Final answer:
Ultra Heat Treatment (UHT) is a method of pasteurization that involves exposing milk to high temperatures for a short period of time, allowing it to be stored without refrigeration.
Step-by-step explanation:
Ultra Heat Treatment (UHT) is a method of pasteurization used for milk that involves exposing the milk to high temperatures (around 138 °C) for a short period of time. This process effectively sterilizes the milk, allowing it to be stored for long periods without refrigeration. UHT pasteurization involves heating the milk for 2 or more seconds and then sealing it in airtight containers. The milk can be stored this way for up to 90 days without the need for refrigeration.