Sentences with phrase «oxidation reactions»
"Oxidation reactions" refer to chemical reactions where a substance loses electrons, resulting in a change to its properties or composition. Full definition
That type of oxidation reaction is good for protecting wood, but may not be so good for protecting the body.
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Unfortunately, the rate of the water oxidation reaction is very slow, which limits the rate of the overall reaction and the efficiency of the solar - to - hydrogen conversion.
They noticed a striking similarity between these aerobic oxidation reactions and the oxygen reaction in fuel cells and decided to see if they could apply a similar approach to a fuel cell.
In the extra virgin olive oil used for frying fish, this thermal oxidation reaction did not occur as it is more degradation - resistant than sunflower oil.
A breakthrough study that Apfeld co - authored while an instructor at Harvard Medical School provided one piece of the puzzle, thanks to a new fluorescent sensor technology that precisely measures oxidation reactions in the cells of live organisms.
With our method, you can build one peptide out of bulk chemicals and use one carbon - hydrogen oxidation reaction, coupled with a reaction to add a functional group, to produce eight new peptides all with retained handedness.»
When a battery is discharged, an electrochemical oxidation reaction proceeds at the negative electrode, and an electrochemical reduction reaction occurs at the positive electrode.
As one of the most powerful antioxidants ever discovered - with a greater range of effectiveness than vitamin C, vitamin E, or beta - carotene - melatonin helps prevent harmful oxidation reactions from occurring.
The presence of this laser - induced reaction pathway allows elucidation of the microscopic mechanism and the dynamics of the carbon monoxide oxidation reaction.
Known as a sous vide cooker, the heated bath holds food for hours within a fraction of a degree of the preset temperature, eliminating oxidation reactions that can discolor food and harm its flavor or texture.
The vacuum packing prevents air from insulating the food, improves food safety and greatly slows oxidation reactions that can lead to unwanted color changes or off - flavors.
«The result could be a runaway oxidation reaction» and the release of radioactive fission gases» and some of the radioactive fuel material.
«Faster, cheaper wastewater treatment through improved oxidation reactions: Researchers have developed a simple way to improve Advanced Oxidation Processes.»
«By stabilizing the energy of oxygen atoms and electrons, the catalyst lowers the energy cost of selective oxidation reactions just like a bank facilitates the sale of a car from one person to another.
These catalysts are not selective for the methanol oxidation reaction (MOR) at the anode or the oxygen reduction reaction (ORR) at the cathode.
For example, metal oxidation might be the sole oxidation reaction during battery discharge, whereas the formation of hydrogen (a highly inflammable and therefore dangerous gas) might be a significant reduction reaction during battery recharging.
Intracellular reduction - oxidation reactions underlie a variety of cell functions including energy metabolism, signaling, and transcriptional processes.
Other VOCs go through similar oxidation reaction.
«Basically, we are dealing here with simple oxidation reactions that are amplified particularly during intervals of high temperatures such as during the Cretaceous period.»
Also, your body innately has antioxidant enzyme systems in place to help counteract the normal oxidation reactions that occur naturally.
Is a key component of various proteins, as well as enzymes that catalyze cellular oxidation reactions
«some amino acids (cysteine, tryptophan and methionine, 50 microM each) also inhibited the TPO iodide oxidation reaction completely»
By reducing the unnecessary oxidation reactions in the body, in combination with hydrogen molecules, riboflavin may also help you make healthy red blood cells.
Twenty common amino acids exist in nature, but are altered by carbon - hydrogen oxidation reactions to change their shape or add functional groups such as alcohols or carboxylic acids.
«Someone will also need to determine exactly how Nocera's catalyst is driving the water oxidation reaction,» says Eisenberg, noting that achieving the first reaction alone is «an excellent development on a very difficult and keenly important problem.»
For example, when the battery is recharged, the overall electrochemical reduction reaction at the negative electrode is identical to the electrochemical oxidation reaction that proceeded at the negative electrode when the battery was discharged, only written in reverse.
An antioxidant is a chemical that reduces the rate of particular oxidation reactions in a specific context, where oxidation reactions are chemical reactions that involve the transfer of electrons from a substance to an oxidizing agent, this generally results in different chemicals to the original ones.
The desorption is caused by coupling of the adsorbate to the phonon bath of the ruthenium substrate, whereas the oxidation reaction is initiated by hot substrate electrons, as evidenced by the observed subpicosecond reaction dynamics and density functional calculations.
They can create great diversity initiated by one simple carbon - hydrogen oxidation reaction.»
Having the right tool for the job enabled scientists at the Department of Energy's Oak Ridge National Laboratory and their collaborators to discover that a workhorse catalyst of vehicle exhaust systems — an «oxygen sponge» that can soak up oxygen from air and store it for later use in oxidation reactions — may also be a «hydrogen sponge.»
The reduction and oxidation reactions that occur at the electrodes of batteries produce a flow of electrons that generate and store energy.
The tubes do not open when heated without lead or oxygen, suggesting that their ends are destroyed by an oxidation reaction catalysed by the metal.
Blood hemoglobin then serves as a catalyst for a reduction - oxidation reaction that takes place in the device.
«If we can put these H2O2 formation catalysts very close to something which performs the oxidation reaction, we can avoid the entire problem or concentrating and transporting hydrogen peroxide.»
The researchers found that as they began the move from an acid to a base fuel cell, both the hydrogen oxidation reactions and hydrogen evolution reactions became much slower, impacting the technology's efficiency.
As a catalyst, the ferrous iron should remain chemically unchanged at the end of the oxidation reaction.
When the battery is charged, the overall reduction reaction that proceeds at the negative electrode may not be the true reverse of the oxidation reaction that proceeded when the battery was discharged.
When one attempts to recharge a battery by reversing the direction of electric current flow, the opposite takes place: a reduction reaction proceeds at the negative electrode, and an oxidation reaction takes place at the positive electrode.
Of the two principal methods of making benzo - quinone one uses an oxidation reaction of aniline, the other an oxygenation reaction of diisopropylbenzene.
Then they employed this oxidation reaction as the anode reaction of the PEC that produces hydrogen at the cathode.
The oxidation reaction process results in breaking apart hydrogen into two electrons and two protons.
The scientists correlated the various peaks observed in the NMR spectra with the catalysts» reactivity for an oxidation reaction that removes a hydrogen atom from methanol.
The evolved enzyme, called aMOx, is fairly productive, catalyzing about 3,800 oxidation reactions, or turnovers, before running out of steam, compared to fewer than 10 for earlier anti-Markovnikov oxidation catalysts.
A key to realizing commercial - scale artificial photosynthesis technology is the development of electrocatalysts that can efficiently and economically carry out water oxidation reaction that is critical to the process.