Search Results
Results 51 - 100 of 1020
1 2 3 4 5 6 7 8 9 10 >
Hamza Shereen M SM Department of Pediatrics, Cardiovascular Research Centre, University of Alberta Edmonton, AB, - - 2014
Hypertension affects over 25% of the global population and is associated with grave and often fatal complications that affect many organ systems. Although great advancements have been made in the clinical assessment and treatment of hypertension, the cause of hypertension in over 90% of these patients is unknown, which hampers ...
Aoki Ken K Division of Hygiene, Department of Social Medicine, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan, - - 2013
In normothermia, the tolerance time to presyncope during an orthostatic challenge is shortened during the early morning. Heat stress reduces tolerance to presyncope and the degree of cutaneous vasoconstriction prior to presyncope. However, whether these changes show diurnal variations remains unknown. Therefore, we examined diurnal changes in orthostatic tolerance and ...
Zhao Jing-Bo JB Jing-Bo Zhao, Department of Gastroenterology and Surgery, Aalborg University Hospital, DK 9000 Aalborg, - - 2013
To generate phasic and tonic stress-strain curves for evaluation of intestinal smooth muscle function in type 2 diabetic rats during active and passive conditions. Seven diabetic Goto-Kakizaki (GK) male rats, 32-wk old (GK group), and 9 age-matched normal Wistar rats (Normal group) were included in the study. Jejunal segments were ...
Ballegaard Søren - - 2013
Objectives. To evaluate the possible association between pressure pain sensitivity of the chest bone (PPS) and cardiovascular physiological factors related to persistent stress in connection with a three-month PPS-guided stress-reducing experimental intervention programme. Methods. Forty-two office workers with an elevated PPS (≥ 60 arbitrary units) as a sign of increased ...
Turgut Coşan Didem - - 2013
Hypertension is a major health problem with increasing prevalence around the world. Tannic acid is water-soluble polyphenol that is present in tea, green tea, coffee, red wine, nuts, fruits and many plant foods. It has been reported to serve as an antioxidant or a pro-oxidant depending on the type of ...
Malan N T - - 2013
It is known that low testosterone (T) and high cortisol levels are associated with hypertension as well as with chronic stress, linking stress with elevated blood pressure (BP). However, the association between acute stress-, chronic stress responses and BP is not clear in Africans. Therefore, we examined the association between ...
Athanassiadis Athanasios G AG James Franck Institute & Department of Physics, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA. - - 2013
We present measurements of the stress response of packings formed from a wide range of particle shapes. Besides spheres these include convex shapes such as the Platonic solids, truncated tetrahedra, and triangular bipyramids, as well as more complex, non-convex geometries such as hexapods with various arm lengths, dolos, and tetrahedral ...
Gunnarsdottir Hrafnhildur - - 2013
To estimate the prevalence of time pressure experienced by parents in the Nordic countries and examine potential gender disparities as well as associations to parents' family and/or living conditions. Methods: 5949 parents of children aged 2-17 years from Denmark, Finland, Norway and Sweden, participating in the 2011 version of the ...
Levitas Valery I - - 2013
There are two main challenges in the discovery of new high pressure phases (HPPs) and transforming this discovery into technologies: finding conditions to synthesize new HPPs and finding ways to reduce the phase transformation (PT) pressure to an economically reasonable level. Based on the results of pressure-shear experiments in the ...
van Loosdregt Inge A E W - - 2013
Preclinical studies of tissue-engineered heart valves (TEHVs) showed retraction of the heart valve leaflets as major failure of function mechanism. This retraction is caused by both passive and active cell stress and passive matrix stress. Cell-mediated retraction induces leaflet shortening that may be counteracted by the hemodynamic loading of the ...
Trejo Miguel M Soft Matter Science and Engineering Laboratory (SIMM), UMR CNRS 7615, Ecole Supérieure de Physique et Chimie Industrielles (ESPCI), Université Pierre et Marie Curie, Paris (UPMC), - - 2013
Frictional properties of contacts between a smooth viscoelastic rubber and rigid surfaces are investigated using a torsional contact configuration where a glass lens is continuously rotated on the rubber surface. From the inversion of the displacement field measured at the surface of the rubber, spatially resolved values of the steady ...
Pereira A L J - - 2013
An experimental and theoretical study of the structural properties of monoclinic bismuth oxide (α-Bi2O3) under high pressures is here reported. Both synthetic and mineral bismite powder samples have been compressed up to 45 GPa and their equations of state have been determined with angle-dispersive x-ray diffraction measurements. Experimental results have been ...
Leitzke Brian T - - 2013
Although there is much evidence of hypothalamic-pituitary-adrenal axis dysfunction among individuals who have experienced child maltreatment, dysregulation of the autonomic nervous system (ANS) has received less attention. Understanding the role of the ANS in maltreated children may help clarify how these children respond to subsequent life stress. We explored ANS ...
McCoy Shannon K - - 2013
We examined the basic question of whether pressure is stressful. We proposed that when examining the role of stress or pressure in cognitive performance, it is important to consider the type of pressure, the stress response, and the aspect of cognition assessed. In Experiment 1, outcome pressure was not experienced ...
P Paranathala Menaka - - 2013
Idiopathic normal pressure hydrocephalus, an uncommon but important differential diagnosis for ataxia, cognitive impairment and urinary incontinence, is surgically treatable, unlike many of its differential diagnoses. This article discusses its assessment, investigation and therapeutic interventions.
Hatutale Annilina - - 2013
The aim of this study was to assess whether there is an association between changes in the heart rate and blood pressure after dipyridamole stress and abnormal scan findings detected with gated technetium-99m methoxy isobutylisonitrile ((99m)Tc-MIBI) myocardial perfusion imaging (MPI). A total of 200 consecutive patients with known or suspected ...
Al-Shafei Ahmad I M - - 2013
Background and aim. Effects of Ramadan fasting on health are important. Its effects on arterial pulse pressure (PP), lipid profile and oxidative stress were characterized in hypertensives. Methods. PP, indices of lipid profile and oxidative stress were measured pre-, during and post-fasting in equal (40 each), sex- and age-matched groups ...
Moyle Wendy - - 2013
Abstract Background: The anxiety associated with unfamiliar surroundings, the disorientation and mental confusion, and the social isolation that accompanies dementia can often create increased stress for people living in long-term care settings. Such a response is thought to affect the autonomic nervous system and result in emotional and physical symptoms ...
Kupper Nina - - 2013
Mechanisms relating Type D personality to poor health are largely unknown, with autonomic nervous system function being a candidate. This study examined the physiologic response to cold stress. Undergraduates (N = 101, 84% female) underwent a cold pressor test. An electrocardiogram, impedance cardiogram, and blood pressure were recorded. Type D personality was ...
Howard Siobhán - - 2013
The present study sought to examine the role of gender and Type D personality on cardiovascular reactivity to stress, by examining patterns of cardiovascular adaptation to recurrent laboratory-based stress. Cardiovascular data were collected from 76 students who, following an initial 10-minute baseline period, underwent two cognitive stress tasks. Type D ...
Zhang Xiutao X Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan - - - 2013
To explore the value of perineal ultrasound and urodynamic study in the clinical diagnosis with the morphological and functional changes and evaluation of clinical type in female patients with stress urinary incontinence (SUI). The records of 64 female patients with SUI were reviewed. Fifty females with urinary frequency but with ...
Vozzi Federico - - 2013
There is plenty of experimental evidence to show that endothelial cells are sensitive to flow, but very little attention has been paid to fluid pressure or pressure gradients which are used to drive viscous flow. In fact there are two principal physical forces exerted on the blood vessel wall by ...
Kwak Jung Hyun JH Yonsei University Research Institute of Science for Aging, Yonsei University, Seoul, - - 2013
Black soy peptides have been shown to possess properties that may decrease blood pressure (BP). To examine the effects of black soy peptide supplementation on BP and oxidative stress in subjects with prehypertension or stage I hypertension, 100 participants with an initial untreated systolic blood pressure (SBP) of 130-159 mm ...
Guyll Max - - 2013
Innocent suspects may not adequately protect themselves during interrogation because they fail to fully appreciate the danger of the situation. This experiment tested whether innocent suspects experience less stress during interrogation than guilty suspects, and whether refusing to confess expends physiologic resources. After experimentally manipulating innocence and guilt, 132 participants ...
Malan Nicolaas T - - 2013
Low testosterone, acute and chronic stress and hypercoagulation are all associated with hypertension and hypertension-related diseases. The interaction between these factors and future risk for coronary artery disease in Africans has not been fully elucidated. In this study, associations of testosterone, acute cardiovascular and coagulation stress responses with fibrinogen and ...
Zhao Jingbo - - 2013
Investigation of intestinal motility in a genetic model of GK rats abandons the possible neurotoxic effect of streptozotocin in streptozotocin-induced diabetic model. Seven GK male rats (GK group) and nine normal Wistar rats (Normal group) were used in the study. The motility experiments were carried out in an organ bath ...
Li Faith C H - - 2013
As the most widely used pesticides in the world, fatal incidence of suicidal poisoning by organophosphate compounds is high and is often associated with cardiovascular toxicity. Using the pesticide mevinphos as our tool, we investigated the roles of oxidative stress and nitrosative stress at the rostral ventrolateral medulla (RVLM), the ...
Nagura Kazuhiko - - 2013
Luminescent mechanochromism has been intensively studied in the past few years. However, the difference in the anisotropic grinding and the isotropic compression is not clearly distinguished in many cases in spite of the importance of this discrimination for the application of such mechanochromic materials. We now report the distinct luminescent ...
Terragni Pier Paolo - - 2013
Guidelines suggest a plateau pressure (PPLAT) of 30 cm H2O or less for patients with acute respiratory distress syndrome, but ventilation may still be injurious despite adhering to this guideline. The shape of the curve plotting airway pressure versus time (STRESS INDEX) may identify injurious ventilation. The authors assessed accuracy of ...
Kuwana K - - 2013
This paper reports on a grasping forceps with a triaxial Micro Electro Mechanical Systems (MEMS) tactile sensor on a tip. The laparoscopic surgery is minimally invasive because the incisions are smaller than the open surgery. This results in fast recovery. However, it is a problem in the laparoscopic surgery to ...
Hartkamp Remco - - 2013
Non-equilibrium molecular dynamics simulations of an atomic fluid under shear flow, planar elongational flow, and a combination of shear and elongational flow are unified consistently with a tensorial model over a wide range of strain rates. A model is presented that predicts the pressure tensor for a non-Newtonian bulk fluid ...
Marañon Rodrigo O - - 2013
Abstract Background/Aim: Renal preglomerular vessels play a central role in modulating renal function and injury, especially during conditions of renal hemodynamic stress such as hypertension. We evaluated whether improving the balance between nitric oxide (NO) and oxidative stress improves the morphological alterations of renal afferent arterioles that occur in NO ...
Qiu Gang - - 2013
In order to study the influence of settlement under gas pressure in bioreactor landfill, the landfill is simplified as a one-way gas seepage field, combining Darcy's Law, the gas equation of state, and the principle of effective stress and fluid dynamics of porous media theory. First assume that the bioreactor ...
Breuner Creagh W - - 2013
Severe storms can pose a grave challenge to the temperature and energy homeostasis of small endothermic vertebrates. Storms are accompanied by lower temperatures and wind, increasing metabolic expenditure, and can inhibit foraging, thereby limiting energy intake. To avoid these potential problems, most endotherms have mechanisms for offsetting the energetic risks ...
Williamson Rachel - - 2013
Underpads and layers of linens are frequently placed under patients who are incontinent, have other moisture-related issues, and/or are immobile and cannot reposition independently. Many of these patients are also at risk for pressure ulcers and placed on pressure-redistribution surfaces. The purpose of this study was to measure the effects ...
Rotundu C R - - 2013
Diamond anvil cell techniques are now well established and powerful methods for measuring materials properties to very high pressure. However, high pressure resistivity measurements are challenging because the electrical contacts attached to the sample have to survive to extreme stress conditions. Until recently, experiments in a diamond anvil cell were ...
Wetherell Mark A - - 2013
A variety of techniques exist for eliciting acute psychological stress in the laboratory; however, they vary in terms of their ease of use, reliability to elicit consistent responses and the extent to which they represent the stressors encountered in everyday life. There is, therefore, a need to develop simple laboratory ...
Gildea John J - - 2013
OBJECTIVES: To investigate microRNAs (miRNAs) in urinary exosomes and their association with an individual's blood pressure response to dietary salt intake. DESIGN AND METHODS: Human urinary exosomal miRNome was examined by microarray. RESULTS: Of 1898 probes tested, 194 miRNAs were found in all subjects tested. 45 miRNAs had significant associations ...
Wang Yi - - 2013
Stress has been proved to acidulate amphoteric molecules and promote an intermolecular proton transfer, which results in a significant absorption and emission change. The stress acidulated amphoteric molecules open a new avenue for developing mechanochromic materials and anticipate many broad applications such as stress/pressure sensors and rewritable media.
- - 2013
Reports an error in "Mindfulness-Based Stress Reduction and Physiological Activity During Acute Stress: A Randomized Controlled Trial" by Ivan Nyklíček, Paula M. C. Mommersteeg, Sylvia Van Beugen, Christian Ramakers and Geert J. Van Boxtel (Health Psychology, Advanced Online Publication, Mar 25, 2013, np). An incorrect reference was mistakenly provided in ...
Bobrovskaya Larisa - - 2013
The principal aim of this study was to determine whether prolonged chronic footshock stress can evoke sustained changes in blood pressure in rats and to elucidate possible underlying neurochemical mechanisms as mediated by the sympathoadrenal system. Adult male Wistar rats instrumented for telemetric recording of arterial pressure, heart rate and ...
Wittmer J P - - 2013
Comparing isotropic solids and fluids at either imposed volume or pressure, we investigate various correlations of the instantaneous pressure and its ideal and excess contributions. Focusing on the compression modulus K, it is emphasized that the stress fluctuation representation of the elastic moduli may be obtained directly (without a microscopic ...
Wainwright Nicholas Wj - - 2013
BACKGROUND: Psychosocial stress is a risk factor for hypertension and has been shown to affect response to treatment for psychiatric illnesses. PURPOSE: We investigate the relationship between a history of social adversity experience and blood pressure control following antihypertensive medication use. METHODS: A total of 1,186 participants selected from the ...
Sari Yunita - - 2013
Deep tissue injuries (DTIs) can become significant problems because of their rapid deterioration into deep pressure ulcers. Presently, no animal model of DTI deterioration has been developed. By concentrating pressure and shear stress in deep tissues while minimising pressure and shear stress in the overlying skin, we produced an effective ...
Tian Lian - - 2013
Large conduit arteries are not purely elastic, but viscoelastic, which affects not only the mechanical behavior but also the ventricular afterload. Different hysteresis loops such as pressure-diameter, pressure-luminal cross-sectional area (LCSA), and stress-strain have been used to estimate damping capacity, which is associated with the ratio of the dissipated energy ...
Lee Jeffrey H JH Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Boston, MA, - - 2013
Fat grafting has become routine in plastic surgery because of low donor-site morbidity, a low complication rate, and fast recovery time. The optimal technique, however, has yet to be defined. Two critical variables are pressure and shear, both defined as force divided by area. In this study, the authors examined ...
Li Xin - - 2013
BACKGROUND: Although some studies mainly from Taiwan, Bangladesh and the United States, have suggested a consistent dose--response increase in the prevalence of hypertension with increasing arsenic exposure, the association between chronic environmental arsenic exposure and the risk of hypertension is still inconclusive. Most of the studies discussed the association from ...
Thubert Thibault - - 2013
OBJECTIVES: To assess the predictive value of a simple clinical test (posterior vaginal wall pull down maneuver) in the diagnosis of intrinsic sphincter deficiency. METHODS: The present prospective study included 62 women suffering from stress urinary incontinence. Every patient underwent a urogynecological examination including multichannel urodynamic testing (cystometry, urethral pressure ...
van Asselt Els - - 2013
Stress urinary incontinence, defined as involuntary loss of urine secondary to an increase in abdominal pressure, represents one of the most significant urological problems. Several animal models to simulate stress urinary incontinence have been presented, including methods to quantify leak point pressure. We have modified an existing leak point pressure ...
Bertulat S - - 2013
Sudden dry-off is an established management practice in the dairy industry. But milk yield has been increasing continuously during the last decades. There is no information whether the dry-off procedure, which often results in swollen and firm udders, causes stress, particularly in high-producing dairy cows. Therefore, we evaluated the effect ...
1 2 3 4 5 6 7 8 9 10 >