Microwave assisted κ-carrageenan capped silver nanocomposites for eradication of bacterial biofilms

Goel, Apoorva; Meher, Mukesh Kumar; Gupta, Payal; Gulati, Khushboo; Pruthi, Vikas; Poluri, Krishna Mohan

doi:10.1016/j.carbpol.2018.11.033

Cited by 56 publications

(22 citation statements)

References 59 publications

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“…Compared with carrageenan, carrageenan-AgNPs showed a narrow peak at 3437 cm −1 , which indicated the O-H functional groups of carrageenan are responsible for the synthesis of AgNPs [32,33]. The peak at 1266 cm −1 shifted to 1262 cm −1 and the peak intensity decreased, indicating the interaction between the sulfate groups with AgNPs, which was consistent with the reported literature [20,23]. These results further confirmed that sulfate group, hydroxyl group in carrageenan are involved in the formation and stability of AgNPs.…”

Section: Characterization Of Carrageenan-agnpssupporting

confidence: 83%

“…Carrageenan is a water-soluble anionic polysaccharide extracted from red algae, which has a large number of hydroxyl and sulfate groups on its molecular chain [22,23]. The negatively charged carrageenan attracts positively charged silver ions by electrostatic attraction, which facilitates the reduction of Ag ions by hydroxyl groups on the molecular chain [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Facile and Green Fabrication of Carrageenan-Silver Nanoparticles for Colorimetric Determination of Cu2+ and S2−

et al. 2020

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In the present work, silver nanoparticles (AgNPs) were prepared by a simple and green method using carrageenan as reducing and capping agent. The as-synthesized carrageenan-AgNPs was demonstrated as an effective duel colorimetric sensing for selective and sensitive recognition of Cu2+ and S2−, which could be used to detect these ions with naked eyes. In addition, the possible sensing mechanism was that Cu2+ ions caused serious aggregation of carrageenan-AgNPs, which led to the color change of carrageenan-AgNPs. AgNPs were etched by S2− forming Ag2S, which played an important role in the determination of S2− ions. Furthermore, it has been successfully applied to the determination of Cu2+ and S2− in tap water and lake water, showing its great potential for the analysis of environmental water samples.

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Section: Characterization Of Carrageenan-agnpssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Facile and Green Fabrication of Carrageenan-Silver Nanoparticles for Colorimetric Determination of Cu2+ and S2−

et al. 2020

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“…In most cases, water-soluble silver nitrate (AgNO 3 ) was adopted as the silver source. For instance, Goel et al [87] synthesized AgNPs to use against Gram-positive and Gram-negative bacterial strains. For this purpose, kappa-Carrageenan (κ-CRG), was used to formulate CRG-Ag nanocomposites through a facile MW synthesis approach.…”

Section: Microwave Synthesis Of Nanoparticlesmentioning

confidence: 99%

Microwave-Driven Synthesis of Iron-Oxide Nanoparticles for Molecular Imaging

2019

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Here, we present a comprehensive review on the use of microwave chemistry for the synthesis of iron-oxide nanoparticles focused on molecular imaging. We provide a brief introduction on molecular imaging, the applications of iron oxide in biomedicine, and traditional methods for the synthesis of these nanoparticles. The review then focuses on the different examples published where the use of microwaves is key for the production of nanoparticles. We study how the different parameters modulate nanoparticle properties, particularly for imaging applications. Finally, we explore principal applications in imaging of microwave-produced iron-oxide nanoparticles.

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“…Incorporation of silver into medical devices is shown to reduce concentrations of various microbes, including S. aureus, and inhibit the formation of biofilms. 3,4 Both ionic and particulate forms of silver are used in skin-contacting medical devices, such as wound dressings 5 or dermal reconstruction matrices, 6 and multiple external-communicating devices, such as Foley catheters containing silver are commercially available.…”

Section: Introductionmentioning

confidence: 99%

Effects of Subcytotoxic Exposure of Silver Nanoparticles on Osteogenic Differentiation of Human Bone Marrow Stem Cells

NguyenAlexander

PatelReema

NobleJade

et al. 2019

Applied In Vitro Toxicology

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Introduction: In vitro toxicology evaluations utilizing human stem cell models represent attractive alternatives to conventional animal models, which are not always predictive of human responses. Silver nanoparticles (AgNP) are a potent antimicrobial for use in orthopedic devices. However, AgNP exposure may alter the behavior of stem cells within the bone marrow. The aim of this study was to determine if differences in cell proliferation, early, and late osteogenic differentiation markers can be detected in osteogenically differentiating human bone marrow mesenchymal stem cells (hBMSC) over a 21-day period at AgNP concentrations that are not considered cytotoxic after 24-hour exposure per ISO 10993-5 cytotoxicity testing guidelines. Materials and Methods: Polyvinylpyrrolidone (PVP)-coated 10 nm AgNP were evaluated for their short-term (24-hour) cytotoxicity to hBMSC using the MTT assay to determine subcytotoxic concentrations for the subsequent long-term study investigating osteogenic differentiation. hBMSC were exposed to 1, 5, or 10 lg/mL AgNP in three different exposure scenarios: single (24-hour), repeated (24-hour at 1, 7, and 14 days), or continuous (21day) exposure. Alkaline phosphatase (early osteogenic differentiation marker), hydroxyapatite deposition (late marker), and cell proliferation were measured at days 1, 7, 14, and 21. Results: AgNP exposure reduced cell proliferation for all treatments. Neither differentiation marker expression was observed at any timepoint in hBMSC exposed to AgNP at 10 lg/mL for any exposure scenario or in cells exposed to 5 lg/mL in the repeated or continuous exposure scenarios. Conclusions: Differences in proliferation and osteogenic marker expression were detected in the different exposure scenarios at AgNP concentrations identified as subcytotoxic in a 24-hour exposure assay.

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Microwave assisted κ-carrageenan capped silver nanocomposites for eradication of bacterial biofilms

Cited by 56 publications

References 59 publications

Facile and Green Fabrication of Carrageenan-Silver Nanoparticles for Colorimetric Determination of Cu2+ and S2−

Facile and Green Fabrication of Carrageenan-Silver Nanoparticles for Colorimetric Determination of Cu2+ and S2−

Microwave-Driven Synthesis of Iron-Oxide Nanoparticles for Molecular Imaging

Effects of Subcytotoxic Exposure of Silver Nanoparticles on Osteogenic Differentiation of Human Bone Marrow Stem Cells

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