Sentences with phrase «with oxygen concentrations»

Not exact matches

Landon was diagnosed with hypernatremic dehydration (a high concentration of sodium in the blood), cardiac arrest from hypovolemic shock (a condition where the liquid portion of the blood is dangerously low), and hypoxic - ischemic encephalopathy (a brain injury caused by oxygen deprivation).

High nitrate concentrations can be particularly dangerous for babies under six months, since nitrate interferes with the ability of blood to carry oxygen.

The separation into two chambers means there are two separate flue gas streams to deal with too: air with a reduced concentration of oxygen is discharged from one chamber, water vapour and CO2 from the other.

They charted how fluctuating oxygen concentrations correlated with the emergence of new animals as seen in the fossil record and from genetic data.

Instead, species that immigrate from areas with higher water temperatures and lower oxygen concentrations will establish themselves and displace the native polar species,» says Hans - Otto Pörtner.

Earth's atmosphere is mostly nitrogen and oxygen, but the exact concentration varies with altitude.

By watching a capsule pass through the gut with an ultrasound, the researchers found that oxygen concentrations varied in different regions of the gut, for example between the stomach and the small intestine.

As a result, oxygen saturation at depth dropped from an average of 67 percent to 59 percent while microbial cell concentrations doubled to 5,510 cells per milliliter compared with just 2,730 cells per milliliter outside the plume.

Results of the study, which the researchers report online today in the Proceedings of the National Academy of Sciences, show that for the first 170 million years or so of flying - insect evolution, wing length grew and shrank in step with variations in average oxygen concentration.

When a certain amount of oxygen vacancies (4 mol %) exists in the material, the proton concentration around Zr is higher than that around the rare - earth element which indicates protons with less influence from the trapping effects of the rare - earth element (Fig. 1).

This would include low oxygen subsurface sites with environmental conditions predating the Great Oxidation Event that occurred about 2.3 billion years ago when the atmosphere went from very low to high oxygen concentrations.

«However, we noted that the biological approaches, which analyse the concentrations of bacteria, their DNA, and oxygen consumption, were very sensitive and provided us with a great deal of information.

At the end of these glaciations, considerable rise in marine arsenic concentrations concurred with rapid demise of atmospheric oxygen.

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.

Previous work with strontium cobaltites relied on changes in the oxygen concentration in the surrounding gas atmosphere to control which of the two forms the material would take, but that is inherently a much slower and more difficult process to control, Lu says.

The models showed that thinner carbon nanotubes with a relatively high concentration of nitrogen would perform best, as oxygen atoms readily bond to the carbon atom nearest the nitrogen.

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.

UV radiation can also break up water, which could increase the concentration of oxygen even with no living organisms responsible.

Decreasing concentrations of dissolved iron do not coincide with the occurrence of oxygen but with the increase of dissolved nitrogen compounds.

With little oxygen available to convert that hydrogen into water, hydrogen gas probably accumulated in the atmosphere and oceans in concentrations as high as hundreds to thousands of parts per million.

With JWST, a few hours of integration time will be enough to detect Earth - like levels of water vapor, molecular oxygen, carbon dioxide and other generic biosignatures on planets orbiting a white dwarf; beyond that, observing the same planet for up to 1.7 days will be enough to detect the two CFCs in concentrations of 750 parts per trillion, or 10 times greater than on Earth.

A scientist with the Louisiana Universities Marine Consortium in Cocodrie, she cruises the Gulf of Mexico, measuring oxygen concentrations.

In a way, this is consistent with the work of former Emory investigator Marie Csete, who showed that stem cells are happier and healthier in oxygen concentrations that reflect the levels they experience in the body: between 2 and 5 %.

Working with microscopist Charles Lin from the Wellman Center for Photomedicine at Massachusetts General Hospital and stem cell biologist David Scadden from the Harvard Stem Cell Institute, the investigators measured local oxygen concentration in the bone marrow of live mice.

His current roles associated with EMSL include principal investigator for development of fluorescent sensing «optodes» to measure oxygen concentrations and gradients within micromodels; contributing investigator for sensing and surface modification to support the PNNL Carbon Sequestration Initiative; and mentor for several staff scientists.

Charcoal is made from wood (or coconut shells), by heating it at very high temperatures (800 to 1,200 degrees) with very low oxygen concentrations.

Areas with a lot of trees have a higher oxygen concentration in the environment, and therefore it's easier to breathe and relax.

The plasma glucose concentration was determined with the use of a glucose oxidase method (Beckman glucose analyzer with an oxygen electrode; Beckman Instruments, Fullerton, CA).

I get my daily stretch and my dose of oxygen with my Teeter Inversion Table, which is so essential for optimum focus, concentration, and mental energy.

Therapeutic benefits of HBOT include a greatly increased oxygen concentration in all body tissues (even with reduced blood flow), improved healing time of stubborn wounds, stimulated growth of new blood vessels in areas of reduced circulation.

They have large sinuses in their abdomens to hold blood and can also store oxygen in their muscles with increased myoglobin concentrations in muscle.

> 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.

The change in atmospheric oxygen concentration in recent years is consistent with the amount of fossil fuel that was burned in those years.

With all the hydrocarbons we burn it is my understanding that atmospheric oxygen concentration has been steadily decreasing.

Contrast the 400 parts per million CO2 — that's just 0.04 % — with the 21 % concentration of oxygen!

Do you think that the concentration of oxygen in the oceans is in equilibrium with the atmosphere?

But pollution also covers hundreds of chemicals which are fine or even beneficial at low levels but which if released in large quantities or in problematic circumstances cause «harm» — like phosphorus (grows your veges but also leads to toxic cyanobacterial blooms which kill cattle), nitrogen (grows crops kills many native species of plants and promotes weed growth costing farmers), copper (used as an oxygen carrier by gastropods but in high concentrations kills the life in sediments which feed fish), hormones like oestrogen (essential for regulating bodies but in high concentrations confuse reproductive cycles especially with marine life) or maybe molasses from a sugar mill (good for rum but when dumped into east coast estuaries used to cause oxygen sag in estuaries leading to massive fish kills).

The world's climate is way too complex... with way too many significant global and regional variables (e.g., solar, volcanic and geologic activity, variations in the strength and path of the jet stream and major ocean currents, the seasons created by the tilt of the earth, and the concentration of water vapor in the atmosphere, which by the way is many times more effective at holding heat near the surface of the earth than is carbon dioxide, a non-toxic, trace gas that all plant life must have to survive, and that produce the oxygen that WE need to survive) to consider for any so - called climate model to generate a reliable and reproducible predictive model.

I am starting an oxygen market with the premise that oxygen is destroyed everytime you burn fossil fuels and there may be one day dangerously low levels of oxygen as the CO2 concentration rises.

as for carbon dioxide and nitrogen gas and oxygen gas and the collisions you mention — the concentration by volume of carbon dioxide in the atmosphere is very small — the most significant effects in the bottom layer of the atmosphere (troposphere) will surely be the heat trapping effect of increased carbon dioxide combined with the pressure - height changes of concentrations of carbon dioxide due to the warming effect.