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Metric for oxygen available at different pressures
Oxygen equivalent compares the relative amount of oxygen available for respiration at a variable pressure to that available at SATP. As external respiration
Oxygen_equivalent
Mass of one equivalent
substance. The equivalent weight of an element is the mass which combines with or displaces 1.008 grams of hydrogen or 8.0 grams of oxygen or 35.5 grams
Equivalent_weight
Chemical element with atomic number 8 (O)
identical with oxygen. During his experiments, performed between 1598 and 1604, Sendivogius properly recognized that the substance is equivalent to the gaseous
Oxygen
Equipment which allows the user to breathe at hypoxic altitudes
sea level. An oxygen partial pressure equivalent to sea level can be maintained at an altitude of 10,000 metres (34,000 ft) with 100% oxygen. Above 12,000
High-altitude breathing apparatus
High-altitude_breathing_apparatus
Method for comparing the narcotic effects of a mixed diving gas with air
equivalently the fraction of the total gases which are narcotic is 1.0. Oxygen is assumed equivalent in narcotic effect to nitrogen for this purpose by some authorities
Equivalent_narcotic_depth
Insufficient oxygen in breathed air
the absence of oxygen, or a low amount of oxygen (hypoxia), rather than atmospheric air (which is composed largely of nitrogen and oxygen). Examples of
Inert_gas_asphyxiation
Measure used to describe relative energy expenditure
roughly equivalent to the energy cost of sitting quietly. A MET also is defined as oxygen uptake in ml/kg/min with one MET equal to the oxygen cost of
Metabolic_equivalent_of_task
Exchange of gases between environment and tissues
Decompression sickness Gas embolism HPNS Hyperbaric oxygen therapy Hypoxia Nitrogen narcosis Oxygen equivalent Oxygen toxicity Respiratory therapy Diffusing capacity –
Respiration_(physiology)
Maximum rate of oxygen consumption as measured during incremental exercise
V̇O2 max (also maximal oxygen consumption, maximal oxygen uptake or maximal aerobic capacity) is the maximum rate of oxygen consumption attainable during
VO2_max
Mars 2020 electrochemical experiment
unused CO 2. Oxygen production was first achieved on April 20, 2021, in Jezero Crater, producing 5.37 grams (0.189 oz) of oxygen, equivalent to what an
Mars_Oxygen_ISRU_Experiment
Class of units of measurement for explosive energy
TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion. A ton of TNT equivalent is a unit
TNT_equivalent
Toxic effects of breathing oxygen at high partial pressures
Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen (O2) at increased partial pressures. Severe cases can
Oxygen_toxicity
Interface between oxygen delivery system and human user
An oxygen mask is a mask that provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover only the nose
Oxygen_mask
Volumetric proportion of oxygen to other constituents in a breathing gas
with oxygen-enriched air, which means a higher-than-atmospheric FIO2. Natural air includes 21% oxygen, which is equivalent to FIO2 of 0.21. Oxygen-enriched
Fraction_of_inspired_oxygen
Use of oxygen as a medical treatment
Oxygen therapy, also referred to as supplemental oxygen, is the use of oxygen as medical treatment. Supplemental oxygen can also refer to the use of oxygen
Oxygen_therapy
Medical condition of lack of oxygen in the tissues
supplemental oxygen reduces the equivalent altitude in climate-controlled rooms. At 4000 m, raising the oxygen concentration level by 5% via an oxygen concentrator
Hypoxia_(medicine)
Severely deficient supply of oxygen
Asphyxia or asphyxiation is a condition of deficient supply of oxygen to the body which arises from abnormal breathing. Asphyxia causes generalized hypoxia
Asphyxia
Equivalent population to produce industrial wastewater
Population equivalent (PE) or unit per capita loading, or equivalent person (EP), is a parameter for characterizing industrial wastewaters. It essentially
Population_equivalent
Amount of substance needed to fully react with a given amount of another
elements, holds that an equivalent is the amount of a substance that will react with 1 g (0.035 oz) of hydrogen, 8 g (0.28 oz) of oxygen, or 35.5 g (1.25 oz)
Equivalent_(chemistry)
Chemical compound
the percent composition that would be equivalent to K2O. Potassium oxide is produced from the reaction of oxygen and potassium; this reaction affords potassium
Potassium_oxide
Device that removes nitrogen from air
An oxygen concentrator is a device that concentrates the oxygen from a gas supply (typically ambient air) by selectively removing nitrogen to supply an
Oxygen_concentrator
Technique used for wastewater treatment
(dm3), I is the current (A), t is the treatment time (h) and 8 is the oxygen equivalent mass. Current efficiency is a time dependent parameter and it decreases
Electro-oxidation
Biological process to convert light into chemical energy
metabolism. The term photosynthesis usually refers to oxygenic photosynthesis, a process that releases oxygen as a byproduct of water splitting. Photosynthetic
Photosynthesis
Chemical reaction involving changes in oxidation state
state of the iron atoms increases as the metal converts to an oxide and oxygen is reduced as it absorbs the released electrons. Redox reactions occur throughout
Redox
Breathing gas, mixture of nitrogen and oxygen
and this depth is less than the actual dive depth for oxygen enriched mixtures. The equivalent air depth is used with air decompression tables to calculate
Nitrox
Chemical compounds with the structure R–O–O–R'
this arrangement results in each atom having the equivalent of 7 valence electrons, reducing the oxygens and giving them a negative charge. This charge
Peroxide
Total number of atoms present in a molecule
molecule of oxygen (O2) is composed of two oxygen atoms. Therefore, the atomicity of oxygen is 2. In older contexts, atomicity is sometimes equivalent to valency
Atomicity_(chemistry)
Mass deposited per unit charge
In Electrochemistry, the electrochemical equivalent (Eq or Z) of a chemical element is the mass of that element (in grams) transported by a specific quantity
Electrochemical_equivalent
Gas used for human respiration
but other mixtures of gases, or pure oxygen, are also used in breathing equipment and enclosed habitats. Oxygen is the essential component for any breathing
Breathing_gas
Method of comparing decompression requirements for air and a given nitrox mix
The equivalent air depth (EAD) is a way of approximating the decompression requirements of breathing gas mixtures that contain nitrogen and oxygen in different
Equivalent_air_depth
Class of organoarsenic compound
are thought to be more toxic due to higher lipophilicity than the oxygen equivalent. Taylor, Vivien F.; Karagas, Margaret R. (June 1, 2022). "Exposure
Arsenolipid
SI unit of amount of substance
1% – this was numerically equivalent to the later standard of oxygen = 16. However the chemical convenience of having oxygen as the primary atomic mass
Mole_(unit)
Triatomic oxygen molecule
the net reaction, three equivalents of water are converted into one equivalent of ozone and three equivalents of hydrogen. Oxygen formation is a competing
Ozone
Smart (producer) bw-11m June 2, 1950 Overview: The Face of Korea c-23m 1980 Oxygen David A. Smart (producer); Therald Moeller c-11m August 29, 1947 Video
List_of_Coronet_Films_films
Increased rate of oxygen intake following strenuous activity
Excess post-exercise oxygen consumption (EPOC, informally called afterburn) is a measurably increased rate of oxygen intake following strenuous activity
Excess post-exercise oxygen consumption
Excess_post-exercise_oxygen_consumption
Equipment allowing or assisting the user to breathe in a hostile environment
available, making oxygen breathing equipment necessary above approximately 3,700 metres (12,000 ft). An oxygen partial pressure equivalent to sea level can
Breathing_apparatus
Process of releasing energy from nutrients using inorganic electron acceptors
oxidizing biological fuels using an inorganic electron acceptor, such as oxygen, to drive production of adenosine triphosphate (ATP), which stores chemical
Cellular_respiration
Medical treatment at raised ambient pressure
barotrauma, and, if pure oxygen is used, a fire hazard. Hyperbaric oxygen therapy (HBOT) is the medical use of greater than 99% oxygen at an ambient pressure
Hyperbaric_medicine
Measure of the amount of oxygen that can be consumed by reactions in a solution
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
Chemical_oxygen_demand
Oxygen needed to remove organics from water
Biochemical oxygen demand (also known as BOD or biological oxygen demand) is an analytical parameter representing the amount of dissolved oxygen (DO) consumed
Biochemical_oxygen_demand
exchange oxygen faster. 10 liters of crystals are "enough to suck up all the oxygen in a room", three times more oxygen than an equivalent sized steel
Oxygen_storage
Microorganism killed by normal atmospheric levels of oxygen
concentrations of oxygen (20.95% O2). Oxygen tolerance varies between species, with some species capable of surviving in up to 8% oxygen, while others lose
Obligate_anaerobe
Breathing gas consisting of oxygen, helium and nitrogen
Trimix is a breathing gas consisting of oxygen, helium, and nitrogen. It is used in deep commercial diving, during the deep phase of dives carried out
Trimix_(breathing_gas)
Approximation for practical capacitors and inductors
inductors in series with a resistance; this resistance is defined as the equivalent series resistance (ESR). If not otherwise specified, the ESR is always
Equivalent_series_resistance
Portable apparatus to recycle breathing gas
(recycling) of the substantial unused oxygen content, and unused inert content when present, of each breath. Oxygen is added to replenish the amount metabolised
Rebreather
Chemical compound derived by removing water from an acid
type of chemical compound composed of two acyl groups bonded to a common oxygen atom. They are commonly formed by the removal of water molecules from a
Acid_anhydride
Medical condition due to rapid exposure to low oxygen at high altitude
conditions, oxygen enrichment can counteract the hypoxia related effects of altitude sickness. A small amount of supplemental oxygen reduces the equivalent altitude
Altitude_sickness
Television and Radio Service Tehnicians / Waiters and Waitresses / Welders Oxygen and Arc Cutters John C. Calhoun (Emerson Film Corp.); Avery O. Craven B&W
List of Encyclopædia Britannica Films titles
List_of_Encyclopædia_Britannica_Films_titles
Gradual destruction of materials by chemical reaction with its environment
means electrochemical oxidation of a metal reacting with an oxidant such as oxygen (O2, gaseous or dissolved), or H3O+ ions ( H+, hydrated protons) present
Corrosion
Tendency for deep-sea species to be larger than their shallower-water relatives
(2013). "Why polar gigantism and Palaeozoic gigantism are not equivalent: effects of oxygen and temperature on the body size of ectotherms". Functional
Deep-sea_gigantism
Life support device for a space suit
Providing breathable oxygen Removing carbon dioxide, humidity, odors, and contaminants from breathing oxygen Cooling and recirculating oxygen through the pressure
Primary_life_support_system
Extrasolar pulsar planet
absence of nitrogen and oxygen. PSR J2322−2650 b orbits approximately 1 million miles from its host star—a distance equivalent to less than 1% of Earth's
PSR_J2322−2650_b
Planned hyperbaric exposure using a specified breathing gas as medical treatment
versions include: 3 oxygen cycles at 60 fsw followed by a minimum of 6 oxygen cycles at 30 fsw. (equivalent to USN Table 6) 4 oxygen cycles at 60 fsw followed
Hyperbaric treatment schedules
Hyperbaric_treatment_schedules
Metalworking technique using a fuel and oxygen
kerosene, etc) and oxygen to weld or cut metals. French engineers Edmond Fouché and Charles Picard became the first to develop oxygen-acetylene welding
Oxy–fuel_welding_and_cutting
Precipitation in the form of ice crystal flakes
contents from their digestive tracts. The ability to survive the absence of oxygen in ice is an additional survival mechanism. Small vertebrates are active
Snow
Safety mechanism designed to extinguish a fire in a medical oxygen delivery tube
a patient on oxygen therapy and stop the flow of oxygen if the tube is accidentally ignited. Oxygen firebreaks are fitted into the oxygen delivery tubing
Oxygen_firebreak
Group of chemical elements
periodic table. This group is also known as the oxygen family. Group 16 consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te)
Chalcogen
replacement] ISO 3001:1999 Plastics — Epoxy compounds — Determination of epoxy equivalent ISO 3002 Basic quantities in cutting and grinding ISO 3002-1:1982 Part
List of ISO standards 3000–4999
List_of_ISO_standards_3000–4999
Chemical compound
reactive oxygen species and the simplest peroxide, a compound having an oxygen–oxygen single bond. It decomposes slowly into water and elemental oxygen when
Hydrogen_peroxide
Antioxidant capacity of a given substance
which use Trolox as a standard include the diphenylpicrylhydrazyl (DPPH), oxygen radical absorbance capacity (ORAC) and ferric reducing ability of plasma
Trolox equivalent antioxidant capacity
Trolox_equivalent_antioxidant_capacity
Aluminium smelter in New Zealand
dioxide as a by-product. The basic reaction is Al2O3 → 2Al + 3"O". Oxygen equivalents react at the red-hot carbon anode, forming a mixture of carbon monoxide
Tiwai_Point_Aluminium_Smelter
Chemical compound of hydrogen and oxygen
mainly of the isotopes hydrogen-1 and oxygen-16, but there is also a small quantity of heavier isotopes oxygen-18, oxygen-17, and hydrogen-2 (deuterium). The
Water
Prefix in organic chemistry nomenclature
position of the oxygen atom can be defined as on carbon atom number two, three or four. However, atoms two and four are exactly equivalent - which can be
Locant
Sealed tent used to simulate a higher altitude with reduced oxygen
altitude with reduced oxygen. Living or training at altitude causes the body to adapt to the lower oxygen content by producing more oxygen-carrying red blood
Altitude_tent
battle with Magetta due to both the rising temperatures and the lack of oxygen above the ring. Vegeta tries to win quickly, but Magetta endures and counters
List of Dragon Ball Super episodes
List_of_Dragon_Ball_Super_episodes
Metalworking techniques used by underwater divers
current wet stick welding, and most underwater metal cutting is immersed oxygen-arc and shielded metal-arc cutting, though other technologies are available
Underwater cutting and welding
Underwater_cutting_and_welding
Gas used as anesthetic and for pain relief
inhaled gas used as pain medication, and is typically administered with 50% oxygen mix. It is often used together with other medications for anesthesia. Common
Nitrous_oxide_(medication)
International Space Station life-support system
pressure equivalent to sea level. Maintaining an Earth-like atmosphere enhances crew comfort and safety, and is significantly safer than a pure oxygen environment
ISS_ECLSS
Form of water
Semiheavy water (HDO) is more common than pure heavy water, while heavy-oxygen water is denser but lacks unique properties. Tritiated water is radioactive
Heavy_water
Term which determines total number of rings and π bonds
number of halogens and N = number of nitrogens, gives an equivalent result. In either case, oxygen and other divalent atoms do not contribute to the degree
Degree_of_unsaturation
Potential heat absorbed by a greenhouse gas
emissions) can be expressed in terms of carbon dioxide equivalent mass or just carbon dioxide equivalent (symbolized CO2e or CO2eq, also denoted CO2-e or CO2-eq)
Global_warming_potential
oxychlorination is a process for generating the equivalent of chlorine gas (Cl2) from hydrogen chloride and oxygen. This process is attractive industrially because
Oxychlorination
Effect of CO₂ on the oxygen binding affinity of hemoglobin
the physicist and Nobel laureate Niels Bohr). Hemoglobin's oxygen binding affinity (see oxygen–haemoglobin dissociation curve) is inversely related both
Bohr_effect
hydrogen, carbon, and oxygen follow the law of reciprocal proportions. The acceptance of the law allowed tables of element equivalent weights to be drawn
Law_of_reciprocal_proportions
Waste treatment pond
surface area of the lagoon should be large enough to provide an atmospheric oxygen transfer rate adequate to prevent anaerobic conditions on the lagoon surface
Facultative_lagoon
Techniques and procedures for safe decompression of divers
decompression at 30 fsw (9 msw), equivalent to a partial pressure of 1.9 bar, and chamber oxygen decompression at 50 fsw (15 msw), equivalent to 2.5 bar. Any dive
Decompression_practice
States of matter for water as a solid
P63/mmc. The distance between oxygen atoms along each bond is about 275 pm and is the same between any two bonded oxygen atoms in the lattice. The angle
Phases_of_ice
that contain O2 as a ligand. The study of these compounds is inspired by oxygen-carrying proteins such as myoglobin, hemoglobin, hemerythrin, and hemocyanin
Transition metal dioxygen complex
Transition_metal_dioxygen_complex
Altitude above which water boils at body temperature
11,900 m (39,000 ft), pure oxygen from an unsealed face mask has a pressure equivalent to the partial pressure of oxygen in regular air at around 3,600 m
Armstrong_limit
Biological system in animals and plants for gas exchange
to be "saturated" with oxygen, and no further increase in the partial pressure of oxygen will meaningfully increase the oxygen concentration of the blood
Respiratory_system
Standard unit of mass for atomic-scale entities
grams of oxygen (O 2). He called that number the Avogadro number in honor of physicist Amedeo Avogadro. The discovery of isotopes of oxygen in 1929 required
Dalton_(unit)
Short text written in English using exclusively Germanic words
Sauerstoff are the modern German words for hydrogen and oxygen, and in Dutch the modern equivalents are waterstof and zuurstof. Sunstuff refers to helium
Uncleftish_Beholding
from incessant high incline traversal and lessening their dependence on oxygen after generations of exposure to the thin mountain air. Even though both
List of Deadliest Warrior episodes
List_of_Deadliest_Warrior_episodes
Slasher Air flight, masks drop down from the panels above the seats - not oxygen masks, but horror movie masks, which three slasher movie killers put on
List_of_Mad_episodes
proposed a connection to dimethyl sulfoxide (DMSO) that had combined with oxygen given in the hospital to make dimethyl sulfate; the conditions of the hospital
List_of_Equinox_episodes
Negative-pressure mechanical respirator
$2,000 in the US in 1930 (equivalent to $39,000 in 2025), and about £1,500 sterling in Europe in the mid-1950s (equivalent to $34,000 in 2025). The cost
Iron_lung
Pressure of a component gas in a mixture
physiology, the partial pressure of a dissolved gas in liquid (such as oxygen in arterial blood) is also defined as the partial pressure of that gas as
Partial_pressure
Chemically inert constituent of a system
does not occur at ordinary temperature, so a system of water, hydrogen and oxygen at 25 °C has 3 independent components. Consider an aqueous solution containing
Component_(thermodynamics)
with their basic pharmacological characteristics, such as half-life and equivalent doses to other benzodiazepines, also listed, along with their trade names
List_of_benzodiazepines
Steel produced prior to the 1940s
century, many steelworks had switched to the BOS process, which uses pure oxygen instead of air. However, as both processes use atmospheric gas, they are
Low-background_steel
Metric unit of mass equivalent to 1,000 kilograms or 1 megagram
atmospheric oxygen is used. Like the gram and the kilogram, the tonne gave rise to a (now obsolete) force unit of the same name, the tonne-force, equivalent to
Tonne
Environmental effects on physiology and mental health
oxygen in the atmosphere. The medical problems that are direct consequence of high altitude are caused by the low inspired partial pressure of oxygen
Effects of high altitude on humans
Effects_of_high_altitude_on_humans
Non-profit organization for promoting standards and knowledge for commercial diving
Thermodynamic model of decompression Varying Permeability Model Equivalent air depth Oxygen window Physiology of decompression Diving environments Underwater
Association of Diving Contractors International
Association_of_Diving_Contractors_International
Chemical species that donates an electron to another species in a redox reaction
removing the oxygen (and the iron). The rate of production of oxygen eventually exceeded the availability of reducing materials that removed oxygen, which ultimately
Reducing_agent
System used for advanced cell culture experiments
and tissues have very individual oxygen requirements. Due to this reason, it is important that the content of oxygen can be adapted in individual perfusion
Minusheet perfusion culture system
Minusheet_perfusion_culture_system
Study of the energy cost of running
energetic cost of running can be quantified through the measurement of oxygen consumption (VO2) during running at a given submaximal speed. During aerobic
Running_energetics
American hitman (1938–2007)
Degelia Jr., a resident of Hearne, Texas. Harrelson was paid $2,000 (equivalent to $18,500 in 2025) for the murder of Degelia, a grain dealer and father
Charles_Harrelson
1994 double murder in Los Angeles, U.S.
29, 2020. "O.J. Simpson jurors reflect on the history-making trial in Oxygen's The Jury Speaks". Entertainment Weekly. Archived from the original on October
Murder of Nicole Brown Simpson and Ron Goldman
Murder_of_Nicole_Brown_Simpson_and_Ron_Goldman
in their first game as a National Football League franchise. April 13 An oxygen tank exploded on the Apollo 13 space flight to the Moon. The three-man crew
Timeline_of_Colorado_history
American reality television series
2006 American reality television series created by Jonathan Murray for the Oxygen network in the United States. The show focused on the altercations and physical
Bad_Girls_Club
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OXYGEN EQUIVALENT
OXYGEN EQUIVALENT
OXYGEN EQUIVALENT
OXYGEN EQUIVALENT
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OXYGEN EQUIVALENT
OXYGEN EQUIVALENT
OXYGEN EQUIVALENT
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