Oxidization is a chemical reaction that happens when a substance comes into contact with oxygen. It often causes materials to change color, break down, or rust. Full definition
Tip: To avoid oxidization of the top layer of pesto (when it turns brown and yucky) simply pour a bit of extra oil or water over top while storing. (kimdeon.com)
The most common guacamole preservation hack is placing plastic wrap directly on the guacamole to prevent oxidization. (downshiftology.com)
Not only does this mean that it can juice leafy greens a little more easily, but it also means that the juice will last much longer because less oxidization occurs as a result of the heat from a centrifugal juicer. (deliciouslyella.com)