Sentences with phrase «for oxygen reduction»

«Metal - Organic Framework Derived Hierarchically Porous Nitrogen - Doped Carbon Nanostructures as Novel Electrocatalyst for Oxygen Reduction Reaction.»

This newly established lab is capable to design and fabricate a wide variety of advanced materials for oxygen reduction, hydrogen oxidation, water oxidation, and hydrogen evolution, among others.

«Because of this new structure they're taking on, they're naturally shortening the distances between platinum atoms, which makes the platinum more active for the oxygen reduction reaction,» says Luke Roling, a graduate student in Mavrikakis» lab.

The Pt3Ni nanoframe catalysts achieved a more than 36-fold and 22-fold enhancement in two different measures of catalytic activity (mass and specific activities, respectively) for the oxygen reduction reaction in comparison to state - of - the - art carbon - supported Pt catalysts (Pt / C) during prolonged exposure to reaction conditions.

Not exact matches

It also improves the barrier for sensitive (moisture / oxygen) drugs by using the space gained from the reduction in blister size for increasing the seal width.

The finding that cerium oxide may grab hydrogen as well as oxygen is promising for efforts to engineer it to catalyze both reactions that cause electron gain («reduction» of a reactant) and electron loss («oxidation»).

Cerium oxide nanocrystals have the ability to absorb and release oxygen ions — a chemical reaction known as reduction oxidation, or redox, for short.

While unstrained lanthanum nickelate is a catalyst on its own for oxygen evolution, the strained material is an even better catalyst, enabling oxygen reduction as well.

«We also showed that TCL1 inhibits a mitochondrial enzyme required for in oxidative phosphorylation, leading to a reduction in oxygen consumption of the cells,» co-first author Shiho Aizawa explains.

A reduction in the amount of oxygen dissolved in the oceans due to climate change is already discernible in some parts of the world and should be evident across large regions of the oceans between 2030 and 2040, according to a new study led by the National Center for Atmospheric Research (NCAR).

Nitrogen - doped carbon nanotubes or modified graphene nanoribbons may be suitable replacements for platinum for fast oxygen reduction, the key reaction in fuel cells that transform chemical energy into electricity, according to Rice University researchers.

Some of the river characteristics the Drone River sensors could continuously monitor for are pH, dissolved oxygen, oxidation - reduction potential, conductivity (salinity), turbidity, temperature and dissolved ions.

Electrocatalyst design and development for the Oxygen Evolution Reaction (OER) and the electro - reduction.

For this work, he has used a number of ultra-high vacuum surface science techniques to, for example, identify and explain several very unusual mechanistic features of the heterogeneous chemistry occurring in a catalytic converter including: a) the dramatically different CO oxidation reaction mechanism on ruthenium metal relative to other late transition metals; b) the structure sensitive selectivity of the NO reduction reaction on rhodium metal; c) deactivation of rhodium metal at high oxygen partial pressures; and d) the significantly different CO oxidation reaction mechanism over oxidized rhodium metFor this work, he has used a number of ultra-high vacuum surface science techniques to, for example, identify and explain several very unusual mechanistic features of the heterogeneous chemistry occurring in a catalytic converter including: a) the dramatically different CO oxidation reaction mechanism on ruthenium metal relative to other late transition metals; b) the structure sensitive selectivity of the NO reduction reaction on rhodium metal; c) deactivation of rhodium metal at high oxygen partial pressures; and d) the significantly different CO oxidation reaction mechanism over oxidized rhodium metfor example, identify and explain several very unusual mechanistic features of the heterogeneous chemistry occurring in a catalytic converter including: a) the dramatically different CO oxidation reaction mechanism on ruthenium metal relative to other late transition metals; b) the structure sensitive selectivity of the NO reduction reaction on rhodium metal; c) deactivation of rhodium metal at high oxygen partial pressures; and d) the significantly different CO oxidation reaction mechanism over oxidized rhodium metal.

Another found that patients with coronary disease who listened to music for 20 minutes exhibited significant reductions in heart rate, respiratory rate, myocardial oxygen demand, and anxiety, both immediately after and one hour after the intervention.

A reduction in blood flow and oxygen could lead to lightheadedness or dizziness and may pose problems for people with heart disease or hypertension.

Furthermore, substituting oxygen for sulfur — causing oxidation — in sulfur - containing amino acids (including in the more rare S - adenosylmethionine) can have effects in methionine residues where the surface is exposed, causing an oxidation - reduction cycle, imparing the activity of «methionine sulfoxide reductase and the subsequent accumulation of methionine sulfoxide residues [that] are associated with age - related diseases, neurodegeneration, and shorter lifespan.»

A University of Exeter (U-E) led study shows for the first time how nitrate in beetroot juice leads to a reduction in oxygen uptake, therefore making exercise less tiring Beetroot juice also aids in reducing your blood pressure.

The therapeutic dotential of dietary precursor modulation by a fish - oil - supplemented diet (n - 3 fatty acids), such as eicosapentaenoic acid (C20: 5,n - 3) and docosahexaenoic acid (C22: 6,n - 3) in the therapy of ulcerative colitis has been shown to result in a 35 % to 50 % decrease in neutrophil production of LTB4.28 Significant improvement in symptoms and histologic appearance of the rectal mucosa has been observed in several small series of patients with Crohn's disease and ulcerative colitis given fish oil at 3 to 4 g daily for 2 to 6 months in uncontrolled studies.29 However, a larger, randomized, double - blind trial comprising 96 patients with ulcerative colitis failed to reveal any benefit in remission maintenance or treatment of relapse on 4.5 g of eicosapentaenoic acid daily, despite a significant reduction in LTB4 synthesis by blood peripheral polymorphonuclear cells.30 It should be emphasized, however, that the anti-inflammatory actions of the fish oils, in addition to inhibition of LTB4, include suppression of IL - 1 and platelet activating factor synthesis and scavenging of free oxygen radicals.30 The impact of increased lipid peroxidation after fish oil supplementation should be considered when altering the n - 6: n - 3 fatty acid ratio.31 Antioxidant supplementation may be able to counteract the potentially adverse effects of n - 3 fatty acids.

But the evidence shows this can't be true; temperature changes before CO2 in every record of any duration for any time period; CO2 variability does not correlate with temperature at any point in the last 600 million years; atmospheric CO2 levels are currently at the lowest level in that period; in the 20th century most warming occurred before 1940 when human production of CO2 was very small; human production of CO2 increased the most after 1940 but global temperatures declined to 1985; from 2000 global temperatures declined while CO2 levels increased; and any reduction in CO2 threatens plant life, oxygen production, and therefore all life on the planet.

The Molecular Catalysis Project involves directed discovery of homogeneous catalysts for the key reactions involved in solar - fuel generation: oxidation of water to oxygen, reduction of water to hydrogen, and reduction of carbon dioxide to carbon - based liquid fuels and selective intermediates.