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Active constituents of millet bran oil and its inhibitory effect on activity of tyrosinase
  
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KeyWord:millet bran oil  tyrosinase  inhibition rate  antioxidation stability
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YUAN Min  
WANG Changqing  
YU Shujia,etc  
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Abstract:
      The active constituents of vitamin E, oryzanol, squalene and fatty acids in millet bran oil were analyzed. The inhibitory effect of millet bran oil on activity of tyrosinase in potato was studied with pyrocatechol as substrate, vitamin C as positive control.The results showed that millet bran oil had strong inhibitory effect on the activity of tyrosinase，and then had certain inhibition on generation of melanin, millet bran oil displayed the strongest inhibition against tyrosinase with inhibition rate of 92.32% at the mass concentration of 12 mg/mL; and the antioxidation stability of millet bran oil was better with the mass concentration in the range of 1.5-6 mg/mL. Therefore, millet bran oil could be developed and utilized as a kind of natural whitening agent.
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