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.

With many more households turning to home-grown alternatives for shop-bought herbs, fruit and vegetables - there are more of us than ever with a range of summer fruits spread across our garden ready ...

variety of homemade jams in glass jars - Stephaniefrey/Getty Images Fresh fruit is a natural treat, but when it's converted into a spreadable, sweet-tart jam, there's almost nothing it can't do.

With the holidays near, there is one type of gift I’m always happy to receive — a delicious jar of homemade jam. And here’s the truth: You don’t need to be Martha Stewart or Ina Garten to make ...