Sentences with phrase «oxygen species scientists»

Not exact matches

After 10 days of smoke exposure, the scientists found an overall increase in DNA damage responses to so - called reactive oxygen species within the cells.

Scientists have been warning that decreasing amounts of available oxygen will increase stress on a range of species, even as they also face the effects of rising temperatures and ocean acidification.

Scientists say reserves can help marine ecosystems and people adapt to five key impacts of climate change: ocean acidification; sea - level rise; increased intensity of storms; shifts in species distribution, and decreased productivity and oxygen availability.

It belongs to a group of chemicals called reactive oxygen species (ROS), which scientists suspect to have a damaging effect on cells and their components.

Reporting this week in the journal Global Change Biology scientists from British Antarctic Survey (BAS) and from Germany's University of Kiel and the Alfred Wegener Institute reveal that when it comes to environmental change the reaction of Antarctic clams (laternula elliptica)-- a long - lived and abundant species that lives in cold, oxygen - rich Antarctic waters — is different depending on how old the animal is.

In addition to some previously described nematodes, which scientists had never before seen living at this extreme depth, the researchers discovered a new species of nematode that subsists on microbes and requires only trace amounts of oxygen.

Technology such as this, scientists said, may have a promising future in the identification and surgical removal of malignant tumors, as well as using near - infrared light therapies that can kill remaining cancer cells, both by mild heating of them and generating reactive oxygen species that can also kill them.

Although the Cambrian explosion generated a large number of new phyla of Earth - type life, it actually crashed in a mass extinction not long after it began when oxygen levels fell and hydrogen sulphide levels rose again so that biodiversity at the family, genus, and species levels was decreasing around 515 million years ago (Gill et al, 2011; and Michael Marshall, New Scientist, January 5, 2011).

During the past years, scientists have found out how ocean acidification — in some cases combined to other factors such as rise in temperatures, eutrophication or loss of oxygen — affects isolated species.

The finding suggests scientists may have been wrong about how Earth's atmosphere got enough oxygen to sustain species (like us) that need this gas to breathe.

Countering the prevailing theory that cellular hydrogen peroxide signaling is broad and non-specific, Whitehead Institute scientists have discovered that this reactive oxygen species (ROS) in fact triggers a distinct signal transduction cascade under control of the mitochondrial respiratory chain — the Syk pathway — that regulates transcription, translation, metabolism, and the cell cycle in diverse cell types.

Some earth scientists call that atmospheric jolt the great Oxygen Catastrophe, because the buildup of oxygen was toxic to most other species at theOxygen Catastrophe, because the buildup of oxygen was toxic to most other species at theoxygen was toxic to most other species at the time.

This knowledge is not new; the same year as Charles Darwin published «The Origin of Species», John Tyndall, an Irish scientist, published a paper in 1859 describing how he measured the absorption of infrared radiation in his laboratory, finding that CO2 and water vapour absorbed the radiation, whereas nitrogen and oxygen, the main gases in the atmosphere, do not.