Breath carbon monoxide: Breath carbon monoxide is the level of carbon monoxide in a person's exhalation. It can be measured in a breath carbon monoxide test, generally by using a carbon monoxide breath monitor (breath CO monitor), such as for motivation and education for smoking cessation and also as a clinical aid in assessing carbon monoxide poisoning.Endothermic gas: Endothermic gas is a gas that inhibits or reverses oxidation on the surfaces it is in contact with. This gas is the product of incomplete combustion in a controlled environment.Carbon–carbon bond: A carbon–carbon bond is a covalent bond between two carbon atoms. The most common form is the single bond: a bond composed of two electrons, one from each of the two atoms.Carboxyhemoglobin: Carboxyhemoglobin (British English: Carboxyhaemoglobin) (COHb) is a stable complex of carbon monoxide and hemoglobin that forms in red blood cells upon contact with carbon monoxide (CO). Large quantities of CO hinders the ability of Hb to deliver oxygen to the body.List of countries by carbon dioxide emissionsDiapolycopene oxygenase: Diapolycopene oxygenase (, crtP) is an enzyme with system name 4,4'-diapolycopene,AH2:oxygen oxidoreductase (4,4'-hydroxylating). This enzyme catalyses the following chemical reactionCarbon nanotube chemistry: Carbon nanotube chemistry involves chemical reactions, which are used to modify the properties of carbon nanotubes (CNTs). CNTs can be functionalized to attain desired properties that can be used in a wide variety of applications.Lights (cigarette type): Cigarettes labeled as “Lights,” “Milds,” or “Low-tar,” are considered to have a “lighter,” less pronounced flavour than regular cigarettes. These cigarette brands may also contain lower levels of tar, nicotine, or other chemicals inhaled by the smoker.Magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase: Magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase (, Mg-protoporphyrin IX monomethyl ester (oxidative) cyclase) is an enzyme with system name magnesium-protoporphyrin-IX 13-monomethyl ester,NADPH:oxygen oxidoreductase (hydroxylating) . This enzyme catalyses the following chemical reactionHeme arginateRichard A Neubauer: Richard Allen Neubauer (16 January 1924–11 June 2007), was a physician known for his work in the use of hyperbaric oxygen therapy.P-AnisidineErythromycin breath test: The erythromycin breath test (ERMBT) is a method used to measure metabolism (oxidation and elimination from the system) by a part of the cytochrome P450 system. Erythromycin is tagged with carbon-14 and given as an intravenous injection; after 20 minutes the subject blows up a balloon and the carbon dioxide exhaled that is tagged with carbon-14 shows the activity of the CYP3A4 isoenzyme on the erythromycin.TemoporfinArteriovenous oxygen difference: The arteriovenous oxygen difference, or a-vO2 diff, is the difference in the oxygen content of the blood between the arterial blood and the venous blood. It is an indication of how much oxygen is removed from the blood in capillaries as the blood circulates in the body.Steptoean positive carbon isotope excursion: The Steptoean Positive Carbon Isotope Excursion (SPICE) was a geological event which occurred about 500 million years ago at the end of the Cambrian Period. The SPICE event was a sudden reversal of the anoxia (lack of oxygen) that had steadily spread throughout the oceans during the Cambrian which also affected the atmosphere.Hemoglobin, alpha 2: Hemoglobin, alpha 2 also known as HBA2 is a gene that in humans codes for the alpha globin chain of hemoglobin.Myoglobin: Myoglobin is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. It is related to hemoglobin, which is the iron- and oxygen-binding protein in blood, specifically in the red blood cells.Hemin (given name)Table of standard reduction potentials for half-reactions important in biochemistry: The values below are standard reduction potentials for half-reactions measured at 25°C, 1 atmosphere and a pH of 7 in aqueous solution.Spectrophotometry: In chemistry, spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength.Allen, D.HemeproteinIsocyanide: An isocyanide (also called isonitrile or carbylamine) is an organic compound with the functional group -N≡C. It is the isomer of the related cyanide (-C≡N), hence the prefix iso.Volumetric heat capacity: Volumetric heat capacity (VHC), also termed volume-specific heat capacity, describes the ability of a given volume of a substance to store internal energy while undergoing a given temperature change, but without undergoing a phase transition. It is different from specific heat capacity in that the VHC is a 'per unit volume' measure of the relationship between thermal energy and temperature of a material, while the specific heat is a 'per unit mass' measure (or occasionally per molar quantity of the material).Metallocene: A metallocene is a compound typically consisting of two cyclopentadienyl anions (Cp, which is C5H5−) bound to a metal center (M) in the oxidation state II, with the resulting general formula (C5H5)2M. Closely related to the metallocenes are the metallocene derivatives, e.Lung receptor: Lung receptors sense irritation or inflammation in the bronchi and alveoli.Metal sulfur dioxide complex: Metal sulfur dioxide complexes are complexes that contain sulfur dioxide, SO2, bonded to a transition metal. Such compounds are common but are mainly of theoretical interest.Burst kinetics: Burst kinetics is a form of enzyme kinetics that refers to an initial high velocity of enzymatic turnover when adding enzyme to substrate. This initial period of high velocity product formation is referred to as the "Burst Phase".Silicon tetrachlorideExhaust gasMethanopyrus: In taxonomy, Methanopyrus is a genus of the Methanopyraceae.See the NCBI webpage on Methanopyrus.Nicotine replacement therapyHydrogen gas porosity: Hydrogen gas porosity is an aluminium casting defect under the form of a porosity or void in an aluminium casting caused by a high level of hydrogen gas (H2) dissolved in the aluminium at liquid phase. Because the solubility of hydrogen in solid aluminium is much smaller than in liquid aluminium, when the aluminium freezes, the dissolved hydrogen gas creates porosity in solid aluminium.Methemoglobin: Methemoglobin (English: methaemoglobin) (pronounced "met-hemoglobin") is a form of the oxygen-carrying metalloprotein hemoglobin, in which the iron in the heme group is in the Fe3+ (ferric) state, not the Fe2+ (ferrous) of normal hemoglobin. Methemoglobin cannot bind oxygen, unlike oxyhemoglobin.Nickel electroplating: Nickel electroplating is a technique of electroplating a thin layer of nickel onto a metal object. The nickel layer can be decorative, provide corrosion resistance, wear resistance, or used to build up worn or undersized parts for salvage purposes.Hydrogenase: A hydrogenase is an enzyme that catalyses the reversible oxidation of molecular hydrogen (H2), as shown below:Carbon dioxide removal: Carbon dioxide removal (CDR) methods refers to a number of technologies which reduce the levels of carbon dioxide in the atmosphere. Among such technologies are bio-energy with carbon capture and storage, biochar, direct air capture, ocean fertilization and enhanced weathering.Exhaust systemBoron trifluorideAir pollution: Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing diseases, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment. Air pollution may come from anthropogenic or natural sources.Carbon disulfide (data page): This page provides supplementary chemical data on carbon disulfide.Animals and tobacco smoke: Animals are exposed to tobacco smoke and other cigarette by-products through their use as experimental subjects and through contact with smokers, as in the case of pets in houses where smoking takes place.Potassium hydrosulfideLeghemoglobin: Leghemoglobin (also leghaemoglobin or legoglobin) is a nitrogen or oxygen carrier, because naturally occurring oxygen and nitrogen interact similarly with this protein; and a hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. It is produced by legumes in response to the roots being colonized by nitrogen-fixing bacteria, termed rhizobia, as part of the symbiotic interaction between plant and bacterium: roots not colonized by Rhizobium do not synthesise leghemoglobin.Clostridium phytofermentans: Clostridium phytofermentans is an obligately anaerobic, rod-shaped, gram-positive bacterium. It forms spherical spores.Motexafin gadoliniumAtmospheric methane: Atmospheric methane is the methane present in Earth's atmosphere. Atmospheric methane concentrations are of interest due to methane's impact on climate change, as it is one of the most potent greenhouse gases in Earth's atmosphere.Indoor air pollution in developing nations: Indoor air pollution in developing nations is a significant form of indoor air pollution (IAP) that is little known to those in the developed world.BilirubinNational Fire Academy: The National Fire Academy (NFA)National Fire Academy Mission Accessed: 6/12/2012 is one of two schools in the United States operated by the Federal Emergency Management Agency (FEMA) at the National Emergency Training Center (NETC) in Emmitsburg, Maryland. Operated and governed by the United States Fire Administration (USFA) as part of the U.Particulates: Atmospheric particulate matter – also known as particulate matter (PM) or particulates – is microscopic solid or liquid matter suspended in the Earth's atmosphere. The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate matter alone.PentachloroethaneBaux score: The Baux score is a system used to predict the chance of mortality due to severe burns. The score is an index which takes into account the correlative and causal relationship between mortality and factors including advancing age, burn size, the presence of inhalational injury.Tobacco cessation clinicPhenylacetyleneTemporal analysis of products: Temporal Analysis of Products (TAP), (TAP-2), (TAP-3) is an experimental technique for studyingIron stress repressed RNA: Iron stress repressed RNA (IsrR) is a cis-encoded antisense RNA which regulates the expression of the photosynthetic protein isiA. IsiA expression is activated by the Ferric uptake regulator protein (Fur) under iron stress conditions.Butyl acetate (disambiguation): Butyl acetate most often refers to n-butyl acetate. However, there are other isomers that may be considered to be butyl acetates:Wood fibre: Wood fibers are usually cellulosic elements that are extracted from trees and used to make materials including paper.Charcoal biscuit: A charcoal biscuit is a biscuit based on a powdered willow charcoal or activated carbon mixed with ordinary flour, and made into dough with butter, sugar and eggs.Two-dimensional infrared spectroscopyOzone Action Day: An Ozone Action Day, which can be declared by a local municipality, county or state, is observed at certain times during the summer months, when weather conditions (such as heat, humidity, and air stagnation) run the risk of causing health problems.Barium orthotitanate: Barium orthotitanate is the inorganic compound with the chemical formula Ba2TiO4. It is a colourless solid that is of interest because of its relationship to barium titanate, a useful electroceramic.Pulmonary interstitial emphysemaNitrogen deficiencyZero field splitting: Zero field splitting describes various interactions of the energy levels of an electron spin (S>1/2) even in the absence of an applied magnetic field. It is important in the electron spin resonance of biological molecules.Gas heater: A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane or butane.Gasoline gallon equivalent: Gasoline gallon equivalent (GGE) or gasoline-equivalent gallon (GEG) is the amount of alternative fuel it takes to equal the energy content of one liquid gallon of gasoline. GGE allows consumers to compare the energy content of competing fuels against a commonly known fuel—gasoline.Natron: Natron is a naturally occurring mixture of sodium carbonate decahydrate (Na2CO3·10H2O, a kind of soda ash) and about 17% sodium bicarbonate (also called baking soda, NaHCO3) along with small quantities of sodium chloride and sodium sulfate. Natron is white to colourless when pure, varying to gray or yellow with impurities.Alkaliphile: Alkaliphiles are a class of extremophilic microbes capable of survival in alkaline (pH roughly 8.5-11) environments, growing optimally around a pH of 10.CO-methylating acetyl-CoA synthase: Acetyl-CoA Synthase (ACS), not to be confused with Acetyl-CoA Synthetase or Acetate-CoA Ligase (ADP forming), is a Nickel containing enzyme involved in the metabolic processes of cells. Together with Carbon monoxide dehydrogenase (CODH), it forms the bifunctional enzyme Acetyl-CoA Synthase/Carbon Monoxide Dehydrogenase (ACS/CODH) found in anaerobic organisms such as archaea and eubacteria.Chronic lung disease