DEAR DR. BLONZ: My question is about blueberries -- dried blueberries, in particular. I spent a pretty penny for dried blueberries to put on my cereal every morning until a friend told me that dried berries have no antioxidant value. : Dried blueberries -- and other dried berries, such as cranberries, currants and cherries -- are great, and they have considerable nutritional and antioxidant value. In season, I use fresh fruit, but off-season, I use frozen or dried. -- D.C., Lombard, IllinoisDEAR D.C.: Pasteurization and ultra-pasteurization are heat treatments designed to reduce the presence of potentially harmful microorganisms.