| 摘要 |
<p>1308480 Removing sensitizing substances from immunological material LABORATOIRE ROGER BELLON 27 May 1970 [27 May 1969] 25582/70 Heading A5B A process for removing sensitizing materials from materials, e.g. virus vaccines, obtained by disintegrating tissue cells comprises contacting the cell-extract with a liquid, halogenated hydrocarbon which is immiscible with and denser than water and separating the aqueous layer. Examples relate to the cellular extract of hamster renal cells and BHK-21 cells, alone and associated with foot and mouth disease virus, which are treated with such substances as trichlorethylene and "Freon" (Trade Mark) 113 after clarification.</p> |
