24 hrs
No, you do not need to refrigerate preserves after opening, but some brands recommend it. However, the high amounts of sugar act as preservatives to help the food last.
Once opened, it should be refrigerated. Then it can last 2-3 months.
Once they are picked from the rose, they last around one day. If they are refrigerated, they can last two or three days.
It will last longer if it is refrigerated.
One homemade food that can last 2 weeks without being refrigerated is cookies. You do need to keep the cookies in a sealed container to keep them fresh.
In theory the time is depends on a number of factors including the air temperature at the time, how cold the food was when refrigeration failed. In practice food that may have been thawed (un refrigerated) is usually thrown out rather than take the chance of food poisoning that may or may not happen if the food is cooked.
3 to 4 days refrigerated
The low temperature in a refrigerator prevents bacteria and other food spoiling microbes from reproducing as quickly. Thus, the food takes much longer to go bad.
Absolutely!
This food will keep for about 5 days in the refrigerator. Place the food in an air tight container for the best results. This food can easily be transferred to the freezer for longer storage time.
If food is put in one of these bags and put in the freezer, food can be saved for a long time. As for things that are suppose to be refrigerated, food in a food saver bag can stay fresh for 2-6 weeks longer than usual.
Butter will be OK for at least a couple days after the power goes off. The concern is more about quality and rancidity, not food pathogens.