Add Yahoo as a preferred source to see more of our stories on Google. We use strawberry jam as an example to explore the underlying principles of water activity, a key technique for food preservation.

Homemade fruit jam is a delicious, easy way to preserve the flavors of fresh fruits like strawberries, blueberries, or peaches. This recipe combines your favorite fruits with a touch of lemon juice ...

Most jam recipes call for some pectin, but cooked jams do not require the addition of pectin. They simply require careful cooking to ensure proper gelling. However, low-sugar and freezer (uncooked) ...