ion exclusion

ion exclusion

[′ī‚än iks‚klü·zhən]
(chemistry)
Ion-exchange resin system in which the mobile ions in the resin-gel phase electrically neutralize the immobilized charged functional groups attached to the resin, thus preventing penetration of solvent electrolyte into the resin-gel phase; used in separations where electrolyte is to be excluded from the resin, but not nonpolar materials, as the separation of salt from nonpolar glycerin.
References in periodicals archive ?
The salinity tolerance mechanisms of Aeluropus species include cellular, organizational, and whole plant adaptations, such as ion compartmentation, presence of salt glands on the leaves, ion exclusion at the root, and ion partitioning in divergent organs.
Ion exclusion uses several different separation modes (gel filtration, ion exchange, and reversed phase) to separate compounds of interest.
The current ion exclusion HPLC method is a multimodal separation, so there are significant limitations on increasing throughput of the method.
In their research, the scientists used a Bio-Rad ion exclusion column, Aminex HPX 87H (300 X 7.
Termed ion-moderated partitioning, this unique process enables these resins to separate compounds via multiple modes of interaction, involving a combination of ion exclusion, ion exchange, ligand exchange, size exclusion, reversed phase and normal phase partitioning.
The HPX-87H columns separate organic acids using primarily the ion exclusion and reversed phase mechanisms.
These include enhanced carbon inputs, root ion exchange and ion exclusion mechanisms, root exudates, and radial oxygen diffusion from roots (Armstrong 1975); hydraulic redistribution of soil water (Caldwell and Richards 1989; Dawson 1993; Burgess et al.
7 or above (Table 2), indicating the importance of shoot saline ion exclusion as a salinity tolerance mechanism in Chloridoid grasses.
Our ion exclusion installation becomes operational this quarter and we are preceding with the closure of our sugar packaging operations at Spreckels, California.
Prevail Carbohydrate ES HPLC Columns offer performance superior to silica-based amino columns and ion exclusion columns.
1985), ion exclusion at the root cortex (Leonard, 1983), ion reabsorption by xylem parenchyma cells (Yeo et al.
Spreckels also introduced a grower incentive program during the quarter, aimed at solidifying its sugar beet supply for the next three years and expects the ion exclusion project, which will increase the extraction of sugar during the production process, to be operational by April 1, 1995.