It occurs as an oxidation product of primary lead sulfide ore, galena.

During that time, he started his research on oxidation products of cinchonine and nicotine alkaloids.

The reactions break down some of the fats in the meat to form primary oxidation products.

Allergic reactions may be due to the various oxidation products that are formed by exposure of the oil to light and/or air.

It is an oxidation product of other copper minerals, especially under arid, saline conditions.

In used fluids the oxidation products can be toxic as well.

It occurs as an oxidation product of molybdenum bearing ore deposits.

It occurs as an oxidation product of hydrothermal lead-bearing veins.

It is an oxidation product of lignite, associated with near-surface mining.