When.com Web Search

  1. Ads

    related to: o2 buildup in water pressure in home

Search results

  1. Results From The WOW.Com Content Network
  2. Geological history of oxygen - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_oxygen

    Photosynthetic prokaryotic organisms that produced O 2 as a byproduct lived long before the first build-up of free oxygen in the atmosphere, [5] perhaps as early as 3.5 billion years ago. The oxygen cyanobacteria produced would have been rapidly removed from the oceans by weathering of reducing minerals, [citation needed] most notably ferrous ...

  3. Great Oxidation Event - Wikipedia

    en.wikipedia.org/wiki/Great_Oxidation_Event

    [13] [53] [2] [54] [55] However, oxygen remained scarce in the atmosphere until around 2.0 Ga, [14] and banded iron formation continued to be deposited until around 1.85 Ga. [13] Given the rapid multiplication rate of cyanobacteria under ideal conditions, an explanation is needed for the delay of at least 400 million years between the evolution ...

  4. Eutrophication - Wikipedia

    en.wikipedia.org/wiki/Eutrophication

    Eutrophication is a general term describing a process in which nutrients accumulate in a body of water, resulting in an increased growth of organisms that may deplete the oxygen in the water. [ 1 ] [ 2 ] Eutrophication may occur naturally or as a result of human actions.

  5. Discontinuous gas exchange - Wikipedia

    en.wikipedia.org/wiki/Discontinuous_gas_exchange

    During the closed phase of discontinuous gas exchange cycles, the spiracle muscles contract, causing the spiracles to shut tight. At the initiation of the closed phase, the partial pressure of both O 2 and CO 2 is close to that of the external environment, but closure of the spiracles drastically reduces the capacity for the exchange of gases with the external environment. [2]

  6. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    This is known as pressure swing adsorption. Oxygen gas is increasingly obtained by these non-cryogenic technologies (see also the related vacuum swing adsorption). [103] Oxygen gas can also be produced through electrolysis of water into molecular oxygen and hydrogen. DC electricity must be used: if AC is used, the gases in each limb consist of ...

  7. What Is Oxygen Bleach? How to Use This Versatile Cleaner - AOL

    www.aol.com/oxygen-bleach-versatile-cleaner...

    Oxygen bleach works best when dissolved in hot water, which activates it; to use oxygen bleach to soak items that call for cold water only, start by dissolving the powder in hot water and allow ...