The inhibitory effects of silver nanoparticles, silver ions, and silver chloride colloids on microbial growth

Choi, Okkyoung; Deng, Kathy Kanjun; Kim, Nam‐Jung; Ross, Louis; Surampalli, Rao Y.; Hu, Zhiqiang

doi:10.1016/j.watres.2008.02.021

Cited by 1,213 publications

(756 citation statements)

References 39 publications

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“…Bacteria have been shown to be very sensitive to exposure to a variety of ENMs, including carbon nanotubes, ZnO, CdSe, and TiO 2 [107,108]. Silver nanoparticles have been studied extensively in the laboratory and have significant inhibitory effects on bacterial growth and activity [107,109,110], although Ag ions released by the NPs could have contributed to this toxicity [111,112]. Alterations to microbial communities could have significant effects on biogeochemical cycling and other critical ecosystem services [113].…”

Section: Bacterial Tests For Enmsmentioning

confidence: 99%

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Handy

Cornelis

Fernandes

et al. 2011

Enviro Toxic and Chemistry

297

236

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Abstract-Ecotoxicology research is using many methods for engineered nanomaterials (ENMs), but the collective experience from researchers has not been documented. This paper reports the practical issues for working with ENMs and suggests nano-specific modifications to protocols. The review considers generic practical issues, as well as specific issues for aquatic tests, marine grazers, soil organisms, and bioaccumulation studies. Current procedures for cleaning glassware are adequate, but electrodes are problematic. The maintenance of exposure concentration is challenging, but can be achieved with some ENMs. The need to characterize the media during experiments is identified, but rapid analytical methods are not available to do this. The use of sonication and natural/synthetic dispersants are discussed. Nano-specific biological endpoints may be developed for a tiered monitoring scheme to diagnose ENM exposure or effect. A case study of the algal growth test highlights many small deviations in current regulatory test protocols that are allowed (shaking, lighting, mixing methods), but these should be standardized for ENMs. Invertebrate (Daphnia) tests should account for mechanical toxicity of ENMs. Fish tests should consider semistatic exposure to minimize wastewater and animal husbandry. The inclusion of a benthic test is recommended for the base set of ecotoxicity tests with ENMs. The sensitivity of soil tests needs to be increased for ENMs and shortened for logistics reasons; improvements include using Caenorhabditis elegans, aquatic media, and metabolism endpoints in the plant growth tests. The existing bioaccumulation tests are conceptually flawed and require considerable modification, or a new test, to work for ENMs. Overall, most methodologies need some amendments, and recommendations are made to assist researchers. Environ. Toxicol. Chem. 2012;31:15-31. # 2011 SETAC

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Section: Bacterial Tests For Enmsmentioning

confidence: 99%

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Handy

Cornelis

Fernandes

et al. 2011

Enviro Toxic and Chemistry

297

236

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“…The inorganic additive used in the present study was a nanoform of silver (AgNano). One of the mechanisms of silver ion release from polymeric matrix occurs through contact of metallic silver with dissolved oxygen in moisture 15,16 . Once released, AgNano will act on the microbial cells through several modes of action 17 , such as: (a) nanoparticles can bind to proteins of vital enzymes presents in the mycelial 18 and bacterial 19 cell wall, (b) also can damage the cellular structures and biomolecules 20 , (c) cause toxicity by the generation of reactive oxygen species 21 , besides (d) affecting in the molecular and cellular routes of bacteria.…”

Section: Introductionmentioning

confidence: 99%

“…Once released, AgNano will act on the microbial cells through several modes of action 17 , such as: (a) nanoparticles can bind to proteins of vital enzymes presents in the mycelial 18 and bacterial 19 cell wall, (b) also can damage the cellular structures and biomolecules 20 , (c) cause toxicity by the generation of reactive oxygen species 21 , besides (d) affecting in the molecular and cellular routes of bacteria. Recently, silver nanoparticles have been pointed out as the most innovative and efficient antibacterial form 16 , since they provide better dispersion in the polymeric matrix 22 . However, it is reported that in incorporated polymers, ZnPT leaches from the bulk toward to polymer surface in a faster way than silver.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Performance of Thermoplastic Elastomers Containing Zinc Pyrithione and Silver Nanoparticles

et al. 2017

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The purpose of the present study was to evaluate the antimicrobial potential of styrene-ethylene/ butylene-styrene based thermoplastic elastomers (TPE) incorporated with zinc pyrithione (ZnPT) and silver nanoparticles (AgNano). Japan Industrial Standard was applied to evaluate the antimicrobial potential of incorporated TPE compounds against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Antifungal action was evaluated against Aspergillus niger, Candida albicans and Cladosporium cladosporioides. Samples prepared with ZnPT eliminated 99.9% of the E. coli and 99.7 % of the S. aureus population, and presented an inhibition zone in the fungal assay. Samples prepared with AgNano eliminated 99.7% of the E. coli and 95.5 % of the S. aureus population. There was no inhibition zone in samples containing AgNano; however, these samples did not present fungal growth on their surfaces. TPE samples containing ZnPT showed biocidal activity against the microorganisms tested and can be used to develop antimicrobial products.

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“…Due to their physiochemical properties AgNPs can act as catalyst and produce reactive oxygen species, ROS, (Choi et al, 2008). The formation of free radicals on the surface of AgNPs has been observed (Kim et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Leaf Extract of Rosmarinus officinalis and Its Effect on Tomato and Wheat Plants

Farghaly¹,

Nafady²

2015

JAS

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Biological green synthesis of silver nanoparticles (AgNPs) from silver salts is a growing advanced approach to avoid the requirement of costly instruments and involvement of hazardous chemicals as well. However, increasing use of AgNPs raises potential toxicity level in the environment. In this investigation, leaf extract of rosemary (Rosmarinus officinalis) used as a reducing and stabilizing agent for biosynthesis of AgNPs. The biosynthesized AgNPs were authorized by UV-vis spectrophotometer and X-ray diffraction (XRD) analysis. The shape and size of the biosynthesized AgNPs were studied using high resolution transmission electron microscope (TEM). The toxicity of the biosynthesized silver nanoparticles on wheat and tomato plants was studied by soaking wheat grains and tomato seeds in 100 mg/L AgNPs and follow its effect on seedling growth of wheat (at 10 days) and on vegetative growth of tomato and wheat plants (at 35 days). Some physiological parameters as germination percentage of wheat seedling, length of seedling, dry weight, pigment fractions (chl.a, chl.b and caroteinoids), soluble proteins, lipid peroxidation (MDA) and antioxidant enzymes (catalase and peroxidase) of two plants were measured. AgNPs has a non-significant inhibitory effect on germination percentage of wheat, dry weight and pigment fractions. The biosynthesized AgNPs has a noticeable stress effect on tomato plant as reduced chlorophyll a and dry weight. Generally, AgNPs stimulate MDA accumulation in tomato and wheat plants. There was a noticeable different effect of AgNPs on soluble proteins and antioxidant enzymes as catalase and peroxidase among tomato and wheat plants.

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The inhibitory effects of silver nanoparticles, silver ions, and silver chloride colloids on microbial growth

Cited by 1,213 publications

References 39 publications

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Antimicrobial Performance of Thermoplastic Elastomers Containing Zinc Pyrithione and Silver Nanoparticles

Green Synthesis of Silver Nanoparticles Using Leaf Extract of Rosmarinus officinalis and Its Effect on Tomato and Wheat Plants

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