heavy hydrogen

heavy hydrogen.

hydrogen (H) [hi´dro-jen]

a chemical element, atomic number 1, atomic weight 1.00797. (See Appendix 6.) It exists as the mass 1 isotope (protium, or light or ordinary hydrogen), mass 2 isotope (deuterium, heavy hydrogen), and mass 3 isotope (tritium).

hydrogen cyanide an extremely poisonous colorless liquid or gas, HCN, a decomposition product of various naturally occurring glycosides and a common cause of cyanide poisoning. Inhalation of the gas can cause death within a minute. Called also hydrocyanic acid.

heavy hydrogen deuterium.

hydrogen ion concentration the degree of concentration of hydrogen ions (the acid element) in a solution. Its symbol is pH, and it expresses the degree to which a solution is acidic or alkaline. The pH range extends from 0 to 14, pH 7 being neutral, a pH of less than 7 indicating acidity, and one above 7 indicating alkalinity. See also acid-base balance.

hydrogen peroxide H₂O₂, an antiseptic with a mildly antibacterial action. A 3 per cent solution foams on touching skin or mucous membrane and appears to have a mechanical cleansing action.

hydrogen sulfide H₂S, a poisonous gas with an offensive smell, released from decaying organic material, natural gas, petroleum, and sulfur deposits, and sometimes used as a chemical reagent.

hydrogen

a chemical element, atomic number 1, atomic weight 1.00797, symbol H. See Table 6. It exists as the mass 1 isotope (protium, or light or ordinary hydrogen), mass 2 isotope (deuterium, heavy hydrogen), and mass 3 isotope (tritium).

hydrogen bonding

weak electrostatic attraction between one electronegative atom and the hydrogen atom covalently linked to a second electronegative atom.

hydrogen breath test

detects hydrogen production as a product of bacterial fermentation of carbohydrates, an indicator of inflammatory bowel disease or carbohydrate malabsorption.

hydrogen cyanide

hydrocyanic acid.

heavy hydrogen

hydrogen having double the mass of ordinary hydrogen; deuterium.

hydrogen ion balance

see acid-base balance.

hydrogen ion concentration

the degree of concentration of hydrogen ions (the acid element) in a solution. Its symbol is pH, and expresses the degree to which a solution is acidic or alkaline. The pH range extends from 0 to 14, pH 7 being neutral. A pH of less than 7 indicates acidity, above 7 indicates alkalinity. See also acid-base balance and ph.

hydrogen peroxide

H₂O₂, used in solution as an antibacterial agent. A 3% solution foams on touching skin or mucous membrane and appears to have a mechanical cleansing action.

hydrogen peroxide-based teat dips

see teat dip.

hydrogen sulfide

an ill-smelling, colorless, poisonous gas, H₂S; much used as a chemical reagent. Hydrogen sulfide is often present in gases from oil wells and from manure vats under slatted floor barns. Poisoning of cattle causes diarrhea, dehydration, dyspnea and death in convulsions. The feces are black and the breath smells of hydrogen sulfide. Called also hydrosulfuric acid. See also manure pit gas poisoning.

hydrogen swell

defective canned meat can. Can is distended due to production of hydrogen as a result of corrosion of the can surface.

Mentioned in	?		References in periodicals archive	?		Medical browser	?		Full browser	?
deuterium heavy water hydrocyanic acid hydrogen hydrogen bonding hydrogen cyanide hydrogen peroxide hydrogen sulfide	In both sets of experiments, the researchers used chilled acetone in which hydrogen atoms had been replaced by deuterium, or heavy hydrogen, which fuses more readily than ordinary hydrogen does. Once-maligned claim rebounds by Weiss, P. / Science News When the heavy hydrogen atoms hit the tritium atoms, energetic neutrons are released at 14 million electron volts of energy. Fast neutron technology used for explosive detection by Sheehy, Christian / National Defense Most difficult of all the obstacles still to be overcome in developing thermonuclear technology is attainment of the extraordinarily high temperatures and pressures necessary to break the nucleus of hydrogen--100 million degrees Celsius for heavy hydrogen (deuterium-tritium) reactions. On the Threshold of a New Atomic Age by Molitor, Graham T. T. / Association Management	heat-labile toxins heat-related death heat-stable toxin heat1 heat2 heated beef heated nebulization heath Heath sheep heather heather blindness heating pattern heatstroke Heaven’s Gate heavenly bamboo heaves Heavily Investigated heavy heavy chain heavy chain disease Heavy Drinker Heavy Drinking heavy eye heavy function Heavy Guns heavy hydrogen heavy metal heavy metal nephropathy heavy metal poisoning Heavy Metal Syndrome heavy metals heavy vaginal bleeding heavy water heavy-chain disease heavy-ion treatment Hebephilia hebephrenia Heberden Heberden's node Heberden's nodes hebetic hebetude hebiatrics heboid paranoia hecateromeric hecatomeric Hecht's pneumonia hect(o)- hect- hectic fever hecto-	heavy guns Heavy H2O Heavy H2O Heavy H2O Heavy H2O Heavy hand Heavy Haul Power International Heavy Haul Truck Network Heavy Heavy Duty Diesel Vehicle Heavy Heavy Low Low Heavy Heavy-Duty Diesel Engine Heavy Heavy-Duty Diesel Truck Heavy Helicopter Heavy High Mobility Multi-Purpose Wheeled Vehicle Heavy High-Density Lipoprotein heavy hitter heavy hitters Heavy Hitters Traffic Net Heavy HMMWV Heavy Hole Exciton Heavy horse Heavy horse Heavy horse heavy horse breeds heavy horse breeds heavy horse breeds heavy horse breeds heavy horse breeds Heavy Horses heavy howitzer heavy hydrogen heavy ice Heavy industrial Heavy industrial Heavy industrial Heavy industrial Heavy industries Heavy industries Heavy industries Heavy industries Heavy Industries and Public Enterprises Heavy Industries Corporation of Malaysia Heavy Industries Taxila Education City Heavy industry Heavy industry Heavy industry Heavy industry Heavy Industry Training Advisory Committee Heavy infantry fighting vehicle Heavy Infantry Fighting Vehicles Heavy Inspection heavy into heavy ion heavy ion Heavy Ion Accelerator Technology Heavy Ion Analytical Facility Heavy Ion Backscattering Spectrometry Heavy Ion Beam Heavy Ion Beam Probe Heavy Ion Driven Inertial Fusion Heavy Ion Elastic Recoil Detection

Mentioned in

References in periodicals archive

Medical browser

Full browser

deuterium
heavy water
hydrocyanic acid
hydrogen
hydrogen bonding
hydrogen cyanide
hydrogen peroxide
hydrogen sulfide

In both sets of experiments, the researchers used chilled acetone in which hydrogen atoms had been replaced by deuterium, or heavy hydrogen, which fuses more readily than ordinary hydrogen does.

Once-maligned claim rebounds by Weiss, P. / Science News

When the heavy hydrogen atoms hit the tritium atoms, energetic neutrons are released at 14 million electron volts of energy.

Fast neutron technology used for explosive detection by Sheehy, Christian / National Defense

Most difficult of all the obstacles still to be overcome in developing thermonuclear technology is attainment of the extraordinarily high temperatures and pressures necessary to break the nucleus of hydrogen--100 million degrees Celsius for heavy hydrogen (deuterium-tritium) reactions.

On the Threshold of a New Atomic Age by Molitor, Graham T. T. / Association Management

heavy guns
Heavy H2O
Heavy H2O
Heavy H2O
Heavy H2O
Heavy hand
Heavy Haul Power International
Heavy Haul Truck Network
Heavy Heavy Duty Diesel Vehicle
Heavy Heavy Low Low
Heavy Heavy-Duty Diesel Engine
Heavy Heavy-Duty Diesel Truck
Heavy Helicopter
Heavy High Mobility Multi-Purpose Wheeled Vehicle
Heavy High-Density Lipoprotein
heavy hitter
heavy hitters
Heavy Hitters Traffic Net
Heavy HMMWV
Heavy Hole Exciton
Heavy horse
Heavy horse
Heavy horse
heavy horse breeds
heavy horse breeds
heavy horse breeds
heavy horse breeds
heavy horse breeds
Heavy Horses
heavy howitzer

heavy hydrogen

heavy ice
Heavy industrial
Heavy industrial
Heavy industrial
Heavy industrial
Heavy industries
Heavy industries
Heavy industries
Heavy industries
Heavy Industries and Public Enterprises
Heavy Industries Corporation of Malaysia
Heavy Industries Taxila Education City
Heavy industry
Heavy industry
Heavy industry
Heavy industry
Heavy Industry Training Advisory Committee
Heavy infantry fighting vehicle
Heavy Infantry Fighting Vehicles
Heavy Inspection
heavy into
heavy ion
heavy ion
Heavy Ion Accelerator Technology
Heavy Ion Analytical Facility
Heavy Ion Backscattering Spectrometry
Heavy Ion Beam
Heavy Ion Beam Probe
Heavy Ion Driven Inertial Fusion
Heavy Ion Elastic Recoil Detection