hydrogen ion


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ion

 [i´on]
an atom or group of atoms having a positive (cation) or negative (anion) electric charge by virtue of having gained or lost an electron; substances forming ions are called electrolytes. adj., adj ion´ic.
dipolar ion an ion that has both positive and negative regions of charge.
hydrogen ion the positively charged hydrogen atom (H+), which is the positive ion of all acids. See also hydrogen ion concentration.
hydroxyl ion the negatively charged group, OH, present to excess in alkaline solutions.

hy·dro·gen ion (H+),

a hydrogen atom minus its electron and therefore carrying a unit positive charge (that is, a proton); in water, it combines with a water molecule to form hydronium ion, H5O2+, H7O3+, etc.

hydrogen ion [H+]

a positively charged hydrogen atom or proton.

hy·dro·gen ion

(H+ hī'drō-jen ī'on)
A hydrogen atom minus its electron and therefore carrying a unit positive charge (i.e., a proton); in water, it combines with a water molecule to form the hydronium ion, H3O+.

hydrogen ion

A free proton, which is the positively charged nucleus of a hydrogen atom.

ion

an atom or group of atoms having a positive (cation) or negative (anion) electric charge by virtue of having gained or lost one or more electrons. Substances forming ions are electrolytes.

ion channel
see channel.
dipolar ion
zwitterion.
hydrogen ion
the positively charged hydrogen atom (H+), present to excess in acid solutions.
ion pair
the pair of ions created when an atom has had an electron removed by ionizing radiation.
ion pump
see calcium pump, sodium pump.
ion trapping
a strategy for treatment of poisonings based on the principle that cell membranes are less permeable to ionized compounds. With knowledge of the characteristics of the toxin, treatment can be given to alter the acid-base balance in favor of ionization.
References in periodicals archive ?
On the continuous absorption coefficient of the negative hydrogen ion.
Hydrogen ion Tube Dilution concentration pH (predicted) pH (observed) 1 1x 2 10x 3 100x 4 1000x 5 10000x
When CO2 accumulates, there is shift in the bloods' bicarbonate buffering system in the direction of hydrogen ions and bicarbonate.
For hydrogen ions, the concentration is conventionally described as a pH value.
Base excess or base deficit is an indication of the amount of anionic compound and hydrogen ion in the patient's blood compared to the "normal" level for that patient.
Using a SiGen Plasma Immersion Ion Implantation (PIII) system, researchers at Silicon Genesis have developed a novel plasma condition that greatly enhances hydrogen ion specie concentration.
The targets occur adjacent to hydrogen ion partial extraction and mercury vapor geochemical anomalies.
When they added hydrogen gas, the acid and hydrogen ion formed a boron-hydrogen bond that can then be used to shatter a stable CO2 molecule, which further reacts with hydrogen to form methanol and water.
With this process, using hydrogen ion implantation as an atomic scalpel, thin slices of monocrystalline film can be cut from a donor wafer and transferred on top of a receiving wafer.
Existing facilities and equipment include: extensive cryogenic facilities and superconducting magnet tooling and test equipment in the Magnet Development Laboratory, the Magnet Test Laboratory and the Accelerator System String Test Facility; the Central Facility, a 550,000 square foot building including office/training space, shop/lab space, a well-equipped machine shop, a liquid helium refrigerator and warehouse space; buildings for the linear accelerator as well as its negative hydrogen ion source and 2.
With the correct answer of "extract a hydrogen ion from water," Lubbock High School from Lubbock, Texas, captured the second annual National Science Bowl at the Department of Energy (DOE) in Washington, and defended the title they also won last year.
It measures the concentration of hydrogen ions to measure the acidity level in the blood.