Abstract

A comparison is made between microwave and water-bath thawing on the survival of tissue culture cells which have been frozen to −79 °C, with DMSO and HES protective agents (freezing rate: 20 °C per min). The microwave thawing rates, selected in the range 100–300 °C/min, are comparable to those achieved with a water bath (115 °C/min). Microwave thawing is stopped at various temperatures between 0 and 40 °C, and survival, determined by cell plating indicated that the microwave thawing is acceptable. Survival rates tend to be highest when the rapid microwave thawing terminated at temperatures just above 0 °C.

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