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Food Preservation - Canning

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Vansh Patel

on 5 February 2015

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Transcript of Food Preservation - Canning

Food preservation usually involves preventing the growth of bacteria, fungi (such as yeasts), or other micro-organisms (although some methods work by introducing beginning bacteria or fungi to the food).
Food Preservation
What is the shelf life of canned food?
By: Ryan Lancioni, Veronica Partain, Vansh Patel & Gianna Carestia
Why do people can food?
People can food, because if you don't, you would have to rely on out-of-season produce, that comes from far away. If you can fruits and vegetables in their season, then you can enjoy them through the winter. Also, when you can your own food, you know exactly what goes inside the can or jar. When you buy canned food at the store you don't know if there is any hidden products inside.
What foods are able to be canned?
The foods that can be canned, are
Properly canned food stored in a cool, dry place will be in great eating quality for at least 1 year. Canned food stored in a warm place near hot pipes, a range, a furnace, or in indirect sunlight may lose some of its eating quality. Dampness may corrode cans or metal lids and cause leakage so the food will spoil. Don't leave any holes or dents, otherwise bacteria can get in and lower the eating quality.
Does canning alter the food's taste, texture, or appearance?
Yes it does alter the taste and texture, because canning food involves boiling water in or outside the can, and the heat alters the food. It does not alter the appearance.
What is canning?
How is food canned?
Pros and Cons of Canning
Save money
Preserves taste
Preserves Nutrients
Easy to store
Lasts a long period
of time
Doesn't need to be
Easy to open
May contain deadly bacteria
Botulism- a type of food poisoning
Exposure to BPA
Canning is a type of food preservation. There are two different types of canning, water bath canning and pressure canning. Canning has provided a way for people to store food for long periods of time since 1825. We generally think of "cans" as being metal, but any sealable container can serve as a can. Glass jars, for example, can be boiled and sealed.So can foil or plastic pouches and boxes. Milk in a box that you can store on the shelf is "canned" milk.

There are two different ways to can food. One is for meats and vegetables ( pressure canning), and the other is for other types of food ( water bath canning).

1. (Water bath canning) First, unless you are canning small pieces of food like olives, cut food into slices. Then put food into a can with a light syrup and make sure the can is airtight. Next submerge the can in boiling water. Once it is done, canned food can be stored for a very long time.
2.(Pressure canning) First cut the food into pieces and place the food into a can or jar. Then fill the can with boiling water and make sure the can has an airtight seal. After you finish that, canning is done.
Food Preservation - Canning
Fun Facts!
After canning your food, tap the top; you should hear a ringing note. If food is touching the top, this may not occur.
Steel cans are amongst the safest forms of food packaging.
A 40-year-old can of corn was found in the basement of a home in California. The canning process had kept the corn safe from contaminants and from much nutrient loss.
Carbonated soft drink canning began in 1940.

What Do YOU Know About Canning?
What Did You Learn About Canning?
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