Parathyroid hormone (PTH) function as immunologic mediator has become interesting with the recent usage of PTH analogue (teriparatide) in the management of osteoporosis. Since the early 1980s, PTH receptors were found on most immunologic cells (neutrophils, B and T cells).
But, the refrigerator will only keep food safely cold for about four hours if unopened during a power outage, according to the USDA. A full freezer will hold the temperature for about 48 hours if full (24 hours of half full), the USDA says. Generally, if the temperature in the thermometer in the freezer reads 40 degrees Fahrenheit or below, the food is safe and can be refrozen, according to the USDA.
Perishable food in a refrigerator lasts about four hours without power, as long as the door is kept closed. Opening the door lets some of the cold escape and increases the temperature in the fridge, so keep it closed as long as possible.A refrigerator thermometer helps you keep an eye on the temperature.reezer. Items stored in a freezer compartment will last longer than in the fridge because the temperature is cooler and the items have been frozen. A freezer that's full may keep food cool enough to be safe for 24 hours. Freezer food that thaws to above 40 degrees Fahrenheit for more than two hours should be discarded.