scholarly journals Synthesizing Colloidal Zinc Oxide Nanoparticles for Effective Disinfection; Impact on the Inhibitory Growth of Pseudomonas aeruginosa on the Surface of an Infectious Unit

2018 ◽  
Vol 27 (4) ◽  
pp. 1639-1645
Author(s):  
Mahsa Omrani ◽  
Ebrahim Fataei
2019 ◽  
Vol 19 (2) ◽  
pp. 2043 ◽  
Author(s):  
Moustafa M Saleh ◽  
Refa't A Sadeq ◽  
Hemat K Abdel Latif ◽  
Hisham A Abbas ◽  
Momen Askoura

2018 ◽  
Vol 29 (2) ◽  
pp. 34
Author(s):  
Azhar Jabbar Bohan

This study included the collection of 70 sample of urine from infant aged between (2 days-2 years) divided into 35 sample of healthy children and 35 sample of children suffering from urinary tract infection, Through which get 40 isolated of different types of bacteria. And at different rates ranged between (27 , 12.8 , 7.1 , 5.7 , 4.2 % ) As percentages of the total isolation and (47.5 , 22.5 , 12.5 , 10 , 4.2 %) As percentages of isolation ratios qualitative for E.coli , Proteus mirabilis , Klebsiella Aerogenes, Pseudomonas aeruginosa and Enterococcus Faecalis respectively ,While the number of bacteria in sick children was ( 15, 8, 5, 3, 2 ) isolated for E.coli, Proteus mirabilis, Klebsiella Aerogenes, Pseudomonas aeruginosa and Enterococcus Faecalis respectively with isolation rates (42.85, 22.85, 14.28, 8.57, 5.7 %) Compared with healthy children who were (4) isolated for E.coli and with isolated ratios have (11.42%) and one isolated for each of Proteus mirabilis, Pseudomonas aeruginosa and Enterococcus Faecalis with isolated ratios (2.85 %) for this types respectively, also the preparation of zinc oxide nanoparticles done in Nanotechnology and Advanced Materials Research Center (NAMRC) in university of technology and Prepared of Zinc Oxide NanoParticles were investigated via using Scanning Electron Microscopy (SEM, the VEGA Easy Probe), X-ray powder diffraction (XRD) and antibacterial activity and the results of Zinc Oxide Nano Particles against bacteria explain a bility of it's to inhibition growth of bacteria in different rate of bacteriostatic when used in different concentration.


Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6983
Author(s):  
Abdullah M. Abdo ◽  
Amr Fouda ◽  
Ahmed M. Eid ◽  
Nayer M. Fahmy ◽  
Ahmed M. Elsayed ◽  
...  

The synthesis of nanoparticles by green approaches is gaining unique importance due to its low cost, biocompatibility, high productivity, and purity, and being environmentally friendly. Herein, biomass filtrate of Pseudomonas aeruginosa isolated from mangrove rhizosphere sediment was used for the biosynthesis of zinc oxide nanoparticles (ZnO-NPs). The bacterial isolate was identified based on morphological, physiological, and 16S rRNA. The bio-fabricated ZnO-NPs were characterized using color change, UV-visible spectroscopy, FT-IR, TEM, and XRD analyses. In the current study, spherical and crystalline nature ZnO-NPs were successfully formed at a maximum SPR (surface plasmon resonance) of 380 nm. The bioactivities of fabricated ZnO-NPs including antibacterial, anti-candida, and larvicidal efficacy were investigated. Data analysis showed that these bioactivities were concentration-dependent. The green-synthesized ZnO-NPs exhibited high efficacy against pathogenic Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis), Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), and unicellular fungi (Candida albicans) with inhibition zones of (12.33 ± 0.9 and 29.3 ± 0.3 mm), (19.3 ± 0.3 and 11.7 ± 0.3 mm), and (22.3 ± 0.3 mm), respectively, at 200 ppm. The MIC value was detected as 50 ppm for E. coli, B. subtilis, and C. albicans, and 200 ppm for S. aureus and P. aeruginosa with zones of inhibition ranging between 11.7 ± 0.3–14.6 ± 0.6 mm. Moreover, the biosynthesized ZnO-NPs showed high mortality for Culex pipiens with percentages of 100 ± 0.0% at 200 ppm after 24 h as compared with zinc acetate (44.3 ± 3.3%) at the same concentration and the same time.


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