The researchers found that a change in the oxidation state of the element chromium (from chromium 6 to chromium 3) was linked to the darkening of chrome yellow paint.
The transition metal elements with various oxidation states could be introduced into the catalysts and mortify the performance of catalysts.
The invention not only can effectively purify the oxidation state mercury in the smoke, but also can effectively purify the element state mercury.
The total amount of ion exchange state, carbonate state and ferric-manganese oxidation state has very little effects on full selenium.
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