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Showing 1 to 20 of 191 for “"VO2"”.
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Thermodynamic stability of Vo2-Metal thin films
Thermodynamic stability of VO2 in contact with metals was conducted on solid thin metal films. The VO2 film was synthesized on a corning glass under optimized condition parameters using rf magnetron reaction sputtering. The samples with structure glass/VO2 were then taken for optical …
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Building a Low-Cost Portable VO2 Max Mask
Maximal oxygen consumption more commonly known as VO₂ max is the gold standard indicator of cardiorespiratory fitness and a stronger predictor of all-cause mortality than traditional health risk factors such as smoking, diabetes, and hypertension. Despite being recognized as a clinical vital metric …
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Towards stimuli-responsive functional nanocomposites: smart tunable plasmonic nanostructures Au-VO2
… environment of gold nanoparticles embedded in VO2 host matrix would be ideal for the design of responsive functional nanocomposites. We prepared Au-VO2 nanocomposite thin films by the inverted cylindrical reactive magnetron sputtering (ICMS) known as hollow cathode magnetron sputtering for the …
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The Effects of Age and Long-Term Endurance Training on VO2 Kinetics
… of the adjustment of pulmonary oxygen uptake (VO2) was examined during step transitions from 20 W to moderate-intensity cycling in young (Y), middle-aged (M), and older (O) endurance trained and untrained men. VO2p was measured breath-by-breath and changes in deoxygenated hemoglobin ([HHb]) …
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Electronic, thermoelectric and optical properties of vanadium oxides: VO2, V2O3 and V2O5
Correlated electrons in vanadium oxides are responsible for their extreme sensitivity to external stimuli such as pressure, temperature or doping. As a result, several vanadium oxides undergo insulator-to-metal phase transition (IMT) accompanied by structural change. Unlike vanadium pentoxide …
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Improving the Accuracy of the VO2 max Prediction Obtained from Submaxial YMCA Testing
Maximal oxygen uptake (VO2 max) is the best criterion measure for aerobic fitness and the prescription of exercise intensity for programs designed to enhance cardiorespiratory fitness. There are two ways of obtaining VO2 max: maximal tests, which require subjects to exercise to the point of …
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The Effect of Mode and Intensity on Vo2 Kinetics in the Severe Intensity Domain
… to evaluate the effect of mode and intensity on VO2 kinetics in the severe intensity domain. Seventeen participants completed 3-7 tests each on a cycle ergometer and treadmill. For each test, Tfatigue, VO2max, Tmean response, VO2GAIN, TVO2max and T@VO2max were determined. Linear regression …
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Synthesis of Chemically Stable VO2 Particles Using Green Solvents and their Application as Smart Coatings
… thermochromic materials, vanadium dioxide (VO2) is known to display a fully reversible semiconductor-metal transition (SMT). VO2 responds thermochromically to environmental temperature changes by changing its crystal structure as a function of temperature. VO2 is transparent to infrared …
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Ventilatory threshold and peak VO2 responses in prepubescent children following a high intensity training program
The focus of this study was to examine the influence of a high intensity training program on selected cardiovascular exercise responses in a group of prepubescent males. Thirteen healthy boys with a mean age of 10.0 years were randomly assigned to either control or an exercise group. Children in …
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The Effect of Wearing Mouthguards on VO2, Ventilation, and Perceived Exertion at Two Different Exercise Intensities
… ergometer to determine peak oxygen consumption (VO2peak). Each participant also performed 6 submaximal exercise tests while wearing one of two facemasks (nasal or non-nasal breathing) and one of three mouthguard conditions (no mouthguard, boil and bite, custom-fit). Steady-state VO2, rate of …
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The Effects of Short Work Versus Longer Work Periods Within Intermittent Exercise on VO2 Kinetics, Muscle Deoxygenation and Energy System Contribution
The purpose of this study was to investigate the kinetic response of oxygen uptake (V̇O2)and muscle deoxygenation (HHb) in males (24 yr±3, n = 10) to identical heavy intensity continuous (CONT), and intermittent work; 25 s (25 s work: 3 s recovery (20W)), and 10 s (10 s work: 3 s recovery (20W)), …
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Vanadium dioxide thermochromic thin films correlation between microstructure, electrical and optical properties
Thermochromic thin films of vanadium dioxide (VO2) were successfully prepared using two physical vapour deposition methods namely Pulsed Laser Deposition (PLD) and Inverted Cylindrical Magnetron Sputtering (ICMS). We used these two techniques in order to comparatively study the effect of deposition …
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Effect of Nitric Oxide on Oxygen Consumption of Skeletal Muscle
… is a result of the mitochondrial O2 consumption (VO2) NO various effects on the mitochondria: at low concentrations for short periods NO specifically and irreversibly inhibits cytochrome c and reversibly inhibits cytochrome c oxidase, to decrease VO2. Thus, NO can modulate VO2 of skeletal muscle. …
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THE METABOLIC COST OF SLOW GRADED TREADMILL WALKING WITH A WEIGHTED VEST IN UNTRAINED FEMALES
… Purpose: To examine how oxygen consumption (VO2), relative exercise intensity (%APHRM), and rating of perceived exertion (RPE) are affected while using a weighted vest during slow inclined treadmill walking. Methods: Thirteen untrained women (37±11.2 yr, 69.1±14.4 kg, 30.6±7.4 %Body Fat) …
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Sex Differences in the Oxygen Uptake Kinetic Response to Moderate Intensity Exercise in Obese Adolescents
The oxygen uptake (VO2) kinetic response to exercise provides insight into aerobic performance and the efficiency of the body to maintain oxygen demand during the initiation of exercise. Previous research in normal weight children reports insignificant differences in gender VO2 on-kinetic responses …
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Étude approfondie des couches minces de l'oxyde de vanadium et de l'oxyde d'indium: étain fonctionnalisées pour des dispositifs
… des couches minces de dioxyde de vanadium (VO2) ainsi que les propriétés optoélectroniques des couches minces d'oxyde d’indium-étain (ITO) en vue de leur utilisation tandem. Le VO2 est un matériau thermochrome intéressant de la famille des oxydes de métaux de transition (OMT). Il est …
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Stability-reliability and the relationship of an incremental protocol in determining peak VO2 in college-aged men and women on the StairMaster 2650 UE kayak ergometer
Measuring V02peak is an important health assessment used to indicate cardiorespiratory fitness, prescribe exercise, and diagnose heart abnormalities (2,12). Utilizing the muscles of the upper body, the new StairMaster kayak ergometer is ideal for measuring V02peak on people with lower extremity …
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OXYGEN DELIVERY AND CONSUMPTION DURING HYPOTHERMIC OXYGENATED MACHINE PERFUSION AND THEIR IMPACT ON POST-LIVER TRANSPLANT OUTCOME.
… tra apporto (DO2) e consumo di ossigeno (VO2) durante HOPE e valutarne l’impatto sugli esiti dopo trapianto di fegato (LT). Metodi Sono stati analizzati i casi di DHOPE eseguiti presso la nostra Fondazione, suddividendoli in due gruppi in base alla pO2 del perfusato: >600 mmHg (H-DO2) e …
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