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Bioautograms of Schkuhria pinnata extracts developed under 2 solvent systems (BEA, CEF, and EMW). The extracts were extracted with the following: H, hexane; C, chloroform; D, dichloromethane; EA, ethyl acetate; A, acetone; E, ethanol; M, methanol and sprayed with Mycobacterium smegmatis. White areas indicate where reduction of INT (p-iodonitrotetrazolium violet) to the colored formazan did not take place due to the presence of compounds that inhibited the growth of M smegmatis.
