Antibacterial Activity of Magnesium Oxide Nano-hexagonal Sheets for Wastewater Remediation

2018 ◽  
Vol 38 (s1) ◽  
pp. S260-S266 ◽  
Author(s):  
Ahmed M. Azzam ◽  
Mohamed A. Shenashen ◽  
Bayaumy B. Mostafa ◽  
Wafaa A. Kandeel ◽  
Sherif A. El-Safty
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Wastewater Remediation ◽  
Hexagonal Sheets

Antibacterial activity of magnesium oxide nanoparticles prepared by Calcination method

2019 ◽  
Vol 10 (03) ◽  
Author(s):  
Elaf Ayad Kadhem ◽  
Miaad Hamzah Zghair ◽  
Sarah , Hussam H. Tizkam, Shoeb Alahmad Salih Mahdi ◽  
Hussam H. Tizkam ◽  
Shoeb Alahmad
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Magnesium Oxide Nanoparticles ◽  
Agar Disc

magnesium oxide nanoparticles (MgO NPs) were prepared by simple wet chemical method using different calcination temperatures. The prepared NPs were characterized by Electrostatic Discharge (ESD), Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). It demonstrates sharp intensive peak with the increase of crystallinty and increase of the size with varying morphologies with respect to increase of calcination temperature. Antibacterial studies were done on gram negative bacteria (E.coli) and gram positive bacteria (S.aureus) by agar disc diffusion method. The zones of inhibitions were found larger for gram positive bacteria than gram negative bacteria, this mean, antibacterial MgO NPs activity more active on gram positive bacteria than gram negative bacteria because of the structural differences. It was found that antibacterial activity of MgO NPs was found it has directly proportional with their concentration.

An insight into the Mechanism of Antibacterial activity by Magnesium oxide nanoparticles

2021 ◽  
Author(s):  
Proma Bhattacharya ◽  
Aishee Dey ◽  
Sudarsan Neogi
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Oxide Nanoparticles ◽  
Antibacterial Efficacy ◽  
Magnesium Oxide Nanoparticles ◽  
Insight Into

The exact mechanism behind the antibacterial efficacy of nanoparticles remain unexplored till date. This study is aimed at shedding light on the mechanism adopted by magnesium oxide nanoparticles prepared in...

scholarly journals Bioactive Nanocomposites Composed of Magnesium Oxide Nanoparticles and 58S Bioactive Glass: Synthesis, Characterization, Bioactivity Evaluation and Antibacterial Activity

2020 ◽  
Author(s):  
Seyed Peiman Ghorbanzade Zaferani ◽  
Nima Nabian ◽  
Sayed Mahmood Rabiee
Keyword(s):  
Antibacterial Activity ◽  
Bioactive Glass ◽  
Magnesium Oxide ◽  
Oxide Nanoparticles ◽  
Magnesium Oxide Nanoparticles

Abstract The authors have withdrawn this preprint due to author disagreement.

scholarly journals Synthesis, Characterization and Antibacterial Activity of Novel β-Cyclodextrin Polyurethane Materials

2021 ◽  
Author(s):  
YueXing Chen ◽  
Jun Yan ◽  
Yubin Zhang ◽  
Wenwen Chen ◽  
Zefeng Wang ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Quaternary Ammonium ◽  
Dye Wastewater ◽  
Public Concern ◽  
Wastewater Remediation ◽  
Multifunctional Material ◽  
Remediation Efficiency ◽  
Bactericidal Properties ◽  
Cyclodextrin Cavity ◽  
Pollutants Removal

Abstract The advanced water treatment taken by organic micro-pollution or microbiological pollution water resource has been a hot issue of public concern. In this article, a novel quaternary ammonium salt functionalized β-cyclodextrin polyurethane (QAS-β-CDPU) was successfully constructed for above-mentioned pollutants removal. By adjusting the proportion of the chlorine-containing monomers, we studied the effect of different quaternization degree (0%, 20%, 40%, 60%) on solvent resistance and thermal stability. Staphylococcus aureus are recognized as significant human bacterial pathogens, which were used as model bacteria to investigate the antibacterial activity by contact-killing tests. Methylene blue (MB) served as a toxic organic model to quantify the dye wastewater remediation efficiency. Research shows that the reaction of β-cyclodextrin and diisocyanate can form a cyclodextrin-based carbamate network structure. Since both the cyclodextrin cavity and the carbamate network may remove the dye, the obtained polymer has a double advantage. Besides, the presence of quaternary ammonium groups enables QAS-β-CDPU to possess good bactericidal properties. When the quaternization degree is 60%, sterilization rate of QAS-β-CDPU comes to 97.3%. On basis of this simple, green and economical synthetic route, QAS-β-CDPU has the potential to become an ideal multifunctional material in water purification.

Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates

2020 ◽  
Vol 5 (11) ◽  
pp. 3201-3207 ◽  
Author(s):  
Xiaoyi Li ◽  
Jiao Zhao ◽  
Xiaoyu Hong ◽  
Yan Yang ◽  
Xiaojia Tang ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Surface Defect

Solvothermal Synthesis of Magnesium Oxide-Substituted Hydroxyapatite Nanoparticles as Antibacterial Nanomaterial for Biomedical Applications

2017 ◽  
Vol 381 ◽  
pp. 8-14
Author(s):  
Carlos Paucar Álvarez ◽  
Jeniffer S. Caballero Sarmiento ◽  
Sidónio C. Freitas ◽  
Claudia García
Keyword(s):  
Antibacterial Activity ◽  
Oral Cavity ◽  
Magnesium Oxide ◽  
Biomedical Applications ◽  
Solvothermal Method ◽  
Synergetic Effect ◽  
Potential Effect ◽  
Diffusion Method ◽  
Hydroxyapatite Nanoparticles ◽  
Disk Diffusion Method

In order to generate bactericidal effects in the oral cavity, several alternatives have been studied, including the use of silver nanoparticles but presents problems such as toxicity and low biocompatibility. From human-inspired systems, the antibacterial efficiency of the hydroxyapatite nanoparticles depends strongly on the type of composites and nanoparticles size. Several types of hydroxyapatite nanoparticles and their derivatives have received much attention for their antibacterial potential effect, including magnesium oxide nanoparticles. The purpose of this research was to produce a biocompatible antimicrobial compound of nanoparticles of hydroxyapatite doped with magnesium oxide to generate antibacterial effects in the oral cavity. The solvothermal method was used to produce hydroxyapatite nanoparticles doped with magnesium oxide. Antibacterial activity of as synthesized nanopowders against cariogenicStreptococcus mutanswas tested by the CLSI disk-diffusion method. As result of this research, hydroxyapatite doped with magnesium nanoparticles (nHAMg) were successfully synthetized by the solvothermal method where in structural characterization indicates magnesium substitution and FTIR analysis gives a broader spectrum of the nHAMg when compared to pure nHA and crystallite size of nHA decreased. Furthermore, results of antibacterial assays showed that nHAMg allow to inhibit the grown ofS. mutansby showing a halo of inhibition around the discs. Moreover, this antibacterial activity is enhanced by the addition of silver ion in an amount below to known toxic concentration, showing a synergetic effect that can further potentiate even more these HA nanoparticles. This work demonstrates that solvothermal method is a promising synthesis way for producing antibacterial hydroxyapatites nanoparticles for biomedical applications such as oral tissue regeneration.

Preparation and antibacterial activity of magnesium oxide nanoplates via sol–gel process

2013 ◽  
Vol 8 (9) ◽  
pp. 479-482 ◽  
Author(s):  
Fan Luo ◽  
Junwen Lu ◽  
Wei Wang ◽  
Fantang Tan ◽  
Xueliang Qiao
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Sol Gel ◽  
Sol Gel Process

scholarly journals Nano-Magnesium Oxide: A Novel Bactericide Against Copper-Tolerant Xanthomonas perforans Causing Tomato Bacterial Spot

2019 ◽  
Vol 109 (1) ◽  
pp. 52-62 ◽  
Author(s):  
Y.-Y. Liao ◽  
A. L. Strayer-Scherer ◽  
J. White ◽  
A. Mukherjee ◽  
R. De La Torre-Roche ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Untreated Control ◽  
Structural Changes ◽  
Field Experiments ◽  
Negative Impact ◽  
Metal Oxide Nanoparticles ◽  
Spectrometric Analysis ◽  
Bacterial Spot ◽  
Xanthomonas Perforans

Bacterial spot caused by Xanthomonas perforans causes significant damage on tomato in Florida. Due to the presence of copper (Cu)-tolerant X. perforans strains, Cu bactericides are not effective in disease management. Hence, there is a critical need to find alternatives for Cu. Antibacterial activity of magnesium oxide (Nano-MgO), and other metal oxide nanoparticles, were evaluated against a Cu-tolerant and -sensitive X. perforans strain. In vitro experiments demonstrated high antibacterial activity of Nano-MgO against both strains compared with the commercial Cu. The minimum inhibitory concentration of Nano-MgO is 25 µg/ml and the minimum bactericidal concentration is 100 µg/ml against a Cu-tolerant X. perforans strain after 4 h of exposure. Structural changes in the bacterial membrane following exposure to Nano-MgO treatments compared with the controls were observed using transmission electron microscopy. In two greenhouse experiments with a Cu-tolerant strain, bacterial spot severity was significantly reduced by Nano-MgO at 200 µg/ml compared with Cu-ethylene bis-dithiocarbamate (grower standard), and the untreated control (P = 0.05). In three field experiments, Nano-MgO at 200 µg/ml significantly reduced disease severity with no negative impact on yield compared with the untreated control. Inductively coupled plasma mass spectrometric analysis of the fruit confirmed that Nano-MgO application did not lead to the accumulation of Mg, Cu, Ca, K, Mn, P, and S. This study is the first to demonstrate the potential of Nano-MgO against bacterial spot of tomato.

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