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The absence of a seal does not prove poor quality

Moreover, high levels of certain metals, like Fe, Ni, and Cu, can initiate oxidative stress by reacting with naturally occurring hydrogen peroxide to produce hydroxyl radicals [82]

J.DongBo CuiE.MinzenbergM

Alnemri ES

Scientifica (Cairo) 2012:428139

Inaccurate concentrations due to improper water volumes lead to under- or overdosing errors in research protocols
