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Equisetum arvense L, also known as horsetail, is a medicinal plant used in traditional medicine. Especially, it is used in the treatment of bleeding, antiseptic, anti-inflammatory, urethritis, jaundice and hepatitis. In the study, the antimicrobial and antioxidant activities of extracts obtained from different solvents of E. arvense were investigated. Antimicrobial activity of E. arvense extracts was determined using the disc diffusion method. The antimicrobial activity was determined utilizing the pathogenic microorganisms Staphylococcus aureus, Klebsiella pneumoniae, Escherichia coli, Bacillus megaterium, Candida albicans and Candida glabrata. In the results obtained, it was determined that the ethanol extract of E. arvense at 500 µg concentration showed antimicrobial activity at different rates (14.3-28.0). Ethanol extract showed the highest antimicrobial activity against Candida glabrata (28.0 mm) at the same concentration. It was detected that the chloroform extract showed antimicrobial activity (7.3-10.6 mm) against the microorganisms used. The antioxidant activity of the aerial parts of E. arvense at different concentrations of methanol extract was determined according to the 2,2-diphenyl-1-picrylhydrazil radical scavenging capacity method. The highest radical scavenging capacity of the methanol extract was observed at a concentration of 10mg/mL (91.5%). The IC50 value of the methanol extract of E. arvense was calculated as 3.13 mg/mL. [ABSTRACT FROM AUTHOR]

Helichrysum arenarium (L.) Moench subsp. aucheri is a herbaceous perennial herb belonging to the Asteraceae. This plant has biological activities such as antibacterial, antiviral, anti-inflammatory, antifungal, antiproliferative, antioxidant, and antiradical. In this study, antimicrobial and antioxidant activities of methanol and ethanol extracts of aerial parts of H. arenarium subsp. aucheri were investigated. To determine the antimicrobial activity pathogenic microorganisms Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Staphylococcus aureus, Bacillus megaterium, Candida glabrata, Candida albicans and Trichophyton sp. Antioxidant activity was determined with total antioxidant value (TAS), total oxidant value (TOS) and 2.2-diphenyl-1-picrylhydrazil (DPPH) radical scavenging capacity. In the results obtained, it was determined that the methanol extract had an antimicrobial effect (9.3 mm) only against C. albicans. It was found that the ethanol extract showed antimicrobial activity at different rates (8.8-20.4 mm) against S. aureus, B. megaterium, C. glabrata, C. albicans and Trichophyton sp. The TAS value of the methanol extract was 3.00 mmol, and the TAS value of the ethanol extract was 3.15 mmol. The TOS value of the methanol extract of the same species was calculated as 6.81 µmol, and the TOS value of the ethanol extract was calculated as 12.64 µmol. The DPPH radical scavenging effects of extracts of goldengrass was found to increase depend on concentrations. [ABSTRACT FROM AUTHOR]