Sentences with phrase «oxygen levels at»

Elaborate algorithms are applied to radio signal records to estimate blood oxygen levels at the places from which the signals are calculated to have originated.

Pikes Peak is an unforgiving Hill Climb, spanning 12.42 miles and 156 corners, rising to 4,300 meters above sea level with oxygen levels at the -LSB-...]

Off the coast of West Africa, swirling eddies carry dead zones with remarkably low oxygen levels at shallow depths, according to an international study.

A new study in the Journal of Clinical Sleep Medicine revealed that 44 percent of adults with sickle cell disease who report trouble sleeping actually have a clinical diagnosis of sleep disordered breathing, including sleep apnea, which lowers their oxygen levels at night.

To create hypoxia, they placed pregnant rats in a chamber that kept their oxygen levels at 13 %, rather than the norm of 21 %, for the majority of their pregnancy.

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.

Clarice Fu, then a graduate student at the University of British Columbia in Canada, measured ion and oxygen levels at both ends of the larvae.

What were oxygen levels at that time?

The scans were all marked by ghostly yellow blobs indicating areas of increased blood oxygen levels at the moment of judgment, Cushman explained.

The researchers measured falling oxygen levels at the surface of the sediment coupled with a disappearance of hydrogen sulfide (a food source to bacteria) a few centimeters below.

Not exact matches

Some researchers also think it may be possible to compare the carbon, nitrogen, oxygen, and other chemicals in a plume to «default» levels seen in asteroids, which were formed at the dawn of the solar system — and ask if life is manipulating the chemistry there, or at least did so in the past.

The liquid oxygen tank is probably the hardest piece of this whole vehicle because it's got ta handle propellant at the coldest level, and the tanks themselves actually form the airframe.

In response to Business Insider questions about Southwest's use of oxygen masks on Flight 1380, a company representative said via email: «We aren't ready to engage that level of detail at this time as we are focused on the immediate needs of the NTSB investigation.»

The continued rising levels of imports of foreign steel threaten to impair the national security by placing the U.S. steel industry at substantial risk of displacing the basic oxygen furnace and other steelmaking capacity, and the related supply chain needed to produce steel for critical infrastructure and national defense.

Researchers in parallel studies in Australia, New Zealand, and England looked at the same pooled data and recommended strongly to avoid the low oxygen levels because of this increased mortality.

They need an atmosphere to breathe, which means that the appropriate amount of oxygen and other gases have to be kept at a constant level, despite being constantly used up while carbon dioxide is constantly exhaled from breathing.

This increases blood flow and oxygen intake, while at the same time decreases inflammation, which all helps the body to perform at a more optimal level.

The way Haisley puts it in the above passage assumes not only the benefit of hindsight (which, goddamn dude, take this into account the next time you lose enough oxygen to your brain to think writing about Arsenal is a good idea), but also that his level of production from 2011 - 2012 would continue well into his twilight years at Arsenal.

At nine locations across the lake, he records water temperature, dissolved oxygen, clarity, acidity levels and saline.

Baby Vida's $ 150 oxygen smart monitor ($ 62 at the time of this writing on Amazon.com) measures a baby's oxygen level and heart rate via a sensor in a...

In a 2009 study, researchers at Harvard's MassGeneral Hospital for Children as well as other institutions analyzed the blood oxygen levels of newborns when they were placed in cribs versus car seats and found that nearly one - quarter of the time that the babies were in car seats, their oxygen saturation levels (the ratio of oxygen - saturated hemoglobin to total hemoglobin in their blood) dropped below 95 percent, the cutoff for what is considered normal.

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

But advances in the understanding of atmospheric oxygen levels are challenging that idea, explains Sandra Schachat, a paleoentomologist at Stanford University, who led a recent study that modeled the gas's availability during the hexapod gap.

At this height, oxygen levels are about 40 per cent lower than at sea level, and lowlanders experience hypoxia — associated with headaches, fatigue and smaller fetuseAt this height, oxygen levels are about 40 per cent lower than at sea level, and lowlanders experience hypoxia — associated with headaches, fatigue and smaller fetuseat sea level, and lowlanders experience hypoxia — associated with headaches, fatigue and smaller fetuses.

Researchers at Princeton University analyzed ice cores collected in Greenland and Antarctica to determine levels of atmospheric oxygen over the last 800,000 years.

Curtis Deutsch, associate professor at the University of Washington's School of Oceanography, studies how increasing global temperatures are altering the levels of dissolved oxygen in the world's oceans.

The latest results come at a time when scientists are already reconsidering what was happening to ocean oxygen levels during this crucial period.

The researchers kept the animals in chronically thin air that's similar to the oxygen levels people would experience at the peak of Mont Blanc, the tallest mountain in the Alps, which soars nearly 5000 meters above sea level.

Other researchers, like Tony Koslow, a research oceanographer emeritus at Scripps Institution of Oceanography and former director of the California Cooperative Oceanic Fisheries Investigations, have focused on how the changes in oxygen levels affect marine life.

Using an earth system modeling approach, Deutsch and scientists at the National Center for Atmospheric Research and the Georgia Institute of Technology mapped out changing oxygen levels across the world's oceans through the end of the 21st century.

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.

«People previously thought that you needed some threshold level of oxygen for evolution to work really well,» says Carl Simpson, a paleobiologist at the University of Colorado in Boulder who was not involved in the work.

According to the researchers, Nautilus are exquisitely adapted to life at low oxygen levels, making it likely that ammonites were as well.

«What this says is that it's possible for animals to be diversifying like normal even at much lower oxygen levels.»

So a research team led by scientists at Children's National Health System in Washington, D.C., delivered subpar levels of oxygen to newborn piglets, whose course of brain development and whose highly evolved brain structure mirrors in many respects those of humans.

«Our work pinpoints the time when the ocean began accumulating oxygen at levels that would substantially change the ocean's chemistry and it's about 250 million years earlier than what we knew for the atmosphere.

New research explains how atmospheric oxygen was trapped at low levels following the Great Oxidation.

In their paper, published in Nature Communications, Atmospheric oxygen regulation at low Proterozoic levels by incomplete oxidative weathering of sedimentary organic carbon, the University of Exeter scientists explain how organic material — the dead bodies of simple lifeforms — accumulated in the earth's sedimentary rocks.

Professor Tim Lenton and Dr Stuart Daines of the University of Exeter Geography department, created a computer model to explain how oxygen stabilised at low levels and failed to rise any further, despite oxygen already being produced by early photosynthesis.

The model suggests atmospheric oxygen was likely at around 10 % of present day levels during the two billion years following the Great Oxidation Event, and no lower than 1 % of the oxygen levels we know today.

The powerhouse algae that live in the corals» tissues, providing their color and food through photosynthesis, pump out oxygen at levels toxic to their polyp hosts.

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].

The scientists looked at atmospheric oxygen levels throughout Earth's history.

Yet the body tissues of Tibetans consume just as much oxygen as those of people who live at sea level.

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.

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.

Mark Gladwin, a researcher in pulmonary medicine at the National Heart, Lung, and Blood Institute (NHLBI) in Bethesda, Maryland, says that the nitrite levels in the Tibetans» blood are similar to those NHLBI researchers are using to treat heart and liver injuries caused when blood is restored to oxygen - deprived tissues in experimental animals.

«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.»

The results show that blue crabs can — at moderate water temperatures — survive at oxygen levels as low as 1.3 milligrams per liter, just 15 % of the oxygen available in fully saturated seawater.

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