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- Oxidation is a reaction involving a transfer of electrons from the substance being oxidizes to the substance doing the oxidizing.
- Typically, a substance being oxidised looses electrons to oxygen and forms a bond with the oxygen atom; hence the term oxidation (see example).
- Oxygen is said to be reduced as its electron number is reduced.
- Grape juice and wine oxidation are a key concerns for the wine maker at all stages of wine production.