[A method of hermetic sealing of glass tubes to be filled with polyacrylamide gel].

A reliable and simple system is suggested for hermetic sealing of glass tubes to be filled with polyacrylamide gel. It consists of a disk made of hydrophobic material (teflon, capronyl), whose diameter corresponds to that of the tube and rubber sleeve with an inner diameter of 1 mm less than that of the tube and disk. In assembly the disk closes the bottom end of the tube and is fixed with the rubber sleeve.