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.
Foods will stay safely cold 4 to 6 hours in your refrigerator. Hereâs the rule of thumb: If the temperature reaches above 40 degrees, throw out whatâs in your refrigerator and freezer. Your freezer will stay cold for two days if itâs full and one day if itâs half full. A full freezer that is not opened should stay cold for several days. If itâs not full, you can fill it with containers of water to freeze that will fill unused space.