Sentences with phrase «than any oxygen at»

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.

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.

This fully automated vacuum packaging system with partial or total back gas flush ensures oxygen residue of less than 1.5 % for a broad range of packaging types and valve options at increased output speeds.

In plastic bottles, a layer of Selar ® PA amorphous nylon resin blended with EVOH provides a superior oxygen barrier at a lower cost than EVOH alone.

Rely on the power of the sun rather than chlorine bleach to remove stains (while you're at it, switch from chlorine bleach to oxygen bleach for all of your household cleaning needs)

Research indicates that some infants, particularly those born at less than 37 weeks gestation, may be subject to transient episodes of bradycardia, apnea, and oxygen desaturation when traveling in a standard car safety seat.

Because they still have poor head control and often experience flexion of the head while in a sitting position, infants younger than 1 month in sitting devices might be at increased risk of upper airway obstruction and oxygen desaturation.128, — , 132 In addition, there is increasing concern about injuries from falls resulting from car seats being placed on elevated surfaces.133, — , 137 An analysis of CPSC data revealed 15 suffocation deaths between 1990 and 1997 resulting from car seats overturning after being placed on a bed, mattress, or couch.136 The CPSC also warns about the suffocation hazard to infants, particularly those who are younger than 4 months, who are carried in infant sling carriers.138 When infant slings are used for carrying, it is important to ensure that the infant's head is up and above the fabric, the face is visible, and that the nose and mouth are clear of obstructions.

Newborns in the home - birth group were less likely than those in the midwife - attended hospital - birth group to require resuscitation at birth (RR 0.23, 95 % CI 0.14 - 0.37) or oxygen therapy beyond 24 hours (RR 0.37, 95 % CI 0.24 - 0.59).

New York Gov. Andrew Cuomo was flying in a state plane at more than 10,000 feet in July when the oxygen masks fell from the ceiling and «swung ominously» while the plane descended, said John PL Kelly, the governor's press secretary at the time, who was aboard.

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.

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.

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.

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.

According to Robert Clayton, a professor emeritus at the University of Chicago in Illinois who pioneered the use of oxygen isotopes in cosmochemistry, the authors may have done little more than find a more precise method of measurement.

If an alien civilization is looking at us from far away, and it knows something about chemistry, it will know that we have millions to billions of times more oxygen than we should [if there were no life on Earth].

«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.

The crew found the three new species of Loricifera (jellyfish - like animals less than a millimeter long) in the sediment of L'Atalante Basin, a zone of salty, oxygen - depleted water at the bottom of the Mediterranean.

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.

She reported at the American Association of Physical Anthropologists meeting in March that women who carry more oxygen in their blood have more than twice as many surviving children as women who carry less oxygen.

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.

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

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.

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).

Because carotid cells produce so much dopamine — up to 45 times more than the fetal neurons — and because they thrive in the relatively low oxygen concentrations found in the brain, he explains, they may do a better job at correcting Parkinson's symptoms than the fetal cells do — and they raise fewer ethical questions.

The zone, which at about 5,000 square miles (13,000 sq km) is the second largest in the world but still smaller than in previous years, is so named because it contains no oxygen, or too little, at the Gulf floor to support bottom - dwelling fish and shrimp.

At its center is a cargo bin big enough to store more than seven tons of supplies, from oxygen and water to spare batteries and food.

At 62 °F and 72 °F, the critical oxygen level was less than 2 milligrams of oxygen per liter of water; this increased to between 2 and 3 milligrams per liter at 82 °F, and when testing recently fed and infected crabAt 62 °F and 72 °F, the critical oxygen level was less than 2 milligrams of oxygen per liter of water; this increased to between 2 and 3 milligrams per liter at 82 °F, and when testing recently fed and infected crabat 82 °F, and when testing recently fed and infected crabs.

Results of a new study led by researchers at William & Mary's Virginia Institute of Marine Science show that adult blue crabs are much more tolerant of low - oxygen, «hypoxic» conditions than previously thought.

The performance of the new catalyst was better than that of platinum, a noble metal that is known to excel at driving both oxygen evolution and reduction reactions.

Mountain air contains less oxygen than air at lower altitudes, so breathing it causes the heart to beat faster and the body to burn more energy.

The late Proterozoic — the time period beginning less than a billion years ago following this remarkable chapter of sustained low levels of oxygen — was strikingly different, marked by extreme climatic events manifest in global - scale glaciation, indications of at least intervals of modern - like oxygen abundances, and the emergence and diversification of the earliest animals.

In fact, the completely unplanned «experiment» had left the crew gasping for breath as the oxygen concentration gradually fell from 21 per cent to less than 15 per cent, making the atmosphere as thin as at an altitude of 4000 metres.

«Their cost of transport — the oxygen they use to move — is 48 percent lower than any other swimming animal,» says Bradford J. Gemmell, a marine biologist at the University of South Florida.

Microbes seem far - fetched at this point, but the other alternative — that the Martian atmosphere contained more oxygen in the past than it does now — seems possible, Lanza said.

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.

«We looked at the chemistry within young molecular clouds containing a thousand times less oxygen than our Sun.

By measuring the size of the largest raindrop imprints (inset) in ash that solidified soon after an eruption 2.7 billion years ago (pocked slab, main image) and comparing them to the imprints made by drops of various sizes and momentums in lab tests, the team estimates that the density of Earth's oxygen - free atmosphere 2.7 billion years ago most likely ranged between 50 % and 108 % of today's air and was certainly less than twice its modern density — a thickness insufficient to offset the dimness of the sun at the time.

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.

The bacteria living in these sediments were respiring the oxygen but at a slower rate than the supply of organic material dropping out of the water column, allowing these ancient deep marine sediments to remain oxygenated.

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.

Scientists have long known how the people of the Tibetan Plateau, including Nepal's famous mountain - climbing Sherpa, deal with oxygen levels up to 40 % less than those at sea level.

Two gene variants help Tibetans use oxygen more efficiently than people who live at low altitudes

In the presence of oxygen, silver dissolved readily into the glass when temperatures are higher than 650 degrees Celsius, causing more silver to eventually end up at the silicon surface and in turn forming a better contact.

«A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen,» said Stephanie Olson, a graduate student at the University of California, Riverside, a member of the Alternative Earths team and lead author of the new study published September 26 in the Proceedings of the National Academy of Sciences.

What's more, its air has 40 percent less oxygen than does the air at sea level.

It produced oxygen better than existing commercial catalysts and produced hydrogen at a comparable rate.

For more than the last ten years, Hartmut Michel has studied different oxygen reductases at the Max Planck Institute of Biophysics in Frankfurt, where he became director in 1987.

About 2.3 billion years ago oxygen has saturated the planet's surface and rapidly accumulated in vast amounts in our atmosphere, From that point on Earth's atmosphere became a glowing indicator of life for the entire Galaxy — at least, for civilizations that are slightly better in building telescopes than we are.

At electrical breakdown, the energies in the surging electrons were thousands of times greater than 10 — 19 MeV, so during the flood, bremsstrahlung radiation released a sea of neutrons throughout the crust.83 Subterranean water absorbed many of these neutrons, converting normal hydrogen (1H) into heavy hydrogen (2H, called deuterium) and normal oxygen (16O) into 18O.