158,691 results match your criteria low pressure

An Analysis of Frequency of Continuous Blood Pressure Variation and Haemodynamic Responses during Haemodialysis.

Blood Purif 2021 Jul 22:1-15. Epub 2021 Jul 22.

Centre for Kidney Research and Innovation, Academic unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom.

Background: Higher beat-to-beat blood pressure (BP) variation during haemodialysis (HD) has been shown to be associated with elevated cardiac damage markers and white matter ischaemic changes in the brain suggesting relevance to end-organ perfusion. We aimed to characterize individual patterns of BP variation and associated haemodynamic responses to HD.

Methods: Fifty participants underwent continuous non-invasive haemodynamic monitoring during HD and BP variation were assessed using extrema point (EP) frequency analysis. Read More

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Thermodynamic Anomalies in Silicon and the Relationship to the Phase Diagram.

J Phys Condens Matter 2021 Jul 22. Epub 2021 Jul 22.

Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, OXFORD, OX1 3QZ, Oxford, OX13QZ, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.

The evolution of thermodynamic anomalies are investigated in the pressure-temperature (pT) plane for silicon using the well-established Stillinger-Weber potential. Anomalies are observed in the density, compressibility and heat capacity. The relationships between these anomalies and between the anomalies and the liquid stability limit are investigated and related to the known ther- modynamic constraints. Read More

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A Low-Sodium DASH Dietary Pattern Affects Serum Markers of Inflammation and Mineral Metabolism in Adults with Elevated Blood Pressure.

J Nutr 2021 Jul 22. Epub 2021 Jul 22.

Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins University, Baltimore, MD, USA.

Background: The blood pressure-lowering effects of the Dietary Approaches to Stop Hypertension (DASH) dietary pattern and reduced sodium intake are well established. The effects on other biomarkers related to vascular health are of interest and might assist in explaining the effects of the DASH diet and sodium reduction.

Objectives: We hypothesized that a low-sodium DASH diet improves (lowers) biomarkers of inflammation [C-reactive protein (CRP) and soluble urokinase plasminogen activator receptor (suPAR)] and mineral metabolism [phosphorus and fibroblast growth factor-23 (FGF23)]. Read More

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Low-Power Laser Ignition of an Antenna-Type Secondary Energetic Copper Complex: Synthesis, Characterization, Evaluation, and Ignition Mechanism Studies.

Inorg Chem 2021 Jul 22. Epub 2021 Jul 22.

Department of Chemistry, Ludwig Maximilian University Munich, München 81377, Germany.

In recent years, development of new energetic compounds and formulations, suitable for ignition with relatively low-power lasers, is a highly active and competitive field of research. The main goal of these efforts is focused on achieving and providing much safer solutions for various detonator and initiator systems. In this work, we prepared, characterized, and studied thermal and ignition properties of a new laser-ignitable compound, based on the 5,6-bis(ethylnitroamino)-'2,'3-dihydroxypyrazine-2,3-bis(carboximidamide) (DS3) proligand. Read More

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Randomised clinical trials of patients with acute myocardial infarction-related cardiogenic shock: a systematic review of used cardiogenic shock definitions and outcomes.

Kardiol Pol 2021 Jul 22. Epub 2021 Jul 22.

Department of Cardiology Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.

Background: Cardiogenic shock (CS) is a critical complication to acute myocardial infarction (AMI), with short-term mortality rates exceeding 40%. However, no international consensus of a CS definition exists. This may compromise interstudy comparability. Read More

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Impacts of caffeine on resistant chicken's performance and cardiovascular gene expression.

J Anim Physiol Anim Nutr (Berl) 2021 Jul 22. Epub 2021 Jul 22.

Niewold Consultancy, Bierbeek, Belgium.

We previously reported a study on 288 broiler (Gallus gallus) chicks who received caffeine in water between days 3 and 42, at levels of 0, 6.25, 12.5, 25, 50 and 100 mg/kg body weight (BW)/day. Read More

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Anthropometric measures and blood pressure of Greenlandic preschool children.

Int J Circumpolar Health 2021 Dec;80(1):1954382

Center for Arctic Health and Molecular Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark.

The study aims to describe anthropometric data of Greenlandic preschool children, blood pressure (BP) measures and effects of maternal smoking during pregnancy in a follow-up of the ACCEPT birth cohort. The study included 102 children (55 boys and 47 girls) aged 3.5-5. Read More

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December 2021

Favorable Pregnancy Outcomes in Women With Well-Controlled Pulmonary Arterial Hypertension.

Front Med (Lausanne) 2021 5;8:689764. Epub 2021 Jul 5.

Department of Pulmonology, University Hospital Zurich, Zurich, Switzerland.

Since pregnancy in women with pulmonary arterial hypertension (PAH) is associated with a high risk of morbidity and mortality, it is recommended that pregnancy should be avoided in PAH. However, some women with mild PAH may consider this recommendation as unsuitable. Unfortunately knowledge on pregnancy outcomes and best management of PAH during pregnancy is limited. Read More

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Comparison of the effects of 2 ventilatory strategies using tidal volumes of 6 and 8 ml/kg on pulmonary shunt and alveolar dead space volume in upper abdominal cancers surgery.

Med J Islam Repub Iran 2021 19;35:79. Epub 2021 Jun 19.

Lung Disease Research Center, Department of Anesthesiology, Mashhad University of Medical Sciences, Mashhad, Iran.

High tidal volume leads to inflammation, and low tidal volume leads to atelectasia and hypoxemia. This study was conducted to compare the effect of 6 mL/kg with positive end-expiratory pressure (PEEP) and 8 mL/kg without PEEP on pulmonary shunt and dead space volume. This clinical trial was done on 36 patients aged 20 to 65 years old with ASA I-II. Read More

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Unusually Warm Summer Temperatures Exacerbate Population and Plant Level Response of to Anthropogenic Nutrient Stress.

Front Plant Sci 2021 5;12:662682. Epub 2021 Jul 5.

Leibniz Centre for Tropical Marine Research (ZMT) GmbH, Bremen, Germany.

is a key foundation species in the Mediterranean providing valuable ecosystem services. However, this species is particularly vulnerable towards high coastal nutrient inputs and the rising frequency of intense summer heat waves, but their combined effect has received little attention so far. Here, we investigated the effects of nutrient addition during an unusually warm summer over a 4-month period, comparing different morphological, physiological and biochemical population metrics of seagrass meadows growing in protected areas (Ischia) with meadows already exposed to significant anthropogenic pressure (Baia - Gulf of Pozzuoli). Read More

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Death Zone Weather Extremes Mountaineers Have Experienced in Successful Ascents.

Front Physiol 2021 5;12:696335. Epub 2021 Jul 5.

Department of Nutritional Biochemistry, Faculty of Health Sciences, Medical University of Gdańsk, Gdańsk, Poland.

Background: Few data are available on mountaineers' survival prospects in extreme weather above 8000 m (the Death Zone). We aimed to assess Death Zone weather extremes experienced in climbing-season ascents of Everest and K2, all winter ascents of 8000 m peaks (8K) in the Himalayas and Karakoram, environmental records of human survival, and weather extremes experienced with and without oxygen support.

Materials And Methods: We analyzed 528 ascents of 8K peaks: 423 non-winter ascents without supplemental oxygen (Everest-210, K2-213), 76 ascents in winter without oxygen, and 29 in winter with oxygen. Read More

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Sex -Specific Differences in the Association Between Metabolic Syndrome and Carotid Intima-Media Thickness Among a Low-Income Population in China: A Cross-Sectional Study.

Diabetes Metab Syndr Obes 2021 15;14:3263-3272. Epub 2021 Jul 15.

Department of Neurology, Tianjin Medical University General Hospital, Tianjin, 300052, People's Republic of China.

Introduction: Carotid atherosclerosis is a well-established biomarker associated with future cardiovascular disease and stroke. We explored the influence of sex on the relationship between metabolic syndrome (MetS) and its components with carotid intima-media thickness (CIMT) among a low-income population in China, which has a high incidence of stroke.

Methods: This population-based study recruited participants aged ≥45 years from rural areas of Tianjin, China between April 2014 and January 2015. Read More

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Retrospective study of glycemic variability, BMI, and blood pressure in diabetes patients in the Digital Twin Precision Treatment Program.

Sci Rep 2021 Jul 21;11(1):14892. Epub 2021 Jul 21.

Twin Health, Mountain View, CA, USA.

The objective of this retrospective observational cohort study was to measure glycemic variability and reductions in body mass index (BMI), blood pressure (BP), and use of antihypertensive medications in type 2 diabetes (T2D) patients participating in the digital twin-enabled Twin Precision Treatment (TPT) Program. Study participants included 19 females and 45 males with T2D who chose to participate in the TPT Program and adhered to program protocols. Nine additional enrollees were excluded due to major program non-adherence. Read More

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Physical properties of UHT light cream: impact of the high-pressure homogenization and addition of hydrocolloids.

J Dairy Res 2021 Jul 22:1-8. Epub 2021 Jul 22.

Pharmaceutical Sciences Department, Federal University of Juiz de Fora, Minas Gerais, Brazil.

The beneficial effects of a healthy diet on the quality of life have prompted the food industry to develop low-fat variants, but fat content directly affects the physicochemical and sensory properties of food products. The utilization of high-pressure homogenization (HP) and incorporation of hydrocolloids have been suggested as strategies to improve the physical stability and rheological properties of light cream. Thus, this study aims to analyze the associated effect of high-pressure homogenization (80 MPa) and three different hydrocolloids: microcrystalline cellulose, locust bean gum and xanthan gum, on emulsion stability and rheological properties of ultra-high-temperature (UHT) light cream (ULC) with a 15% w/w fat content. Read More

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The Korean Hypertension Cohort study: design and baseline characteristics.

Korean J Intern Med 2021 Jul 22. Epub 2021 Jul 22.

National Evidence-based Healthcare Collaborating Agency (NECA), Seoul, Korea.

Background/aims: Hypertension (HT) has a significant impact on public health and medical expenses. However, HT is a chronic disease that requires the long-term follow-up of a large number of patients.

Methods: The Korean Hypertension Cohort (KHC) study aimed to develop a model for calculating cardiovascular risk in HT patients by linking and utilizing the detailed clinical and longitudinal data from hospitals and the national health insurance claim database, respectively. Read More

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Structural, electronic and magnetic properties of TlFeSeunder high pressure.

J Phys Condens Matter 2021 Jul 21. Epub 2021 Jul 21.

Institute of Solid State Physics Chinese Academy of Sciences, 350 Shushanhu Road, Hefei, 230031, CHINA.

The high-pressure properties of TlFeSeare investigated based on the first-principles calculations combined with structure-searching method. The low-pressurephase will transform into the orthorhombicphase at 2 GPa, with 8% volume collapse, the insulator-metal transition and the bicollinear antiferromagnetic-to-nonmagnetic spin-crossover. At pressure higher than 8 GPa, the high-pressurephase will become the ground state. Read More

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Molecular Mechanisms Involved in Intrarenal Renin-Angiotensin and Alternative Pathways in Diabetic Nephropathy - A Review.

Rev Diabet Stud 2021 10;17(1):1-10. Epub 2021 May 10.

Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran.

Uncontrolled or chronic hyperglycemia causes kidney failure induced by the dysfunction of biomolecules and upregulation of inflammatory cytokines and growth factors. The renin-angiotensin system (RAS) is incorporated in the regulation of renal hemodynamics. In a healthy state, local RAS is independent of systemic RAS. Read More

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N Gas Adsorption Sites of Single-Walled Carbon Nanotube Bundles: Identifying Interstitial Channels at Very Low Relative Pressure.

Langmuir 2021 Jul 21. Epub 2021 Jul 21.

CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.

Utilizing the nanoscale space created by carbon nanotubes (CNTs) is of importance for applications like energy storage devices, sensors, and functional materials. Gas adsorption is a versatile, quantitative characterization method to analyze nanoscale pore sizes and volumes. Here, we inspected N adsorption to the nanospace formed by the bundles of single-walled CNTs with an average nanotube diameter of ca. Read More

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Propane-Trapping Ultramicroporous Metal-Organic Framework in the Low-Pressure Area toward the Purification of Propylene.

ACS Appl Mater Interfaces 2021 Jul 21. Epub 2021 Jul 21.

School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China.

The propane (CH)-trapping adsorption behavior is considered as a potential performance to directly produce high-purity propylene (CH). Herein, we report an ultramicroporous Mn-based metal-organic framework () with a reverse CH-selective behavior in the low-pressure area. The pore structure of this material possesses more electronegative aromatic benzene rings for the stronger binding affinity to CH, and the material shows outstanding reverse ideal adsorbed solution theory (IAST) selectivity values. Read More

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Combined association of skeletal muscle mass and grip strength with cardiovascular diseases in patients with type 2 diabetes.

J Diabetes 2021 Jul 20. Epub 2021 Jul 20.

Department of Internal Medicine, Yonsei University, Wonju College of Medicine, Wonju, Republic of Korea.

Background: Appendicular skeletal muscle mass (ASM) and grip strength (GS) have been suggested to be related to cardiovascular diseases (CVDs), but their association with type 2 diabetes (T2D) remains unclear. Therefore, we examined the combined association of ASM and GS with the prevalence of CVD in patients with T2D.

Methods: A total of 1,230 patients with T2D were recruited and divided into four groups based on the sex-specific median values of ASM/body mass index (SM) and GS: high SM/high GS (HSM/HGS), high SM/low GS (HSM/LGS), low SM/high GS (LSM/HGS), and low SM/low GS (LSM/LGS). Read More

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Transcutaneous electrical stimulation in neck pain: a systematic review and meta-analysis.

Eur J Pain 2021 Jul 20. Epub 2021 Jul 20.

Department of Physical Therapy, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, Brazil.

Background And Objective: The objective of this systematic review was to investigate the effectiveness of electrical stimulation (ES) for neck pain (NP).

Databases And Data Treatment: The databases CINAHL, Embase, MEDLINE (via OVID), PEDro and Web of Science were searched, with no date restrictions. Two independent reviewers selected randomized controlled trials (RCTs) reporting pain, range of motion or psychosocial factors in people with NP, in which ES was applied. Read More

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Azo-Functionalized Zirconium Based Metal-Organic Polyhedron as an Efficient Catalyst for CO2 Fixation with Epoxides.

Chemistry 2021 Jul 19. Epub 2021 Jul 19.

Dongguan University of Technology, Department School of Environment and Civil Engineering, CHINA.

Chemical fixation of CO 2 as C1 source at ambient temperature and low pressure is an energy-saving way to make use of the green-house gas, but it still remains a challenge since efficient catalyst with high catalytic active sites is required. Here a novel monoclinic azo-functionalized Zr based metal organic polyhedron (Zr-AZDA) has been prepared and applied in CO 2 fixation with epoxides. The inherent azo groups not only endow Zr-AZDA with good solubilization, but also act as basic sites to enrich CO 2 showing efficient synergistic catalysis as confirmed by TPD-CO 2 analysis. Read More

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The Effect of Ocular Perfusion Pressure on Retinal Thickness in Young People with Presumed Systemic Hypotension.

Vision (Basel) 2021 Jul 14;5(3). Epub 2021 Jul 14.

Alvin Jeffrey Munsamy, Room E5-642, Discipline of Optometry, 6th Floor, E Block, Westville Campus, University Road, Westville, Durban 3629, South Africa.

Low ocular perfusion pressure (OPP) may increase the risk of optic neuropathy. This study investigated the effects of OPP on the ganglion cell complex (GCC) and optic nerve head-retinal nerve fibre layer (ONH-RNFL) thickness in presumed systemic hypotensives (PSH). Fifteen participants with PSH and 14 controls underwent automated sphygmomanometry and Icare tonometry to calculate OPP: mean OPP (MOPP), systolic OPP (SOPP), and diastolic OPP (DOPP). Read More

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Intensive voice treatment (the Lee Silverman Voice Treatment [LSVTLOUD]) for individuals with Wilson's disease and adult cerebral palsy: two case reports.

Logoped Phoniatr Vocol 2021 Jul 21:1-9. Epub 2021 Jul 21.

Department of Speech and Language Therapy, Faculty of Health Science, Anadolu University, Eskişehir, Turkey.

In this case report, we aimed to examine the effects of an intensive voice treatment (the Lee Silverman Voice Treatment [LSVTLOUD]) for Wilson's disease (WD), and adult cerebral palsy (CP), and dysarthria. The participants received LSVTLOUD four times a week for 4 weeks. Acoustic, perceptual (GRBAS) analyses were performed and data from the Voice Handicap Index (VHI) were obtained before and after treatment. Read More

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Signal-averaged resting sympathetic transduction of blood pressure: is it time to account for prevailing muscle sympathetic burst frequency?

Am J Physiol Regul Integr Comp Physiol 2021 07 21. Epub 2021 Jul 21.

Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.

Calculating the blood pressure (BP) response to a burst of muscle sympathetic nerve activity (MSNA), termed sympathetic transduction, may be influenced by an individual's resting burst frequency. We examined the relationships between sympathetic transduction and MSNA in 107 healthy males and females and developed a normalized sympathetic transduction metric to incorporate resting MSNA. Burst-triggered signal-averaging was used to calculate the peak diastolic BP response following each MSNA burst (sympathetic transduction of BP) and following incorporation of MSNA burst cluster patterns and amplitudes (sympathetic transduction slope). Read More

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Delayed cytokine release syndrome after neoadjuvant nivolumab: a case report and literature review.

Immunotherapy 2021 Jul 21. Epub 2021 Jul 21.

Rutgers Cancer Institute of New Jersey, New Brunswick, NJ 08903, USA.

Cytokine release syndrome (CRS) is an infrequently described immune-related adverse event of checkpoint inhibitors (CPI). CPI-induced CRS typically presents with fevers, hemodynamic instability and organ dysfunction within 2 weeks of the last treatment cycle. We report an unusual case of delayed and severe CRS occurring postoperatively in a patient with hepatic-limited metastatic colorectal cancer who received neoadjuvant immunotherapy. Read More

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Confined Chemical Transitions for Direct Extraction of Conductive Cellulose Nanofibers with Graphitized Carbon Shell at Low Temperature and Pressure.

J Am Chem Soc 2021 Jul 21. Epub 2021 Jul 21.

National Engineering Lab for Textile Fiber Materials & Processing Technology, College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.

Cellulose is the most abundant renewable natural polymer on earth, but it does not conduct electricity, which limits its application expansion. The existing methods of making cellulose conductive are combined with another conductive material or high-temperature/high-pressure carbonization of the cellulose itself, while in the traditional method of sulfuric acid hydrolysis to extract nanocellulose, it is usually believed that a too high temperature will destroy cellulose and lead to experimental failure. Now, based on a new research perspective, by controlling the continuous reaction process and isolating oxygen, we directly extracted intrinsically conductive cellulose nanofiber (CNF) from biomass, where the confined range molecular chains of CNF were converted to highly graphitized carbon at only 90 °C and atmospheric pressure, while large-scale twisted graphene films can be synthesized bottom-up from CNFene suspensions, called CNFene (cellulose nanofiber-graphene). Read More

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Magnetic anisotropy on demand exploiting high-pressure as remote control: an proof of concept.

Dalton Trans 2021 Jul 20. Epub 2021 Jul 20.

Department of Chemistry "U. Schiff" and INSTM UdR Firenze, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.

Lanthanide based single molecule magnets have recently become very promising systems for creating single molecule devices working at high temperatures (nitrogen boiling temperature). However, the variation of the direction of the anisotropy tensor as a function of the applied pressure still represents a quite unexplored field. Application of external pressure can be a promising method toward neat control of magnetic anisotropy and relaxation processes in the bulk phase. Read More

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Structure and thermodynamics of empty clathrate hydrates below the freezing point of water.

Phys Chem Chem Phys 2021 Jul 21. Epub 2021 Jul 21.

LAQV-REQUIMTE, Department of Chemistry, Faculdade de Ciências e Tecnologia, NOVA University Lisbon, 2829-516 Caparica, Portugal.

Recently prepared as a new H2O phase, ice XVI was obtained by degassing a Ne-sII clathrate hydrate under vacuum, however very little is known of that crystalline solid under temperatures (T ≤ 220 K) and pressures (p ≤ 5000 bar) relevant for the Earth's environment and geochemistry. In this work, atomically detailed calculations using long time-scale molecular simulations, seldom paralelled before, are employed to probe empty sII clathrate hydrates. It is found that the volumetric response to an applied pressure-temperature gradient is accurately described by the Parsafar and Mason equation of state with an accuracy of at least 99. Read More

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Effects of high- vs low-dose native vitamin D on albuminuria and the renin-angiotensin-aldosterone system: a randomized pilot study.

Int Urol Nephrol 2021 Jul 20. Epub 2021 Jul 20.

Department of Nephrology, Hôpitaux Universitaires de Strasbourg 1, Place de L'Hôpital, 67000, Strasbourg, France.

Background: Residual albuminuria is associated with an increased risk of progression to ESKD. We tested whether a supplementation with native vitamin D could reduce albuminuria in stable CKD patients under maximal renin-angiotensin system (RAS) blockade.

Methods: We conducted a randomized controlled study of high (cholecalciferol 100 000 UI per 10 days over 1 month) vs low-dose (ergocalciferol 400 UI/days over 1 month) supplementation with native vitamin D on urinary albumin/creatinine ratio, blood pressure and the RAS over 1 month in stable CKD patients with albuminuria and maximum tolerated RAS blockade. Read More

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