Sentences with phrase «oxidised by»

And about 100 GtC / yr is reduced by photosynthesis, and subsequently oxidised by respiration and combustion, a process that again has been balanced for millennia.

Looking at the carbon fixation - organic material decomposition as a linked process, one sees that some of the carbon fixed by photosynthesis and incorporated into plant tissue is perhaps delayed from returning to the atmosphere until it is oxidised by decomposition or fire.

The scientists found that almost 70 % of the organic carbon initially present in the weathered bedrock had been oxidised by soil microbes, to put, for every square kilometre they measured, somewhere between six and 18 tonnes of carbon back into the atmosphere.

Sebum is most likely to clog skin pores once a compound in it called squalene has been oxidised by free radicals.

It is generated by an enzyme - catalyzed chemoluminescence reaction, wherein the pigment luciferin is oxidised by the enzyme luciferase.

Fuel rods have a zirconium metal coating which can explode when it is oxidised by nitric acid during reprocessing.

Not exact matches

Atmospheric decomposition is initiated by oxidising agents such as ozone or OH radicals (the «atmospheric detergent»), resulting almost exclusively in peroxyl radicals as highly reactive intermediates that can continue to react rapidly with nitric oxide (NO) or other peroxyl radicals.

The chemical composition of promising compounds can then be identified, the researchers say, by taking the relevant bead and exposing it to a strong oxidising agent.

In its oxidised state, carbon forms the greenhouse gas CO2, which is removed from Earth's atmosphere especially by the silicate - carbonate cycle, which acts like a thermostat.

Nitrification, the oxidation of ammonia via nitrite to nitrate, has always been considered to be a two - step process catalysed by chemolithoautotrophic microorganisms oxidising either ammonia or nitrite.

Vitamin C, which also goes by the name L - ascorbic acid, is a potent antioxidant that stops skin from oxidising (skin's take on rusting) in sunlight.

so 80's, people drop dead from oxidised cholesterol, mediated by too much omega 6 plant oil in the diet, and from weak artery walls caused by glycation and calcification, google vitamin K2

It boosts the immune system, protects vision, stops the build - up of oxidised fats, and helps to convert carbohydrates into energy and most crucially reduces the damage done to important cell components caused by reactive oxygen molecules such as free radicals and peroxides7.

If you're a regular reader here then you'll know that oxidised squalene is a big factor behind blocked pores; it forms a by - product called squalene peroxide that both increases sebum production locally and creates big clumps of dead skin cells.

The oil on your face, sebum, can block pores by itself but the real mayhem begins when it oxidises.

needed by xanthine oxidase enzyme, which oxidises purines into uric acid, a protective plasma antioxidant assisting in neutralizing radicals, including those formed during detoxication

By hoovering them up and preventing their oxidising reactions throughout your body, selenium can also lower the general inflammation of your acne.

They can create acne by generating free radicals and oxidising the sebum on your face, and also directly inflaming existing acne and skin cells upon contact.

Chronic inflammation, for example, both causes acne and can worsen cholesterol profiles by oxidising LDL cholesterol.

If it has been treated chemically it damages the oil and changes its structure, reducing the beneficial effects and potentially creating harmful chains of oxidised fats which aren't good for us; they promote an inflammatory response by the body.

This inflammation is created by oxidised sebum.

When sebum oxidises due to assaults by free radicals, it forms a highly comedogenic by - product called squalene peroxide.

You can also catch up the badass beauty of Kareena Kapoor by clinging traditional oxidised jewellery with the attire.

Some of those I'd been most drawn to appeared reduced, hardened and flattened, a little too obvious: the 1973 expanse of white Enamelac on an aluminium base that shows in a thin line down the left - hand side and along the bottom; a row of square pieces from the same year, their fat L - shapes of black (oxidised copper, apparently) set off by smaller white baked - enamel squares; and 1985's Catalyst III, with its steel bolts and thin, intermittent lines of black enamel seeming to divide the aluminium base and contain it in a pointedly incomplete frame.

The Earth's crust (2.2 * 10 ^ 25g) contains 8.3 % by mass of iron, not as FeII as one might expect on a primordial Earth but a mix with oxidised ferric.

The formula used unites all 3 laws of thermodynamics and is usually represented for a chemist or geochemist by the relation DeltaG = DeltaH (enthalpy)- T * Delta S Consider a reaction - C + 2Fe2O3 == 4FeO + CO2 On the left is elemental and reduced C (carbon) and ferric oxide (oxidised iron).

I am certain that creating CO2 by oxidising C causes warming.

Some could be oxidised [broken down] in the water by bacteria, and some could remain in the sediments on the seafloor.»

Inspired by oxidised antique mirror glass, the convex surface displays a shifting pattern of colour.