Sentences with phrase «release hydrogen»

As CO2 rises, some enters the oceans and through basic chemical equilibrium reactions involving the dissociation of its hydrated form, carbonic acid to release hydrogen ions, lowers the pH of the water (i.e., raises the hydrogen ion concentration).

When dipped into a beaker of water, instead of producing electricity, the leaf harnessed the electrons to break the chemical bonds of water and release hydrogen gas — a fuel that can store energy at a significantly higher density and lower cost than electricity.

Also I remember reading somewhere that only certain types of car battery release hydrogen gas (I've lost the link but it seemed to imply that most modern ones don't?)

I know batteries release Hydrogen gas as a normal part of the charging process, but do they release Hydrogen Sulfide gas, ever?

The idea (here is an overview) is that cancer cells release hydrogen peroxide, which causes a stress response in neighboring cells, stimulating them to release lactic acid, which the cancer cells can metabolize.

«If we can find a way to change the hard part, that is, make it easier to release the hydrogen, then we can improve this catalyst.»

The catalyst chemically reacts with ammonia borane, a molecule that stores hydrogen densely, to release the hydrogen as a gas.

One way to do this is to store the hydrogen in safe materials that release the hydrogen on demand via simple chemical reactions.

Researchers at the University of Erlangen - Nürnberg (Germany) report in the journal Angewandte Chemie their development of an enhanced platinum catalyst for the steam reforming of methanol to release hydrogen.

She hopes that HRL staffers can eventually identify a «Goldilocks» compound with sufficient adsorption capacity that will release hydrogen at 150 degrees C or even lower.

For decades, researchers tinkered with light - triggered catalysts that encourage water molecules to release hydrogen gas — but none of the catalysts were sufficiently cheap and stable.

First, the chemists release the hydrogen from its bonds with carbon by mixing methane with oxygen, throwing in a catalyst, and turning up the heat.

Upham et al. used nickel dissolved in molten bismuth to pyrolyze methane to release hydrogen and form carbon, which floats to the surface of the melt, where it can be removed.

Rafiee is developing a way to line a hydrogen vehicle's fuel tank with a one - atom - thick layer of graphene, essentially a sheet of single - walled carbon nanotubes that have been opened up and laid flat, so that the tank can better store and release hydrogen.

If the polymers can release that hydrogen on demand — a feat not yet shown — they could lead to plastic gas tanks that carry cars hundreds of kilometers between fill ups.

«We need a cheap, porous material to store and release hydrogen at low pressure and at room temperature, and it needs to be a reversible process, for when the tank needs to be refilled,» he says, adding that he and his colleagues are working on a business plan that will help them commercialize their work.

Heat from uncovered fuel could ignite the zirconium cladding, and the super-heated metal could then oxidize steam, releasing hydrogen and oxygen.

«Borane dimethyl sulfide, one of the reagents used in the process up to now, if opened to air, reacts with the moisture in the air, releasing hydrogen, a highly flammable gas, which could catch fire; so extreme caution needs to be used.

Electrons were consumed by the polyaniline, while the holes were consumed by the methanol, releasing hydrogen ions, which made the solution acidic close to the place where the light was absorbed.

But when water corrodes uranium, the reaction also releases hydrogen.

The borohydride solution releases its hydrogen as it flows over a catalyst made of ruthenium.

Within a few years, laptops and other energy - guzzling portable devices could run on long - lasting, easily recharged fuel cells based on a safe and practical new way of storing and releasing hydrogen.

To check how they could get the hydrogen back out of the material, the scientists heated it and found that it released hydrogen easily, quickly and only traces of unwanted by - products.

On the other hand, the chemoautotrophic hypothesis posits that iron sulfide reactions released hydrogen, which combined with carbon dioxide in the atmosphere to form organic compounds.

Their article describes the molecular interactions inside a prototypical molecule for storing and safely releasing hydrogen, a prerequisite for using hydrogen as an energy source.

Once it sinks into the water, the carbon dioxide reacts with water molecules to form carbonic acid; the carbonic acid then releases hydrogen ions which in turn combine with carbonate ions (the ones that shellfish and other creatures need) removing them from the water.

By accepting and releasing hydrogen proteins act like buffers to help maintain the body's acid - base balance.

Releasing a hydrogen cation is what makes it an acid.)

Honey releases hydrogen peroxide through an enzymatic process, which explains its general antiseptic qualities, but active Manuka honey contains «something else» that makes it far superior to other types of honey when it comes to killing off bacteria.7

It releases hydrogen peroxide,... Read More...

In fact, our white blood cells kill bacteria and viruses by releasing hydrogen peroxide and other compounds we call free radicals.

This matter in turn is the energy source for the animals, by breaking down this organic matter (releasing the energy they require) while the hereby released hydrogen is neutralized by oxygen and forms water again.

The reason for this is that bicarbonate is converted to carbonate in a warmer ocean, releasing a hydrogen ion thus stabilizing the pH.

Not exact matches

«They found hydrogen sulfide, the odiferous gas that most people avoid, in Uranus's cloud tops,» according to a press release from Gemini Observatory, a high - power telescope atop a Hawaiian volcano.

«While our process is not yet optimized, we estimate that an ammonia decomposition reactor no bigger than a 2 - liter bottle will provide enough hydrogen to run a mid-range family car,» David said in a news release.

NIF's goal is to focus the intense energy of 192 giant laser beams on a BB - sized target filled with hydrogen fuel, fusing the hydrogen atoms» nuclei and releasing many times more energy than it took to initiate the fusion reaction.

The «releasing of energy» in the structure of hydrogen is so violent that we are inclined to see it emotionally as ripping a hole in the very fabric of being, but that is the élan vital perhaps.

Yet, we need not conclude that all the «released energy»» was potentially contained in the individual hydrogen atom or the system of such atoms.

Unlike ice sanitizing technologies that use UV light or other sources that create ozone, which can be hazardous to health, the patent - pending BPi200 uses a small electrical housing and carbon - fiber brushes to release airborne positive hydrogen and negative oxygen ions throughout the ice machine without creating ozone.

At the recommend daily intake of about 1 to 2 tablespoons, approximately 5 — 10 mg of hydrogen cyanide is released from flaxseed, which is well below the estimated acute toxic dose for an adult of 50 to 60 mg inorganic cyanide and below the 30 to 100 mg / d humans can routinely detoxify (Roseling 1994) Eating excessive amounts of flax seeds too quickly can cause mild digestive problems in some people.

The levels of hydrogen peroxide released are not high enough to damage tissue but sufficient enough to affect bacteria.

When Manuka Honey comes into contact with body fluids, the glucose oxidase enzyme slowly releases the antibacterial hydrogen peroxide.

Janeway also objected to a policy rider that would restrict disclosure of toxic and hazardous air pollution, including ammonia or hydrogen sulfide, released by Concentrated Animal Feeding Operations in rural communities.

To maintain this level, your blood creates its own buffer system consisting of molecules that absorb excess hydrogen ions if things get too acidic, or release them if the blood is too basic.

In the 1950s, deuterium was used in thermonuclear weapons because nuclear fusion of deuterium atoms (or of deuterium and the heavier hydrogen isotope, tritium) releases tremendous energy.

For example, the nanoparticle catalyst converted 99 % of dimethylphenylsilane to the corresponding silanol in just 9 min at room temperature, releasing an equimolar amount of hydrogen gas at the same time.

The reaction rate between atmospheric hydrogen chloride (HCl) and chlorine nitrate (ClONO2) is greatly enhanced in the presence of ice particles; HCl dissolves readily into ice, and the collisional reaction probability for ClONO2 on the surface of ice with HCl in the mole fraction range from ∼ 0.003 to 0.010 is in the range from ∼ 0.05 to 0.1 for temperatures near 200 K. Chlorine (Cl2) is released into the gas phase on a time scale of at most a few milliseconds, whereas nitric acid (HNO3), the other product, remains in the condensed phase.

So far in 2006, the Office of Science has released announcements for basic research in hydrogen fuel and solar energy utilization.

Metals (elements heavier than hydrogen and helium) are created in the interiors of stars as they evolve and then released into surrounding gas through supernova explosions or stellar winds (often referred to as chemical evolution).

At present, industrial hydrogen is produced from natural gas using a process that consumes a great deal of energy while also releasing carbon into the atmosphere, thus contributing to global carbon emissions.