Antimicrobial and Oxidative Activities of Different Levels of Silver-Exchanged Zeolites X and ZSM-5 and Their Ecotoxicity.

Objectives: The antimicrobial, oxidative activities, and ecotoxicity of synthesized silver-loaded zeolites (X and ZSM-5(MFI), Si-to-Al ratios 12 and 25) were studied, linking antimicrobial properties to material structure and released active silver species.

Methods: The materials were characterized by SEM, EDX, TEM, and XRPD. All materials, with a silver content of 1-3%wt for the Ss and about 35%wt for the X-zeolites, were tested against and .

Cytokinins enhance the metabolic activity of in vitro-grown catmint (Nepeta nuda L.).

The phytohormones cytokinins are essential mediators of developmental and environmental signaling, primarily during cell division and endophytic interactions, among other processes. Considering the limited understanding of the regulatory mechanisms that affect the growth and bioactivity of the medicinal plant Nepeta nuda (Lamiaceae), our study aimed to explore how cytokinins influence the plant's metabolic status. Exogenous administration of active cytokinin forms on in vitro N.

Outstanding Antibacterial Activity of -Comparison of the Antimicrobial Effects of Extracts and Fractions from Four Species Growing in Bulgaria with a Focus on Prenylated Phloroglucinols.

Microbial infections are by no means a health problem from a past era due to the increasing antimicrobial resistance of infectious strains. Medicine is in constant need of new drugs and, recently, plant products have had a deserved renaissance and garnered scientific recognition. The aim of this work was to assess the antimicrobial activity of ten active ingredients from four species growing in Bulgaria, as well as to obtain preliminary data on the phytochemical composition of the most promising samples.

Catmint ( L.) Phylogenetics and Metabolic Responses in Variable Growth Conditions.

(catmint; Lamiaceae) is a perennial medicinal plant with a wide geographic distribution in Europe and Asia. This study first characterized the taxonomic position of using DNA barcoding technology. Since medicinal plants are rich in secondary metabolites contributing to their adaptive immune response, we explored the metabolic adjustment operating under variable environments.

Antimicrobial activity and antibiotic susceptibility of and spp. intended for use as starter and probiotic cultures.

Antimicrobial activity and antibiotic susceptibility were tested for 23 and three strains isolated from different ecological niches. Agar-well diffusion method was used to test the antagonistic effect (against , , and ) of acid and neutralized (pH 5.5) lyophilized concentrated supernatants (cell-free supernatant; CFS) and whey (cell-free whey fractions; CFW) from de Man-Rogosa-Sharpe/trypticase-phytone-yeast broth and skim milk.