## Answers

1. Cross linked Dextran gel is marketed under the trade name Sephadex and is employed in gel filtration or size exclusion chromatography

Sephadex is prepared by cross-linking of Dextran with epichlorohydrin and by varying the composition the degree of cross linking can be varied for size specific applications.

Dextran is a complex branched polysachharide derived from polycondensation of glucose

Cubot tH It 1H 0W он H OH a H

.
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