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Freezing and Drying Food
Freezing and drying are two common methods of preventing food spoilage. Ask how to freeze and dry specific foods here.
741 Questions
What is the cubic feet of a Kenmore freezer model 2539232281?
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How did the incas did the food freeze dried?
By removing water from food and drug products, stability and degradation can be reduced. The lower the water content in a food, the longer a food can potentially last. It makes it more difficult for life to grow, by salting and dehydrating food, the food can last longer.
On a side note-
This is often misrepresented online and on children's websites. The Incas did work at high altitudes, with low humidity and lower pressure, but it was not a level that reached sublimation. Think of it as "drying while at freezing temperatures".
The Incas would freeze and then dry their food, in two separate steps, as opposed to "freeze-drying" or the modern pharmaceutical and food term lyophilization. The Incas placed their food in cold climates to freeze at night to store as you would a freezer, and then in the day it would evaporate. This process is closer to dehydration and then a freezing step, and wouldn't remove some of the internal water that modern processes would.
Freeze-drying requires a vacuum and low temperatures ie. drying while at cold temperatures. In order for this to occur, to have the water inside the food go from liquid to gas (sublimation) , a phase diagram shows that it needs to be less than .006 atm, far far below any environmental conditions the Incas could achieve. This value, .006 atm (4.56 mm Hg) is known as the triple point of water, below this pressure, sublimation can occur.
For Instance:
Machu Picchu- 7,970 ft above sea level- lets say they wold climb to 10,000 feet at most for this process.
At 10,000 feet it would about 60.7 kPa air pressure- (526 mmHg or .69 atm)
You can see it is about 100 times too high a pressure to induce sublimation.
You wouldn't call homemade beef jerky freeze dried, you'd call it dehydrated.
It is a smart process, but it is not reminiscent of the way food and drugs are made nowadays. I have worked in this industry and am just pointing out that the it is semantics. A scientist wouldn't refer to this process as "freeze-drying", maybe a comma in between "freeze , drying" would make it work.
How low in temperature should a commercial freezer be?
freezer temperature should be 8c
a refrigerator for safety of food should be operated at 8 degrees or below to prevent contamination
Which ingredients are considered dry ingredients?
In baking recipes, the dry ingredients are flour, baking powder, baking soda, spices, salt, cocoa (if it's used) and anything else that doesn't have moisture in it. Wet ingredients are fat, eggs, vanilla, milk, buttermilk and anything else that has moisture. Sugar is usually catagorized with the wet ingredients because it dissolves. The other dry ingredients (other than salt) don't dissolve but form a suspension.
How long will meat last in the freezer?
For a few years if in an air tight container.
That will depend upon the type of meat. Fatty meats will go rancid in the freezer. So something like bacon or sausage will be good only for a month or two. Pork doesn't last as long as beef. Definitely plan to use frozen meat before a year is up, but sooner is better. See Related Links.
I don't think you can freeze to may kinds of seafood ....i have been looking it up on the net because my husband is a lobster fishermen and we have been looking for ways to freeze his catch ....but all i come up with is you must cook it first then store the lobster.... If anyone know about storing live lobster please share
All seafood must be killed and gutted and cleaned before freezing. If you freeze them live, the contents of the gut will contaminate the flesh. If you cryovac them, they don't have to be cooked. It's especially important to clean bottom feeders as they pick up the most contaminants.Heavy metals sink.
Can glass jars be used in freezer?
Yes. For instance, you can chill a glass that you are going to use for a cold beverage.
Warning: A closed glass container can explode and spread shattered glass all over the inside of your freezer if it is too full. Liquids expand when they freeze, and if there isn't enough room for them to expand inside the container, they will burst out of it.
This can happen with other containers, too, but you won't see the wreckage that you get when it happens with glass. It's the kind of mistake you don't make more than once.
Yes, but it is likely to crack if you fill it up with liquid and then seal it.
NEVER stack two or more glasses in the freezer. Stacked glasses act just like a closed glass container when placed in the freezer and will break, even when there is nothing in them.
Can you freeze stuff mushrooms after cooking?
As with all freezing questions: You can freeze anything, it's the defrosting that is the problem.
Mushrooms contain a lot of water and during the freezing process, the expansion of the ice alters the cell structure.
When they are defrosted, they will not have the same consistency, probably more like mush (no pun intended).
It will be Ok to freeze them, but don't expect them to be the same once defrosted.
Can you freeze homemade casesar salad dressing?
It will probably separate if you freeze it. It should keep well in the refrigerator without freezing.
Can you freeze unbaked stuffing?
Yes. Be sure to make the uncooked stuffing wrap up well to lock in flavor.
Should your freezer temp be adjusted in the winter?
The People I talk to always say have it set at 68 degrees in the winter time
How long can you freeze fresh perch?
1-2 days.
This website is great for checking on how long foods are good for . . .
www.stilltasty.com
How does a self defrosting freezer work?
A self-defrosting freezer operates using a heating element that periodically activates to melt any accumulated frost or ice on the evaporator coils. When the frost melts, the water drains into a pan, usually located at the bottom of the appliance, where it evaporates. This process is typically controlled by a timer or a thermostat that monitors the temperature and frost buildup. As a result, the freezer maintains optimal performance without the need for manual defrosting.
Can you freeze caramel squares?
tecnallly they are a solid so you can but it would very hard harder then usually.
Can food defrosted in the freezer used for cooking?
I have done this before and it does NOT taste as good but it does work. One time I did this, it had a tough texture and then second time was better but, definitely heat it up slowly in the oven.
Can you freeze bacon then thaw and cook and then refreeze?
No, it would not be safe to refreeze bacon, or any food, without cooking it first.
Natural drying is air drying. You can put things out in the sun, or on a well ventilated tray to dry. Natural drying takes longer than other means. However, it does not use energy, and is less expensive.
How cold should a deep freezer be?
Depending on the size of the freezer, the amount of times the door/lid is opened and how good the seals are, anytime between 1 - 3 hours. But it's best to check the temperature of the food regularly
What foods can be freeze dried?
Any food item, from individual ingredients such as strawberries and cooked chicken breast, to fully prepared meals with seasonings and spices, including pasta primavera and beef chow mein, can be successfully freeze dried through commercial freeze drying techniques.
Many grocery retailers and health food stores offer freeze dried foods. Additionally, some survival or camping stores offer freeze dried foods. Wal-Mart and Sam's Club both sell freeze dried items. Other locations a person may purchase these foods from are Buy Emergency Foods, The Ready Store, and North Bay Trading Company.
How long will vacuumed sealed meats stay good in the freezer?
If they remain solidly frozen, virtually forever. Around 20F or less (the temp most non-commercial freezers use), bacterial action zeroes out. Of course, freezing infectged meat won't disinfect it, but if the meate is fresh, then quickly frozen, you're good for a huge amount of time.
A few years ago, a gourmet club in NYC dined on Woolly Mammoth -- one whose corpse had been frozen in Siberia since the last Ice Age. No health problems -- and no commentary on how it tasted either :}
Uh, no that is a myth. No one in modern times have eaten Wooly Mammoth meat.
