Sentences with phrase «oxygen in»

When academic allergist Sanjiv Sur at the University of Texas in Galveston and colleagues exposed mice to ragweed pollen, they noticed the animals produced highly - reactive forms of oxygen in their lungs after 15 minutes.

Additional experiments using 12 sea spider species from Antarctica and the United States confirmed that gut contractions propel the flow of blood and oxygen in this group of marine - dwelling arthropods, the team reports today in Current Biology.

The traditional metabolic model assumes the buildup is related to lack of oxygen in the cell, so the common treatment has been to administer oxygen and bicarbonate buffers.

Radiation from hot young stars could account for ionised oxygen in the cloud, but not the ionised neon: neon doesn't shine in the ultraviolet, as seen in the cloud, without lots of X-rays hitting it.

Its combination with oxygen in the atmosphere produces energy and water as its sole by - product, making it one of the main candidates to substitute fossil fuels as a source of energy for the transport sector.

Because oxygen is heavier than helium — which astronomers consider the cut - off for so - called heavy elements — and water has oxygen in it, the researchers could use the water signal to determine the abundance of heavy elements in the atmosphere of HAT - P - 26b.

Now, a team of researchers has put forward some of the strongest evidence yet to support the hypothesis that high levels of oxygen in the oceans were crucial for the emergence of skeletal animals 550 million years ago.

The team also made the first ever measurement of the level of oxygen in human blood at 8400m, on the balcony of Everest.

Due to the lack of oxygen in the cancer cells, VEGF - A (Vascular Endothelial Growth Factor) is formed and this promotes the formation of new blood vessels to supply the tumor.

In this phenomenon, water molecules and oxygen in the atmosphere create strong oxidants which degrade organic compounds into water and carbon dioxide.

By comparison, slightly younger deposits with lower molybdenum and rhenium concentrations had osmium isotope evidence for less continental input, indicating the oxygen in the atmosphere had disappeared.

Among the new tests Cowan expects will be ready in time for the games are a more accurate test for human growth hormone (HGH) and a test for autologous blood doping, a method athletes use to boost the number of red blood cells and oxygen in circulation by drawing their own blood, storing it, and then transfusing it back into themselves.

These whiffs of oxygen likely happened in the following 100 million years, changing the levels of oxygen in Earth's atmosphere until enough accumulated to create a permanently oxygenated atmosphere around 2.4 billion years ago — a transition widely known as the Great Oxidation Event.

After 10 minutes in the sun, the water is replaced by the two gases - hydrogen in one cylinder, oxygen in the other.

Algal blooms deplete oxygen in lakes, produce toxins, and end up killing aquatic life in the lake.

Algae consume oxygen in the water, especially as they die and decompose.

«Loss of oxygen in the ocean is one of the serious side effects of a warming atmosphere, and a major threat to marine life,» said NCAR scientist Matthew Long, lead author of the study.

Jack Mustard from Brown University suggests the Mars Oxygen In - situ resource utilization Experiment (MOXIE) technology could in future help refuel vehicles returning to Earth.

So Stoléru and other scientists have switched to a faster method, functional MRI (fMRI), which monitors the flow of blood to active neurons by measuring levels of oxygen in the brain.

The osmium isotope evidence found in black shales correlates with higher continental weathering as a result of oxygen in the atmosphere.

Trying to actually suck up the oxygen in a room would be, as McKenzie puts it, «like trying to squeeze water out of a sponge under water.»

Scientists with the U.S. Geological Survey, the Illinois - Indiana Sea Grant and partners recently found that dead zones caused by hypoxia, the depletion of oxygen in water, are unexpectedly variable in Lake Erie, sometimes disappearing and reemerging elsewhere in the matter of hours.

At the same time, Eliason monitored the amount of oxygen in the water to learn how well their bodies were utilizing oxygen, a measure of athletic ability.

Some are looking for high levels of oxygen in the atmospheres of other planets.

At this very early stage in geological history, there was little or no oxygen in the atmosphere.

The hydrogen passes through a membrane and combines with oxygen in the fuel cell, generating electricity and waste water.

The observations, coupled with measurements of sulfide and oxygen in the environments, suggest that the gill bacteria in bivalves break down sulfide around the roots of the grasses, letting them grow.

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.

Before 2.3 billion years ago, there was little oxygen in the atmosphere but plenty of dissolved iron and many organisms like bacteria derived energy by metabolizing the metal.

Particularly lively debates take place on how the concentration of oxygen in the atmosphere evolved; after all, it is associated with many other geological weathering processes, including the fate of uranium.

Due to the prolonged lack of oxygen in the deep water, the phosphate phosphorus reserve of the Baltic Sea's main basin is high.

Importantly, our study suggests that, by focusing research exclusively on adults, it is likely that we will underestimate the number of species vulnerable to decreasing levels of oxygen in the marine environment.»

Hypoxia at the bottom of Lake Erie occurs during the summer as a result of biological activity in the colder bottom layer that consumes dissolved oxygen in the water.

So just one new kind of particle; but the other ideas of that unification that I mentioned in supersymmetry suggest that it is more complicated; that there at least are several different kinds of particles involved, you know, like hydrogen and oxygen in water where water also has impurities; though we are going to find out anyway what this medium is made out of.

Haemoglobin engineered to include the crocodile's triggering mechanism, however, would release the oxygen in the presence of bicarbonate in the bloodstream.

She found that in anoxic conditions, when there is no oxygen in the bottom layers of the Chesapeake Bay's waters, dissolved methane built up, probably coming from the mud, and when storms mixed up the invisible layers of the Bay's waters, the methane made it to the surface and into the atmosphere.

Measuring pH lets us monitor the carbon cycle, which underpins the basic chemistry of the ocean and generation of oxygen in the air.

Corrosion from atomic oxygen in the upper atmosphere can be forestalled with a coating of gold or platinum a few microns thick in the danger zone.

Less oxygen in the water also meant fewer worms, so less oxygen - reducing digging, the researchers explain.

But for animals to evolve, the concentration of oxygen in the ocean and atmosphere had to be just right.

Researchers at Boston Children's Hospital encased microscopic pockets of oxygen in a layer of lipids, the fatty molecules that make up cell membranes.

However, when there is no oxygen in the water — as regularly occurs at the bottom of the Chesapeake Bay during the summer time — the microbes can't do their job and dissolved methane is released into the water column and rests there at the bottom.

Each new batch of sediment that settles onto the sea floor contains bacteria; as those bacteria were exposed to the oxygen in the water, they began storing a chemical called phosphate in their cells.

«An important result of this study is how changing conditions on Earth's surface and the increase of oxygen in the atmosphere influenced the composition of deep Earth.

Ocean microbes produce at least fifty percent of the oxygen in our atmosphere while removing large amounts of carbon dioxide.

Unlike its related species, the yellow - bellied sea snake (Hydrophis platurus), the yellow sea snake subspecies lives in a significantly more hostile environment — the waters in the gulf are warmer, often turbulent, and the dissolved oxygen in them occasionally drops to extremely low levels.

Species living in coastal regions could face a significant future threat from reduced levels of oxygen in the marine environment, according to research published in Scientific Reports.

«Something [regulated] oxygen in relatively narrow limits.»

Then, about 2.4 billion years ago, oxygen in the atmosphere suddenly increased by about 10,000 times in just 200 million years.

«We learned that devices that can be worn for a week or longer for continuous monitoring were needed for practical use in medical and sports applications,» says Professor Takao Someya at the University of Tokyo's Graduate School of Engineering whose research group had previously developed an on - skin patch that measured oxygen in blood.