how stuff works

http://science.howstuffworks.com/innovation/edible-innovations/10-food-myths.htm

http://science.howstuffworks.com/innovation/edible-innovations/food-preservation3.htm

http://science.howstuffworks.com/innovation/edible-innovations/food.htm

http://science.howstuffworks.com/innovation/edible-innovations/food-preservation8.htm

http://science.howstuffworks.com/innovation/edible-innovations/food-preservation4.htm

http://en.wikipedia.org/wiki/Food_preservation