When sliced the Apple slices are on the air, they become brown. How much is this happening? The most common answer is: due to the fact that the oxygen oxidizes the iron contained in apples. But this is not true. Moreover, there is a way to stop this process, and even Apple slices will remain bright.
One Apple weighing 100 grams contains about 1-2 mg of iron — this is too little to cause such chemical reaction. For this reason, it is not necessary to correct the iron deficiency with the help of Apple, just a waste of time.
Why Apple becomes brown
Apples contain many substances of a group of antioxidants called polyphenols. And when you start to cut it, the polyphenols are oxidized as they appear on the surface of Apple slice, then begin to interact with everything in their way will fall. When the integrity of the Apple is damaged, the oxygen gets access to the action and starts the process, the Apple starts to “rust”.
And why is it actually happening? Apple thus is protected from pests — for example, if the fruit the caterpillar ate. Brown “rust” that forms on the damaged surface of the Apple, heals damage and protects the pulp against penetration of damage inland. It makes the fruit unpalatable to pests and can even cause them digestive disorders.
As noted by environmentalists, apples are one of the most pesticide covered fruits. Therefore, it is recommended to thoroughly wash fruit before eating.
How to keep Apple fresh
But if you cover slices of Apple with lemon juice, the acid which it contains, will retain their original color. Contained in lemon juice acid prevents the oxidation of Apple flesh in the open air — that is, those most polyphenols do not react with oxygen. This simple chemical fact being used in cooking in order to keep an attractive and appetizing appearance of the apples served to the table or used for decorating desserts.
Apples are a good source of vitamin C and beta-carotene. Vitamin C — a powerful natural antioxidant. Eating foods rich in vitamin C helps the body develop resistance to infectious agents and removes from the body harmful, contributing to pathogens, substances.
Fresh apples stored for several days at room temperature. In the fridge they will remain two or even three weeks. But if you decide to cut them and ate at the lemon juice — so they just lie until the end of the day. Important — before eating, rinse them under running cold water.