - 2013
The self-focus theory of choking under pressure explains decreases in performance of well-learned motor tasks with an increase in skill-focused attention. This shift in attentional focus has been demonstrated; however, specific propositions about the processes in pressure-induced attentional shift are yet to be developed. This study assesses whether specific aspects ...
Bapat Prasad N - - 2013
We report the effect of applied pressure on the dielectric properties of the B2 phase of a bent-core liquid crystal. This study on bent-core banana-shaped molecules shows that while the dielectric anisotropy hardly varies with pressure, the relaxation parameters associated with the rotation around the long axes of the molecules ...
Garrusi Behshid - - 2013
To generate the Persian version of the Perceived Socio-cultural Pressure Scale. The study, done in Kerman, Iran, from November 2010 to February 2011, comprised 1200 volunteers. After translation and back-translation, the questionnaire's internal consistency, criterion and construct validity were evaluated, individual and global scores of the Perceived Socio-cultural Pressure Scale ...
Chicote Juan C - - 2013
Principal component analysis and functional regression are combined in a model to analyze a time series of pressure maps. The model is tested measuring the pressures over a chair seat while a subject performs a combination of simple movements. A sampling rate of 3 Hz is adequate for applying the ...
Mahmood Syed Esam SE Assistant Professor, Department of Community Medicine, Rohilkhand Medical College and Hospital , Bareilly U.P. - 243006, India - - 2013
Hypertension is the most common disorder which is encountered in outdoor patients. The existing data suggests that there is an increase in the prevalence of pre-hypertension and hypertension in India. The prevalence of hypertension will increase even further, unless broad and effective preventive measures are implemented. The main objective of ...
Le Ngoc Tuan - - 2013
The objective of this work was to optimize the ultrasound (US) pretreatment of sludge. Three types of sewage sludge were examined: mixed, secondary and secondary after partial methanisation ("digested" sludge). Thereby, several main process parameters were varied separately or simultaneously: stirrer speed, total solid content of sludge (TS), thermal operating ...
Rossi Amanda M - - 2013
Ever since the first set of hypertension recommendations which were generated from the Canadian Hypertension Education Program, lifestyle and health behaviour have been a key focus. An initial recommendation focused on the benefits of aerobic exercise to reduce resting blood pressure (BP). However, until the 2013 edition, resistance exercise (RT) ...
Cirillo Massimo - - 2013
The Gubbio Study is a prospective epidemiological study on the population residing in the city of Gubbio, Italy. Original objectives of the study were the control of hypertension and the role of cellular electrolyte handling in hypertension. Other objectives were added during the 30-year activity of the study. The original ...
de Lusignana Simon - - 2013
Strict control of systolic blood pressure is known to slow progression of chronic kidney disease (CKD). Here we compared audit-based education (ABE) to guidelines and prompts or usual practice in lowering systolic blood pressure in people with CKD. This 2-year cluster randomized trial included 93 volunteer general practices randomized into ...
Boden Jane - - 2013
Assisted reproductive technology (ART) offers patients the hope that they may have a child and provides the primary motivation for treatment. Despite the treatment failure, for many, the hope of conception remains. The decision to abandon treatment is momentous, especially for those couples with a diagnosis of unexplained infertility. The ...
Coulon Sandra M SM Department of Psychology, University of South Carolina, Barnwell College, Columbia, SC 29208, USA. - - 2013
High blood pressure disproportionately affects African-American adults and is a leading cause of stroke and heart attack. Engaging in recommended levels of physical activity reduces blood pressure, and social and physical environmental supports for physical activity may increase engagement in physical activity. Based on social cognitive theory within a bioecological ...
Reineke Kai - - 2013
It is well known that spore germination and inactivation can be achieved within a broad temperature and pressure range. The existing literature, however, reports contradictory results concerning the effectiveness of different pressure-temperature combinations and the underlying inactivation mechanism(s). Much of the published kinetic data are prone to error as a ...
Ahmad Sharifah Mumtazah Syed - - 2013
This article presents an analysis of handwritten signature dynamics belonging to two authentication groups, namely genuine and forged signature samples. Genuine signatures are initially classified based on their relative size, graphical complexity, and legibility as perceived by human examiners. A pool of dynamic features is then extracted for each signature ...
Jones Antwan - - 2013
Demographic and epidemiologic research suggest that cardiovascular illness is negatively linked to socioeconomic status and positively related to racial residential segregation. Relying on 2005 data from the Behavior Risk Factor Surveillance Survey and the American Community Survey, this study examines how segregation and SES (individual and metropolitan) impact hypertension for ...
Minina E - - 2013
We investigate the influence of dimensionality of a sample on the properties of magnetic dipolar soft spheres. Molecular dynamics simulations and diagram expansion are employed to analyze the pressure and microscopic structure of model monodisperse magnetic fluids in a bulk and in a monolayer. We found that, for a broad ...
Pfeiffer H - - 2013
High-pressure investigations of phospholipids at low degrees of hydration are highly important due to the continuous interest in hydration related phenomena. This is for instance the case when discussing differences between the molecular behaviour under hydrostatic or hydration pressure, e.g. to characterise the structural and thermodynamic conditions that hold for ...
Ariyabuddhiphongs Vanchai - - 2013
Our study hypothesizes that Thai amateur golfers gamble on their game because of peer pressure and their golf self-efficacy. To support our hypothesis, we conducted a study to examine the mediating effect of golf self-efficacy on the peer pressure-golf gambling relationship among 387 amateur golfers in Thailand. Peer pressure was ...
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