small ion

small ion

[′smȯl ′ī‚än]
(meteorology)
An atmospheric ion of the type that has the greatest mobility; and hence, collectively, it is the principal agent of atmospheric conduction; evidence indicates that each ion is a singly charged atmospheric molecule (or, rarely, an atom) about which a few other neutral molecules are held by the electrical attraction of the central ionized molecule; estimates of the number of satellite molecules range as high as 12. Also known as fast ion; light ion.
References in periodicals archive ?
Then the ion viscosity measured at 10 Hz drops by more than one decade, whereas only small ion viscosity changes are observed at 1000 and 10,000 Hz.
As it is a small ion with high mobility when under an electrical field, it is more efficiently extracted than the above-mentioned organic drugs.
It is claimed that the small ion size and charge associated with the silver ions in Axen, coupled with the stabilizing effect of the organic acid, allows the ionic silver to stay in solution without precipitating, thus preserving its efficacy.
These cavities and holes may act as molecular sieves where large molecules or ions inter these channels and become locked there, while small ions like Zn(II) are freely escaped.
Alumina crystals typically host small ions like titanium or chromium, and neodymium ions are too large--they are normally hosted inside a crystal called yttrium aluminium garnet (YAG).
where t is the time, [mathematical expression not reproducible] are the mobility for small positive ions and large positive aerosol ions, respectively, [k.sub.nN] is the attachment coefficient of small ions to aerosol particles, D is the diffusion coefficient, and E is the electric field.
Capillary Electrophoresis Mode Analyte CZE CITP MEKC CGE CIEF Small ions X X Small molecules X X X Peptides X X X X X Proteins X X X X Oligonucleotides X X DNA X Source: Handbook of CE, James Landers by Tim Studt, Editor In Chief
Small ions adapt to this situation by passive diffusion aiming at a balanced situation in which products of paired ions' concentrations (one anion and one cation) are equal on both membrane sides, under the condition that further water movement is prevented by the fixed volume of neighboring fluid departments.
However, it is desirable to have a general screening method for anions to reduce the number of tests required for unknowns and to detect small ions that are difficult to distinguish in a complex matrix.
These nonselective channels allow the movement of small ions as well as large molecules.