HOUSEHOLD HINTS
'(<a href="http://www.j-archive.com/media/2010-02-15_J_28.jpg" target="_blank">Sarah of the Clue Crew brushes the cut surface of an apple.</a>)  Apples brushed with lemon juice <a href="http://www.j-archive.com/media/2010-02-15_J_28a.jpg" target="_blank">don't brown</a>, because the enzymes that cause the apple's oxidation are rendered inactive by this acid, also known as vitamin C'
ascorbic acid