Sentences with phrase «oxygen pressure at»

The team's original hope was that it would be possible to simply change the temperature or oxygen pressure at which the ITO film was deposited to achieve the desired optoelectronic and surface roughness properties.

Not exact matches

Controlled breathing stabilizes blood pressure and increases oxygen flow, thereby increasing alertness, reports Pooja Biraia at medimanage.com.

The problem isn't the percentage of oxygen in the air, which stays relatively constant at about 21 % until about 70,000 feet — it's the lack of air pressure.

Bacteria thrive virtually everywhere on Earth — from sub-zero temperatures to over 750 degrees F (in hydrothermal vents at the bottom of the ocean), and in widely varying oxygen, pressure and nutrient conditions.

I reread the chart: pulse 114 (a tad high), fever 100.4, good blood pressure and oxygen saturation near normal at 96 percent.

The researchers also found that at high pressures, oxygen atoms are much more compressible than silicon atoms.

In an article published today in the Proceedings of the National Academy of Sciences titled «Solar photothermochemical alkane reverse combustion,» the researchers demonstrate that the one - step conversion of carbon dioxide and water into liquid hydrocarbons and oxygen can be achieved in a photothermochemical flow reactor operating at 180 to 200 C and pressures up to 6 atmospheres.

HBOT involves breathing 100 percent oxygen at elevated barometric pressure, saturating the tumors with oxygen.

While lying in a cylindrical chamber, patients breathe in 100 percent oxygen (normal air is about 21 percent oxygen) at 2 to 3 times regular atmospheric pressure, for at least an hour.

A team led by Thomas Muehlemann at University Hospital Zurich in Switzerland has used it to see how oxygen keeps pilots conscious when cabin pressure drops.

The treatments, administered at the Institute of Hyperbaric Medicine at Assaf Harofeh Medical Center, headed by Dr. Efrati, consisted of 40 one - hour sessions, administered five times a week over two months, in a high pressure chamber, breathing 100 % oxygen and experiencing a pressure of 1.5 atmospheres, the pressure experienced when diving under water to a depth of 5 meters.

The increase in density, and a corresponding increase in stiffness of the molten material, results because the high pressure found deep within the planet would have forced each silicon atom to have six oxygen neighbors, not the four neighbors typically found at lower pressures.

Burning gasified coal in pure oxygen at high pressure concentrates the carbon dioxide, making it far easier to capture.

Nitrogen oxides (NOx)-- Generated when nitrogen in the air reacts with oxygen at the high temperature and pressure inside the engine.

This shift saves more oxygen for the brain and heart, but to a degree it also seems to fortify the torso against the crushing effects of water pressure at great depth.

At issue is the $ 20 million, 23 - institution SUPPORT (Surfactant, Positive Pressure, and Oxygenation Randomized Trial) study, which from 2005 to 2009 studied the levels of oxygen that premature infants should receive.

«At normal atmospheric pressure and temperature, where air is 21 percent O2, the material already contains oxygen and can not absorb more,» McKenzie explains.

At this altitude, a total loss of cabin pressure would cause the temperature inside the plane to drop dramatically, to between -40 °C and -60 °C, and the air would rapidly become unbreathable as oxygen levels suddenly dropped.

The 90 - minute treatments exposed patients to pure oxygen at two times the atmospheric pressure.

Choi and Cha, however, developed an efficient electrochemical method to oxidize HMF to FDCA at room temperature and ambient pressure using water as the oxygen source.

For this work, he has used a number of ultra-high vacuum surface science techniques to, for example, identify and explain several very unusual mechanistic features of the heterogeneous chemistry occurring in a catalytic converter including: a) the dramatically different CO oxidation reaction mechanism on ruthenium metal relative to other late transition metals; b) the structure sensitive selectivity of the NO reduction reaction on rhodium metal; c) deactivation of rhodium metal at high oxygen partial pressures; and d) the significantly different CO oxidation reaction mechanism over oxidized rhodium metal.

Conventional biomass conversion processes use high - pressure oxygen for the conversion of HMF to FDCA at high temperatures.

At altitudes of 5000 m and higher, life is not easy here: the atmospheric pressure is much lower than at sea level, and oxygen is scarcAt altitudes of 5000 m and higher, life is not easy here: the atmospheric pressure is much lower than at sea level, and oxygen is scarcat sea level, and oxygen is scarce.

At low pressure, carbon bonds to three oxygen atoms, while silicon bonds to four.

With the combination of in situ synchrotron infrared spectroscopic measurements carried out at high pressure, and ab initio calculations on the ferromagnesite structure, it was possible to identify a unique vibrational signature present only in the high - pressure phase, and thus a new carbon - oxygen bond forms in ferromagnesite under pressure.

They cause higher blood pressure and more difficulty delivering adequate blood and oxygen to our body, putting us at risk for heart attack, stroke, organ failure and more.

Just like electrolyte balance needs to be maintained, the amount of sodium in our body also needs to be regulated to keep our blood pressure at just the right spot: Too high and it can increase our risk for heart disease, too low and we can feel faint since oxygen isn't getting to our cells quickly enough.

When add in a environment like the top of Everest where the atmospheric pressure and inspired oxygen pressure fall roughly... 30 % of the sea level value at 8900 m which is the height of the summit of Everest.

Injections of ozone and oxygen can shrink a disc that's bulging out and putting pressure on surrounding nerves and tissue, according to Kieran Murphy, MD, who presented data on the technique at the Society of Interventional Radiology meeting in Chicago.

So will the oxygen ionize at the end of the compression stroke before ignition or only once the pressure starts to rise with the combustion flame front?

At the W.M. Keck Observatory on the very high altitude summit of Mauna Kea, there was no routine monitoring of mental functioning, blood oxygen levels, blood pressure or heart rate of workers.

At a minimum, every patient is monitored for heart rhythm, pulse rate, breath rate, temperature, blood pressure, oxygen saturation and carbon dioxide production.

All pets undergoing surgery at Animal Clinic of North Topeka are carefully watched and have their blood pressure, heart rate, rhythm, and blood oxygen levels monitored by a specially designated veterinary technician and state of the art equipment.

With hyperbaric therapy, a patient is placed in the chamber and inhales 100 % oxygen at pressures greater than sea level.

Hyperbaric Oxygen Therapy, or HBOT, works by providing 100 % oxygen (nearly 5x that available in room air,) at approximately twice the atmospheric preOxygen Therapy, or HBOT, works by providing 100 % oxygen (nearly 5x that available in room air,) at approximately twice the atmospheric preoxygen (nearly 5x that available in room air,) at approximately twice the atmospheric pressure.

Anesthetized dogs and cats at the AMC are connected to various monitoring equipment to measure the vital signs such as pulse rate, blood oxygen levels, blood pressure, electrocardiogram, and carbon dioxide levels.

Learn how to recognise and handle potential problems particular to diving with Enriched air, such as Oxygen Toxicity, and also determining your maximum Oxygen Partial Pressures at depth and how to use them to plan your dives maximum dive times and depths.

The percentage of oxygen in air remains essentially constant with altitude at 21 % up until 70,000 feet (21,330 m), but the air pressure (and therefore the number of oxygen molecules) drops as altitude increases — consequently, the available amount of oxygen to sustain mental and physical alertness decreases above 10,000 feet (3,050 m).

Altitude sickness, also known as acute mountain sickness (AMS), altitude illness, hypobaropathy, or Soroche, is a pathological effect of high altitude on humans, caused by acute exposure to low partial pressure of oxygen at high altitude.

CO2 forms carbonic acid with water and becomes supercritical fluid at pressure, and both will dissolove toxic chemicals and contaminate aquifers, the largest source of fresh water.Other major flaw is that Futuregen requires very large volumes of oxygen for gasification, which will be extrated from air by separating notrogen from it.

> The concentration of CO2 is the wrong measure for deciding whether it is «tiny», because it compares the amount of CO2 with the amounts of oxygen and nitrogen which don't absorb infra - red at normal pressures.

Quantified preparations of Polybacter spp were then cultivated in laboratory conditions at a constant temperature of 6 °C and a constant pressure of 41 atmospheres and an oxygen content of 2.3 % to simulate averaged conditions in the benthic environment (Ragnsdottir 2003).

Has a definitive experiment been completed with oxygen / ozone at rarefied pressures?

(d) The opposite will happen by analogy if the CO2 atmosphere of Venus would be replaced by a nitrogen — oxygen atmosphere at a pressure of 90.9 atm.

So, «For example, air at sea level, and saturated with water vapor at 20 °C, has partial pressures of about 23 mbar of water, 780 mbar of nitrogen, 210 mbar of oxygen and 9 mbar of argon.»

Nitrogen oxides are formed when oxygen and nitrogen come together at high pressure and temperature found in the internal combustion engine.

For example, air at sea level, and saturated with water vapor at 20 °C, has partial pressures of about 23 mbar of water, 780 mbar of nitrogen, 210 mbar of oxygen and 9 mbar of argon.»

when an organic compound methane reacts with oxygen they produces carbon dia oxyide and the hydrogen gas which is harmful for humman biengs carbon dia oxyide is used in our drinks like pepsi and it is soulible in water at heavey pressure and hydrogen is used as fuel and the equatoin becomes ch4 + h2 ---- > co2 +2 h2

Main Outcome Measures At age 32 years, study members were assessed for the presence of 3 age - related - disease risks: major depression, high inflammation levels (high - sensitivity C - reactive protein level > 3 mg / L), and the clustering of metabolic risk biomarkers (overweight, high blood pressure, high total cholesterol, low high - density lipoprotein cholesterol, high glycated hemoglobin, and low maximum oxygen consumption levels.