Sentences with phrase «from hydroxyl»

High PI and DBI equals short lifespan MLSP despite mitochondrial Glutathione and Thioredoxin trying its best to scavenge membrane Hydroperoxides formation from hydroxyl radical stealing hydrogen atom from unsaturated fatty acids (initiating lipid peroxidation propagation forming highly mutational reactive aldehydes (MDA, MDA - TBARS), alkenals (4 - HNE), methylglyoxals (creating glucosepane, MDA - Lys, CML, pentosidine, CEL, furosine from Amadori).

I've been experimenting with T10 dextran coated iron oxide nanoparticles, obviously not the same as fullerenes, but still a very interesting tool, I've been testing if the coating is giving the particle antioxidant abilities because of it's the (basically) indigestable sugar chains (glucose) creating a high surface area which are largely made from hydroxyl groups, I hypothesised this act's as a «sink» for reactive oxygen species converting them to water.

Not exact matches

That pattern is consistent with implantation via solar wind — the constant bombardment of protons from the sun, which can form hydroxyl and molecular water once emplaced.

«For example, in the future methane levels could increase as a result of increased natural gas and energy use, climate change feedbacks and / or a decrease in the global abundance of the hydroxyl radical, which chemically removes methane from the atmosphere.»

«All three of these molecules are removed by the same process — reaction with hydroxyl,» a radical formed from water in the atmosphere, explains Nobel Prize - winning chemist F. Sherwood Rowland, who participated in the research.

In one scenario, methane's rise may come in part from a drop in hydroxyl, a chemical that acts as an atmospheric detergent; in the other, the gas is emanating from tropical wetlands flooded by heavy rains in recent years.

During synthesis, hydroxyl groups from the water stayed tightly bound to the lead oleate.

This has been a big question for some fifteen years, and the answer washes up in hydroxyl groups from water that had been thought not to be there.

Mavrikakis, assistant scientist Guowen Peng and Ph.D. student Carrie Farberow, along with researchers at Aarhus University in Denmark and Lund University in Sweden, investigated how hydroxyls affect water molecules around them, and how that differs from water molecules contacting a pristine metal oxide surface.

If this is correct, then we could be seeing be a very limited negative feedback from global warming just now which increases hydroxyl concentrations which in turn breaks down the methane faster.

The two most common ways of creating what is a false alkalinity are use of bicarbonates or drinking water from machines that make alkaline water by chemically splitting water into a retained hydroxyl radical that is alkaline and an acid proton that is flushed away.

In the case of alkaline water, hydroxyl radicals are so caustic that the body has multiple mechanisms for preventing such molecules from getting to the cells or systems of the body.

But when you have excessive iron, it catalyzes the formation of excessive hydroxyl free radicals from the peroxide, which decimate your mitochondrial DNA, mitochondrial electron transport proteins and cellular membranes.

These free radicals (such as: superoxide, hydroxyl radical, and peroxynitrite) are controlled by antioxidant systems and when these systems can't cope with the amount of free radicals produced these free radicals scavenge for electrons from proteins, cell membranes, and DNA.

Polysaccharides and glycans are made by the sequential addition of monosaccharides by glycosyltransferase from a reactive sugar - phosphate donor such as uridine diphosphate glucose (UDP - glucose) to an acceptor hydroxyl group on the growing polysaccharide.

[3] In a recent in vitro study, researchers from the department of pathology at Okayama University Medical School in Japan found that Asian ginseng extract inhibited hydroxyl radical formation.

Examples in this category include modified cellulose, in which the hydroxyl groups on the glucose residues have been substituted to varying degrees with alkyl groups such as methyl and propyl; fructooligosaccharides manu - factured from sucrose; and polydextrose synthesized from glucose.

This differs from gases like methane which do have a «real» lifetime due to reactions with hydroxyl radicals, where for any given steady state anthropogenic methane emissions are, a stabilized concentration value will eventually be reached.

Acidic hydrogen ions don't come from nowhere... their other half is the alkaline hydroxyl ion

Third, although many of the individual steps have been established experimentally (18), surprisingly, the mechanism of production of MSA from OSC gas phase oxidation by hydroxyl radicals (OH, daytime) and nitrate radicals (nighttime) remains unclear (31).

Hydroxyl, atmosphere's enthusiastic cleaning agent, proves to be produced in quite stable quantities from year to year.

Additional output from the ACCMIP runs will include concentration / mass of radiatively active species, aerosol optical properties, and radiative forcings (clear and all sky) as well as important parameters that do not directly influence climate such as hydroxyl, chemical reaction rates, deposition rates, emission rates, surface pollutants and diagnostics of tracer transport.

In the Supplementary Report (IPCC, 1992) to the FAR, the indirect chemical effects of CO, NOx and VOC were reaffirmed, and the feedback effect of CH4 on the tropospheric hydroxyl radical (OH) was noted, but the indirect RF values from the FAR were retracted and denoted in a table with «+», «0» or «--».