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
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TLDR
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.Abstract:
Antibacterial activity of zinc oxide nanoparticles (ZnO-NPs) has received significant interest worldwide particularly by the implementation of nanotechnology to synthesize particles in the nanometer region. Many microorganisms exist in the range from hundreds of nanometers to tens of micrometers. ZnO-NPs exhibit attractive antibacterial properties due to increased specific surface area as the reduced particle size leading to enhanced particle surface reactivity. ZnO is a bio-safe material that possesses photo-oxidizing and photocatalysis impacts on chemical and biological species. 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. Particular emphasize was given to bactericidal and bacteriostatic mechanisms with focus on generation of reactive oxygen species (ROS) including hydrogen peroxide (H2O2), OH− (hydroxyl radicals), and O2 −2 (peroxide). ROS has been a major factor for several mechanisms including cell wall damage due to ZnO-localized interaction, enhanced membrane permeability, internalization of NPs due to loss of proton motive force and uptake of toxic dissolved zinc ions. These have led to mitochondria weakness, intracellular outflow, and release in gene expression of oxidative stress which caused eventual cell growth inhibition and cell death. In some cases, enhanced antibacterial activity can be attributed to surface defects on ZnO abrasive surface texture. One functional application of the ZnO antibacterial bioactivity was discussed in food packaging industry where ZnO-NPs are used as an antibacterial agent toward foodborne diseases. Proper incorporation of ZnO-NPs into packaging materials can cause interaction with foodborne pathogens, thereby releasing NPs onto food surface where they come in contact with bad bacteria and cause the bacterial death and/or inhibition.read more
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Structural study, photoluminescence and photocatalytic properties of La2O3 ⋅ Fe3O4 ⋅ ZnO,AgO ⋅ NiO ⋅ ZnO and La2O3 ⋅ AgO ⋅ ZnO nanocomposites
Abdus Subhan,Abul Monsur M. Fahim,Pallab Chandra Saha,Mohammed M. Rahman,Kulsuma Begum,Abul Kalam Azad +5 more
TL;DR: In this article, a co-precipitation method was used to synthesize nanocomposites La2O3⋅Fe3O4ZnO,AgO⋆NiO⊆ZnOs and La 2O3
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Highly active ZnO modified g-C3N4 Nanocomposite for dye degradation under UV and Visible Light with enhanced stability and antimicrobial activity
TL;DR: In this article, a photo-catalytically active nanocomposite was used for the degradation of textile dye Direct Blue 199 under UV and visible irradiation, and the results showed that photocatalytic activity of the ZnO/g-C 3 N 4 nanocompositionite was much higher than that of pure g-C3 N 4 via photodegradation of DirectBlue 199 under irradiation.
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Antibacterial activity of zinc oxide nanoparticles synthesized by solochemical process
Roberta Cristina de Souza,Leticia Ungaretti Haberbeck,Humberto Gracher Riella,Deise Helena Baggio Ribeiro,Bruno Augusto Mattar Carciofi +4 more
TL;DR: In this article, the antibacterial activity of ZnO-NPs obtained by a solochemical process against important human foodborne pathogens: Staphylococcus aureus, Salmonella Typhimurium, Bacillus cereus and Pseudomonas aeruginosa.
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Exposure to air pollutants and the gut microbiota: a potential link between exposure, obesity, and type 2 diabetes
TL;DR: A review of recent findings regarding the impact of inhaled and ingested air pollutants on the gut microbiota suggests that such exposure-induced alterations to the gut microbiome may contribute to increased risk for obesity and type 2 diabetes through inflammatory pathways.
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Deposition of Zinc Oxide on Different Polymer Textiles and Their Antibacterial Properties.
Marta Fiedot-Toboła,Magdalena Ciesielska,Irena Maliszewska,Olga Rac-Rumijowska,Patrycja Suchorska-Woźniak,Helena Teterycz,Marek Bryjak +6 more
TL;DR: A surface modification of polyamide 6 (PA), polyethylene terephthalate (PET) and polypropylene (PP) textiles was performed using zinc oxide to obtain antibacterial layer and it was indicated that the rougher and more hydrophilic is the material, the more ZnO were deposited.
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