The technique of optical-electrochemical microbiological testing as applied to the comparative analysis of the prebiotic and antimicrobial properties of various plant extracts

A biotesting technique is described that provides for periodic (every 2 h) recording of changes in the in-tensity elastic light scattering, pH and electrical conductivity a liquid nutrient medium incubated presence absence viable test microorganisms samples. The results comparative analysis using this antibiotic activity against Staphylococcus aureus different concentra-tions whole subcritical extracts obtained liquefied CO2 from 10 types plant raw mate-rials are presented. Studies have shown among samples studied by us, most active prolonged antimicrobial properties were exhibited roots Chelidonium majus flowers Calendula officinalis at their concentration (CTE) more than 3 vol.%. And ac-tive prebiotic shoots Viscum album leaves Juglans regia CTE = 0.2 In case, biological tested with respect to cases monotonically decreased an increase interaction time mentioned However, exact nature these dependencies can be established only help significant number tests. latter conveniently carried out methodology presented work, which allows much rapid, objective informative, as well less laborious material-intensive, when standard visual mi-crobiological methods, assess effect on dynamics vital vari-ous