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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.
What are some functions of the epithelium? The epithelial tissues can do covering, impermeability and protection against the environment, for instance, in the skin, resorption
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is paper broken down by microorganisms
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It is immune difficult mediated hypersensitivity. Typical manifestations contain rheumatoid arthritis, serum sickness, necrotizing etc.
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In 2003 nearly 70 million hectares globally were planted in genetically modi?ed crops. Of these, 73% were plants such as soybean, corn and cotton, which were modi?ed to be he
Functional Problems of implant failures The masticatory efficiency of the implant supported prosthesis depends on the anchorage related factors and the prosthesis related fact
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