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Define Ion exchange chromatography?
In this method a reversible exchange of ions is effected. Usually resins and ionic solutes are the two components involved in ion-exchange. Ion exchange resins are of two types cation and anion exchange resins. The acidic or cation exchange resins contain sulfonic acid groups (SO3H), carboxylic groups (COOH) or phenol groups (OH).
Basic or anion exchange resins contain weakly basic amine groups (NH2) or strongly basic quarternary ammonium groups (NH4)+ OH-. The surfaces of acid resins bind cations such as H, Na+, Ca2+, NH4+. The basic or anion exchange resins carry positive charges on the surface and thus adsorb negative ions.
The holoenzyme is denatured by heat at very high temperature. It is found that two polypeptides, although denatured, contains chains that remain together as a unit, while two other
Q. What are the major events of the final mitotic period? The final mitotic phase is the telophase. In the telophase the following events occur decondensation of chromosomes ea
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Transmission Electron Microscopy The source of illumination in a TEM is a tungsten filament that emits electrons. A vacuum is created to prevent the collision of electrons with a
how many kingdom and phylum are there?
Nucellus - Ovule Enclosed within the integuments lies a homogenous mass of tissue which is termed as the nucellus. This is the tissue in which the female gametophyte differen
What is meant by suction force of the plant cell? Does the suction force facilitate or make difficult the entrance of water into the cell? As the vacuolar solution is hypertoni
Illustrate the theory of Goldman according to corneal transparency. Goldman's Theory: The fibrils are small in relation to light and do not interfere with light transmissi
THEORIES OF AGEING - 1 . Compromise theory. 2 . Wear & tear theory. 3 . Somatic mutation theory. 4 . Immunity theory - Thymus becom
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