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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.
ROL E OF WATER - In general water constitutes 60-90% of protoplasm. Average 80%. It forms 2/3 of human body weight, i.e. 66.66%. Due to electrophillic nature of O, wa
What are the main components of the human skeleton?
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The blood vessels surrounding an acutely inflamed site usually represent progressive vasodilatation from the time of injury.
why is cosmozoic theory considered to be true?
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Which of the following are true for ventilation? A. The problems with ventilation induced by injection of curare occur because of the drug's direct action on nicotinic ACh Rec
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