Latest Articles from BioDiscovery Latest 3 Articles from BioDiscovery https://biodiscovery.pensoft.net/ Fri, 29 Mar 2024 16:00:33 +0200 Pensoft FeedCreator https://biodiscovery.pensoft.net/i/logo.jpg Latest Articles from BioDiscovery https://biodiscovery.pensoft.net/ Antibacterial activity of thin films TiO2 doped with Ag and Cu on Gracilicutes and Firmicutes bacteria https://biodiscovery.pensoft.net/article/21596/ BioDiscovery 20: e21596

DOI: 10.3897/biodiscovery.20.e21596

Authors: Dragomira Stoyanova, Iliana Ivanova, Orlin Angelov, Todorka Vladkova

Abstract: This article aims to explore the antibacterial activity of thin films of TiO2 doped with Ag and Cu using two types of Gram-negative and Gram-positive test bacteria with clinical significance (Gracilicutes and Firmcutes bacteria). The thin films (thickness of about 60 nm) were deposited on glass substrates by radio frequency magnetron co-sputtering (r.f. power of 50 W) of TiO2 target with Ag and Cu pieces on its surface in an Ar atmosphere (0.8 Pa) without heating during the deposition. The total surface area of the Ag was 60 mm2 and that of the Cu was 100 mm2. Bacillus cereus, Staphylococcus epidermidis, Salmonella enterica, Escherichia coli and Pseudomonas sp. were used as test strains. The antibacterial actvity of the films was evaluated by the classical Koch's method and optical density measurements. The bactericidal effect was established at different time points between 30 min and 90 min for Pseudomonas sp. and S. enterica. The Firmicutes bacteria B. cereus and S. epidermidis were killed at the 4th and 8th hour of the treatment, respectively. The effect on E. coli was bacteriostatic until the 10th hour. The results were confirmed by assessment of the bacterial dehydrogenase activity. The studied thin films of TiO2 co-doped with Ag and Cu have a potential for application as antibacterial coatings.

HTML

XML

PDF

]]>
Research Article Fri, 15 Dec 2017 15:27:23 +0200
Antibacterial activity of thin films TiO2 doped with Ag and Cu on Gracilicutes and Firmicutes bacteria https://biodiscovery.pensoft.net/article/15076/ BioDiscovery 20: e15076

DOI: 10.3897/biodiscovery.20.e15076

Authors: Dragomira Stoyanova, Iliana Ivanova, Orlin Angelov, Todorka Vladkova

Abstract:

HTML

XML

PDF

]]>
Conference Abstract Mon, 17 Jul 2017 20:24:58 +0300
Screening an Archetypal Collection of Microorganisms for the Presence of Unexplored Antimicrobial Compounds https://biodiscovery.pensoft.net/article/10763/ BioDiscovery 20: e10763

DOI: 10.3897/biodiscovery.20.e10763

Authors: Lucia Cimarelli, Anna Maria Giuliodori, Anna Brandi, Karolina Adamkiewicz, Roberto Spurio, Attilio Fabbretti

Abstract:

HTML

XML

PDF

]]>
Research Poster Wed, 8 Feb 2017 09:26:49 +0200