Sentences with phrase «oxygen conditions found»

Even more revealing, both prehistoric individuals and contemporary Tibetan populations shared beneficial mutations in two genes, EGLN1 and EPAS1, which are implicated in adaptation to low - oxygen conditions found at high altitudes, but EGLN1 adaptations were observed earlier.

Schuerger has tried to grow hundreds of species of bacteria and fungi in the cold, low - pressure and low - oxygen conditions found on Mars.

Not exact matches

If the exercise work rate is free to vary, then experimental interventions such as changes in ambient temperature, oxygen content of the inspired air, energy substrate availability or the provision of incorrect distance feedback all alter the power output (pacing strategy), whereas the rate of increase in RPE has been found to be similar between conditions.13 20 21 24 — 26

Shahrara and her colleagues knew that a protein called CCL28 was found in the body under low oxygen conditions, or hypoxia.

The meteorite, found in 1979, has long been known to contain small amounts of the chemicals nitrate and perchlorate, which could be good or bad for life: To some modern life forms on Earth, perchlorate is toxic, but to others in oxygen - free conditions, and to those in the early days of Earth, it was a source of energy for microbes.

Zeroing in on NANOG, the scientists found that low oxygen conditions increased NANOG's mRNA levels through the action of HIF proteins, which turned on the gene for ALKBH5, which decreased the methylation and subsequent destruction of NANOG's mRNA.

Our new findings tell us that low oxygen conditions actually encourage certain cancer stem cells to multiply through the same mechanism used by embryonic stem cells.»

It also triggers stress response and turns on DNA repair pathways (that are also found in mammals) that allow the worms to better endure adverse conditions such as saltiness, heat, or low oxygen.

The U of G researchers found that it is precisely under conditions of low oxygen that cancer cells trigger the production of cadherin - 22, putting in motion a kind of protein boost that helps bind cells together, enhancing cellular movement, invasion and likely metastasis.

Overall, the research found that the most common type of condition that contributed to brain injuries was damage caused by lack of oxygen to the brain, called hypoxic ischaemic encephalopathy; this is seen mainly in full term babies.

To his surprise, he found that mutations allowing the bacterium to adapt to low - oxygen conditions in the mucus also decrease its susceptibility to antibiotics.

This year researchers found many areas across the Gulf where oxygen conditions were severely low at the bottom and animals normally found at the seabed were swimming at the surface.

The most recent finding: Even short exposures to high elevation can unleash a complex cascade of changes within red blood cells that make it easier for them to cope with low - oxygen conditions.

The researchers also conducted the experiments with the barnacle goose, which migrates at sea - level, and found that they did not have the same ability in low oxygen conditions.

Dr Hawkes, formerly of Bangor University, added: «The wider implications of these findings are for low oxygen medical conditions in humans, such as heart attack and stroke — suggesting what adaptations might help prevent problems in the first place and learning how animals have managed to cope with really extreme environments.»

She found that in anoxic conditions, when there is no oxygen in the bottom layers of the Chesapeake Bay's waters, dissolved methane built up, probably coming from the mud, and when storms mixed up the invisible layers of the Bay's waters, the methane made it to the surface and into the atmosphere.

Desmond Tobin, a cell biologist at the University of Bradford in the U.K., says that the findings, together with a recent study that found that EPO and HIF - 1α levels increase in human hair under low - oxygen conditions, support the notion that human skin responds to oxygen.

The new findings on Arctic Ocean salinity conditions in the Eocene were calculated in part by comparing ratios of oxygen isotopes locked in ancient shark teeth found in sediments on Banks Island in the Arctic Circle and incorporating the data into a salinity model.

His team is currently testing whether these findings are extendable to Mycobacterium tuberculosis, which activates a further predicted hydrogenase under low oxygen conditions.

The team, led by Professor Greg Cook, found that in such conditions the bacterium is able to quickly switch its cellular metabolism from a primarily oxygen - based one over to one that uses fermentation for energy production instead.

Professor Graham Shields - Zhou (UCL Earth Sciences), one of the co-authors and Dr Tostevin's PhD supervisor, said: «We honed in on the last 10 million years of the Proterozoic Eon as the interval of Earth's history when today's major animal groups first grew shells and churned up the sediment, and found that oxygen levels were important to the relationship between environmental conditions and the early development of animals.»

New research on oxygen and iron chemistry under the extreme conditions found deep inside Earth could explain a longstanding seismic mystery called ultralow velocity zones.

Lowest readings of dissolved oxygen were found in late summers, as is the case in other estuaries along the Oregon coast, when incoming salty seawater settles longer in the estuary and warmer, drier conditions reduce the amount of fresh water from the Coos River.

Her research team found that cellular oxidative stress (arising because of reactive oxygen species) increases in mice exposed to THS, damaging proteins, fats and DNA, and leading to hyperglycemia (excess glucose in the blood stream) and insulinemia (excess insulin in the blood)-- a condition also called insulin resistance.

They found that cells under low oxygen conditions were better able to stay stuck only if those same cells had HIF - 1 turned on.

In fact, we found that low oxygen conditions greatly facilitate reprogramming.

The finding has far - reaching implications in understanding and treating low - oxygen health conditions such as coronary artery disease and tumor growth.

Mootha and his team had hoped to find benefits for more moderate low - oxygen conditions, such as intermittent periods of hypoxia or slightly higher levels of oxygen.

Now, scientists at Rensselaer are turning these atmospheric assumptions on their heads with findings that prove the conditions on early Earth were simply not conducive to the formation of this type of atmosphere, but rather to an atmosphere dominated by the more oxygen - rich compounds found within our current atmosphere — including water, carbon dioxide, and sulfur dioxide.

They found that exosomes derived from older children's cells were only reparative if they were subjected to hypoxic conditions (lack of oxygen), while exosomes from newborns» cells improved rats» cardiac function with or without hypoxia.

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