<prompt> Tyndallization involves steaming at100C for 20 min for 3 consecutive days121C for 15 min for 3 consecutive days126C for 2 mins for 3 consecutive days100C for 20 mins  <response>: Tyndallization involves steaming at 100C for 20 minutes for 3 consecutive days.Used for sterilization of gelatin and egg serum or sugar contaning media. 