Sentences with phrase «oxidation of»

Another source of new particle formation in air is the oxidation of organosulfur compounds (OSCs) generated by biological processes and agricultural activities (7 ⇓ ⇓ — 10).

In this scenario, the peak maximum for H2SO4 originates solely from chemistry (oxidation of OSCs forming SO2 that is then converted into H2SO4) and meteorology.

Carozza et al (2011) find that natural global warming occurred in 2 stages: First, global warming of 3 ° to 9 ° C accompanied by a large bolus of organic carbon released to the atmosphere through the burning of terrestrial biomass (Kurtz et al, 2003) over approximately a 50 - year period; second, a catastrophic release of methane hydrate from sediment, followed by the oxidation of a part of this methane gas in the water column and the escape of the remaining CH4 to the atmosphere over a 50 - year period.

Another precursor is methanesulfonic acid (MSA), produced simultaneously with SO2 during the atmospheric oxidation of organosulfur compounds (OSCs), such as dimethyl sulfide.

We introduce a carbon cycle model that would explain the PETM by global warming following a bolide impact, leading to the oxidation of terrestrial organic carbon stores built up during the late Paleocene.

But our study clearly shows that the lower methane concentration allowed for a higher OH concentration, and thus more rapid oxidation of methane.»

There is currently no cogent evidence to support the contention that the globe is warming due to the influence of CO2, control knobs, mental telepathy, or any other reason apart from localised heating due to the oxidation of carbon, conversion losses from things like wind or solar generated electricity, or heat from nuclear decay processes, and so on.

8 - 58): either (i) the IPCC calculation doesn't include the indirect effects of methane on the oxidation of SO2 to sulfur aerosols or (ii) the effects are included, but subsequent research found a smaller effect.

Regarding the Paleocene - Eocene event itself, the field seems to be coming around to the idea that it had something to do with a greatly accelerated oxidation of organic carbon stored on land, perhaps associated with the drying up of interior shallow seaways.

However, the CH4 does not escape the seafloor, because it reacts with SO42 - in pore water via anaerobic oxidation of methane (AOM) to generate HCO3 -.

Suppose we were like humming birds low mass but using oxidation of carbon at a very high rate to convert carbon to CO2 (and eating lots of carbon but it not staying in body long).

He's working on alternatives that don't draw energy from «the oxidation of the carbon backbone, but from their high heats of formation, which are released upon their decomposition.»

Oxidation of hydrocarbon to CO2 releases about 478 kJ / mol C. That's the minimum amount you need to reduce CO2 to liquid fuel assuming perfect conversion.

and 1998 snippets Methane now contributes about 20 % to the increased direct radiative forcing by greenhouse gases compared to preindustrial times [Shine et al., 1995] Oxidation of CH4 in the troposphere produces carbon monoxide (CO), can lead production of ozone (03), and involves atmospheric oxidant, the hydroxyl radical (OH).

However, there seems to have been an additional source of CO2, so the oxidation of organic carbon was just the trigger for the release of even more carbon dioxide.

Forget climate change, has anyone even consider a back of the envelope calculation on how much longer the planetary auto - catalytic oxidation of hydrocarbons can occur?

From the Physical Science Basis: «Shindell et al. (2009) estimated the impact of reactive species emissions on both gaseous and aerosol forcing species and found that ozone precursors, including methane, had an additional substantial climate effect because they increased or decreased the rate of oxidation of SO2 to sulphate aerosol.

Judging by the d13C spike, the PETM was caused by the oxidation of organic carbon, just as we are doing now.

Increased glucagon appears to contribute to development of severe hyperglycemia by mobilizing hepatic stores of glucose and to development of ketoacidosis by increasing the oxidation of fatty acids in the liver.

Rosemary extract prevents the oxidation of fats and protects flavors.

It is also an antioxidant and helps prevent oxidation of fatty acids.

Black tarry faeces indicates the presence of digested blood in the faeces (due to oxidation of iron) which would have originated in the upper gastrointestinal tract, the cause of this may be due to ulcers, infections, tumours, poisons, foreign bodies, platelet disorder, liver or kidney disease, respiratory tract bleeding (being swallowed and passed) or nutrition.

This could also be an issue due to oxidation of the clamp on the battery terminal.

I want to know if parking your 2 wheeler on side stand after a long ride would cause any harm to the engine parts in the sense that the oil from the oil pan would be moved to the other part due to gravity which could leave some parts of the engine which is still very hot without oil and could cause oxidation of those parts.Is this true?

In conclusion caffeine / coffee stimulates the metabolic rate in both control and obese individuals; however, this is accompanied by greater oxidation of fat in normal weight subjects.

Ability of dietary antioxidants to affect lipid oxidation of cooked turkey meat in a simulated stomach and blood lipids after a meal.

That prevents oxidation of the juice.

Inhibition of oxidation of human low - density lipoprotein by phenolic substances in red wine.

TMAO is a gut flora - dependent metabolite resulting from the oxidation of TMA.

Vitamin C also improves the absorption of iron (many individuals with ADHD are low in iron) and prevents the oxidation of fatty acids.

Besides all that, I have also scoured the web (manufacturers specifications sheets, etc.) looking for studies on oxidation of the cholesterol in whey protein concentrate and only turned up one reference on shelf - life and oxidation of the cholesterol; it said the longer the product sits, the more time the cholesterol has to oxidize once the whey protein concentrate was exposed to air.

Lactate, which increases during starvation, can induce hepatic ketogenesis.2 Low - carbohydrate, fat - rich meals can enhance alpha - cell secretion of glucagon and lower insulin concentrations.3, 4 Plasma fatty acid concentrations can be twice as high during low - carbohydrate diets as compared with the usual carbohydrate intake in the postabsorptive period.5 Increased concentrations of free fatty acids in the absence of carbohydrate - induced inhibition of beta - oxidation of fatty acids and in the presence of an abnormally high ratio of glucagon to insulin and elevated concentrations of lactate may have caused ketoacidosis in our patient, who was trying to avoid all dietary carbohydrates.

This little piggy is involved in the regulation of glucose levels and the oxidation of fats.

I've talked before about the «free radical theory of aging» — this concept that aging can be thought of as the oxidation of our bodies, just like rust is the oxidation of metal.

Citrate generated by glycolysis inhibits carnitine palmitoyltransferase complex I, limiting the beta - oxidation of fatty acids and thereby reducing ketogenesis.

The metabolic effects of a ketogenic diet imply a higher - than - usual oxidation of fats, which leads in turn to reduced respiratory exchange ratio values.20, 97 Metabolic carbon dioxide output may be calculated as the product of alveolar ventilation multiplied by the fractional alveolar carbon dioxide concentration.

It reduces platelet aggregation or «stickiness», inhibits oxidation of LDL — the bad cholesterol, and it's anti-inflammatory.

The bulk of the age - related tissue damage classified as «glycation end - products» (or «advanced glycation end - products,» AGE) is produced by decomposition of the polyunsaturated fats, rather than by sugars, and this would be minimized by the protective oxidation of glucose to carbon dioxide.»

Chronic inflammation depletes your antioxidants: Antioxidants are absolutely vital for preventing the oxidation of sebum, and thus preventing blocked pores.

Oxidative phosphorylation refers to the complete oxidation of carbohydrates, fats or proteins.

Burelle, Y., Peronnet, F., Charpentier, S., Lavoie, C., Hillarie - Marcel, C. and Massicotte, D, (1999) Oxidation of an oral [13C] glucose load at rest and prolonged exercise in trained ans sedentary subjects.

While yet to be proven, the free - radical theory of aging states that this neutralization of free radicals can help to slow down the oxidation of your body's cells and slow the onset of age - related diseases and deterioration.

Furthermore, the process causes oxidation of the cholesterol in milk.

Of these amino acids, however, oxidation of only the branched chain amino acids (leucine, isoleucine and valine) appears to be increased during catabolic states such as exercise.

Therefore, ketone bodies flow from the liver to extra-hepatic tissues (e.g., brain) for use as a fuel; this spares glucose metabolism via a mechanism similar to the sparing of glucose by oxidation of fatty acids as an alternative fuel.

Ketone bodies flow from the liver to extra-hepatic tissues (e.g., brain) for use as a fuel; this spares glucose metabolism via a mechanism similar to the sparing of glucose by oxidation of fatty acids as an alternative fuel.

Laboratory and human studies have indicated that cocoa flavonoids can inhibit the oxidation of the low - density lipoprotein (LDL - cholesterol) associated with heart disease.

[7 - 10] The antioxidant activity of L - theanine has been studied in regard to its effect on the oxidation of LDL cholesterol.

Finally, vitamin C can regenerate the antioxidant capacity of vitamin E, which is in turn one of the most important fat soluble antioxidant that supports heart health by preventing the oxidation of cholesterol.

This happens — more or less quickly depending on the individual — once beta - oxidation of fatty acids has increased to a point where fatty acids can't be utilized directly for adenosine triphosphate (ATP) production.