A novel open tube with a zwitterionic betaine polymer layer can be prepared by initiated grafting polymerization. This open tube can be used for separating inorganic anions, peptides and proteins. A capillary electrophoresis method and a capillary chromatography method use the novel open tube. There are methods for manufacturing the novel open tube.

 
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< Substituted monocyclic CGRP receptor antagonists

> Antimigraine combination comprising Sapindus and Emblica extracts

> EGF receptor transactivation by G-protein-coupled receptors requires metalloproteinase cleavage of proHB-EGF

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