Nickel is a silvery white metal, density 8.9 g/cm 3. Melting point 1455 ℃, boiling point of 2730 ℃. Valence 2 and 3. Qualitative hard, with magnetic and good plasticity. Have a good corrosion resistance, not oxidized in the air, and resistance to alkali. Slowly dissolve in the dilute acid, releasing hydrogen gas and produce green is bivalent nickel ion Ni2 +; The oxidant solution Including nitrate, does not react. Nickel is a medium strength reducing agent. Nickel does not dissolve in water, bivalent nickel may be the main biological type, complex with many substances, chelate reaction in the organism or combination.
Nickel when lack of 6 kinds of dehydrogenation susceptibility to reduce inside liver, including glucose - 6 - phosphate dehydrogenase, lactate dehydrogenase, isocitrate dehydrogenase, malate dehydrogenase and glutamate dehydrogenase. These enzymes involved in generating NADH, anaerobic glycolysis, the carboxy cycle and by the amino acid nitrogen release. And nickel are lacking of liver cells and mitochondria structure changes, especially the Intranet is not neat, mitochondrial oxidative function is reduced.
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