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What causes apples to brown?

tyrosinase

tyrosinase

tyrosinase
Tyrosinase, an enzyme that catalyses the oxidation of phenols and is widespread in plants and animals
wikipedia
oxidation

oxidation

oxidation
oxidation (the loss of electrons by a chemical reactant - such as when combining with oxygen)
wikipedia
What is the cause of the fact that apple, the substance of which apples are made regularly performs the action become brown, to turn from the original colour to the colour brown?
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i think its something to do with iron and air
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Posted at 5:19 on April 19, 2010.
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i dont know
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Posted at 5:18 on April 19, 2010.
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External web pages (using standard web search):

TLC Cooking "Why do apples and potatoes turn brown when you slice ...
The enzyme then has access to oxygen in the air and it does its thing, turning the fruit brown. This is the same thing that causes brown spots in apples when you drop them.
http://recipes.howstuffworks.com/question168.htm
What Makes Apples Turn Brown? - Ask.com
Apples turn brown by being exposed to air for prolonged periods of time. The other reason why it would turn brown is if it is rotten or bruised. They turn ... Read more.
http://www.ask.com/q/What-Causes-Apples-to-Turn-Brown
What Are the Causes of Brown Spots on Apple Skins? | eHow.com
What Are the Causes of Brown Spots on Apple Skins?. Apples are firm, round fruits with smooth red, green or yellow skin and pale flesh that grow on perennial trees in the rose ...
http://www.ehow.com/list_7427638_causes-brown-spots-apple-skins_.html
How to Keep Apples from Turning Brown
What causes apple flesh to brown? How to keep apples from turning brown after cutting them? Leaf through this article to get an insight about reducing browning ...
http://www.buzzle.com/articles/how-to-keep-apples-from-turning-brown.html
Why do apple slices turn brown after being cut?: Scientific American
... addition, both fruit juices are acidic and the lower pH that they bring about causes ... captain obvious! u just helped me and my science partner figure out why do apples turn brown ...
http://www.scientificamerican.com/article.cfm?id=experts-why-cut-apples-...

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Other ways this question is asked:

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