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How to use oxygen in a sentence

Looking for sentences and phrases with the word oxygen? Here are some examples.

Sentence Examples

Some bacteria are able to switch from enzymes using oxygen as a terminal electron acceptor to enzymes using alternative electron acceptors.
A high incidence of middle ear complications from hyperbaric oxygen therapy has been described in patients with artificial airways.
If the airway is clear and intubation is not immediately required, blood pressure and pulse should be checked and oxygen administered.
Without it, Shirley would have to constantly monitor the oxygen levels in his rebreather and inject oxygen into his breathing loop manually.
The only thing to hope for was our emergency oxygen supply would hold out long enough for us to get to a lower altitude.
Exposing the fabric to the oxygen in air and heating it for a while changes the molecules back to indigo.
The air sizzled as oxygen was greedily consumed by the roiling ball of fire.
The most familiar cause of hypoxic hypoxia is the low oxygen content of air at high altitude.
Secondary alcohols can be readily recovered from ketones by breaking the double bond between the oxygen and carbon and adding hydrogen.
The major risk comes from the formation of reactive oxygen intermediates during normal oxygen metabolism.
In addition, the very reactive singlet oxygen can be generated by an input of energy.
Zinc tends to be much less reactive with oxygen than are the metals that are galvanized.
The addition of scavengers suggests that reactive oxygen species caused this bacterial growth inhibition.
Thus, it is unsurprising that rubisco still reacts with both oxygen and carbon dioxide.
At higher temperatures, magnesium reacts vigorously with oxygen to produce a blinding white light.
A placenta or afterbirth is attached to the wall of the uterus and is the source of food and oxygen for the puppy inside the matron.
In the context of the affinity of hemoglobin for oxygen there are four primary regulators, each of which has a negative impact.
Several of the dogs and Monty were given oxygen therapy, but one dog, a whippet called Smokey, died after inhaling too much smoke.
Plants, as other aerobic organisms, require oxygen for the efficient production of energy.
Humans use a form of cellular respiration requiring oxygen which is called aerobic respiration.
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These bacteria are all facultative aerobes, meaning that they are oxygen tolerant.
In waterlogged soils, plants strongly influence soil oxygen availability by transporting oxygen through aerenchyma to soils.
You also may need to aerate the water so the water organisms' oxygen needs are met.
We've put pumps in to aerate the water and feed back oxygen into the dam for the fish to survive.
Supplemental oxygen is not required to climb it, but good brakes in your car are advisable.
They took their oxygen suits off and walked over to their antigravity beds.
He listens to the oxygen machines hum and burble and gasp, the humidifier wheeze, the buzz of the fluorescent light in the hall.
One possible source for this high frequency dispersion could be trace amounts of adventitious oxygen or contributions from iron.
Well, it only makes sense, what with using all that valuable oxygen from the earth's atmosphere and all!
These adsorbates can be removed using UV light in combination with oxygen in an in situ cleaning unit.
Partial pressure in oxygen was adjusted for altitude and reported as if it were obtained at sea level.
If more oxygen gas is added to the system, the concentration of oxygen will increase.
Perch, pike and walleye tend to look for shallow, weedy lakes because the oxygen level tends to be a lot higher.
It is a very active metal that reacts vigorously with oxygen in the air, catching fire spontaneously.
In fish, the branchial apparatus forms a system of gills for exchanging oxygen and carbon dioxide between the blood and the water.
Some others, like the Siamese fighting fish, are capable of breathing air in addition to extracting oxygen from the water with their gills.
High PO2 levels help produce an efficient decompression profile providing they are balanced against oxygen toxicity.
Be sure to include submergent plants such as common waterweed and hornwort for their high oxygen output.
His throat burned for oxygen and he felt his ribs compressing, compacting, and ready to break.
Nadp is much preferred to oxygen as an electron acceptor in intact chloroplasts.
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Most organic substances react with oxygen exothermically, but are quite stable, because the activation energy to do so is so large.
The reason we need to breathe is to provide the oxygen needed to carry out cellular respiration in our cells.
It obeys the law of conservation of mass since the amount of phosphorous and oxygen remains the same throughout the reaction.
The early scarcity of dissolved sulfates and atmospheric oxygen has big implications.
But the atmosphere of the early Earth contained much less oxygen than it does today.
These agents reduce oxygen attack on the lubricant base oil to lessen oil thickening and the buildup of corrosive acids.
The heart rate speeds up in order to quickly provide the extra oxygen and nutrients your body will need.
Xanthine oxidase uses molecular oxygen as an electron acceptor, resulting in the formation of superoxide radicals.
The major role of red cells is to transfer oxygen from the lungs to the tissues.
This enzyme uses inorganic oxygen as an electron acceptor and H 2 O 2 is formed that has to be detoxified by a catalase.
Reactive oxygen species are generated under various biotic and abiotic stresses, and trigger cell death.
This waif-like girl was sitting upright, gasping for breath with an oxygen cannula dripping blood.
As the oxygen mask reduced her need to gasp for breath, Mary relaxed a bit and reflected on her last, turbulent hour.
I half-expect to asphyxiate, because with so many gasping at once, one would think all the oxygen would leave the air.
The fire brigade established the gas was an asphyxiant, which takes oxygen out of the air, but is not a fire risk.
Though his vital signs returned to normal, the abiding fear was that oxygen deprivation had caused permanent kidney or brain damage.
Mallory had only rudimentary oxygen equipment, no radio, a basic cotton tent and hobnail boots.
He looked up at his parents and gave them a loopy grin from the pure oxygen he had been breathing while being prepped for the surgery.
You should therefore avoid a quick ascent and take time to acclimatise to the mountains' oxygen challenged air.
Thicker layers may reduce the amount of oxygen in the soil and encourage plants to root in the mulch layer rather than in the soil.
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By surrounding hot metals with inert argon, the metals are protected from potential oxidation by oxygen in the air.
He needed an oxygen machine to help him breathe and a team of nurses to roll him over in bed.
The oxygen sensor was inserted through the bark side in the same way as for the trees in the arboretum.
The pilot wears a pressure suit and uses the onboard liquid oxygen system for breathing at high altitudes.
About midnight, they'll start putting 500,000 gallons of liquid hydrogen and liquid oxygen in it.
A second later, this led to the structural failure of the external tank, igniting the liquid hydrogen and oxygen it carried into a fireball.
He is the flip side of Martin Scorsese, another director for whom rock music is like oxygen in the blood.
Having stolen an interstellar rocket and propelled himself into orbit, he is now moments away from asphyxiation as his oxygen runs low.
We know that when eyes are shut, oxygen can reach the cornea from the iris solely by way of the stagnant aqueous humor.
The cells line an area of human lungs that helps our bodies absorb oxygen and shed carbon dioxide.
The oxygen and nutrient deficiencies caused by too much smoking result in premature lines on the skin and a loss of natural elasticity.
It is believed a flame from a cigarette lighter ignited oxygen at the man's bedside.
Eventually, a lifeline arrives from the surface allowing fresh oxygen and limited communication.
Their little boy is permanently dependent on oxygen and also has a shortened life expectancy.
As blood is pumped around the body, it carries oxygen and nutrients that are essential for life.
Vitamin E is an antioxidant that prolongs the life of red blood cells and is necessary for the proper use of oxygen by muscles.
Although glucose and oxygen react spontaneously to liberate energy, they do so exceedingly slowly at room temperature outside of a cell.
He opened his mouth and breathed deeply, gathering oxygen into his lungs with which to sound the retreat.
A sufferer of birth anoxia, a lack of oxygen to the brain at birth, people were amazed by how Mr Ryder managed to live life to the full.
Lack of oxygen or anoxia is a common environmental challenge which plants have to face throughout their life.
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Lunar settlers could extract oxygen from the minerals ilmenite and anorthite.
Gaseous hydrogen and oxygen flow separately around either side of two electrolytic plates serving as anodes and cathodes.
I also requested a stand for the oxygen tank because the tank we used fell over while we were resuscitating the patient.
The International Space Station does indeed have plenty of reserve oxygen following a resupply on Christmas Day.
As volcanic activity slowed and oxygen output of plants declined, small-lunged dinosaurs had trouble adjusting.
The inability of ARPE-Rho 0 cells to respire was confirmed by oxygen consumption analysis in a respirometer.
In her latter years, she could not breathe without oxygen or even totter round her beloved garden on her Zimmer frame.
River water begins to putrefy when lack of oxygen promotes the growth of anaerobic bacteria, which produce the tell-tale smell of stale water.
Below the depth of oxygen penetration life is restricted to anaerobic bacteria.
The copper forms a square lattice with an oxygen atom bridging each pair of copper atoms.
The oxygen atom of an ether functional group has two lone pairs of electrons.
We have recorded reduced levels of chloride, nitrate-nitrite nitrogen, ammoniacal nitrogen, chemical oxygen and dissolved and suspended solids.
There are a couple of ambos with her and one of them is strapping an oxygen mask over her face.
When supplemental oxygen was given, all six infants had an increase in sleep duration due largely to an increase in REM sleep.
In the open hearth process an oxygen lance is arranged to blow large volumes of oxygen onto the molten metal in the hearth.
Tunas have numerous lamellae and very thin lamellar walls, and are able to extract more oxygen from the water than any other fish.
The data suggested a significant increase in oxygen demand when comparing the overhead exercise relative to the chest exercise.
Regular oxygen infusions from my canister prevent me from fainting, but a fellow passenger is not so lucky when we stop for a yak photo-op.
Wearing an oxygen mask and giving the thumbs-up to the cameras, Murphy was stretchered out of the conference hall.
The supply of oxygen cylinders and regulators has been increased to support more than one patient in a single room should the need arise.
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The Environment Agency tested the water in Manor House Gardens pond and found oxygen levels to be well above safe levels.
Consequently, other atomic weights calculated by reference to oxygen also remained debatable.
These tiny blue-green algae refashioned their world by excreting oxygen while using hydrogen from water.
Then the oxygen machine arrived, the pain medications increased, and my mother slipped out of this world and into the next.
They argue that conflict, as long as it's not the knock-down-drag-out variety, is the oxygen of creativity.
These times may not be adequate to permit the red cells to provide sufficiently rapid delivery of oxygen in massively bleeding patients.
Then, too, you have to bring along a good supply of oxygen and reconvert exhaled carbon dioxide to replenish it.
Gass suspects constriction of blood vessels that reduces oxygen delivery to breast tissues is partly to blame.
All forms of hypertension can constrict the blood vessels in the uterus that supply the fetus with oxygen and nutrients.
The protons recombine with the oxygen in the air that's also flowing through the fuel cell and is then expelled as water vapor.
Other devices include oxygen sensors to check exhaust gases, accelerometers to detect any sudden sharp braking, and a range of pressure and temperature monitors.
From August 2002 through January 2003, the relative abundances of hydrogen, helium, carbon, and oxygen ions recorded by Voyager 1 differed from all previous measurements.
Coconut charcoal is charcoal from coconut shells that has been altered with oxygen to create lots of tiny pores.
These water molecules are ripped apart and change into hydroxyl anions, each of which is negatively charged and has one oxygen ion with a proton attached.
Deprived of oxygen by the decompression, the flight test crew had to grab for oxygen masks.
During his specialist training he helped in the complex hyperbaric oxygen treatments and developed his lifelong interest in radiobiology and cancer research.
Those patients randomized to respire supplemental oxygen during exercise training succeeded in training at higher training intensities than those respiring supplemental air.
You would asphyxiate from the lack of oxygen in the atmosphere.
The physician is therefore always striving to achieve adequate oxygenation of the artificially respirated patient using the lowest possible inspiratory oxygen concentration.
Even if their oxygen masks had deployed, there is a microphone in the masks to enable them to send a distress call.
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When all of the sugar is fermented to alcohol and carbon dioxide, and a small amount of oxygen is present, yeast can reconvert some of the ethyl alcohol back to acetaldehyde.
It reacts very readily with oxygen by burning smokelessly, with carbon dioxide and water as its byproducts.
Once all the cash has been collected, it will also be used to purchase necessary items such as rucksacks to carry the equipment, training manuals and oxygen cylinders.
Each of the radiant heater beds is equipped with a portable oxygen tank.
When heated in air, it reacts with oxygen to form arsenic oxide.
Because high blood pressure constricts the blood vessels in the uterus that supply the baby with oxygen and nutrients, the baby's growth may be slowed.
When your late-model car's oxygen sensor goes on the fritz, it will impair operation of the catalytic converter and probably cause your car to flunk its next emission test.
The source pointed out that the shuttle's liquid oxygen tank is located just in front of the wheel well and behind and beneath the Spacelab module.
As the temperature of the gases rises, the organic contaminants begin to break down and recombine with oxygen from the air, forming carbon dioxide and water.
The primary laser beam is generated by a megawatt chemical oxygen iodine laser located at the rear of the fuselage, which lases at 1.315 micron wavelength.
The most flammable compounds contain carbon and hydrogen, which recombine with oxygen relatively easily to form carbon dioxide, water and other gases.
When the gas is hot enough, the compound molecules break apart, and the atoms recombine with the oxygen to form water, carbon dioxide and other products.
The conventionally utilized enzyme for glucose measurement, glucose oxidase, inherently utilizes oxygen as its electron acceptor during the oxidation of glucose.
Muscle relaxants should be prescribed only after failure of analgesic and sedative regimens to optimise ventilatory support or reduce oxygen consumption.
The paint spray workshop also contained two acetylene cylinders, two oxygen cylinders and two propane bottles as well as chromic acid and acetone.
Sulfates are a combination of sulfur and oxygen and are a part of naturally occurring minerals in some soil and rock formations that contain groundwater.
The resulting effect is that the dissolved oxygen level goes down in the water, weeds like water hyacinth proliferate and there's breeding of mosquitoes.
The oxygen is designed to give skin that's tired and sallow a jump-start.
Salinity, temperature, and dissolved oxygen strata were measured in each basin of each lake, again to compare abiotic limnology across lakes and over time at Ogac Lake.
Lactic acidosis may facilitate the supply of oxygen to working skeletal muscle by causing a rightward shift of the oxyhemoglobin dissociation curve.
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The century-old rain trees with their huge umbrella canopy appear to nod in gratitude to the British officers who planted them, making the whole estate a giant oxygen factory.
He notes that the increased myocardial oxygen consumption occurring with epinephrine may have harmful effects in patients with asystolic cardiac arrest.
It has been discovered that the vitamin has the ability to rid your body of the free radicals that sometimes prevent oxygen being pumped around your limbs.
The spike-tailed paradise fish is a labyrinth fish, and like all such fishes they extract atmospheric oxygen with the help of a vessel-lined cavity above their gill arches.
The further separation yielded 12 fractions containing aliphatic and alicyclic, 24 containing aromatic and 1 containing nitrogen, sulphur and oxygen containing compounds.
Fortunately, there was enough oxygen for the pilot and copilot to make a safe landing in Denver.
Most fuel cells on the market combine atmospheric oxygen with hydrogen generated by reforming methanol or methane to make electricity, with water as a byproduct.
Finally, long-term morphological changes are induced, such as the formation of lenticels and aerenchyma to improve the oxygen permeability of the tissue.
It is known that excessive oxygen can damage the retina of a premature baby leading to a condition called retrolental fibroplasia which results in blindness.
The main hospital was reported to be running short of oxygen and bandages.
And finally, oxygen therapy given to sustain the lives of premature infants can cause retinopathy of prematurity, causing permanent vision loss or blindness.
By adding large amounts of oxygen to the manure, naturally occurring bacteria will begin to break down the waste and reduce its odor in one to six months.
The Proterozoic aeon saw episodic increases in atmospheric oxygen content.
These blood substitutes are aimed at getting more oxygen to deprived tissues.
That makes it a reliable way to measure how much oxygen was in the atmosphere when the minerals were deposited.
The answer lies in polyphenol oxidase, an enzyme that combines with oxygen to speed up cellular decomposition.
A lifeguard, followed by Adair, came running to help laying Azara's limp body on the soft white sand and started the pouring oxygen back into her lungs and resuscitating her.
Although oxygen data might conceivably be affected in this way, radiogenic isotopes should not and for these there is no strong correlation with any major element parameter.
The youngster had breathing problems and was given an oxygen mask, inhalers and steroid tablets after contracting a viral-induced wheeze last summer.
The use of sulfur isotope reconstruction is often paired with oxygen when a molecule contains both elements.
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High-pressure oxygen acts on the central nervous system and may cause convulsions or death.
The coal, oxygen of the air affinitatively flies to the particles of pure carbon left behind.
Improvements in the focal oxygen supply by HBO ameliorated calcific uremic arteriolopathy in high-altitude areas.
The hemoglobin of the blood carries oxygen but does not directly catalysize oxidation.
Functional magnetic resonance imaging visualizes the blood oxygen level-dependent signal in the brain, which indexes neural activity.
Transfer of oxygen from the lungs to the brain in the human body occurs by means of forced convection.
Mountain climbers need additional oxygen because of the hypobaric conditions.
The most profound abnormality determines the oxygen deficiency category... of hypoxemia.
In 2002, oxygen levels that could support fish along the entire length were recorded for the first time since industry began on the Mersey.
As plants took hold on the continental margins, oxygen levels increased and carbon dioxide dropped, although much less dramatically.
By the Cisuralian Epoch, both oxygen and carbon dioxide had recovered to more normal levels.
The resulting liquid air was then processed to separate the liquid oxygen for combustion.
Various triggers for the Cambrian explosion have been proposed, including the accumulation of oxygen in the atmosphere from photosynthesis.
In the case of Proust's tin oxides, one tin atom will combine with either one or two oxygen atoms.
Limelight used a block of quicklime heated by an oxygen and hydrogen flame.
He was taken to the circuit's medical centre on a stretcher with an oxygen mask and drip, but was conscious throughout.
In recent times, EAF steelmaking technology has evolved closer to oxygen steelmaking as more chemical energy is introduced into the process.
Blowing oxygen through molten pig iron lowers the carbon content of the alloy and changes it into steel.
As in basic oxygen steelmaking, fluxes are also added to protect the lining of the vessel and help improve the removal of impurities.
ValuJet Flight 592 crashed on May 11, 1996, as a result of improperly loaded chemical oxygen generators.
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Some of the consequences include small round windows, doors that open inwards and are larger than the door hole, and an emergency oxygen system.
A low voltage current is run through the water, and gaseous oxygen forms at the anode while gaseous hydrogen forms at the cathode.
The pH and the levels of nitrogen, lysine, phosphate, and oxygen of the batches must also be carefully controlled.
The oxygen attacks the tungsten metal, and the resulting tungsten oxide particles travel to cooler parts of the lamp.
It is now known that density of water also depends on the isotopic ratios of the oxygen and hydrogen atoms in a particular sample.
For example, the thermal stratification and the degree and frequency of mixing exerts a strong control on the distribution of oxygen within it.
The lone pairs of electrons on the oxygen of the hydroxyl group also makes alcohols nucleophiles.
In 1898, Kelvin predicted that only 400 years of oxygen supply remained on the planet, due to the rate of burning combustibles.
Such a pattern seems to fit the information on climate change found in oxygen isotope cores.
This radical shift from a chemically inert to an oxidizing atmosphere caused an ecological crisis, sometimes called the oxygen catastrophe.
At first, oxygen would have quickly combined with other elements in Earth's crust, primarily iron, removing it from the atmosphere.
She was raised thinking that she had been briefly deprived of oxygen during a difficult birth resulting in a learning disability.
It does however, react with sodium or potassium cyanide under alkaline conditions when oxygen is present to form soluble complexes.
The biological role for copper commenced with the appearance of oxygen in earth's atmosphere.
The lead oxidises to lead monoxide, then known as litharge, which captures the oxygen from the other metals present.
Silver and its alloys with gold are used as wire or ring seals for oxygen compressors and vacuum equipment.
Cyanobacteria were the first organisms to evolve the ability to photosynthesize, introducing a steady supply of oxygen into the environment.
The oxygen quickly reacted with iron and other minerals in the surrounding rock and ocean water.
Once a saturation point was reached for the reactions in rock and water, oxygen was able to exist as a gas in its diatomic form.
Sulfide interferes with mitochondrial function in aerobic organisms, limiting the amount of oxygen that could be used to drive metabolism.
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Oceanic sulfide levels decreased around 800 million years ago, which supports the importance of oxygen in eukaryotic diversity.
The shortage of oxygen might well have prevented the rise of large, complex animals.
This genetic threshold may have a correlation to the amount of oxygen available to organisms.
Using oxygen for metabolism produces much more energy than anaerobic processes.
Organisms that use more oxygen have the opportunity to produce more complex proteins, providing a template for further evolution.
Carbon and oxygen isotope ratios vary with time, and researchers can use those to map subtle changes that occurred in the paleoenvironment.
Their hemoglobin and myoglobin store oxygen in body tissues and they have twice the concentration of myoglobin than hemoglobin.
If the egg layers are too thick they suffer from oxygen depletion and often die, entangled in a maze of mucus.
Water pollution from agricultural runoff causes dead zones for plants and aquatic animals due to the lack of oxygen in the water.
The Stirling engine is heated by burning diesel fuel with liquid oxygen from cryogenic tanks.
Poisonous gases are removed, and oxygen is replenished by use of an oxygen bank located in a main ballast tank.
The oxygen in the air is sometimes kept a few percent less than atmospheric concentration to reduce fire danger.
However, large numbers of bacteria are found within the sediment which have a very high oxygen demand.
Unlike vertebrates, insects do not generally carry oxygen in their haemolymph.
Peat forms in wetland conditions, where flooding obstructs the flow of oxygen from the atmosphere, slowing the rate of decomposition.
Peatlands are adapted to the extreme conditions of high water and low oxygen content, of toxic elements and low availability of plant nutrients.
The species is tolerant of low levels of oxygen and of a diminished quantity of the phytoplankton on which they feed.
Cuttlefish blood must flow more rapidly than that of most other animals because haemocyanin carries substantially less oxygen than haemoglobin.
Sea turtles spend almost all their lives submerged, but must breathe air for the oxygen needed to meet the demands of vigorous activity.
The lungs permit a rapid exchange of oxygen and prevent gases from being trapped during deep dives.
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Sea turtle blood can deliver oxygen efficiently to body tissues even at the pressures encountered during diving.
Myoglobin, which stores oxygen in muscle tissue, is much more abundant than in terrestrial animals.
The oxygenated blood can be directed towards only the brain and other essential organs when oxygen levels deplete.
It combusts with oxygen to create heat, as demonstrated by a British inventor in a 1974 film of the National Film Board of Canada.
Methane is also an asphyxiant and may displace oxygen in an enclosed space.
Maximum supplementary firing refers to the maximum fuel that can be fired with the oxygen available in the gas turbine exhaust.
Marine organisms contribute significantly to the oxygen cycle, and are involved in the regulation of the Earth's climate.
During inhalation, about twice as much oxygen is absorbed by the lung tissue as in a land mammal.
Both pinnipeds and cetaceans have large and complex blood vessel systems which serve to store oxygen to support deep diving.
Compared with the deep waters of the surrounding seas, NSDW has more nutrients but less oxygen and is relatively old.
The concentrations of dissolved gases like oxygen and nitrogen are not usually included in descriptions of salinity.
When it was drained, the oxygen of the air reached it, since then the peat has been slowly oxidizing.
The resulting oxygen deficit is principally caused by allochthonous bacteria larger than one micrometre in size.
Many groups of freshwater fish extract oxygen from the air as well as from the water using a variety of different structures.
Each filament contains a capillary network that provides a large surface area for exchanging oxygen and carbon dioxide.
This process induces growth of plants and algae and due to the biomass load, may result in oxygen depletion of the water body.
After such organisms die, the bacterial degradation of their biomass consumes the oxygen in the water, thereby creating the state of hypoxia.
The depleted oxygen levels in turn may lead to fish kills and a range of other effects reducing biodiversity.
When dissolved oxygen levels decline to hypoxic levels, fish and other marine animals suffocate.
Generally, these include life forms that tolerate cool temperatures and low oxygen levels, but this depends on the depth of the water.
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Like landfill gas, biogas is mostly methane and carbon dioxide, with small amounts of nitrogen, oxygen and hydrogen.
The inert gas buffer between fuel and oxygen atmospheres ensures they are never capable of ignition.
The subcutaneous vessels in the membrane very close to the surface allow for the diffusion of oxygen and carbon dioxide.
Flight is an energetically taxing aerobic activity and requires large amounts of oxygen to be sustained.
The oxygen uptake through the skin suffices to sustain the needs of the cold and motionless frogs during hibernation.
At the mouth of the River Clyde there has been a significant issue of oxygen depletion in the water column.
The lack of vegetation will result in the loss of oxygen in the atmosphere, and animal life will become extinct.
Its chemical formula is H2O, meaning that its molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.
Aquatic vertebrates must obtain oxygen to survive, and they do so in various ways.
The first of these sources is a loss of oxygen concentration in the ocean which caused deep water regions called the lysocline to grow shallower.
The deep waters do not mix with the upper layers of water that receive oxygen from the atmosphere.
Antarctic bottom water also has a high oxygen content relative to the rest of the oceans' deep waters.
The Benguela oxygen minimum zone starts around a depth of 100 m and is a few hundred meters thick.
Bacteria that use sulpher rather than oxygen reside in the oxygen minimum zone.
An excess of oxygen depleting chemicals in the water can lead to hypoxia and the creation of a dead zone.
Another way sea lions mitigate the oxygen obtained at the surface in dives is to reduce digestion rate.
This reduction in digestion results in a proportional reduction in oxygen use in the stomach and therefore a correlated oxygen supply for diving.
The turtles can take up dissolved oxygen from the water using these papillae, in much the same way that fish use gills to respire.
If not eaten, dead animals decompose, as bacteria use oxygen to break down the organic matter.
Large amounts of dead matter decomposing in the ocean causes the surrounding levels of dissolved oxygen to decrease.
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Carbon, hydrogen and oxygen are widely available as water and carbon dioxide.
The resulting lack of dissolved oxygen greatly reduces the ability of these areas to sustain oceanic fauna.
Total atmospheric pressure decreases as altitude increases, causing a lower partial pressure of oxygen which is defined as hypobaric hypoxia.
If oxygen depletion progresses to hypoxia, fish kills can occur and invertebrates like worms and clams on the bottom may be killed as well.
The oxygen concentration in the bottom layer may then become low enough for hypoxia to occur.
Low dissolved oxygen conditions are often seasonal, as is the case in Hood Canal and areas of Puget Sound, in Washington State.
Virtually all elements burn in an atmosphere of oxygen, or an oxygen rich environment.
In a very short time the oxygen saturation can drop to zero when offshore blowing winds drive surface water out and anoxic depth water rises up.
Changes in ocean circulation triggered by ongoing climate change could also add or magnify other causes of oxygen reductions in the ocean.
Females were found to have ovaries that were half as large as those in normal oxygen levels.
Under normal oxygen conditions, ARNT combines with estrogen to activate genes.
Overall the lake's oxygen level is poor with only a small area to the east of Long Point that has better levels.
The biggest impact of the poor oxygen levels is to lacustrine life and fisheries industry.
Aquatic animals, from fish to salamanders, are generally able to live with a low amount of oxygen in the water.
Some can obtain oxygen from the air instead, while others can live indefinitely in conditions of low oxygen.
AgustaWestland manufactures helicopters in Yeovil, and Normalair Garratt, builder of aircraft oxygen systems, is also based in the town.
Analysis of oxygen isotopes in teeth indicates that some were also of southern European origin.
The BBC TV reported that a Nile crocodile that has lurked a long time underwater to catch prey builds up a large oxygen debt.
The heart also requires nutrients and oxygen found in blood like other muscles, and is supplied via coronary arteries.
While an antler is growing, it is covered with highly vascular skin called velvet, which supplies oxygen and nutrients to the growing bone.
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Similarly, wood submerged in water may not be attacked by fungi if the amount of oxygen is inadequate.
The plastron of a diving beetle is not directly a source of oxygen, but acts as a gill, acquiring oxygen from the surrounding water.
During expiration, oxygen poor air flows to the anterior air sacs and is expelled by the action of the expiratory muscles.
This rise in respiration rate however is not necessarily associated with a greater rate of oxygen consumption.
The blood oxygen affinity, known as P50, is higher than that of both humans and similar avian species.
The reason for this decreased oxygen affinity is due to the hemoglobin configuration found in common ostrich blood.
This subtype increases oxygen affinity in order to transport oxygen across the allantoic membrane of the embryo.
This can be attributed to the high metabolic need of the developing embryo, thus high oxygen affinity serves to satisfy this demand.
This shift in hemoglobin concentration results in both decreased oxygen affinity and increased P50 value.
In relation to the IPP, the ostrich also uses ATP to lower oxygen affinity.
However the presence of oxygen in the head space of the bottle and environmental factors will in the long run alter the smell of the fragrance.
These waters have among the lowest levels of salinity in the Arctic basin as well as a very high oxygen content and increased biogenic elements.
These pseudoradicals are not directly chain carriers in the reduction of peroxydisulfate, but they can further build up oxygen radical ions.
Elemental iron occurs in meteoroids and other low oxygen environments, but is reactive to oxygen and water.
Further refinement with oxygen reduces the carbon content to the correct proportion to make steel.
In this configuration, the sixth coordination site reserved for the oxygen is blocked by another histidine residue.
Thus, when deoxyhemoglobin takes up oxygen, its affinity for more oxygen increases, and vice versa.
As an example, during the combustion of wood, oxygen from the air is reduced, gaining electrons from the carbon.
Once formed, these anion free radicals reduce molecular oxygen to superoxide, and regenerate the unchanged parent compound.
The net reaction is the oxidation of the flavoenzyme's coenzymes and the reduction of molecular oxygen to form superoxide.

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