Characteristics of pigment from the skin of Ligustrum lucidum
The objective is to measure and analysis the stability and antioxidant activity and antibacterial activity of the pigment which is extracted from the skin of Ligustrum lucidum.The experiment results demonstrate that this kind of pigment is stable under acidic conditions 80 ℃ and poor light.The pigment has strong reduction and is able to effectively scavenge hydroxyl radical and superanion radical in vitro.Moreover,its scavenging effect has positive correlation with the concentration of pigment.When the pigment is at the concentration of 0.32 mg/mL,the hydroxyl radical and superanion radical eradication rates are 67.0% and 50.7%.The antibacterial effect of pigment was different on three tested strains,in turn,Bacillus subtilis,Staphyloccus aureus,E.coli.The higher the concentration was,the stronger the antibacterial was.In conclusion,the pigment is relatively stable and the pigment has strong antioxidant activity and antibacterial activity