Thin coatings based on ZnO@C18-usnic acid nanoparticles prepared by MAPLE inhibit the development of Salmonella enterica early biofilm growth

Stan, Miruna Silvia; Constanda, Sabrina; Grumezescu, Valentina; Andronescu, Ecaterina; Ene, A.-M.; Holban, Alina Maria; Vasile, Bogdan Ștefan; Mogoantă, Laurențiu; Bălşeanu, Tudor-Adrian; Mogoşanu, George Dan; Socol, G.; Dinischiotu, Anca; Lazăr, Veronica; Chifiriuc, Mariana Carmen

doi:10.1016/j.apsusc.2015.12.063

Cited by 17 publications

(10 citation statements)

References 22 publications

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“…Detailed protocols for thin film assembly by MAPLE were addressed in [ 75 ] and are briefly described in the following. The MAPLE experimental procedure consists of laser irradiation of a cryogenic target by a pulsed laser beam.…”

Section: Methodsmentioning

confidence: 99%

Nanostructured Thin Coatings Containing Anthriscus sylvestris Extract with Dual Bioactivity

Neguț

Grumezescu

et al. 2020

Molecules

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Plant extracts are highly valuable pharmaceutical complexes recognized for their biological properties, including antibacterial, antifungal, antiviral, antioxidant, anticancer, and anti-inflammatory properties. However, their use is limited by their low water solubility and physicochemical stability. In order to overcome these limitations, we aimed to develop nanostructured carriers as delivery systems for plant extracts; in particular, we selected the extract of Anthriscus sylvestris (AN) on the basis of its antimicrobial effect and antitumor activity. In this study, AN-extract-functionalized magnetite (Fe3O4@AN) nanoparticles (NPs) were prepared by the co-precipitation method. The purpose of this study was to synthesize and investigate the physicochemical and biological features of composite coatings based on Fe3O4@AN NPs obtained by matrix-assisted pulsed laser evaporation technique. In this respect, laser fluence and drop-casting studies on coatings were performed. The physical and chemical properties of laser-synthesized coatings were investigated by scanning electron microscopy, while Fourier transform infrared spectroscopy comparative analysis was used for determining the chemical structure and functional integrity. Relevant data regarding the presence of magnetic nanoparticles as the only crystalline phase and the size of nanoparticles were obtained by transmission electron microscopy. The in vitro toxicity assessment of the Fe3O4@AN showed significant cytotoxic activity against human adenocarcinoma HT-29 cells after prolonged exposure. Antimicrobial results demonstrated that Fe3O4@AN coatings inhibit microbial colonization and biofilm formation in clinically relevant bacteria species and yeasts. Such coatings are useful, natural, and multifunctional solutions for the development of tailored medical devices and surfaces.

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Section: Methodsmentioning

confidence: 99%

Nanostructured Thin Coatings Containing Anthriscus sylvestris Extract with Dual Bioactivity

Neguț

Grumezescu

et al. 2020

Molecules

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“…)-usnic acid added to polymethylmethacrylate (PMMA)-based bone cement significantly decreased methicillin-resistant Staphylococcus aureus biofilm formation. Stan et al (2016), developed a nanostructured bioactive surface, consisting of zinc oxide, sodium stearate and (? )-usnic acid.…”

Section: Antibacterial Activity and Antibiofilm Propertiesmentioning

confidence: 99%

Enantioselective activity of usnic acid: a comprehensive review and future perspectives

2019

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This review is focused on the comparison of the biological and pharmacological activities of usnic acid enantiomers. Most of the available data refer to (?)-usnic acid, while the left-handed isomer has been less often significantly studied. Special attention was paid to the experiments comparing both (?)-and (-)-usnic acid at the same time, the results of which indicated interesting differences, however no tendency as to which enantiomer was more potent could be observed. Nevertheless, more studies, especially on (-)-usnic acid, are needed to give a final explanation for the similarities and differences between both usnic acid enantiomers. These should be especially directed to steric structure-activity relationship of the enantiomers, tested under the same experimental conditions, which may help to explain the possible mechanisms of their actions.

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“…MG bands at 2918 cm −1 and 2849 cm −1 resulted from, respectively, asymmetric and symmetric stretching vibration of methylene [24,30], indicating successful loading of sodium stearate ions into the garnet. The bands at 1434, 1464, and 1558 cm −1 of sodium stearate were attributed to vibration absorption of methyl and methylene, and asymmetric stretching vibration of the carboxylate group, respectively [30][31][32]. When sodium stearate was grafted onto the garnet, those bands interacted with the band at 1445 cm −1 , leading to a band shift, demonstrating chemical adsorption of sodium stearate in garnet.…”

Section: Physicochemical Properties Of Mgmentioning

confidence: 99%

Surface-Modified Garnet Particles for Reinforcing Epoxy Composites

Jiang

Liu

et al. 2018

Minerals

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The present study investigated the tribological performance of epoxy (EP) matrix composites enhanced with natural garnet. The garnet was surface-modified with sodium stearate for optimal performance. Composites comprising different contents and particle sizes of modified garnet (MG) were prepared with a mixture of EP and MG. The sodium stearate-bonded garnet and EP formed a stable structure. Tribological performance was measured by a ball-on-plate apparatus under permanent dry sliding conditions and a wear track was obtained by an optical profilometer. The wear mechanism was explored by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) images. Wear test results showed that the coefficient of friction for all EP/MG composites decreased compared with that for neat epoxy. The results also indicated that the addition of MG can evidently improve the tribological properties of EP matrix composites.

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Thin coatings based on ZnO@C18-usnic acid nanoparticles prepared by MAPLE inhibit the development of Salmonella enterica early biofilm growth

Cited by 17 publications

References 22 publications

Nanostructured Thin Coatings Containing Anthriscus sylvestris Extract with Dual Bioactivity

Nanostructured Thin Coatings Containing Anthriscus sylvestris Extract with Dual Bioactivity

Enantioselective activity of usnic acid: a comprehensive review and future perspectives

Surface-Modified Garnet Particles for Reinforcing Epoxy Composites

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