Antioxidant and Tyrosinase Inhibitory Activities of Seed Oils from Torreya grandis Fort. ex Lindl.

Table 3

The test results of tyrosinase inhibition activity and kinetic parameters.

Name	(OD475/min)	IC50 (g/ml)	(mM)	(g/ml)
Diphenolase
TGSO	0.167	237.42±2.23	1.92	637.79±6.31
XYSO	0.147	227.01±2.68	1.61	587.6±3.87
ZMSO	0.1	277.98±1.38	0.89	297.39±5.61
TGMSO	0.063	244.52±4.15	0.87	317.57±3.48
CGSO	0.083	326.63±2.55	0.77	280.74±4.26
Kojic acid	-	32.65±0.42	-	-
Monophenolase
TGSO	0.066	849.42±4.37	0.72	481.87±6.84
XYSO	0.05	817.53±3.79	0.44	473.7±4.32
ZMSO	0.04	879.65±5.13	0.37	396.7±5.11
TGMSO	0.036	936.44±6.38	0.14	563.17±3.27
CGSO	0.027	968.28±6.52	0.22	443.43±4.44
Ascorbic acid	-	35.97±0.13	-	-

Summary of the inhibition kinetics of the antioxidants derived from the five different varieties of T. grandis. Notes. Data represent the mean values ± SD (n=3).