Crude extract of an echinoderm tested for antimicrobial activity, showed more activity in lower concentrations. Can any one help me to explain this?

Dried methanolic extract was used for assay, Broth microdilution assay was used, the higher concentration prepared by dissolving 10 mg of crude in 1 ml DMSO. 1:2 dilutions were prepared and made...

09 September 2017 9,902 4 View