When you cut open an apple, oxygen in the air combines with enzymes in the fruit to turn the meat of the apple brown. Krochta's microthin film could prevent this. Made of milk or cereal proteins proteins plus ascorbic acid (vitamin C),it almost becomes part of the fruit, providing enough protection to keep moisture in and oxygen out, but allowing flavor to get through.
"You could have, for instance, apples that are washed, peeled, packageg, and sliced, ready to eat or put right in a piecrust, " says Krochta.
Krochta's statement at the end of the passage is intended to.....