Sentences with phrase «at higher oxygen»

The UCLA researchers choose instead to grow theirs at higher oxygen levels and chop the blobs at the 35 - day mark, when they are as wide as three millimeters, and then about every two weeks after.

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.

Not exact matches

Doctor told Mr Justice MacDonald at the family division of the High Court that the infant suffered catastrophic brain damage when he was deprived of oxygen at birth.

Enveloped in the blue mist of oxygen which its life breathes, it floats at exactly the right distance from the sun to enable the higher chemisms to take place on its surface.

Whisky barrels are scorched at a high heat, which releases their natural wood sugars, while their narrower staves allow for greater oxygen exchange.

In simple terms, the anaerobic system (without oxygen) produces energy at high rates for very short periods (sprinting).

The Sun report that the England international took at least two hits of the legal high — which causes light - headedness by starving the brain of oxygen — alongside two friends, before being shown to be potentially unconscious during the 81 second video.

Premature babies or those that had an infection or required oxygen at birth have a higher risk of developing trouble with their eyes.

Onstott keeps a sealed workspace in his lab at high temperature and free of oxygen — just like home for the bacteria he studies.

People living at high altitude have evolved different ways to cope with low oxygen levels.

«Stalagmites are a very interesting proxy because they can be very well dated and they can also be measured at high resolution to give us oxygen measurements that we can relate to rainfall,» Carolin said.

At high heat, the cladding interacts with the surrounding water vapor, binding tightly to the oxygen and freeing the hydrogen, which escapes as a gas.

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

In places where sea - floor oxygen levels are a bit higher — about 0.5 — 3 % of concentrations at the sea surface — animals are more abundant but their food webs remain limited: the animals still feed on microbes rather than on each other.

The analysis also confirmed other effects of being at high altitudes, such as the increase in hemoglobin to ferry as much oxygen as possible.

The new phosphor — made of the elements strontium, lithium, aluminum and oxygen (a combination dubbed «SLAO»)-- was discovered using a systematic, high - throughput computational approach developed in the lab of Shyue Ping Ong, a nanoengineering professor at the UC San Diego Jacobs School of Engineering and lead principal investigator of the study.

The mechanism, Lewis says, appears to be collisions between CO2 and atomic oxygen at high altitudes.

At high altitudes, the body adapts to the thin air by generating additional red blood cells, which grab more oxygen from the air in the lungs.

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

Along with my colleagues Dave Johnston and Ann Pearson at Harvard and NASA's Felisa Wolfe - Simon, I hypothesize that biological feedback cycles, including one involving sulfide - based photosynthesis, would tend to maintain this world in which oxygen levels remain low and sulfide high [for the next «boring» billion years].

To isolate the effects of oxygen concentration, researchers from the University of Colorado compared the rate of SIDS in infants living at high altitudes, where the air is thin, to those living closer to sea level.

«Urban organics» thus remain at higher levels longer, says Canuel, «delivering more organic material to the river mouth and increasing the likelihood that low - oxygen conditions will develop in downstream locations such as estuaries and the coastal ocean.»

This is thought to be due to higher level of oxygen in the atmosphere at that time.

Professor Andrew Scott, one of the lead authors, said: «High oxygen levels in the atmosphere at this time has been proposed for some time and may be why there were giant insects and arthropods at this time but our research indicates that there was a significant impact on the prevalence and scale of wildfires across the globe and this would have affected not only the ecology of the plants and animals but also their evolution.»

Using spectral readings from telescopes at the Keck Observatory in Hawaii, Hand has found high levels of oxidative chemicals such as sulfate, oxygen, sulfur dioxide and hydrogen peroxide on Europa's surface, which are produced as ionizing radiation from Jupiter scours it, splitting apart water molecules and sulfur compounds in the uppermost layers of its ice.

The reactions can become self - sustaining at high temperatures, if there is sufficient water or oxygen present, causing the cladding tubes to rupture.

But without exposure to oxygen, the researchers found, lithium films could retain deuterium at higher temperatures as a result of lithium - deuterium bonding.

Hydrogen trioxide is stable at low temperatures but begins to decompose slowly at -40 degreesC, forming so - called singlet oxygen, a high - energy form of the gas which can be detected by its reaction with dimethylanthracene.

Similarly, certain mtDNA variants are enriched in Tibetan populations, suggesting that mtDNA variation may permit adaptation to the low oxygen tension at high altitude.

A new study into how the world's highest flying bird, the bar - headed goose, is able to survive at extreme altitudes may have future implications for low oxygen medical conditions in humans.

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.

Twice they observed high fluorescence and reduced dissolved oxygen, indicating a possible plume at 1100 meters depth and 7.5 nautical miles southwest of the wellhead.

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

The volunteers walked for 60 minutes at 60 percent maximum oxygen consumption on an empty stomach and, on another occasion, two hours after consuming a high - calorie carbohydrate - rich breakfast.

Only at high altitude, where there is not enough oxygen, will they need to switch to an on - board supply.

If so, he says, this could lead to new, legal ways to boost red blood cell production in athletes, much like using oxygen tents or training at high altitudes.

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

Also, he notes, if the waters were warm, the turtles» revved - up metabolisms and increased activity would likely have consumed the oxygen in their bloodstream at an exceedingly high rate.

Players in the World Cup soccer tournament, now underway in South Africa, will have to contend with low oxygen levels at high altitude — and with a new ball, which its scientist creators say is the roundest one ever.

Most other known caecilians are burrowing creatures, but Nussbaum believes the new specimen's bizarre features suit it to life at the bottom of cool, high - oxygen mountain streams.

But even if they can make the shift, low - altitude pikas might not be able to cope with the low oxygen of higher altitudes, biologists reported here last week at a meeting of the American Society of Naturalists.

This abundance of oxygen and carbon would have fueled microbes to degrade the charcoal and spheres, eliminating evidence for them higher up in a way that they couldn't at the core's base.

Mothers who live at high altitude, smoke, or develop diabetes during pregnancy can starve their embryos of oxygen.

At the time the pine tree was alive, the world was in a greenhouse, and oxygen levels and temperatures were high — prime conditions for fires.

Now researchers have discovered two new gene variants that help Tibetans use oxygen more efficiently than people who live at low altitudes; natural selection favored these variants in Tibetans, whose ancestors have lived at high altitude for thousands of years.

That helps them avoid serious problems caused by too much hemoglobin, but Tibetans with this so - called decreased hemoglobin phenotype must somehow use small amounts of oxygen efficiently to get enough of it to their limbs while exercising at high altitude.

The next step, he says, is to take the research to the human level, specifically looking at the effect of pregnancy at high altitude — where there's less oxygen in every womb — and heart conditions later in life.

«High - speed flickering at 1/80 seconds could not be explained by oxygen ions alone.

«The fact that this high - speed flickering was observed at the same time as flickering with a typical 1/10 second period may mean that the flickering aurora was caused by «electromagnetic ion cyclotron waves» (* 2), which are affected by both oxygen and hydrogen ions.»