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[Use of the UKKM-1M apparatus for the cryopreservation of bone marrow and leukocytes].

The make-up of an installation for programmed congelation of the bone marrow and nuclei-containing blood cells with liquid nitrogen acting the part of a refrigerant is described. Experience gained as a result of a three-year long operation of the unit helped reveal additional conditions of its use that expand the field of its application in freezing other kinds of biological tissues and cells. An important feature of the installation includes the possibility of recording the temperature directly of the tissue undergoing congelation and not that in the freezing chamber.