1. Conclusion Tyrosinase activity acidum vitamin A.

2. Biochemical characteristics of tyrosinase in Musca domestica were studied.

3. Methods: Tyrosinase activity in vitro was measured by the rate of oxidation of L - Dopa.

4. The noncompetitive inhibition of taurine on tyrosinase was determined with l-tyrosine as substrate.

5. Objective:To evaluate the influence of icariin on tyrosinase activity and melanogenesis of human epidermal melanocytes.

6. Efficiencies: Powerfully permeate skin's deep layer, restrain tyrosinase, resist free radical, smoothen wrinkle, activate dull and tired skin, leave skin crystal, hydrated, delicate and smooth.

7. The results show that the inhibition of tyrosinase by arbutin is a reversible reaction with remaining enzyme activity.

8. The impact of nicotinamide on the activity of tyrosinase, as well as the impact on the proliferation rate of human melanocytes, cell cycle kinetics and melanogenesis were studied.

9. As a general approach of depigmentation, typical tyrosinase inhibitors and their against melanin synthesis were introduced.

10. Combined with the human tyrosinase gene sequence, the gene tree was constructed using parsimony method.

11. To study the regulation of proliferation, melanogenesis and tyrosinase activity in the responese of B16F murine melanoma cells to Radix Scutellariae.

12. A tyrosinase biosensor based on a boron-doped diamond (BDD) electrode as the base electrode has been developed.

13. Methods Tyrosinase activity was estimated by measuring the rate of oxidation of DL-dopa.

14. An amperometric tyrosinase biosensor for phenolic compounds was developed via a simple and effective immobilization method.

15. In human being, tyrosinase is the key enzyme for melanin biosynthesis, and is associated with melanin hyperpigmentation such as melasma, freckles, ephelide, senile lentigines.

16. Tyrosinase performs action for catalytic oxidation of L-tyrosine and L-dopa to form melanin.

17. Ethanol extracts of schisandra, wild ageratum pollen had the stronger inhibitory activity of tyrosinase to oxidize diphenol.

18. Vitamin P can enhance the effect of vitamin C, suppress tyrosinase that darkens the skin, and treat black spots, freckles, etc.

19. Objective: To study the regulation of proliferation, melanogenesis and tyrosinase activity of B16F murine melanoma cells in response to 8-MOPL.

20. For example, albinism results from a mutation that inactivates a gene called tyrosinase, which is vital to black pigment formation.

21. Objective: To study the regulation of proliferation, melanogenesis and tyrosinase activity in the responese of B16F murine melanoma cells to Radix Scutellariae.

22. OBJECTIVE To establish the microwave - assisted extraction ( MAE ) technology of inhibitor against tyrosinase from Tribulus terrestris L.

23. Emodin hypo-acid, effective component of rhubarb, can affect proliferation of melanocyte and regulate activity of tyrosinase in cells.

24. The inhibition of parathion, phoxim , methomyl, arprocarb, imidacloprid andavermectins to tyrosinase is not obvious.

25. It was indicated that psoralen had an obvious activation on tyrosinase activity and synergistic effect was significant, but the relationship with concentration was nonlinear.

26. This review deals with the active site structure, reactivities and chemical mimics of the binuclear copper enzymes, particularly hemocyanin and tyrosinase.

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27. For example: L-dopa and melanin can be synthesized by oxidation of L-tyrosine catalyzed with tyrosinase. L-dopa is the most effective drug in the treatment of Parkinson' s disease.

28. The inhibitory effects of 4-hydroxycinnamic acid on the activity of monophenol oxidase and diphenol oxidase(containing) in tyrosinase were studied using enzymological kinetic method.

29. The inhibition kinetics and mechanism of the enzyme were studied, and the results show that the inhibition of tyrosinase by benzoic acid is a reversible reaction with remaining enzyme activity.

30. Tyrosinase is the essential enzyme in melanogenesis . The mutation of tyrosinase gene causes albinism.

31. Conclusion Tyrosinase activity can be increasingly induced by acidum vitamin A.

32. AME Extract: Penetrates easily to inhibit tyrosinase activity and control melanin production. Helps reduce freckles, chloasma and age pigment. Leaves skin white, hydrated and elastic.

33. Objective: To study on Inhibitory Effect of Flavonoid Extracts from Hibiscus manihot L on Tyrosinase Activity.