Effects of Static Magnetic Field on Antioxidant Activities of Black Pepper Extracts
ZHANG Jiao1, WU Song-Hai1, CHEN Wen-Xue2, WANG Fang2
1.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;��
2.College of Food Science and Technology, Hainan University, Haikou 570228, China
Abstract��
The effect of static magnetic field on the antioxidant activities of black pepper extracts was investigated.Various static magnetic fields were employed to affect the extracting process,black pepper extracts preconditioning,and the antioxidant activity detection process,respectively.The antioxidant activities of the extracts were evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging method and reducing power assay.Experimental results demonstrate that the antioxidant activities of black pepper extracts were actually changed under static magnetic field.As the processes affected by static magnetic fields were different,the results were different.When the extracting process and black pepper extracts preconditioning were influenced by static magnetic field,the antioxidant activities of black pepper extracts were inhibited.However,when static magnetic field acted on the antioxidant activity detection process,DPPH radical scavenging activity of the extracts declined,whereas the reducing power significantly increased.
ZHANG Jiao, WU Song-Hai, CHEN Wen-Xue, WANG Fang.Effects of Static Magnetic Field on Antioxidant Activities of Black Pepper Extracts[J]. Chemcial Industry and Engineering, 2012,29(5): 38-42
2012, Vol. 29 
