Breathing gas
A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. The essential component for any breathing gas is a partial pressure of oxygen of between roughly 0.16 and ...
Breathing gas - Wikipedia
Earth's Atmospheric Oxygen Levels Continue Long Slide
Atmospheric oxygen levels have declined over the past 1 million years, although not nearly enough to trigger any major problems for life on Earth, a new study finds.
'Wonder material' sucks oxygen out of room and could help us breathe UNDERWATER
Researchers in Denmark have developed a 'wonder material' that absorbs and stores huge amounts of oxygen. Using cobalt as the main ingredient, researchers from University of Southern Denmark cooked up...
Variations In Atmospheric Oxygen Levels Shaped Earth’s Climate Through The Ages
Variations in the amount of oxygen in Earth's atmosphere significantly altered global climate throughout the planet's history. Efforts to reconstruct past climates must include this previously overloo...
Why there is so little breathable oxygen in space
A down-to-Earth experiment solves an astronomical mystery. You breathe it every minute, but there's hardly any molecular oxygen—otherwise known as O2—in space. In 1998, NASA even launched a satellite ...
Oxygen
Our updated Oxygen video features new footage displaying the paramagnetism of liquid oxygen. More chemistry at http://www.periodicvideos.com/ Follow us on Fa...
Earth's Atmospheric Oxygen Levels Continue Long Slide
Atmospheric oxygen levels have declined over the past 1 million years, although not nearly enough to trigger any major problems for life on Earth, a new study finds.
Electro-galvanic fuel cell
An electro-galvanic fuel cell is an electrical device, one form of which is commonly used to measure the concentration of oxygen gas in scuba diving and medical equipment.
A chemical reaction occu...
Electro-galvanic fuel cell - Wikipedia
Oxygen
Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element and oxidizing agent t...
Oxygen - Wikipedia
Nitrous oxide and oxygen
A mix of nitrous oxide 50% and oxygen 50% is a medical analgesic gas, commonly known as Entonox (a registered trademark of BOC) or Nitronox, or colloquially as "gas and air", and is frequently used in...
Nitrous oxide and oxygen - Wikipedia
Oxygen evolution
Oxygen evolution is the process of generating molecular oxygen through chemical reaction. Mechanisms of oxygen evolution include the oxidation of water during oxygenic photosynthesis, electrolysis of ...
Hydrox (breathing gas)
Hydrox, a gas mixture of hydrogen and oxygen, was used as a breathing gas in very deep diving. It allows divers to descend several hundred metres.Precautions are necessary when using hydrox, since mix...
Membrane method
The Membrane method or mixing by gas separation is a method of gas blending to produce nitrox, a breathing gas mostly used for scuba diving.Nitrox systems use semi-permeable membranes to separate out ...
Oxygen sensor
An oxygen sensor (or lambda sensor) is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analysed.It was developed by the Robert Bosch GmbH company during the...
Oxygen sensor - Wikipedia
Hydrogen narcosis
Hydrogen narcosis (also known as the hydrogen effect) is the psychotropic state induced by breathing hydrogen at high pressures. Hydrogen narcosis produces symptoms such as hallucinations, disorienta...
Compressed air
Compressed air is air kept under a pressure that is greater than atmospheric pressure. It serves many domestic and industrial purposes.In Europe, 10 percent of all industrial electricity consumption i...
Nitrox
Nitrox refers to any gas mixture composed (excluding trace gases) of nitrogen and oxygen; this includes normal air which is approximately 78% nitrogen, 21% oxygen, and 1% other gases, primarily argon...
Nitrox - Wikipedia
Mitochondrial ROS
Mitochondrial ROS (mtROS or mROS) are reactive oxygen species (ROS) that are produced by mitochondria. Generation of mitochondrial ROS mainly takes place at the electron transport chain located on the...
Mitochondrial ROS - Wikipedia
Δ18O
In geochemistry, paleoclimatology and paleoceanography δO or delta-O-18 is a measure of the ratio of stable isotopes O:O (oxygen-18:oxygen-16). It is commonly used as a measure of the temperature of ...
Hypoxia-activated prodrugs
Hypoxia-Activated Prodrugs (HAPs) are prodrugs that target regions of tumor hypoxia within tumor cells. HAPs may offer the potential, alone and in combination with conventional chemotherapy, of improv...
Bottled oxygen
Bottled oxygen is oxygen in bottles, such as for high-altitude climbing. Bottled oxygen may be for a breathing gas.When Tenzing and Hillary made the first successful summit of Mount Everest in 1953 th...
Maximum operating depth
In underwater diving activities such as saturation diving, technical diving and nitrox diving, the maximum operating depth (MOD) of a breathing gas is the depth below which the partial pressure of oxy...
Helium analyzer
A Helium analyzer is an instrument used to identify the presence and concentration of helium in a mixture of gases. In Technical diving where breathing gas mixtures known as Trimix comprising oxygen, ...
Helium analyzer - Wikipedia
Heliox
Heliox is a breathing gas composed of a mixture of helium (He) and oxygen (O2).Heliox is a medical treatment for patients with difficulty breathing. The mixture generates less resistance than atmosph...
Oxygen–haemoglobin dissociation curve
The oxygen–hemoglobin dissociation curve plots the proportion of hemoglobin in its saturated form on the vertical axis against the prevailing oxygen tension on the horizontal axis. The oxyhemoglobin d...
Cascade storage system
A cascade storage system is a high pressure gas cylinder system which is used for the refilling of smaller compressed gas cylinders or air cylinders. Each of the large cylinders is filled by a compres...
Cascade storage system - Wikipedia
Gas blending
Gas blending is the process of mixing gases for a specific purpose where the composition of the resulting mixture is specified and controlled.A wide range of applications include scientific and indust...
Gas blending - Wikipedia