| 摘要 |
<p>PURPOSE:To prevent growth of ice in a cell and enhance survival rate of the cell, by charging the cell into a metallic tube having shorter inside diameter than cell to be frozen and preserved and cooling the cell using a cooling medium. CONSTITUTION:A metallic tube having good thermal conductivity and having smaller inside diameter than diameter of a cell is used as a tube for preserving the cell and the cell is charged into the tube while transforming the cell to directly bring into contact with inside wall of the tube. Then whole tube is cooled to freeze and preserve the cell. When the charge is carried out, a part of inside diameter becoming smaller is further formed in the metallic tube and the cell can be charged in state trapping the cell at the part. By the above- mentioned method, charge of the cell to the metallic tube is made easy, since a change in the pressure of suction of feed occurs when the cell is trapped in the part having smaller inside diameter.</p> |
