ion, ion- +

The movement of charges within a semiconductor due to the displacement of ions within the crystal lattice.

An external source of energy is required to maintain this movement.

An intimate cytoplasmic contact between proximate cells that is mediated by gap junctions; such that electrical content injected into either cell changes the membrane potential of both.

1. A crystal held together by the electric forces between ions, as for a chemical compound that is a salt; such as, sodium chloride.
2. A crystal in which the lattice-site occupants are charged ions held together primarily by their electrostatic interaction.
3. A crystal formed of an array of positive and negative ions held together by electrostatic forces.

A phenomenon whereby ions in ionic compounds in an aqueous solution are freed from their mutual attractions and distribute themselves uniformly throughout the solvent.

1. A condition in which the number of existing molecules dissociating into ions equals the number of new molecules recombining from ions.
2. The condition in which the rate of dissociation of non-ionized molecules is equal to the rate of combination of the ions.

1. In physical chemistry, the contribution that each individual ion makes toward an electrolyte's overall ability to conduct current.
2. The contribution made by each ion species of a salt toward an electrolyte's equiviconductance.

A method of concentrating an electron beam by utilizing the residual gas in a tube: The beam electrons ionize the gas molecules, forming a core of positive ions along the path of the beam which attracts beam electrons and so makes the beam more compact resulting in ionic focusings and gas focusings.

1. A gel that contains ionic groups attached to the colloid structure, preventing the groups from diffusing out into a surrounding medium.
2. A gel with ionic groups attached to the structure of the gel.

The groups cannot diffuse out into the surrounding solution.

A lattice (regularly spaced arrangement of points) with symmetrically arranged ions and a good conducting power.

1. In chemical engineering, a semipermeable membrane that allows the electrophoretic passage (movement of electrically charged particles in a fluid under the influence of an electric field) of ions when an electric field is applied.
2. Semipermeable membrane that conducts electricity; the application of an electric field to the membrane achieves an electrophoretic movement of ions through the membrane; used in electrodialysis.

The ratio of the average drift velocity of an ion in a solution to the magnitude of the electric field causing the drift.

The creation of a net dipole moment in a material when an applied electrical field displaces the cations (positively charged ions) in one direction and anions (negatively charged ions) in the opposite direction.

1. A polymerization process carried out by means of electrically charged ions (either cations [positive ions] or anions [negative ions] that initiate a chain polymerization reaction.
2. Polymerization that proceeds via ionic intermediates (carbonium ions or carbanions) than through neutral species (olefins or acetylenes).

1. In physical chemistry, a measure used to determine the effective range of an ion in a compound, commonly based on the sum of the radii of a pair of oppositely charged ions in a crystal.
2. Radii which can be assigned to ions because the rapid variation of their repulsive interaction with distance makes them repel like hard spheres.

These radii determine the dimensions of ionic crystals.

The ratio by weight of a major constituent of sea water to the chloride ion content.

These ratios are essentially unvarying, giving rise to the principle of constant proportions.