What does a negative inhibition activity percent mean when testing antioxidants?

timer Asked: Jan 9th, 2015

Question description

I"m testing antioxidant activity of herbal extracts. I calculated absorbance- then used 

Inhib. Acti.%=(A0-A1)/A0x100 to get Inhib. Activity of the extract. A0=ab. of control A1= ab. of extract sample but 4 some im getting neg.,what does this mean? 

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