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Define Adsorption chromatography - Basic Separation Technique?
Adsorption is surface interaction and is by number of forces, between surface atoms of solids and molecules of external solute. Adsorption chromatography comprises of systems where active absorption occurs at the surface of the solid stationary medium, often alumina or silica gel. Competition for adsorptive sites occurs between the molecules of the mixture to be separated and the molecules of mobile phase, be it gas or liquid.
The speed of migration of a component will depend on its adsorptive affinity relative to the other species present. A number of attractive forces (Vander Waal forces, hydrogen bonding etc.) between the stationary phase and substances to be separated have been recognized and separation takes place due to differences in these adsorption forces.
In general, which of the following best relates the severity and frequency of natural events, such as storms or droughts? A) Nothing is known about this relationship. B) The severi
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Q. Generally how does a male animal realize that the female is receptive to copulation? In most vertebrate species with internal fecundation the females have reproductive cycle
respiratory system in amphibains
Define drug effects on food intake - Causes Taste Changes? Several drugs can cause an alteration in taste sensation, reduced acuity of taste sensation or leave an unpleasant af
why mung beans has no endosperm while castor bean and maize seed has?
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