Sentences with phrase «about oxygen concentration»

The information about oxygen concentration comes from the isotopic composition of carbon or rather from the ratio between the stable carbon isotopes 12C and 13C.

Not exact matches

The nice thing about the digital pulse oximeter is that you can also look to see big changes in your oxygen concentration which may go down if your body has a stress response to a food challenge.

This includes places like parts of the eastern Pacific Ocean where small animals like nematodes and specially adapted fish live on the fringes of habitability, subsisting in waters where oxygen concentrations can be only about 1 % of normal surface water levels.

In places where sea - floor oxygen levels are a bit higher — about 0.5 — 3 % of concentrations at the sea surface — animals are more abundant but their food webs remain limited: the animals still feed on microbes rather than on each other.

This would include low oxygen subsurface sites with environmental conditions predating the Great Oxidation Event that occurred about 2.3 billion years ago when the atmosphere went from very low to high oxygen concentrations.

The vacuum technology described in your article about chicken slaughter reduces the oxygen concentration to lower levels than required for...

For the first - time ever, the oxygen concentrations in the atmosphere rose to about 1 - 10 % of today's.

So your comment about needing to account for individual CO2 molecules are not scientifically valid and the C12 / C13 / C14 proportions as well as the oxygen concentration issue are still valid and correct.

The worst - case result is that mean ocean oxygen concentration falls to a low of about 68 % of pre-industrial levels in the next few millennia, while low - oxygen «dead zones» — which don't support fish or many other marine animals such as crabs and clams — spread nearly six-fold to cover 12.8 % of the sea surface area.