Decontamination of ubiquitous harmful microbial lineages in water using an innovative Zn2Ti0.8Fe0.2O4 nanostructure: dielectric and terahertz properties

Nahrawy, Amany M. El; Bakr, Abu; Hemdan, Bahaa A.; Wassel, Ahmed R.

doi:10.1016/j.heliyon.2019.e02501

Cited by 23 publications

(11 citation statements)

References 53 publications

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“…It is well‐known that chlorine can prevent the growth of biofilm in water systems. The microorganisms, which are exposed to chlorine, are formed during the stages of water treatment (El Nahrawy, Hammad, Bakr, Hemdan, & Wassel, 2019; Hammad et al., 2020). A few of the previous studies relating to the interaction between pipe materials at low chlorine rates and microbial diversity (<1.0 mg/L chlorine) received adequate details (Hemdan & Elliethy, 2016).…”

Section: Resultsmentioning

confidence: 99%

The destruction of Escherichia coli adhered to pipe surfaces in a model drinking water distribution system via various antibiofilm agents

Hemdan

El‐Liethy

El‐Taweel

2020

Water Environment Research

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The aim of the study is to estimate the effectiveness of three antibiofilm agents against Escherichia coli biofilm that formed in six different types of pipelines. A laboratoryscale water system was built for this work to allow for the creation of biofilm in the pipelines studied. The level of the growth rate of E. coli biofilm cells was monitored over 90 days on those tested pipe materials. The results of bacterial cell densities displayed that the highest biofilm growth was observed in the biofilm formed on the iron (Fe) pipe. In contrast, the biofilm formation rate was significantly lower on copper (Cu) pipe compared to other materials. Three antibiofilm agents, including chlorine, silver ions (Ag +), and silver nanoparticles (AgNPs), were employed to eradicate the biofilm cells. E. coli counts indicated that AgNPs are more efficient in destructing any formed biofilm cells on all tested materials. At the same time, the chlorine was only useful in the case of biofilm developed on plastic and Cu. However, the antibiofilm efficiency of Ag + performs similarly to chlorine against E. coli biofilm cells. Ultimately, AgNPs are considred the most powerful antibiofilm agent among the other agents toward the biofilm cells in their maturation stage, which offers an encouraging way for the long-term functioning of water systems. © 2020 Water Environment Federation • Practitioner points • The growth rate of E. coli biofilm cells was investigated on different materials. • The count of biofilm cells developed on iron pipes was higher than other materials. • The E. coli biofilm on iron pipe could resist chlorine and AgNPs to a large extent. • The developed biofilm on copper pipe was more sensitive to chlorine, Ag +. and AgNPs. • The biofilm cells could be easily eradicated from plastic-based materials with all tested disinfectants.

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Section: Resultsmentioning

confidence: 99%

The destruction of Escherichia coli adhered to pipe surfaces in a model drinking water distribution system via various antibiofilm agents

Hemdan

El‐Liethy

El‐Taweel

2020

Water Environment Research

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“…From a stock solution of each tested compound (50 mg/mL), three different concentrations (2.5, 5, and 10 mg/mL) of each compound were transferred to a tube containing 20 µL of fresh pathogen microbial culture to estimate the lethal concentrations. After three different time intervals (5,10,15, and 20 min), the densities of surviving cells were counted using the plate count viability assay [75].…”

Section: Minimum Inhibitory Concentration (Mic)mentioning

confidence: 99%

Design, Synthesis, and Antimicrobial Activities of 1,2,3-Triazole Glycoside Clickamers

et al. 2020

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Bacterial resistance remains a significant threat and a leading cause of death worldwide, despite massive attempts to control infections. In an effort to develop biologically active antibacterial and antifungal agents, six novel aryl-substituted-1,2,3-triazoles linked to carbohydrate units were synthesized through the Cu(I)-catalyzed azide-alkyne cycloaddition CuAAC of substituted-arylazides with a selection of alkyne-functionalized sugars. The chemical structures of the new derivatives were verified using different spectroscopic techniques. The novel clicked 1,2,3-triazoles were evaluated for in vitro antibacterial activity against Gram-positive Staphylococcus aureus and Gram-negative Pseudomonas aeruginosa, and the obtained results were compared with the activity of the reference antibiotic “Ampicillin”. Likewise, in vitro antifungal activity of the new 1,2,3-triazoles was investigated against Candida albicans and Aspergillus niger using “Nystatin” as a reference drug. The results of the biological evaluation pointed out that Staphylococcus aureus was more susceptible to all of the tested compounds than other examined microbes. In addition, some tested compounds exhibited promising antifungal activity.

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where k 1 (1 min −1 ) is the rate of inactivation; q e (mg·g −1 ), and q t (mg·g −1 ) are the amounts adsorbed at equilibrium and at time t (min), respectively. A straight line of ln ( q e − q t ) versus t suggested that this kinetic model was applied to the data [ 38 ].…”

Section: Methodsmentioning

confidence: 99%

Antibacterial Activities and Molecular Docking of Novel Sulfone Biscompound Containing Bioactive 1,2,3-Triazole Moiety

et al. 2021

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In this study, a new synthetic 1,2,3-triazole-containing disulfone compound was derived from dapsone. Its chemical structure was confirmed using microchemical and analytical data, and it was tested for its in vitro antibacterial potential. Six different pathogenic bacteria were selected. MICs values and ATP levels were determined. Further, toxicity performance was measured using MicroTox Analyzer. In addition, a molecular docking study was performed against two vital enzymes: DNA gyrase and Dihydropteroate synthase. The results of antibacterial abilities showed that the studied synthetic compound had a strong bactericidal effect against all tested bacterial strains, as Gram-negative species were more susceptible to the compound than Gram-positive species. Toxicity results showed that the compound is biocompatible and safe without toxic impact. The molecular docking of the compound showed interactions within the pocket of two enzymes, which are able to stabilize the compound and reveal its antimicrobial activity. Hence, from these results, this study recommends that the established compound could be an outstanding candidate for fighting a broad spectrum of pathogenic bacterial strains, and it might therefore be used for biomedical and pharmaceutical applications.

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Decontamination of ubiquitous harmful microbial lineages in water using an innovative Zn2Ti0.8Fe0.2O4 nanostructure: dielectric and terahertz properties

Cited by 23 publications

References 53 publications

The destruction of Escherichia coli adhered to pipe surfaces in a model drinking water distribution system via various antibiofilm agents

The destruction of Escherichia coli adhered to pipe surfaces in a model drinking water distribution system via various antibiofilm agents

Design, Synthesis, and Antimicrobial Activities of 1,2,3-Triazole Glycoside Clickamers

Antibacterial Activities and Molecular Docking of Novel Sulfone Biscompound Containing Bioactive 1,2,3-Triazole Moiety

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