Detection of Active Oxygen Generated from Ceramic Powders Having Antibacterial Activity
Jun Sawai,Emiko Kawada,Fumio Kanou,Hideo Igarashi,Atsushi Hashimoto,Takao Kokugan,Masaru Shimizu +6 more
TLDR
In order to elucidate the antibacterial mechanisms of magnesium oxide (MgO), calcium oxide (CaO), and zinc oxide (ZnO), the generation of active oxygen from these ceramic powder slurries was examined by oxygen electrode analysis and chemiluminescence analysis as mentioned in this paper.Abstract:
In order to elucidate the antibacterial mechanisms of magnesium oxide (MgO), calcium oxide (CaO) and zinc oxide (ZnO), the generation of active oxygen from these ceramic powder slurries was examined by oxygen electrode analysis and chemiluminescence analysis. Hydrogen peroxide (H2O2) generated from the ZnO powder slurry was detected using the oxygen electrode. Active oxygen from the MgO and CaO powder slurries was not detected by the oxygen electrode analysis. Chemiluminescence analysis could detect the generation of active oxygen from three kinds of powders. The luminescence response of the CaO powder slurry was markedly strong. The chemiluminescence responses of the CaO and MgO powder slurries are due to the superoxide anion (O2–). The order of the strength of luminescence response was CaO, MgO, and ZnO, which agreed with that of the antibacterial activity of these powders. These results suggested that active oxygen species generated from the ceramic powders were associated with their antibacterial activities.read more
Citations
More filters
Journal ArticleDOI
Review on Zinc Oxide Nanoparticles: Antibacterial Activity and Toxicity Mechanism.
Amna Sirelkhatim,Shahrom Mahmud,Azman Seeni,Noor Haida Mohamad Kaus,Ling Chuo Ann,Siti Khadijah Mohd Bakhori,Habsah Hasan,Dasmawati Mohamad +7 more
TL;DR: This review covered ZnO-NPs antibacterial activity including testing methods, impact of UV illumination,ZnO particle properties (size, concentration, morphology, and defects), particle surface modification, and minimum inhibitory concentration.
Journal ArticleDOI
Investigation into the antibacterial behaviour of suspensions of ZnO nanoparticles (ZnO nanofluids)
TL;DR: In this article, the antibacterial behavior of suspensions of zinc oxide nanoparticles (ZnO nanofluids) against E. coli has been investigated and the effects of particle size, concentration and the use of dispersants on the behavior of ZnO nanoparticles were examined.
Journal ArticleDOI
Mechanism of Photogenerated Reactive Oxygen Species and Correlation with the Antibacterial Properties of Engineered Metal-Oxide Nanoparticles
TL;DR: A linear correlation was found between the average concentration of total ROS and the bacterial survival rates under UV irradiation, and this correlation quantitatively linked ROS production capability of NPs to their antibacterial activity as well as shed light on the applications of metal-oxide NPs as potential antibacterial agents.
Journal ArticleDOI
Antibacterial Activity and Mechanism of Action of Zinc Oxide Nanoparticles against Campylobacter jejuni
TL;DR: The results suggest that the antibacterial mechanism of ZnO nanoparticles is most likely due to disruption of the cell membrane and oxidative stress in Campylobacter.
Journal ArticleDOI
Quantitative evaluation of antibacterial activities of metallic oxide powders (ZnO, MgO and CaO) by conductimetric assay
TL;DR: CaO was the most effective, followed by MgO and ZnO, against E. coli, and was suggested to have a strong affinity to the cells of S. aureus.
References
More filters
Journal ArticleDOI
Biological defense mechanisms. The production by leukocytes of superoxide, a potential bactericidal agent.
TL;DR: O(2) (-) is made by leukocytes under circumstances which suggest that it may be involved in bacterial killing, and is identified as the agent responsible for the leukocyte-mediated reduction of cytochrome c.
Journal ArticleDOI
Oxidative stress responses in Escherichia coli and Salmonella typhimurium.
TL;DR: The products of Oxy-R- and SoxRS-regulated genes, such as catalases and superoxide dismutases, are involved in the prevention of oxidative damage, whereas others play a role in the repair of oxidativeDamage.
Journal ArticleDOI
Free radical theory of aging.
TL;DR: The free radical theory of aging postulates that aging changes are caused by free radical reactions, and data indicate that average life expectancy at birth may be increased by 5 or more years, by nutritious low caloric diets supplemented with one or more free radical reaction inhibitors.
Journal ArticleDOI
Phagocytic activation of a luminol-dependent chemiluminescence in rabbit alveolar and peritoneal macrophages.
Robert C. Allen,L.D. Loose +1 more
TL;DR: The chemiluminescent response obtained was of high intensity, and could be easily monitored using the standard in-coincidence scintillation spectrophotometry equipment employed in routine isotope counting.
Journal ArticleDOI
Evaluation of Growth Inhibitory Effect of Ceramics Powder Slurry on Bacteria by Conductance Method
TL;DR: The growth inhibitory effect of 26 ceramic powder slurries on bacteria was evaluated by measurement of the conductance change of the growth medium caused by bacterial metabolism (conductance method).