21. Lantibiotics are lanthipeptides that have known antimicrobial activity . 22. Alcoholic extracts from roots of Potentilla reptans showed a moderate antimicrobial activity against common wound pathogens. 23. Fermentation experiments confirmed the antimicrobial activity of " M . pulcherrima " on non-" Saccharomyces " cultures. 24. Testing in vitro has shown better antimicrobial activity with TBZC than both zinc sulfate and zinc oxide. 25. Isolated compounds and a crude extracts from " Astianthus " have failed to show any antimicrobial activity . 26. Because microbes recognize and utilize only certain siderophores, such conjugates are anticipated to have selective antimicrobial activity . 27. Clavulanic acid has negligible intrinsic antimicrobial activity , despite sharing the ?-lactam ring that is characteristic of ?-lactam antibiotics. 28. Laboratory tests show that extracts of the plant have some antimicrobial activity and inhibit the formation of biofilms. 29. In order to develop a useful antibiotic, ADEP continues to be modified for greater antimicrobial activity and stability. 30. Napthoquinonic compounds also exhibit antimicrobial activity .