Sentences with phrase «oxygen molecules»

"Oxygen molecules" refers to very tiny particles that make up the air we breathe. These molecules are essential for living things to survive because they help our bodies produce energy. Full definition
Otherwise, it would be difficult to tell what the «normal» amount of circulating reactive oxygen molecules in the animal's body was.
The new cobalt catalyst also splits water into hydrogen and oxygen without creating the kind of reactive oxygen molecules that can damage DNA or other processes essential to continuing life.
They estimate this temperature based on measurements of the microwave emissions of oxygen molecules in the atmosphere, which increase proportional to temperature.
The researchers used satellites to measure heat in the form of microwave radiation emitted by oxygen molecules in the atmosphere from 1979 to 2005.
It is also a powerful antioxidant which helps to prevent cell damage caused by unstable oxygen molecules known as free radicals.
The 12 - sided particles split oxygen molecules into charged oxygen ions, a reaction that's needed in fuel cells.
In particular, an oxygen reduction catalyst extracts electrons from oxygen molecules, while an oxygen evolution catalyst drives the reaction in the opposite direction.
Without enough red cells to grab oxygen molecules during their trip through the lungs, the kitty is in trouble.
The team suggests that earthly oxygen ions most likely originated in our atmosphere's ozone layer, where certain wavelengths of sunlight break apart ozone into regular oxygen molecules and single atoms.
Note, however, that the bulk of the atmosphere is made up of nitrogen and oxygen molecules which don't absorb IR at all.
Once inside, the volatile oxygen molecule reacts with carpets, chemical cleaner residue and human skin.
Interestingly, it is also possible to inject an additional electron to an individual oxygen molecule with the same tip, and then observe the transition from the inactive to the active state.
* It is also a potent antioxidant that can protect the body's cells and molecules from damage by free radicals and reactive oxygen molecules generated during normal metabolism and typical environmental exposures.
Iron is essential in helping the body transport oxygen molecules to tissue, and thankfully cacao contains it in abundance.
This process of activating oxygen molecules by adding electrons is ubiquitous — all living organisms use this trick, and modern fuel cells also work in this way.
Some said that it caused oxygen molecules to become reactive and turn off cancer genes.
The metabolism of fat is aerobic (it requires oxygen molecules) and occurs in the mitochondria.
But, these reactive, charged oxygen molecules can be lethal to human tissues and are implicated in a host of diseases.
A significant cause of aging are free radicals, which are unstable oxygen molecules.
The researchers used satellites to measure heat in the form of microwave radiation emitted by oxygen molecules in the atmosphere from 1979 to 2005.
The first is to produce the oxygen atom from oxygen molecules.
Many of our body systems are susceptible to oxidative stress and damage from reactive oxygen molecules.
An electrical charge — from lightning or a man - made source such as an electrical generator — splits atmospheric nitrogen and oxygen molecules into separate atoms.
Fake volcanoes would further damage weakened ozone layer So - called geoengineering, one of many proposals to fend off global warming, calls for injecting tiny particles of sulfur paired with oxygen molecules into the stratosphere to mimic a major volcanic eruption.
«Oxidants, such as oxygen molecules, deposit oxygen atoms into the bank.
When the quantum dots absorb ambient light, they transfer some of that energy to nearby dye particles, causing the crystal violet to release a kind of high - energy oxygen molecule that kills microbes.
This is surprising since it means that toxic oxygen molecules formed in heat - damaged chloroplasts during photosynthetic reactions during the light are likely not the major culprits that cause bleaching.
It has been known in biology for a long time that the excited oxygen molecule singlet oxygen is the main cause of aging in cells.
That light is absorbed by the chlorine - based molecules, which then excite nearby oxygen molecules, creating a highly reactive form of oxygen, known as singlet oxygen, that rips apart nearby biomolecules and kills the tumor cell.
Hans Røy, a geomicrobiologist at Aarhus University, found that each cell uses about one oxygen molecule per second — roughly one hundred - thousandth the metabolic rate of typical surface bacteria.
Samuel Wilson, M.D., senior NIEHS researcher on the team, explained that the damage is caused by oxidative stress, or the generation of free oxygen molecules, in response to environmental factors, such as ultraviolet exposure, diet, and chemical compounds in paints, plastics, and other consumer products.
It's a sure bet that you have inhaled oxygen molecules produced by Synechococcus, which today contributes a significant proportion of the oxygen available on Earth.
Also surprisingly, this functional switch is mediated by a single oxygen molecule, which attaches to a single amino acid at a very critical place in IRE - 1 — and this relatively subtle alteration has a dramatic effect.»
Since iron is needed in the formation of the heme component of hemoglobin, increasing the levels of iron in the blood can help facilitate the production of more hemoglobin, allowing for more oxygen molecules to be carried to the cells.
Dr Kenneth Cooper, author of Aerobics, believes excessive exercise also produces unstable oxygen molecules called free radicals that cause harm to the body.
Glutathione protects cells by neutralizing oxygen molecules before they damage cells.
At TU Wien (Vienna), it has become possible to control one of the most important chemical processes: switching oxygen molecules between a reactive and unreactive state.
To purify the spring water, Mountain Pure infuses it with ozone gas that is produced by subjecting oxygen molecules to a high electrical voltage.
«Colder weather, compressed oxygen molecules, it's a turbo engine's best friend.
This extra energy, they deduced, must go into forming a new, highly excited state of the trans molecule, which in turn transfers its energy to surrounding oxygen molecules.
But satellite measurements of radiation shed by oxygen molecules suggested that the bottom 10 kilometers of Earth's atmosphere had cooled 0.05 °C per decade in the same period.
High - resolution x-rays of the antibodies showed that this theory made sense: The antibodies include sites that can bind oxygen molecules, others that can hold water molecules, and an amino acid where UV light can be absorbed.
Roth and his colleagues instead went looking in Hubble's ultraviolet images, which can capture the light emitted when hydrogen and oxygen molecules collide with stray electrons.
At the Vienna University of Technology, it has now been possible to selectively switch individual oxygen molecules sitting on a titanium oxide surface between a non-reactive to a reactive state using a special force microscope.
Oxygen atoms are depicted in pink, and hydrogen in blue, in oxygen reduction and evolution reactions that transfer electrons between two species and convert oxygen molecules to hydroxide ions and vice versa.
That's because Virent's biogasoline does not have oxygen molecules along for the ride, unlike ethanol (the oxygen simply takes up space without adding much in the way of fuel, hence ethanol's lower energy density).
It's hard to keep oxygen molecules around, despite the fact that it's the third-most abundant element in the universe, forged in the superhot, superdense core of stars.
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