The aim of the present work was to recognize the reasons for differences in the photodynamic action of dyes against various bacterial strains. It is expected that a better understanding of this problem may help in design of new photosensitizers. The sensitivity of 6 various bacterial strains to the photodynamic action of 5 photosensitizers was determined. The hydrophobicity of cell surface and ...

Staphylococcus aureus are important factors for infections that acquired of hospital and community. Infections caused by methicillin-resistant Staphylococcus aureus mainly of hospital origin, which in many countries is increasing. For this reason, many researchers have tried to find new compounds as a substitute for these antibiotics. Hypericin is the active substance H.perforatum and licone ma...

In the present study, we investigated the variation in the content of naphthodianthrones hypericin and pseudohypericin, phloroglucinol derivatives hyperforin and adhyperforin, the phenolic acids as chlorogenic acid, neochlorogenic acid, 2,4-dihydroxybenzoic acid, and the flavonols, namely, hyperoside, isoquercitrin, quercitrin, quercetin, avicularin, rutin, (+)-catechin and (-)-epicatechin, and...