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Adhikari L, Sayeed M, Mudireddy RR, Villalon KL, Shekhawat GS, Bleher R, Duncan TV. Surface Heterogeneity at the Polymer-Food Interface Influences Ag Migration from Plastic Packaging Incorporating Ag-Exchanged Zeolites. ACS APPLIED MATERIALS & INTERFACES 2024; 16:48163-48175. [PMID: 39214570 DOI: 10.1021/acsami.4c05581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Silver-enabled polymers, with their antimicrobial properties, could prolong the shelf life and maintain quality in packaged foods. However, there is limited understanding about how the Ag form in the polymer, food chemistry, and other factors affect the transfer (migration) of Ag from the polymer to the food under the intended conditions of use. In this study, we investigated the release of Ag from polymer composites (PCs) incorporating two different Ag-exchanged zeolites (Ag-Y), which have been explored as potential scaffolds for loading high concentrations of Ag within common polymers. We manufactured two Ag-Y films based on low-density polyethylene (LDPE): one incorporating ionic Ag (Ag+) and one incorporating nanoparticulate Ag (AgNPs), each with similar initial Ag concentrations. Then, we assessed the migration of Ag out of these PCs into food simulants under accelerated room temperature storage conditions. In all simulants investigated, the Ag+-Y/LDPE film exhibited a higher migration of Ag compared to the AgNP-Y/LDPE film, suggesting a lower fraction of readily releasable Ag in the latter material. Total Ag migration from AgNP-Y/LDPE over 10 days at 40 °C was 11.10 ± 2.05 ng cm-2 of packaging surface area in water, 7.63 ± 1.59 ng cm-2 in a 9 wt % aqueous sucrose solution, and 21.29 ± 1.98 ng cm-2 in a commercial sweetened carbonated beverage (Squirt). In contrast, Ag migration from Ag+-Y/LDPE was measured at 49.61 ± 3.46, 57.48 ± 9.65, and 91.54 ± 5.58 ng cm-2 in water, sucrose solution, and Squirt drink, respectively. Surface characterization techniques, including atomic force microscopy (AFM), scanning electron microscopy (SEM), and conductivity measurements, revealed the presence of exposed zeolite particles at the surface of the films, suggesting that direct interactions between Ag-exchanged zeolites and food components at the simulant-polymer interface play an important role in determining Ag migration from Ag-Y/LDPE PCs.
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Affiliation(s)
- Laxmi Adhikari
- Center for Food Safety and Nutrition, U.S. Food and Drug Administration, Bedford Park, Illinois 60501, United States
| | - Maryam Sayeed
- Department of Food Science and Nutrition, Illinois Institute of Technology, Bedford Park, Illinois 60501, United States
| | - Rakesh R Mudireddy
- Department of Food Science and Nutrition, Illinois Institute of Technology, Bedford Park, Illinois 60501, United States
| | - Krysten L Villalon
- Department of Materials Science and Engineering and the Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Gajendra S Shekhawat
- Department of Materials Science and Engineering and the Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Reiner Bleher
- Department of Materials Science and Engineering and the Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Timothy V Duncan
- Center for Food Safety and Nutrition, U.S. Food and Drug Administration, Bedford Park, Illinois 60501, United States
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2
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Wolff N, Białas N, Loza K, Heggen M, Schaller T, Niemeyer F, Weidenthaler C, Beuck C, Bayer P, Prymak O, Oliveira CLP, Epple M. Increased Cytotoxicity of Bimetallic Ultrasmall Silver-Platinum Nanoparticles (2 nm) on Cells and Bacteria in Comparison to Silver Nanoparticles of the Same Size. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3702. [PMID: 39124365 PMCID: PMC11313250 DOI: 10.3390/ma17153702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Revised: 07/19/2024] [Accepted: 07/24/2024] [Indexed: 08/12/2024]
Abstract
Ultrasmall nanoparticles (diameter 2 nm) of silver, platinum, and bimetallic nanoparticles (molar ratio of Ag:Pt 0:100; 20:80; 50:50; 70:30; 100:0), stabilized by the thiolated ligand glutathione, were prepared and characterized by transmission electron microscopy, differential centrifugal sedimentation, X-ray photoelectron spectroscopy, small-angle X-ray scattering, X-ray powder diffraction, and NMR spectroscopy in aqueous dispersion. Gold nanoparticles of the same size were prepared as control. The particles were fluorescently labeled by conjugation of the dye AlexaFluor-647 via copper-catalyzed azide-alkyne cycloaddition after converting amine groups of glutathione into azide groups. All nanoparticles were well taken up by HeLa cells. The cytotoxicity was assessed with an MTT test on HeLa cells and minimal inhibitory concentration (MIC) tests on the bacteria Escherichia coli and Staphylococcus xylosus. Notably, bimetallic AgPt nanoparticles had a higher cytotoxicity against cells and bacteria than monometallic silver nanoparticles or a physical mixture of silver and platinum nanoparticles. However, the measured release of silver ions from monometallic and bimetallic silver nanoparticles in water was very low despite the ultrasmall size and the associated high specific surface area. This is probably due to the surface protection by a dense layer of thiolated ligand glutathione. Thus, the enhanced cytotoxicity of bimetallic AgPt nanoparticles is caused by the biological environment in cell culture media, together with a polarization of silver by platinum.
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Affiliation(s)
- Natalie Wolff
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (N.W.); (N.B.); (K.L.); (O.P.)
| | - Nataniel Białas
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (N.W.); (N.B.); (K.L.); (O.P.)
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (N.W.); (N.B.); (K.L.); (O.P.)
| | - Marc Heggen
- Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52428 Jülich, Germany;
| | - Torsten Schaller
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (T.S.); (F.N.)
| | - Felix Niemeyer
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (T.S.); (F.N.)
| | | | - Christine Beuck
- Institute of Biology and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (C.B.); (P.B.)
| | - Peter Bayer
- Institute of Biology and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (C.B.); (P.B.)
| | - Oleg Prymak
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (N.W.); (N.B.); (K.L.); (O.P.)
| | | | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (N.W.); (N.B.); (K.L.); (O.P.)
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3
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Illanes Tormena RP, Medeiros Salviano Santos MK, Oliveira da Silva A, Félix FM, Chaker JA, Freire DO, Rodrigues da Silva IC, Moya SE, Sousa MH. Enhancing the antimicrobial activity of silver nanoparticles against pathogenic bacteria by using Pelargonium sidoides DC extract in microwave assisted green synthesis. RSC Adv 2024; 14:22035-22043. [PMID: 39006771 PMCID: PMC11240086 DOI: 10.1039/d4ra04140b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 06/30/2024] [Indexed: 07/16/2024] Open
Abstract
This study presents an optimized microwave-assisted method for the green synthesis of silver nanoparticles (AgNPs) using a root extract obtained from Pelargonium sidoides DC. The influence of temperature, reagent concentration, and irradiation time was systematically investigated to enhance synthesis yield. Characterization techniques including XRD, UV-vis, FTIR, XPS, and zetametry were employed to confirm the successful formation of nanoparticles with a metallic silver core (∼17 nm) functionalized with organic molecules derived from the plant extract. The cytotoxicity of AgNPs was assessed using a cell viability assay, while the Minimum Inhibitory Concentration (MIC) of nanoformulation against pathogenic bacteria, including Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and the carbapenem-resistant Klebsiella pneumoniae (KPC), was determined using the Broth microdilution method. The nanoformulation synthesized with P. sidoides extract exhibited a dose-dependent response, demonstrating superior antimicrobial efficacy compared to the pure plant extract in most cases. The MIC values ranged from 0.85 to 17.1 μg mL-1, with particularly strong performance against the drug resistant KPC strain. The enhanced antimicrobial effect is attributed to the synergistic action of the metallic silver core and phytochemicals from P. sidoides on the surface of nanoparticles, which also contribute to notable colloidal stability of AgNPs at physiological pH levels.
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Affiliation(s)
| | | | | | | | | | - Daniel Oliveira Freire
- Graduate Program in Health Sciences and Technologies, Faculty of Ceilandia, University of Brasília DF 72220-900 Brasilia Brazil
| | | | - Sergio Enrique Moya
- Soft Matter Nanotechnology Laboratory, CIC biomaGUNE 20009 San Sebastian Guip Spain
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Cybulski O, Quintana C, Siek M, Grzybowski BA. Stirring-Controlled Synthesis of Ultrastable, Fluorescent Silver Nanoclusters. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2400306. [PMID: 38934325 DOI: 10.1002/smll.202400306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 06/09/2024] [Indexed: 06/28/2024]
Abstract
This paper describes how macroscopic stirring of a reaction mixture can be used to produce nanostructures exhibiting properties not readily achievable via other protocols. In particular, it is shown that by simply adjusting the stirring rate, a standard glutathione-based method-to date, used to produce only marginally stable fluorescent silver nanoclusters, Ag NCs-can be boosted to yield nanoclusters retaining fluorescence for unprecedented periods of over 2 years. This enhancement derives not simply from increased homogenization of the reaction mixture but mainly from an appropriately timed delivery of oxygen from above the reaction mixture. In effect, oxygen serves as a reagent that dictates size, structure, stability, and functional properties of the growing nanoobjects.
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Affiliation(s)
- Olgierd Cybulski
- Center for Algorithmic and Robotized Synthesis (CARS), Institute for Basic Science (IBS), Ulsan, 44919, South Korea
| | - Cristóbal Quintana
- Center for Algorithmic and Robotized Synthesis (CARS), Institute for Basic Science (IBS), Ulsan, 44919, South Korea
| | - Marta Siek
- Center for Algorithmic and Robotized Synthesis (CARS), Institute for Basic Science (IBS), Ulsan, 44919, South Korea
| | - Bartosz A Grzybowski
- Center for Algorithmic and Robotized Synthesis (CARS), Institute for Basic Science (IBS), Ulsan, 44919, South Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
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5
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Anyaegbunam NJ, Mba IE, Ige AO, Ogunrinola TE, Emenike OK, Uwazie CK, Ujah PN, Oni AJ, Anyaegbunam ZKG, Olawade DB. Revisiting the smart metallic nanomaterials: advances in nanotechnology-based antimicrobials. World J Microbiol Biotechnol 2024; 40:102. [PMID: 38366174 DOI: 10.1007/s11274-024-03925-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 02/08/2024] [Indexed: 02/18/2024]
Abstract
Despite significant advancements in diagnostics and treatments over the years, the problem of antimicrobial drug resistance remains a pressing issue in public health. The reduced effectiveness of existing antimicrobial drugs has prompted efforts to seek alternative treatments for microbial pathogens or develop new drug candidates. Interestingly, nanomaterials are currently gaining global attention as a possible next-generation antibiotics. Nanotechnology holds significant importance, particularly when addressing infections caused by multi-drug-resistant organisms. Alternatively, these biomaterials can also be combined with antibiotics and other potent biomaterials, providing excellent synergistic effects. Over the past two decades, nanoparticles have gained significant attention among research communities. Despite the complexity of some of their synthesis strategies and chemistry, unrelenting efforts have been recorded in synthesizing potent and highly effective nanomaterials using different approaches. With the ongoing advancements in nanotechnology, integrating it into medical procedures presents novel approaches for improving the standard of patient healthcare. Although the field of nanotechnology offers promises, much remains to be learned to overcome the several inherent issues limiting their full translation to clinics. Here, we comprehensively discussed nanotechnology-based materials, focusing exclusively on metallic nanomaterials and highlighting the advances in their synthesis, chemistry, and mechanisms of action against bacterial pathogens. Importantly, we delve into the current challenges and prospects associated with the technology.
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Affiliation(s)
- Ngozi J Anyaegbunam
- Measurement and Evaluation unit, Science Education Department, University of Nigeria, Nsukka, Nigeria
| | - Ifeanyi Elibe Mba
- Department of Microbiology, Faculty of Biological Sciences, University of Nigeria Nsukka, Nsukka, Nigeria.
| | - Abimbola Olufunke Ige
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, University of Ibadan, Ibadan, Nigeria
| | | | | | | | - Patrick Ndum Ujah
- 7Department of Education Foundations, University of Nigeria Nsukka, Nsukka, Nigeria
| | - Ayodele John Oni
- Department of Industrial chemistry, Federal University of Technology, Akure, Nigeria
| | | | - David B Olawade
- Department of Allied and Public Health, School of Health, Sport and Bioscience, University of East London, London, UK
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6
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Zhou F, Peng J, Tao Y, Yang L, Yang D, Sacher E. The Enhanced Durability of AgCu Nanoparticle Coatings for Antibacterial Nonwoven Air Conditioner Filters. Molecules 2023; 28:5446. [PMID: 37513318 PMCID: PMC10384833 DOI: 10.3390/molecules28145446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/07/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Antibacterial nonwoven fabrics, incorporated with Ag, have been applied as masks and air conditioner filters to prevent the spread of disease from airborne respiratory pathogens. In this work, we present a comparison study of Ag ions: Ag and AgCu nanoparticles (NPs) coated onto nonwoven fabrics intended for use as air conditioner antibacterial filters. We illustrate their color changes and durability running in air conditioners using antibacterial activity testing and X-ray Photoelectron Spectroscopic (XPS) analysis. We found that AgCu NPs showed the best antibacterial efficacy and durability. XPS analysis indicated that the Ag concentration, on both the AgCu and Ag- NP-coated fibers, changed little. On the contrary, the Ag concentration on Ag ion-coated fibers decreased by ~30%, and the coated NPs aggregated over time. The color change in AgCu NP-coated fabric, from yellow to white, is caused by oxide shell formation over the NPs, with nearly 46% oxidized silver. Our results, both from antibacterial evaluation and wind blowing tests, indicate that AgCu NP-coated fibers have higher durability, while Ag ion-coated fibers have little durability in such applications. The enhanced durability of the AgCu NP-coated antibacterial fabrics can be attributed to stronger NP-fiber interactions and greater ion release.
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Affiliation(s)
- Fang Zhou
- NanoTeX Lab, Solmont Technology Wuxi Co., Ltd., 228 Linghu Blvd., Tian'an Tech Park, A1-602, Xinwu District, Wuxi 214135, China
| | - Jiabing Peng
- NanoTeX Lab, Solmont Technology Wuxi Co., Ltd., 228 Linghu Blvd., Tian'an Tech Park, A1-602, Xinwu District, Wuxi 214135, China
| | - Yujie Tao
- NanoTeX Lab, Solmont Technology Wuxi Co., Ltd., 228 Linghu Blvd., Tian'an Tech Park, A1-602, Xinwu District, Wuxi 214135, China
| | - Longlai Yang
- NanoTeX Lab, Solmont Technology Wuxi Co., Ltd., 228 Linghu Blvd., Tian'an Tech Park, A1-602, Xinwu District, Wuxi 214135, China
| | - Dequan Yang
- NanoTeX Lab, Solmont Technology Wuxi Co., Ltd., 228 Linghu Blvd., Tian'an Tech Park, A1-602, Xinwu District, Wuxi 214135, China
- Engineering School, Dali University, 2 Hongsheng Rd., Dali 671003, China
| | - Edward Sacher
- Regroupement Québécois de Matériaux de Pointe, Département de Génie Physique, Polytechnique Montréal, Case Postale 6079, Succursale Centre-Ville, Montréal, QC H3C 3A7, Canada
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7
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Ershov B, Ershov V. Electrochemical Mechanism of Oxidative Dissolution of Silver Nanoparticles in Water: Effect of Size on Electrode Potential and Solubility. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1907. [PMID: 37446423 DOI: 10.3390/nano13131907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/15/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023]
Abstract
For the first time, an electrochemical mechanism of oxidative dissolution of silver nanoparticles in aqueous solutions is suggested and substantiated. The dissolution is caused by the occurrence of two interrelated electrochemical processes: (1) silver oxidation on a microanode and (2) oxygen reduction on a microcathode. According to the suggested model, the standard electrode potential of a nanoparticle decreases with a decrease in its size, which leads to an increase in the electromotive force of the oxidative dissolution of silver. A proportional dependence of the solubility of nanoparticles on their standard potential is revealed. An empirical equation is derived that relates the solubility of AgNPs to their electrode potential and size. In the course of oxidation, silver nanoparticles undergo aggregation with a gradual increase in the potential to the value characteristic of the bulk metal. This leads to the deceleration and practical cessation of the dissolution.
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Affiliation(s)
- Boris Ershov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninsky Pr. 31-4, 119071 Moscow, Russia
| | - Vadim Ershov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninsky Pr. 31-4, 119071 Moscow, Russia
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8
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Wei M, Xiang Q, Wang P, Chen L, Ren M. Ambivalent effects of dissolved organic matter on silver nanoparticles/silver ions transformation: A review. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130533. [PMID: 37055958 DOI: 10.1016/j.jhazmat.2022.130533] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/05/2022] [Accepted: 11/29/2022] [Indexed: 06/19/2023]
Abstract
The numerous applications of silver nanoparticles (AgNPs) lead to their spread in aquatic systems and the release of silver ions (Ag+), which brings potential risks to environment and human health. Owing to the different toxicity, the mutual transformations between AgNPs and Ag+ has been a hot topic of research. Dissolved organic matter (DOM) is ubiquitous on the earth and almost participates in all the reactions in the nature. The previous studies have reported the roles of DOM played in the transformation between AgNPs and Ag+. However, different experiment conditions commonly caused contradictory results, leading to the difficulty to predict the fate of AgNPs in specific reactions. Here we summarized mechanisms of DOM-mediated AgNPs oxidation and Ag+ reduction, and analyzed the effects of environmental parameters. Moreover, the knowledge gaps, challenges, and new opportunities for research in this field are discussed. This review will promote the understanding of the fate and risk assessments of AgNPs in natural water systems.
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Affiliation(s)
- Minxiang Wei
- Institute of International River and Eco-security, Yunnan University, Kunming 650500, PR China; Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, PR China
| | - Qianqian Xiang
- Institute of International River and Eco-security, Yunnan University, Kunming 650500, PR China; College of Agronomy and Life Sciences, Kunming University, Kunming 650214, PR China
| | - Peng Wang
- Institute of International River and Eco-security, Yunnan University, Kunming 650500, PR China
| | - Liqiang Chen
- Institute of International River and Eco-security, Yunnan University, Kunming 650500, PR China.
| | - Meijie Ren
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, PR China.
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9
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Wu J, Sun J, Bosker T, Vijver MG, Peijnenburg WJGM. Toxicokinetics and Particle Number-Based Trophic Transfer of a Metallic Nanoparticle Mixture in a Terrestrial Food Chain. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2792-2803. [PMID: 36747472 DOI: 10.1021/acs.est.2c07660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Herein, we investigated to which extent metallic nanoparticles (MNPs) affect the trophic transfer of other coexisting MNPs from lettuce to terrestrial snails and the associated tissue-specific distribution using toxicokinetic (TK) modeling and single-particle inductively coupled plasma mass spectrometry. During a period of 22 days, snails were fed with lettuce leaves that were root exposed to AgNO3 (0.05 mg/L), AgNPs (0.75 mg/L), TiO2NPs (200 mg/L), and a mixture of AgNPs and TiO2NPs (equivalent doses as for single NPs). The uptake rate constants (ku) were 0.08 and 0.11 kg leaves/kg snail/d for Ag and 1.63 and 1.79 kg leaves/kg snail/d for Ti in snails fed with NPs single- and mixture-exposed lettuce, respectively. The elimination rate constants (ke) of Ag in snails exposed to single AgNPs and mixed AgNPs were comparable to the corresponding ku, while the ke for Ti were lower than the corresponding ku. As a result, single TiO2NP treatments as well as exposure to mixtures containing TiO2NPs induced significant biomagnification from lettuce to snails with kinetic trophic transfer factors (TTFk) of 7.99 and 6.46. The TTFk of Ag in the single AgNPs treatment (1.15 kg leaves/kg snail) was significantly greater than the TTFk in the mixture treatment (0.85 kg leaves/kg snail), while the fraction of Ag remaining in the body of snails after AgNPs exposure (36%) was lower than the Ag fraction remaining after mixture exposure (50%). These results indicated that the presence of TiO2NPs inhibited the trophic transfer of AgNPs from lettuce to snails but enhanced the retention of AgNPs in snails. Biomagnification of AgNPs from lettuce to snails was observed in an AgNPs single treatment using AgNPs number as the dose metric, which was reflected by the particle number-based TTFs of AgNPs in snails (1.67, i.e., higher than 1). The size distribution of AgNPs was shifted across the lettuce-snail food chain. By making use of particle-specific measurements and fitting TK processes, this research provides important implications for potential risks associated with the trophic transfer of MNP mixtures.
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Affiliation(s)
- Juan Wu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, 310014Hangzhou, China
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300 RALeiden, The Netherlands
| | - Jianqiang Sun
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, 310014Hangzhou, China
| | - Thijs Bosker
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300 RALeiden, The Netherlands
- Leiden University College, Leiden University, P.O. Box 13228, 2501 EEThe Hague, The Netherlands
| | - Martina G Vijver
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300 RALeiden, The Netherlands
| | - Willie J G M Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, P.O. Box 9518, 2300 RALeiden, The Netherlands
- National Institute of Public Health and the Environment (RIVM), P.O. Box 1, 3720 BABilthoven, The Netherlands
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10
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Alarcon R, Walter M, Paez M, Azócar MI. Ostwald Ripening and Antibacterial Activity of Silver Nanoparticles Capped by Anti-Inflammatory Ligands. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:428. [PMID: 36770389 PMCID: PMC9920692 DOI: 10.3390/nano13030428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Silver nanoparticles (AgNPs) have been extensively studied during recent decades as antimicrobial agents. However, their stability and antibacterial activity over time have yet to be sufficiently studied. In this work, AgNPs were coated with different stabilizers (naproxen and diclofenac and 5-chlorosalicylic acid) in different concentrations. The suspensions of nanostructures were characterized by transmission electron microscopy, UV-Vis and FT-IR spectroscopic techniques. The antibacterial activity as a function of time was determined through microbiological studies against Staphylococcus aureus. The AgNPs show differences in stabilities when changing the coating agent and its concentration. This fact could be a consequence of the difference in the nature of the interaction between the stabilizer and the surface of the NPs, which were evaluated by FT-IR spectroscopy. In addition, an increase in the size of the nanoparticles was observed after 30 days, which could be related to an Ostwald maturation phenomenon. This result raises new questions about the role that stabilizers play on the surface of NPs, promoting size change in NPs. It is highly probable that the stabilizer functions as a growth controller of the NPs, thus determining an effect on their biological properties. Finally, the antibacterial activity was evaluated over time against the bacterium Staphylococcus aureus. The results showed that the protective or stabilizing agents can play an important role in the antibacterial capacity, the control of the size of the AgNPs and additionally in the stability over time.
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Affiliation(s)
| | | | | | - Manuel Ignacio Azócar
- Departamento de Quimica de los Materiales, Facultad de Quimica y Biologia, & SMAT-C, Universidad de Santiago de Chile, Av. Bernardo O’Higgins 3363, Estacion Central, Santiago 8990000, Chile
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11
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Duncan TV, Bajaj A, Gray PJ. Surface defects and particle size determine transport of CdSe quantum dots out of plastics and into the environment. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129687. [PMID: 36104913 DOI: 10.1016/j.jhazmat.2022.129687] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/22/2022] [Accepted: 07/25/2022] [Indexed: 05/26/2023]
Abstract
Polymers incorporating quantum dots (QDs) have attracted interest as components of next-generation consumer products, but there is uncertainty about how these potentially hazardous materials may impact human health and the environment. We investigated how the transport (migration) of QDs out of polymers and into the environment is linked to their size and surface characteristics. Cadmium selenide (CdSe) QDs with diameters ranging from 2.15 to 4.63 nm were incorporated into low-density polyethylene (LDPE). Photoluminescence was used as an indicator of QD surface defect density. Normalized migration of QDs into 3% acetic acid over 15 days ranged from 13.1 ± 0.6-452.5 ± 31.9 ng per cm2 of polymer surface area. Migrated QD mass was negatively correlated to QD diameter and was also higher when QDs had photoluminescence consistent with larger surface defect densities. The results imply that migration is driven by oxidative degradation of QDs originating at surface defect sites and transport of oxidation products along concentration gradients. A semi-empirical framework was developed to model the migration data. The model supports this mechanism and suggests that QD surface reactivity also drives the relationship between QD size and migration, with specific surface area playing a less important role.
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Affiliation(s)
- Timothy V Duncan
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Bedford Park, IL 60501, USA.
| | - Akhil Bajaj
- Illinois Institute of Technology, Bedford Park, IL 60501, USA
| | - Patrick J Gray
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, Bedford Park, IL 60501, USA
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Mbanga O, Cukrowska E, Gulumian M. Dissolution kinetics of silver nanoparticles: Behaviour in simulated biological fluids and synthetic environmental media. Toxicol Rep 2022; 9:788-796. [DOI: 10.1016/j.toxrep.2022.03.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 02/25/2022] [Accepted: 03/29/2022] [Indexed: 10/18/2022] Open
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Kosa SA, Zaheer Z. Biogenic fabrication of silver nanoparticles, oxidative dissolution and antimicrobial activities. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2021.101414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Giraldo Mejía HF, Herrera Seitz K, Valdés M, Uheida A, Procaccini RA, Pellice SA. Antibacterial performance of hybrid nanocomposite coatings containing clay and silver nanoparticles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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15
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Incorporation of silver nanoparticles into active antimicrobial nanocomposites: Release behavior, analyzing techniques, applications and safety issues. Adv Colloid Interface Sci 2021; 293:102440. [PMID: 34022748 DOI: 10.1016/j.cis.2021.102440] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 05/09/2021] [Accepted: 05/09/2021] [Indexed: 02/08/2023]
Abstract
Employing new strategies to develop novel composite systems has become a popular area of interest among researchers. Raising people's awareness and their attention to the health and safety issues are key parameters to achieve this purpose. One of the recommended strategies is the utilization of nanoparticles within the matrix of composite materials to improve their physical, mechanical, structural and antimicrobial characteristics. Silver nanoparticles (Ag NPs) have attracted much attention for nanocomposite applications mainly due to their antimicrobial characteristics. Herein, the current review will focus on the different methods for preparing antimicrobial nanocomposites loaded with Ag NPs, the release of Ag NPs from these nanostructures in different media, analyzing techniques for the evaluation of Ag release from nanocomposites, potential applications, and safety issues of nanocomposites containing Ag NPs. The applications of Ag NPs-loaded nanocomposites have been extensively established in food, biomedical, textile, environmental and pharmacological areas mainly due to their antibacterial attributes. Several precautions should be addressed before implementation of Ag NPs in nanocomposites due to the health and safety issues.
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Barbasz A, Oćwieja M, Piergies N, Duraczyńska D, Nowak A. Antioxidant-modulated cytotoxicity of silver nanoparticles. J Appl Toxicol 2021; 41:1863-1878. [PMID: 33881181 DOI: 10.1002/jat.4173] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 02/22/2021] [Accepted: 03/22/2021] [Indexed: 11/05/2022]
Abstract
The properties of silver nanoparticles (AgNPs) synthesized using compounds exhibiting biological activity seem to constitute an interesting issue worthy of examination. In these studies, two types of AgNPs were synthesized by a chemical reduction method using well-known antioxidants: gallic acid (GA) and ascorbic acid (AA). Transmission electron microscopy (TEM) and atomic force microscopy (AFM) revealed that the AgNPs were spherical. The average size was equal to 26 ± 6 nm and 20 ± 7 nm in the case of ascorbic acid-silver nanoparticles (AAgNPs) and gallic acid-silver nanoparticles (GAAgNPs), respectively. Surface-enhanced Raman spectroscopy (SERS) confirmed that the AgNPs were not stabilized by pure forms of applied antioxidants. Changes in mitochondrial activity and secretion of inflammatory and apoptosis mediators after the exposure of human promyelocytic (HL-60) and histiocytic lymphoma (U-937) cells to the AgNPs were studied to determine the impact of stabilizing layers on nanoparticle toxicity. The GAAgNPs were found to be more toxic for the cells than the AAgNPs. Their toxicity was manifested by a strong reduction in mitochondrial activity and induction of the secretion of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and caspase-9. The addition of pure antioxidants to the AgNP suspensions was found to influence their toxicity. There was a significant positive effect in the case of the mixture of AA with AAgNPs and GA with GAAgNPs. The results obtained suggest that the presence of stabilizing agents adsorbed on the surface of AgNPs is the main factor in shaping their toxicity. Nevertheless, the toxic effect can be also tuned by the introduction of free antioxidant molecules to the AgNP suspensions.
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Affiliation(s)
- Anna Barbasz
- Institute of Biology, Pedagogical University of Cracow, Krakow, Poland
| | - Magdalena Oćwieja
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
| | - Natalia Piergies
- Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
| | - Dorota Duraczyńska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
| | - Anna Nowak
- Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
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Robinson JR, Isikhuemhen OS, Anike FN. Fungal-Metal Interactions: A Review of Toxicity and Homeostasis. J Fungi (Basel) 2021; 7:225. [PMID: 33803838 PMCID: PMC8003315 DOI: 10.3390/jof7030225] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 12/18/2022] Open
Abstract
Metal nanoparticles used as antifungals have increased the occurrence of fungal-metal interactions. However, there is a lack of knowledge about how these interactions cause genomic and physiological changes, which can produce fungal superbugs. Despite interest in these interactions, there is limited understanding of resistance mechanisms in most fungi studied until now. We highlight the current knowledge of fungal homeostasis of zinc, copper, iron, manganese, and silver to comprehensively examine associated mechanisms of resistance. Such mechanisms have been widely studied in Saccharomyces cerevisiae, but limited reports exist in filamentous fungi, though they are frequently the subject of nanoparticle biosynthesis and targets of antifungal metals. In most cases, microarray analyses uncovered resistance mechanisms as a response to metal exposure. In yeast, metal resistance is mainly due to the down-regulation of metal ion importers, utilization of metallothionein and metallothionein-like structures, and ion sequestration to the vacuole. In contrast, metal resistance in filamentous fungi heavily relies upon cellular ion export. However, there are instances of resistance that utilized vacuole sequestration, ion metallothionein, and chelator binding, deleting a metal ion importer, and ion storage in hyphal cell walls. In general, resistance to zinc, copper, iron, and manganese is extensively reported in yeast and partially known in filamentous fungi; and silver resistance lacks comprehensive understanding in both.
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Affiliation(s)
| | - Omoanghe S. Isikhuemhen
- Department of Natural Resources and Environmental Design, North Carolina Agricultural and Technical State University, 1601 East Market Street, Greensboro, NC 27411, USA; (J.R.R.); (F.N.A.)
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Steinmetz L, Geers C, Balog S, Bonmarin M, Rodriguez-Lorenzo L, Taladriz-Blanco P, Rothen-Rutishauser B, Petri-Fink A. A comparative study of silver nanoparticle dissolution under physiological conditions. NANOSCALE ADVANCES 2020; 2:5760-5768. [PMID: 36133890 PMCID: PMC9417474 DOI: 10.1039/d0na00733a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 10/14/2020] [Indexed: 06/12/2023]
Abstract
Upon dissolution of silver nanoparticles, silver ions are released into the environment, which are known to induce adverse effects. However, since dissolution studies are predominantly performed in water and/or at room temperature, the effects of biological media and physiologically relevant temperature on the dissolution rate are not considered. Here, we investigate silver nanoparticle dissolution trends based on their plasmonic properties under biologically relevant conditions, i.e. in biological media at 37 °C over a period of 24 h. The studied nanoparticles, surface-functionalized with polyvinylpyrrolidone, beta-cyclodextrin/polyvinylpyrrolidone, and starch/polyvinylpyrrolidone, were analysed by UV-Vis spectroscopy, lock-in thermography and depolarized dynamic light scattering to evaluate the influence of these coatings on silver nanoparticle dissolution. Transmission electron microscopy was employed to visualize the reduction of the nanoparticle core diameters. Consequently, the advantages and limitations of these analytical techniques are discussed. To assess the effects of temperature on the degree of dissolution, the results of experiments performed at biological temperature were compared to those obtained at room temperature. Dissolution is often enhanced at elevated temperatures, but has to be determined individually for every specific condition. Furthermore, we evaluated potential nanoparticle aggregation. Our results highlight that additional surface coatings do not necessarily hinder the dissolution or aggregation of silver nanoparticles.
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Affiliation(s)
- Lukas Steinmetz
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Christoph Geers
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Sandor Balog
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Mathias Bonmarin
- School of Engineering, Zurich University of Applied Sciences Technikumstrasse 9 8400 Winterthur Switzerland
| | - Laura Rodriguez-Lorenzo
- International Iberian Nanotechnology Laboratory (INL), Water Quality Group Av. Mestre José Veiga s/n 4715-330 Braga Portugal
| | - Patricia Taladriz-Blanco
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | | | - Alke Petri-Fink
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
- Chemistry Department, University of Fribourg Chemin du Musée 9 1700 Fribourg Switzerland
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Zaheer Z, Albukhari SM. Fabrication of zinc/silver binary nanoparticles, their enhanced microbial and adsorbing properties. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.09.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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Oxidative dissolution of synthetic vivianites as a method for the crystallization of molecular structural motifs. Struct Chem 2020. [DOI: 10.1007/s11224-020-01644-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Doshi M, Bosak A, Neal CJ, Isis N, Kumar U, Jeyaranjan A, Sakthivel TS, Singh S, Willenberg A, Hines RB, Seal S, Willenberg BJ. Exposure to nanoceria impacts larval survival, life history traits and fecundity of Aedes aegypti. PLoS Negl Trop Dis 2020; 14:e0008654. [PMID: 32976503 PMCID: PMC7540862 DOI: 10.1371/journal.pntd.0008654] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 10/07/2020] [Accepted: 07/28/2020] [Indexed: 01/02/2023] Open
Abstract
Effectively controlling vector mosquito populations while avoiding the development of resistance remains a prevalent and increasing obstacle to integrated vector management. Although, metallic nanoparticles have previously shown promise in controlling larval populations via mechanisms which are less likely to spur resistance, the impacts of such particles on life history traits and fecundity of mosquitoes are understudied. Herein, we investigate the chemically well-defined cerium oxide nanoparticles (CNPs) and silver-doped nanoceria (AgCNPs) for larvicidal potential and effects on life history traits and fecundity of Aedes (Ae.) aegypti mosquitoes. When 3rd instar larvae were exposed to nanoceria in absence of larval food, the mortality count disclosed significant activity of AgCNPs over CNPs (57.8±3.68% and 17.2±2.81% lethality, respectively) and a comparable activity to Ag+ controls (62.8±3.60% lethality). The surviving larvae showed altered life history traits (e.g., reduced egg hatch proportion and varied sex ratios), indicating activities of these nanoceria beyond just that of a larvicide. In a separate set of experiments, impacts on oocyte growth and egg generation resulting from nanoceria-laced blood meals were studied using confocal fluorescence microscopy revealing oocytes growth-arrest at 16-24h after feeding with AgCNP-blood meals in some mosquitoes, thereby significantly reducing average egg clutch. AgCNPs caused ~60% mortality in 3rd instar larvae when larval food was absent, while CNPs yielded only ~20% mortality which contrasts with a previous report on green-synthesized nanoceria and highlights the level of detail required to accurately report and interpret such studies. Additionally, AgCNPs are estimated to contain much less silver (0.22 parts per billion, ppb) than the amount of Ag+ needed to achieve comparable larvicidal activity (2.7 parts per million, ppm), potentially making these nanoceria ecofriendly. Finally, this work is the first study to demonstrate the until-now-unappreciated impacts of nanoceria on life history traits and interference with mosquito egg development.
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Affiliation(s)
- Mona Doshi
- University of Central Florida College of Medicine, Department of Internal Medicine, Orlando, Florida, United States of America
| | - Alexander Bosak
- University of Central Florida College of Medicine, Department of Internal Medicine, Orlando, Florida, United States of America
| | - Craig J. Neal
- University of Central Florida College of Engineering, Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, Orlando, Florida, United States of America
| | - Nour Isis
- University of Central Florida College of Medicine, Department of Internal Medicine, Orlando, Florida, United States of America
| | - Udit Kumar
- University of Central Florida College of Engineering, Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, Orlando, Florida, United States of America
| | - Aadithya Jeyaranjan
- University of Central Florida College of Engineering, Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, Orlando, Florida, United States of America
| | - Tamil Selvan Sakthivel
- University of Central Florida College of Engineering, Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, Orlando, Florida, United States of America
| | - Sushant Singh
- University of Central Florida College of Engineering, Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, Orlando, Florida, United States of America
| | - Alicia Willenberg
- University of Central Florida College of Medicine, Department of Internal Medicine, Orlando, Florida, United States of America
| | - Robert B. Hines
- University of Central Florida College of Medicine, Department of Population Health Sciences, Orlando, Florida, United States of America
| | - Sudipta Seal
- University of Central Florida College of Engineering, Department of Materials Science and Engineering and Advanced Materials Processing and Analysis Center, Orlando, Florida, United States of America
- University of Central Florida College of Medicine, NanoScience Technology Center, Orlando, Florida, United States of America
| | - Bradley J. Willenberg
- University of Central Florida College of Medicine, Department of Internal Medicine, Orlando, Florida, United States of America
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Fox CM, Yu T, Breslin CB. Electrochemical formation of silver nanoparticles and their catalytic activity immobilised in a hydrogel matrix. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04624-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Hepato(Geno)Toxicity Assessment of Nanoparticles in a HepG2 Liver Spheroid Model. NANOMATERIALS 2020; 10:nano10030545. [PMID: 32197356 PMCID: PMC7153628 DOI: 10.3390/nano10030545] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/03/2020] [Accepted: 03/11/2020] [Indexed: 12/19/2022]
Abstract
(1) In compliance with the 3Rs policy to reduce, refine and replace animal experiments, the development of advanced in vitro models is needed for nanotoxicity assessment. Cells cultivated in 3D resemble organ structures better than 2D cultures. This study aims to compare cytotoxic and genotoxic responses induced by titanium dioxide (TiO2), silver (Ag) and zinc oxide (ZnO) nanoparticles (NPs) in 2D monolayer and 3D spheroid cultures of HepG2 human liver cells. (2) NPs were characterized by electron microscopy, dynamic light scattering, laser Doppler anemometry, UV-vis spectroscopy and mass spectrometry. Cytotoxicity was investigated by the alamarBlue assay and confocal microscopy in HepG2 monolayer and spheroid cultures after 24 h of NP exposure. DNA damage (strand breaks and oxidized base lesions) was measured by the comet assay. (3) Ag-NPs were aggregated at 24 h, and a substantial part of the ZnO-NPs was dissolved in culture medium. Ag-NPs induced stronger cytotoxicity in 2D cultures (EC50 3.8 µg/cm2) than in 3D cultures (EC50 > 30 µg/cm2), and ZnO-NPs induced cytotoxicity to a similar extent in both models (EC50 10.1-16.2 µg/cm2). Ag- and ZnO-NPs showed a concentration-dependent genotoxic effect, but the effect was not statistically significant. TiO2-NPs showed no toxicity (EC50 > 75 µg/cm2). (4) This study shows that the HepG2 spheroid model is a promising advanced in vitro model for toxicity assessment of NPs.
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Effect of CTAB on the surface resonance plasmon intensity of silver nanoparticles: Stability and oxidative dissolution. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112565] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Hedberg J, Blomberg E, Odnevall Wallinder I. In the Search for Nanospecific Effects of Dissolution of Metallic Nanoparticles at Freshwater-Like Conditions: A Critical Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4030-4044. [PMID: 30908015 DOI: 10.1021/acs.est.8b05012] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Knowledge on relations between particle properties and dissolution/transformation characteristics of metal and metal oxide nanoparticles (NPs) in freshwater is important for risk assessment and product development. This critical review aims to elucidate nanospecific effects on dissolution of metallic NPs in freshwater and similar media. Dissolution rate constants are compiled and analyzed for NPs of silver (Ag), copper (Cu), copper oxide/hydroxide (CuO, Cu(OH)2), zinc oxide (ZnO), manganese (Mn), and aluminum (Al), showing largely varying (orders of magnitude) constants when modeled using first order kinetics. An effect of small primary sizes (<15 nm) was observed, leading to increased dissolution rate constants and solubility in some cases. However, the often extensive particle agglomeration can result in reduced nanospecific effects on dissolution and also an increased uncertainty related to the surface area, a parameter that largely influence the extent of dissolution. Promising ways to model surface areas of NPs in solution using fractal dimensions and size distributions are discussed in addition to nanospecific aspects related to other processes such as corrosion, adsorption of natural organic matter (NOM), presence of capping agents, and existence of surface defects. The importance of the experimental design on the results of dissolution experiments of metal and metal oxide NPs is moreover highlighted, including the influence of ionic metal solubility and choice of particle dispersion methodology.
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Affiliation(s)
- Jonas Hedberg
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry , Division of Surface and Corrosion Science , Stockholm , Sweden
| | - Eva Blomberg
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry , Division of Surface and Corrosion Science , Stockholm , Sweden
- RISE Research Institutes of Sweden , Division Bioscience and Materials , Stockholm , Sweden
| | - Inger Odnevall Wallinder
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry , Division of Surface and Corrosion Science , Stockholm , Sweden
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Capping of silver nanoparticles by anti-inflammatory ligands: Antibacterial activity and superoxide anion generation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 193:100-108. [PMID: 30826583 DOI: 10.1016/j.jphotobiol.2019.02.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 01/19/2019] [Accepted: 02/17/2019] [Indexed: 11/21/2022]
Abstract
Silver nanoparticles (AgNPs) have been widely recognized as antibacterial agents. However, its stability and activity over time have been poorly studied. In this work, the properties and characteristics of differently stabilized AgNPs were evaluated during a span of time. The surface capping agents were diclofenac (d), and ketorolac (k), which currently are used as anti-inflammatory in human medicine. On evaluating the size variation over time, it was observed that the AgNPs-k are the most stable, unlike the non-capped nanoparticles agglomerate and precipitate. UV-Vis spectroscopy analysis showed that the absorbance during time decreases for the three types of nanoparticles, but the decrease is less marked for the two types of anti-inflammatory-capped AgNPs. The rapid loss of the optical prop- erties of bare AgNPs, is mainly due to oxidation, agglomeration, and precipitation of this nanoparticles. The potential cytotoxicity of the AgNPs, evaluated through the formation of the superoxide anion using XXT, showed that both, AgNPs-k and AgNPs-d, generate the radical anion when the samples are irradiated with UV light at 365 nm. This effect appears associated with the capping agents, since the bare nanoparticles did not promote the formation of the superoxide anion. The antibacterial activity of the AgNPs throughout time, against two microorganisms (Escherichia coli and Staphylococcus aureus), was also evaluated. The results showed that capping agents played a decisive role in the antibacterial ability of AgNPs and also in enhancing the antibacterial activity over time.
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Grasmik V, Breisch M, Loza K, Heggen M, Köller M, Sengstock C, Epple M. Synthesis and biological characterization of alloyed silver-platinum nanoparticles: from compact core-shell nanoparticles to hollow nanoalloys. RSC Adv 2018; 8:38582-38590. [PMID: 35559054 PMCID: PMC9090574 DOI: 10.1039/c8ra06461j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/11/2018] [Indexed: 12/17/2022] Open
Abstract
Bimetallic nanoparticles consisting of silver and platinum were prepared by a modified seeded-growth process in water in the full composition range in steps of 10 mol%. The particles had diameters between 15-25 nm as determined by disc centrifugal sedimentation (DCS) and transmission electron microscopy (TEM). Whereas particles with high platinum content were mostly spherical with a solid silver core/platinum shell structure, mostly hollow alloyed nanoparticles were observed with increasing silver content. The internal structure and the elemental distribution within the particles were elucidated by high-resolution transmission electron microscopy (HRTEM) in combination with energy-dispersive X-ray spectroscopy (EDX). The particles were cytotoxic for human mesenchymal stem cells (hMSC) above 50 mol% silver. This was explained by dissolution experiments where silver was only released at and above 50 mol% silver. In contrast, platinum-rich particles (less than 50 mol% silver) did not release any silver ions. This indicates that the presence of platinum inhibits the oxidative dissolution of silver.
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Affiliation(s)
- Viktoria Grasmik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), Universitaetsstr. 5-7 45117 Essen Germany
| | - Marina Breisch
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), Universitaetsstr. 5-7 45117 Essen Germany
| | - Marc Heggen
- Ernst Ruska-Center and Peter Gruenberg Institute, Forschungszentrum Juelich GmbH 52425 Juelich Germany
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), Universitaetsstr. 5-7 45117 Essen Germany
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Rostek A, Breisch M, Pappert K, Loza K, Heggen M, Köller M, Sengstock C, Epple M. Comparative biological effects of spherical noble metal nanoparticles (Rh, Pd, Ag, Pt, Au) with 4-8 nm diameter. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:2763-2774. [PMID: 30498649 PMCID: PMC6244119 DOI: 10.3762/bjnano.9.258] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 10/10/2018] [Indexed: 05/30/2023]
Abstract
For a comparative cytotoxicity study, nanoparticles of the noble metals Rh, Pd, Ag, Pt, and Au (spherical, average diameter 4 to 8 nm) were prepared by reduction in water and colloidally stabilized with poly(N-vinyl pyrrolidone) (PVP). Thus, their shape, size, and surface functionalization were all the same. Size and morphology of the nanoparticles were determined by dynamic light scattering (DLS), analytical disc centrifugation (differential centrifugal sedimentation, DCS), and high-resolution transmission electron microscopy (HRTEM). Cell-biological experiments were performed to determine the effect of particle exposure on the viability of human mesenchymal stem cells (hMSCs). Except for silver, no adverse effect of any of the metal nanoparticles was observed for concentrations up to 50 ppm (50 mg L-1) incubated for 24 h, indicating that noble metal nanoparticles (rhodium, palladium, platinum, gold) that do not release ions are not cytotoxic under these conditions.
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Affiliation(s)
- Alexander Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
| | - Marina Breisch
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum, Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Kevin Pappert
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
| | - Marc Heggen
- Ernst Ruska-Center and Peter Gruenberg Institute, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum, Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum, Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
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Kubo AL, Capjak I, Vrček IV, Bondarenko OM, Kurvet I, Vija H, Ivask A, Kasemets K, Kahru A. Antimicrobial potency of differently coated 10 and 50 nm silver nanoparticles against clinically relevant bacteria Escherichia coli and Staphylococcus aureus. Colloids Surf B Biointerfaces 2018; 170:401-410. [DOI: 10.1016/j.colsurfb.2018.06.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 04/27/2018] [Accepted: 06/15/2018] [Indexed: 10/14/2022]
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Loza K, Epple M. Silver nanoparticles in complex media: an easy procedure to discriminate between metallic silver nanoparticles, reprecipitated silver chloride, and dissolved silver species. RSC Adv 2018; 8:24386-24391. [PMID: 35539215 PMCID: PMC9082037 DOI: 10.1039/c8ra04500c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 07/01/2018] [Indexed: 02/05/2023] Open
Abstract
Silver nanoparticles undergo oxidative dissolution in water upon storage. This occurs in pure water as well as in more complex media, including natural environments, biological tissues, and cell culture media. However, the dissolution leads to the reprecipitation of silver chloride as chloride is present in almost all relevant environments. The discrimination between dissolved silver species (ions and silver complexes) and dispersed (solid) species does not take this into account because all solid species (metallic silver and silver chloride) are isolated together. By applying a chemical separation procedure, we show that it is possible to quantify silver, silver chloride, and dissolved silver species after immersion into a typical cell culture medium (DMEM + 10% FCS). During the dissolution of metallic silver nanoparticles, about half of the dissolved silver is reprecipitated as solid silver chloride, i.e. the mere analysis of the soluble silver species does not reflect the true situation. The separation protocol is suitable for all chloride-containing media in the presence or in the absence of biomolecules.
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Affiliation(s)
- Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
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Pareek V, Gupta R, Panwar J. Do physico-chemical properties of silver nanoparticles decide their interaction with biological media and bactericidal action? A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:739-749. [PMID: 29853145 DOI: 10.1016/j.msec.2018.04.093] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 04/02/2018] [Accepted: 04/30/2018] [Indexed: 02/01/2023]
Abstract
The unprecedented increase in antibiotic resistance in this era has resuscitated the attention of scientific community to exploit silver and its various species as antimicrobial agents. Plenty of studies have been done to measure the antimicrobial potential of silver species (cationic silver, metallic Ag0 or silver nanoparticles, silver oxide particulates etc.) and indicated that membrane damage, oxidative stress, protein dysfunction and DNA damage to be the possible cause of injury to the microbial cell. However, the precise molecular mechanism of their mode of action has remained unclear, which makes an obstacle towards the generation of potential antibacterial agent against various pathogenic and multidrug resistant (MDR) bacteria. In order to endeavor this issue, one should first have the complete understanding about the resistance mechanisms present in bacteria that can be a therapeutic target for the silver-based drug formulations. Apart from this, in-depth understanding of the interactions of various silver species (with the biological media) is a probable deciding factor for the synthesis of silver-based drug formulations because the particular form and physico-chemical properties of silver can ultimately decide their antimicrobial action. In context to above mentioned serious concerns, the present article aims to discuss the mechanisms behind the confrontation of bacteria against various drugs and the effect of physico-chemical properties of silver species on their bactericidal action as well as critically evaluates the available reports on bacterial transcriptomic and proteomic profiles upon the exposure of various silver species. Further, this review state the mechanism of action that needs to be followed for the complete understanding of toxic potential of silver nanoparticles, which will open a possibility to synthesize new silver nanoparticle based antimicrobial systems with desired properties to ensure their safe use, exposure over extended period and fate in human body and environment.
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Affiliation(s)
- Vikram Pareek
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani 333031, India
| | - Rinki Gupta
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani 333031, India
| | - Jitendra Panwar
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani 333031, India.
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Physicochemical properties and cytotoxicity of cysteine-functionalized silver nanoparticles. Colloids Surf B Biointerfaces 2017; 160:429-437. [DOI: 10.1016/j.colsurfb.2017.09.042] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/06/2017] [Accepted: 09/17/2017] [Indexed: 01/20/2023]
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Barbasz A, Oćwieja M, Roman M. Toxicity of silver nanoparticles towards tumoral human cell lines U-937 and HL-60. Colloids Surf B Biointerfaces 2017; 156:397-404. [DOI: 10.1016/j.colsurfb.2017.05.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 04/17/2017] [Accepted: 05/10/2017] [Indexed: 12/11/2022]
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Sadowska M, Adamczyk Z, Oćwieja M, Nattich-Rak M. Monolayers of silver nanoparticles on positively charged polymer microspheres. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.03.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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