Food Preservation and Contamination Food Preservation and Contamination by Lianna Annail Food preservation is either slowing down the activity of disease causing bacteria or killing the bacteria altogether. Some ways you preserve food will kill enzymes also.
Enzymes are a protein naturally found in food that can make it spoil or change color.
They are fragile. They are destroyed when heated to 150 degrees F. Sterile food has no bacteria. Bacteria is found in food if it hasn't been sterilized. These are the most popular ways. It slows bacteria to a crawl to prevent spoiling.