hydronium

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hydronium

 [hi-dro´ne-um]
the hydrated proton H3O+; it is the form in which the proton (hydrogen ion, H+) exists in aqueous solution, a combination of H+ and H2O.

hy·dro·ni·um ion

the hydrated proton, H3O+, a form in which hydrogen ion exists in aqueous solutions; also, H3O+·H2O, H3O+·2H2O, etc.
Synonym(s): oxonium ion
References in periodicals archive ?
Carbonic anhydrase inhibitors act in the proximal convoluted tubule (Figure 3, B), and stop the excretion of hydrogen ions in exchange for sodium.
The CitPH1 and CitPH5 genes encode transporter proteins that pump hydrogen ions into the vacuole, a large storage compartment inside juice cells, thus increasing their overall acidity.
At the positive plate, sulfate ions and hydrogen ions in the electrolyte, and the free electrons in solution, react with lead dioxide molecules, forming lead sulfate and releasing two water molecules into the electrolyte solution.
This seeming discrepancy is resolved if there are two independently diffusing hydrogen ions that we denote [H.sup.+](1) and [H.sup.+](2)--one of a larger [D.sup.+]K and the other of a smaller [D.sup.+]K.
The term RTA is applied to a group of defects in bicarbonate reabsorption, hydrogen ion excretion, or both.
3.2 Cross section of an hydrogen ion from photon flux
The observations, made at 3.3 to 3.6 microns, reveal a flurry of hydrogen ions energized by charged particles cascading in from the planet's magnetosphere.
Hydrogen ions from water then diffuse into the glass and exchange with the sodium ions present on the glass surface.
When mineral acids such as hydrochloric acid or hydrobromic acid are added, hydrogen ions protonate the individual components and the structure falls apart.
For hydrogen ions, the concentration is conventionally described as a pH value.
Put it to the test While it is easy to decipher conditions such as drainage, sun and shade, soil pH as a measure of the concentration of hydrogen ions is an altogether different matter.
Stefan Ulmer, a particle physicist at RIKEN in Wako, Japan, and colleagues analyzed antiprotons and negative hydrogen ions (a proton plus two electrons) one by one inside an instrument called a Penning trap.