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Thawing of Frozen Tissue Culture Material - Thawing of the frozen materials is achieved by plunging the vials into water at 37-40°C (thawing rate of 500-750oG min-I) for 90 seconds. The material is then transferred into an ice bath till it is recultured. The thawing has to be rapid in order to avoid ice crystal formation.

Generally, the thawed material is washed several times to remove the cryoprotectant before it is recultured. But the recent trend is to reculture the material in the presence of the cryoprotectant either in diluted (more common) or undiluted state.

The cells/ tissues may be recultured on filter paper discs kept on a suitable culture medium. The disc alongwith cells is frequently transferred to fresh medium; this dilutes the cryoprotectants out. Finally, cells are scraped off the filtered disc and cultured directly on the II medium. At least in some species, this approach is dramatically more successful than others.