Dump Digest

How Stuff Works: How food preservation works

because food is so conspicuous to our survival, food preservation is identical of the oldest technologies used by human beings. even though we see and use varied of these technologies every day, we often don’t realize how gripping they are. so let’s take a look at some of the scoff preservation technologies that you can find in your conversant with today.

but first a quick oath about why foodstuffs spoils. the basic process is very simple: bacteria invade the food and cause it to rot. food perpetuation technology consequence comes in two different forms. either the technology is dispiriting to gradual down the activity of disease-causing bacteria, or it is trying to kill the bacteria altogether and sterilize the food. a food that is pure contains no bacteria. unless sterilized and sealed, all rations contains bacteria.

the food preservation technology that we are most familiar with is the refrigerator. it takes the “slow bacteria down” approach. for standard, bacteria naturally living in drain will spoil the milk in a few hours if the milk is port side broken on the kitchen counter at room temperature. by putting the milk in the refrigerator you don’t eliminate the bacteria already there, but you do slow down the bacteria ample that the draw off will continue fresh seeing that a week or two. the anyhow holds verified for fruits, vegetables, meats, etc. that you keep refrigerated. in the case of chilled to the bone, the idea is to stop bacterial action altogether. frozen bacteria are completely inactive, so frozen comestibles lasts for months.

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