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Dissolved oxygen

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Title: Dissolved oxygen  
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Subject: Aquaculture, Extinction event, Barton Springs salamander, Water quality, Activated sludge, Anaerobic digestion, Fishkeeping, Wastewater quality indicators, Water aeration, List of energy abbreviations
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Dissolved oxygen

Oxygen saturation or dissolved oxygen (DO) is a relative measure of the amount of oxygen that is dissolved or carried in a given medium. It can be measured with a dissolved oxygen probe such as an oxygen sensor or an optode in liquid media, usually water. The standard unit is milligrams per litre (mg/l) or parts per million (ppm).

Oxygen saturation can be measured regionally and non-invasively. Arterial oxygenation is commonly measured using pulse oximetry. Tissue saturation at peripheral scale can be measured using NIRS. This technique can be applied on both muscle and brain.

Oxygen in medicine

Main article: Oxygenation (medical)

In medicine, oxygen saturation refers to oxygenation, or when oxygen molecules (Template:Chem/link) enter the tissues of the body. In this case blood is oxygenated in the lungs, where oxygen molecules travel from the air and into the blood. Oxygen saturation, or (Template:Chem/link) stats measure the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. Fish, invertebrates, plants, and aerobic bacteria all require oxygen for respiration. Blood is also vital to the body system.

Environmental oxygen saturation

Oxygen saturation in the environment generally refers to the amount of oxygen dissolved in the soil or bodies of water. Environmental oxygenation can be important to the species.

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