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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.
How different are reptiles and birds concerning the maintenance of body temperature? Are birds rare in polar regions? Reptiles are heterothermic, i.e., they do not control thei
Q. What are the structures that participate in the human auditory sensitivity? The structures of the human auditory sensitivity are the ears (middle and internal, external) the
SPECIE S CONCEPT - According to Davis and Heywood species define as assemblage of individuals with morphological features in common and separable from other such assembla
The atomic number of argon is 18. Will argon tend to form bonds with other elements? Describe your answer. Argon will not tend to form bonds with other elements. With an atomi
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Define Birth weight - etiological factors for obesity? It has been shown that slow growth of the foetus in utero and during infancy is followed by accelerated weight gain in ch
Of which substances is chromatin made? Chromatin is made of DNA molecules associated to proteins known as histones. Cell Nucleus Review - Image Diversity: chromatin
MA L THU S THEORY OF HUMAN POPULATION GROWTH - Malthus put forward in 1778. 1. Population grows in geometrical ratio, where as the means grow in arithmetical ratio.
The nerve centres which control the body temperature and the urge for eating recontained in: 1. Hypothalamus 2. Pons 3. Cerebellum 4. Thalamus Hypothalamus is the
EGG S OF INSECT This eggs is centrolecithal and it is elliptical. It diameter is 2-3 mm. It has two eggs membrane i.e. vitelline membrane and chitinous capsule. The chit
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