An Investigation of Antibacterial and Antioxidant Activity of Nettle (Urtica dioica L.), Mint (Mentha piperita), Thyme (Thyme serpyllum) and Chenopodium album L. Plants from Yaylacık Plateau, Giresun, Turkey

Abstract

Ethanol, chloroform and hexane extracts from plants namely Urtica dioica L., Mentha piperita, Thyme serpyllum and Chenopodium album L. were evaluated for their total phenolic and total flavonoid contents, antioxidant and antibacterial efficiencies. The antioxidant activities were screened utilizing DPPH radical scavenging activity, ABTS scavenging activity, CUPRAC activity and total antioxidant capacity. Antibacterial activity of the tested extracts was determined by disc diffusion and broth dilution methods. U. dioica and C. album extracts showed varying activities against the test bacteria. The hexane extracts of T. serpyllum and C. album showed the weakest copper reducing antioxidant capacity (CUPRAC) activity. 2,2-diphenyl-1picrylhydrazyl (DPPH) activity of the solvents are increased in the following order: Ethanol>Chloroform>Hexane. Our results revealed that all of the tested plants might be an alternative to synthetic antioxidant and antibacterial agents.

Investigation of antimicrobial and antioxidant activities of Chenopodium album extracts and their effects on gentamicin nephrotoxicity in rats

“…The study conducted with the CUPRAC method based on the reduction of Cu 2+ to Cu 3+ exhibited the highest antioxidant activity in the ethanol extract of the plant. The ethanol extract exhibited the highest activity in the study by Külcü et al ( 2019 ) using the CUPRAC method. Another study using FRAP indicated that water and methanol extracts of C. album exhibited a good antioxidant activity (Pandey & Gupta, 2014 ).…”

“…The study conducted with the CUPRAC method based on the reduction of Cu 2+ to Cu 3+ exhibited the highest antioxidant activity in the ethanol extract of the plant. The ethanol extract exhibited the highest activity in the study by Külcü et al (2019) the antioxidant activities increased and differed depending on the concentration. This difference was associated with factors such as different solvents and extraction methods used, the environment in which the plant was cultivated, and the time of harvesting.…”

“…In biological systems, the compounds that eliminate or destroy reactive oxygen species not only exist in human metabolism, but also in plants and fruits. Chenopodium album has antimicrobial activity against different pathogenic bacteria such as P. multocida, K. pneumoniae, Bacillus cereus, S. aureus, P. aeruginosa, B. subtilis, E. coli, and Y. enterocolitica (Adedapo et al, 2011;Khomarlou et al, 2017;Külcü et al, 2019;Parkash & Patel, 2014). Korcan examined the antibacterial activity of methanolic extract and found that it was most effective against B. subtilis (13 mm zone of inhibition at 100 g mL −1 ), and that the activity increased with increasing the extract concentration (Korcan et al, 2013).…”

Complementary and Alternative Medicines Used by Individuals With Rheumatological Diseases to Cope With Sleeplessness

“…Herbal teas preferred from the most consumed to the least consumed were stinging nettle tea (30.5%), green tea (20.4%), thyme tea (21.6%), linden tea (18.0%), ginger tea (13.2%), and mint tea (1.8%). It has been reported in studies that stinging nettle can be used as a supportive treatment in rheumatic disorders due to its antioxidant and anti-inflammatory properties 17. Theanine, the main amino acid in green tea leaves, has been reported to have significant antistress effects in animals and humans 18.…”

“…It has been reported in studies that stinging nettle can be used as a supportive treatment in rheumatic disorders due to its antioxidant and anti-inflammatory properties. 17 Theanine, the main amino acid in green tea leaves, has been reported to have significant antistress effects in animals and humans. 18 We believe that green tea with low caffeine content reduces the stress of patients and therefore has a positive effect on sleep.…”