Sentences with phrase «presence of oxygen»

In thermochemical conversion, liquid fuels are produced through a process that involves heating wood and bark in the absence or minimum presence of oxygen.

Though moisture can't lead to decomposition on its» own because the organisms basically need the presence of oxygen / air, still it may make the food unpleasant, soggy and tasteless.

remember tho, even if disposables went biodegradable, they would still need the presence of oxygen and aerobic and anaerobic microbes to break down, something in short supply in landfills.

From first principles, this approach can replicate the most obvious example of atmospheric disequilibrium today on our planet — the presence of oxygen and traces of methane (the latter being the gentle exhalations of the once - mighty methanogen biosphere).

Now, new observations of a particular wavelength of infrared light from that galaxy betrays the presence of oxygen atoms that have two electrons missing (in the smaller region depicted in green), researchers report online today in Science.

The process of metabolizing food in the presence of oxygen releases much more energy than most anaerobic pathways.

The presence of oxygen, added by the pore - inducing potassium hydroxide, was far more relevant to the results than either nitrogen or sulfur, they found.

In the presence of oxygen, several types of bacteria, along with a few species of yeast, convert glucose or alcohol to acetic acid; too much of that and a winemaker is left with vinegar.

Dean Pesnell, project scientist for SDO at NASA's Goddard Space Flight Center in Greenbelt, Md., explained why Comet ISON wasn't visible in SDO and what could be learned from that: SDO is tuned to see wavelengths of light that would indicate the presence of oxygen, which is very common in comets.

But modern metabolic reactions are carefully calibrated inside living cells, in the presence of oxygen.

The scientists say that the presence of the oxygen in the copper causes some of the copper to become positively charged and this, in turn, stabilizes the CO2 so that it can bind to water and take on the bent configuration essential to eventually making ethanol.

Besides the migration of lipids during frying, because these oils are subjected to high temperatures (170 ºC) in the presence of oxygen, certain small - scale thermal oxidation may take place in them.

«Too much iron in the presence of oxygen was harmful.

Aluminum boosts a fuel's thrust, but it also degrades quickly in the presence of oxygen, making it difficult to store.

On an alien planet, ozone could be one piece in the puzzle that indicates the presence of oxygen - producing bacteria or plants.

As of now, the reason for the deposits is unknown, but the presence of oxygen in the lunar rock would make those sites attractive for future moon missions, even for human colonies, which could use the oxygen for breathing and as a rocket - fuel component.

The best way to replenish methane in the presence of oxygen is with life.

The researchers made the charge transfer visible using vibrational spectroscopy of adsorbed carbon monoxide (CO; middle of the figure): In the presence of oxygen, a new band (CO@Au (delta +) O2 (delta --RRB- appears in the spectrum.

Because radiation therapy requires the presence of oxygen to be effective, tumors with high interstitial pressure are often less receptive to radiation therapy.

To do so, explains PurGen project manager Tim Bauer, coal is ground up and heated under pressure in the presence of oxygen.

In chlorophyll, modification of one of the side chains helps to stabilise the reduced chlorin ring in the presence of oxygen (chlo - rins without such rings are easy to oxidise).

Hydrogenases are also easily poisoned by the presence of oxygen, which is abundant outside the protective environs of the cells where they normally work.

The printed pattern (example pictured) naturally fades over time in the presence of oxygen but remains visible for several days in normal atmospheric conditions.

It shows that poorly oxygenated waters did not support the complex life that evolved immediately prior to the Cambrian period, suggesting the presence of oxygen was a key factor in the appearance of these animals.

«That assumption is so far entrenched in our thinking that global climate models simply don't allow for methane production in the presence of oxygen.

An international team of researchers has taken a significant step towards understanding the fundamental properties of the two - dimensional material silicene by showing that it can remain stable in the presence of oxygen.

In the presence of oxygen, silver dissolved readily into the glass when temperatures are higher than 650 degrees Celsius, causing more silver to eventually end up at the silicon surface and in turn forming a better contact.

However, Warburg observed that tumors prefer glycolysis even in the presence of oxygen (aerobic glycolysis).

It is a colorless gas that is often produced when bacteria are active without the presence of oxygen.

He added: «It would open an enormous new window on the Universe, allowing you to detect the presence of oxygen if there is any on Earth - like planets around nearby stars.

The presence of oxygen, methane and carbon dioxide, for instance, are widely considered chemical markers of life.

Nitric oxide (NO) is endogenously synthesized by nitric oxide synthases (NOSs) which convert L - arginine to L - citrulline and NO in the presence of oxygen and several cofactors.

The first day of the workshop featured a review of previous work on biosignatures, which initially put forward the presence of oxygen in an exoplanet atmosphere as a strong and almost certain sign that biology was at work below.

That's because tetanus bacteria do not grow well in the presence of oxygen.

Or we burn our fuels in the presence of oxygen in a process we refer to as aerobic respiration.

The ultimate goal is the definition of those metabolic components that might provide mechanisms for the Warburg effect (the observation that cancer cells have high glycolytic activity even in the presence of oxygen).

He was studying bacteria — and those that live only in the presence of oxygen he called aérobie.

The association of TSS with hyper - absorbable tampons is thought to be due to accumulation of blood in the polyester foam cubes and chips of carboxymethylcellulose; the increased vaginal pH in menstruation from 4.5 to 7.4; and the presence of both oxygen and carbon dioxide in the vagina during menstruation.

Warburg discovered that in the presence of oxygen, cancer cells overproduce lactic acid.

Respiration can occur in the mitochondria in the presence of oxygen (aerobic respiration) or it can occur in the intercellular fluid in the absence of oxygen (anaerobic respiration).

The word aerobic literally means «with oxygen» or «in the presence of oxygen, involving or improving oxygen consumption by the body.»

Those probiotics will not do anything to your skin if applied as yogurt because they can not survive in the presence of oxygen; they are the anaerobes.

However, with enough glucose, various yeasts can produce ethanol in the presence of oxygen.

They don't normally live in the environment because they are sensitive to the presence of oxygen, UV light and other chemicals found in the natural environment.

Dr. Warburg showed that cancer cells, even in the presence of oxygen, preferentially ferment sugar for energy, and believed this metabolic dysfunction to be the primary cause of cancer, not just a symptom.

It's understandable: the aerobic system burns fats in the presence of oxygen in order to provide long - term energy for the body — exactly what it needs for endurance.