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What (who) is oxygen demand - definition
Chemical oxygen demand
MEASURE OF THE AMOUNT OF OXYGEN THAT CAN BE CONSUMED BY REACTIONS IN A SOLUTION
Chemical Oxygen Demand
In environmental chemistry, the chemical oxygen demand (COD) is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed in mass of oxygen consumed over volume of solution which in SI units is milligrams per litre (mg/L).
Theoretical oxygen demand
CALCULATED AMOUNT OF OXYGEN REQUIRED TO OXIDIZE A COMPOUND TO ITS FINAL OXIDATION PRODUCTS
Theoretical Oxygen Demand; ThOD
Theoretical oxygen demand (ThOD) is the calculated amount of oxygen required to oxidize a compound to its final oxidation products. However, there are some differences between standard methods that can influence the results obtained: for example, some calculations assume that nitrogen released from organic compounds is generated as ammonia, whereas others allow for ammonia oxidation to nitrate.
Demand valve oxygen therapy
USE OF HIGH INHALATION CONCENTRATIONS OF OXYGEN AS MEDICAL TREATMENT
Demand Valve Oxygen Therapy
Demand Valve Oxygen Therapy (DVOT) is a way of delivering high flow oxygen therapy using a device that only delivers oxygen when the patient breathes in and shuts off when they breathe out. DVOT is commonly used to treat conditions such as cluster headache, which affects up to four in 1000 people (0.
Wikipedia
Oxygen demand
Oxygen demand is an environmental chemistry term that may refer to:
Examples of use of oxygen demand
1. Chilbo as the transparency of water there is 8–10 meters and chemical oxygen demand and biochemical oxygen demand are 3 milligrams per a liter.
2. The official environmental monitor also said its key measure of water pollution –– "chemical oxygen demand" or COD –– rose 3.7 percent.
3. But last year sulfur dioxide emissions and chemical oxygen demand, a water pollution index, shot up 1.8 percent and 1.2 percent, respectively.
4. The problem lies with what is called the chemical oxygen demand of the firewater – the amount of oxygen a substance consumes as it breaks down.
5. To satisfy commitments made in 2001 in its Olympic bid, Beijing will be required to show that it meets international standards on four major pollutants _ sulfur dioxide, nitrogen dioxide, inhalable particles and chemical oxygen demand, a measure of water pollution.