Sentences with phrase «carbon than oxygen»

It is a variable carbon star, which is to say a late type star that resembles a red giant (or less frequently a red dwarf), that has an atmosphere with more carbon than oxygen.

The R - type and N - type stars often contain more carbon than oxygen, whereas the S - type stars appear to have an enhanced content of zirconium as compared with titanium.

Not exact matches

We developed a new carbon fiber matrix that's much stronger and more capable at cryo than anything before, and it holds 1,200 tons of liquid oxygen.

«We developed a new carbon - fiber matrix that's much stronger and more capable at cryo than anything before, and it holds 1,200 tons of liquid oxygen,» he said at the time.

A value for Hoyle state 2 % higher than the measured value would prevent the formation of carbon.5 A value 2 % lower than the measured value would produce lots of carbon, but no oxygen.5 Both are essential atoms for life.

As a result, the child «rebreathes» his own carbon dioxide rather than breathing in oxygen - rich fresh air, and dies.

If this happens, the child can «rebreathe» his own carbon dioxide rather than breathing in oxygen - rich fresh air.

«Children are more susceptible to carbon - monoxide poisoning because the gas enters their bloodstream faster than it enters an adult's, cutting off oxygen to the brain and heart,» says Meri - K Appy.

«For more than 70 years,» explains García Rojas «we have known that the weak recombination lines of the ions of elements, such as oxygen and carbon, give us values for their abundances which are much bigger than those obtained using collision lines, even though the collision lines are 1,000 to 100,000 times brighter than the recombination lines.

Krissansen - Totton explains in more detail: «Having methane and carbon dioxide together is unusual, because carbon dioxide is carbon's most oxidized state, and methane (composed of a carbon atom linked to four hydrogen atoms rather than any oxygen at all) is its least,» he says.

Creating so much oxygen takes a fiercer nuclear furnace than is needed for a carbon - rich mixture, so the stars that became these white dwarfs must have been hot and massive.

A group led by Boris Gänsicke at the University of Warwick, UK, found two white dwarfs that hold far more oxygen than carbon, which is unusual.

Air leaving the lungs is 78 percent nitrogen, 16 percent oxygen, and 4 percent carbon dioxide — depleted in oxygen and enriched more than a hundredfold in carbon dioxide compared with what went in, due to human metabolism.

Globular clusters contain far lower concentrations of the planet - forming heavy elements — such as carbon, oxygen, and iron — than do our sun and nearby stars, leading some to suspect that it might be difficult for planets to form there.

They determined a material with less than 90 percent carbon and enhanced by oxygen, rather than nitrogen or sulfur, worked best for both carbon capture and methane selectivity, especially for materials activated at temperatures approaching 800 degrees Celsius.

William McDonough aims to create buildings that produce oxygen, sequester carbon, and produce more power than they use.

Among the cleanest low - carbon fuels is hydrogen, which can react with oxygen to release energy, emitting nothing more harmful than water (H2O) as the product.

By looking at the chemistry of rocks deposited during that time period, specifically coupled carbon and sulfur isotope data, a research team led by University of California, Riverside biogeochemists reports that oxygen - free and hydrogen sulfide - rich waters extended across roughly five percent of the global ocean during this major climatic perturbation — far more than the modern ocean's 0.1 percent but much less than previous estimates for this event.

Not only does it come from renewable resources, but it's better than PET at sealing out gases like oxygen and carbon dioxide, which is critical for preserving foodstuffs.

Despite our tendency to think of it as weightless, oxygen is in fact 1.33 times heavier than carbon.

The Pt3Ni nanoframe catalysts achieved a more than 36-fold and 22-fold enhancement in two different measures of catalytic activity (mass and specific activities, respectively) for the oxygen reduction reaction in comparison to state - of - the - art carbon - supported Pt catalysts (Pt / C) during prolonged exposure to reaction conditions.

This material, in which carbon substitutes for some of the lattice oxygen atoms, absorbs light at wavelengths below 535 nanometers and has a lower band - gap energy than rutile (2.32 versus 3.00 electron volts).

The air holds virtually no oxygen but has between a hundred and a thousand times more carbon dioxide than today, a global greenhouse so effective that the waves below may be near boiling point.

The microbes rely on oxygen, carbon and other nutrients in their deep environment to live, but Røy's team found that carbon is so limited that the cells respire oxygen 10,000 times slower than bacteria in lab - grown cultures.

Less than a micrometer in diameter, it's the most abundant photosynthetic organism on Earth, taking up carbon dioxide and releasing oxygen.

Cortright and chemical engineer James Dumesic discovered in their university lab back in 2001 that by starting with water and various carbohydrates from plants — basically, carbon, hydrogen and oxygen compounds — and using catalysts, heat and pressure, they could start creating CO2 and hydrogen and then use that hydrogen to eliminate the oxygen as water (the process produces more water than it consumes).

Astronomers have discovered the densest extrasolar planet yet: A Jupiter - mass remnant of a carbon - and oxygen - rich star that measures no more than 55,000 kilometers across.

Trying to make a building like a tree that makes oxygen, sequesters carbon, produces more power than it needs to operate, and purifies its own water — things like that.

Finally, about 130 million years after the red giant phase, the sun will go through a final spasm and eject its outer layers into space, leaving behind a white dwarf: a hot, dense lump of carbon and oxygen no larger than Earth.

Yakir burned more than 100 Globe samples at 2,000 to 2,200 °F in a super-oxygen-rich oven, letting the carbon in the paper combine with the oxygen to make carbon dioxide.

The oxygen temperature curve said that the climate in central Greenland was colder around 12,000 years ago than around 15,000 years ago, despite the fact that two key climate drivers — carbon dioxide in the atmosphere and solar radiation — would suggest the opposite.

Previous models predicted carbon - rich planets could only form in disks with carbon - oxygen ratios higher than 0.8.

To heat that boiler, the damp, crumbly brown coal known as lignite — which is even more polluting than the harder black anthracite variety — burns in the presence of pure oxygen, a process known as oxyfuel, releasing as waste both water vapor and that more notorious greenhouse gas, carbon dioxide (CO2).

The dwarf is not hot enough to fuse carbon or oxygen, so it no longer burns like a star, but for a time it is still plenty hot enough - more than 50,000 degrees Fahrenheit - to expel the remnants of its atmosphere and to blast all that departed gas with ultraviolet light.

This white dwarf's mass allows it to fuse elements slightly heavier than hydrogen, so it has a stable core of carbon and oxygen.

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.

[90] Class S stars have excess amounts of zirconium and other elements produced by the s - process, and have more similar carbon and oxygen abundances than class M or carbon stars.

Exhaled air contains 17 percent oxygen, less than 21 percent of fresh air, and 4 percent carbon - dioxide, which can inhibit cardiac contraction.

Now, if you have all this very cold, nearly freezing water surrounding these ice caps, sucking up carbon dioxide out of the polar atmosphere, at nearly the highest possible rate, 30 times faster than oxygen, and 70 times faster than nitrogen, doesn't it stand to reason that the air that remains might just have a lot less carbon dioxide in it than the atmosphere across the rest of the planet?

At the freezing point, carbon dioxide is 30 times more soluble than oxygen and 70 times more soluble than nitrogen.

In the presence of a silver catalyst, ethylene combines with oxygen to form ethylene oxide rather than combusting to form carbon dioxide, which is an undesirable product.

This is especially dangerous because red blood cells can uptake carbon monoxide faster than oxygen so if there is a lot of carbon monoxide in the air, it can replace oxygen in cells, leading to injury, tissue damage and eventually death.

But, more than this, the body senses that there is too much carbon dioxide and not enough oxygen (not because there is not enough AIR, but because the carbon dioxide was not exhaled and the chemical ratio is off).

Deep Diaphragmatic Breathing: Deep breathing describes a full exchange of breath, with more oxygen entering the body, and more carbon dioxide exiting, than you would experience during a normal, unconscious breathing pattern.

Since carbohydrate is richer in oxygen than fat, its metabolism requires 25 percent less water and generates 50 percent more carbon dioxide.

The number of carbon molecules that must be oxidized with oxygen molecules is different with E85 than pump gasoline.

Now for the science bit: carbon dioxide is heavier than oxygen, so it sits at the bottom of your lungs waiting to be expelled.

-- Every human appears to have 10, 20 or more horses yoked with him (the primemovers that burn fossil fuels and make our current lives comfortable) which consume oxygen and spew out far more carbon - dioxide than man would do alone.

One thing that I have never had explained and that I would very much like to understand is this: I believe carbon dioxide and methane are greenhouse gasses effectively because they retain heat more or longer than the Oxygen and Nitrogen that make up the bulk of the atmosphere.

The 2009 State of the Climate report gives these top indicators: humans emitted 30 billion tons of of CO2 into the atmosphere each year from the burning of fossil fuels (oil, coal, and natural gas), less oxygen in the air from the burning of fossil fuels, rising fossil fuel carbon in corals, nights warming faster than days, satellites show less of the earth's heat escaping into space, cooling of the stratosphere or upper atmosphere, warming of the troposphere or lower atmosphere, etc..