LECTURE: 09. Title: T- LYMPHOCYTES PRODUCTION AND MATURATION. LEARNING OBJECTIVES: The student should be able to: â¢ Describe the anatomical feature of the thymus in relation to the mechanism. of T-cell maturation. â¢ Enumerate the type of cells inside the thymus, and identify their locations. â¢ Identify the type of cell in the thymus which is rich in the MHC II molecules. â¢ Describe the mechanism of migration during the T-lymphocyte maturation. in the thymus starting form: - Sub-capsular region (blast, and nurse cells).
What to do about your food if the POWER goes out! Do not open the refrigerator or freezer. Tell your little ones not to open the door. An unopened refrigerator will keep foods safely cold. for about 4 hours. A full freezer will hold the temperature for approximately 48 hours, 24 hours if it is half full. If it looks like the power. outage will be for more than 2-4 hours, pack refrigerated food items such as milk, dairy products, meats, eggs, and left-overs into a. cooler surrounded by ice. Try to obtain block or dry ice to keep your refrigerator as cold as possible. If it looks like the power. outage will last for several days, 50 pound of dry ice should hold an 18-cubic foot full freezer for 2 days. Plan ahead and know where. you can buy block ice or dry ice.
Is food in the refrigerator safe during a power outage? It should be safe as long as power is out no more than 4 hours. Keep the door closed as much as possible. Discard any perishable food (such as meat, poultry, fish, eggs, and leftovers) that have been above 40 Â°F for over 2 hours. Never taste food to determine its safety!