Silver-incorporated hydroxyapatite–albumin microspheres with bactericidal effects

Mishra, Saswati; Rautray, Tapash R.

doi:10.1007/s43207-020-00018-z

Cited by 20 publications

(6 citation statements)

References 47 publications

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“…4. Antibacterial Ag blocked the channels of bacteria cells and the positive charge of Ag neutralize the negatively charged bacteria membrane changing the lipid layer structure, increasing the permeability of cell membranes and ruptured the bacterial membrane resulting the bacteria cell death [13, 29]. The bacterial cell viability of S. aureus was performed after 10 h, 20 h, and 30 h of culture.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of silver doped nano hydroxyapatite-carrageenan hydrogels for articular cartilage applications

Swain

Kwon²,

Rautray

2021

Preprint

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It can be found from the results that nano hydroxyapatite- silver -3.0 wt% carageenan (nHA-Ag-CG3.0) improved the mechanical properties of the as-formed hydrogel scaffold after incorporation of higher CG concentration. The Young’s modulus of hydroxyapatite- silver - 1.5wt% carageenan (nHA-Ag-CG1.5) was found to be 0.36 ± 0.07 MPa that increased in case of nHA-Ag-CG3.0 demonstrating better interfacial compatibility of their matrix with respect to the reinforcement. This increase in reinforcement concentration resulted in higher stiffness that dissipated energy. The higher swelling ratio is envisaged to induce better cell adhesion and proliferation. The biodegradability test was performed in phosphate buffered saline at body temperature for 3 weeks. The biodegradability rate of nHA-Ag-CG1.5 was found to be equivalent to nHA-Ag-CG3.0 hydrogels at day 7 while it increased faster in nHA-Ag-CG3.0 on days 14 and 21 that may be ascribed to the possible interaction of nHA and Ag with their CG matrix. The bacterial cell viability of Staphylococcus aureus (S. aureus) was performed after 10 h, 20 h and 30 h of culture. The nHA-Ag-CG1.5 exhibited restrained growth of S. aureus as compared to nHA-Ag-CG3.0 and these results were validated by CLSM analysis. Hence, nHA-Ag-CG3.0 may be considered to have more cytocompatibility than nHA-Ag-CG 1.5.

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Section: Resultsmentioning

confidence: 99%

Fabrication of silver doped nano hydroxyapatite-carrageenan hydrogels for articular cartilage applications

Swain

Kwon²,

Rautray

2021

Preprint

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“…A growing interest for the production and employment of HAm on diverse applications, including AM technologies [26][27][28] and biomedical fields [29][30][31][32] can be observed in an increase of the number of research works focused on these materials during the most recent years. Though, it can be observed that not many studies are focused on the production of HAm through SD, neither on the evaluation of the experimental conditions on the final dried HAm properties (e.g., flowability).…”

Section: Introductionmentioning

confidence: 99%

Tailoring hydroxyapatite microspheres by spray-drying for powder bed fusion feedstock

et al. 2022

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The present work deals with a study on the physical characteristics of hydroxyapatite microspheres produced by spray-drying process through different operating conditions. Obtained hydroxyapatite microspheres will be used as powder feedstock in powder bed selective laser processing additive manufacturing technologies where the flowability and the particle size distribution of the powder feedstock is of special importance. Spray air pressure and solid content of the slurries were the most influent parameters to control the final particle size distribution, while higher air pressure and temperatures gave the higher process recovery rate. The use of polyvinyl alcohol as organic binder increased the granules strength. The produced hydroxyapatite microspheres were found to fulfil the powder bed selective laser processing feedstock requirements, keeping the physico-chemical properties of the material. These promising results confirm the use of a spray dryer as an efficient method for the production of hydroxyapatite microspheres for powder bed selective laser processing.

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“…Metal nanoparticles (e.g., Ag and Cu) have been widely studied for their biocidal properties and are usually suspended in a matrix support for further applications. [ 13–15 ] Metal nanoparticles bind with bacterial cell membranes or viral proteins, disrupting the integrity of a cell or virus and inducing oxidative stress in the nucleic acids by generating ROS. [ 16,17 ] However, the uncontrollable aggregation of nanoparticles hinders their applications.…”

Section: Introductionmentioning

confidence: 99%

“…Metal nanoparticles (e.g., Ag and Cu) have been widely studied for their biocidal properties and are usually suspended in a matrix support for further applications. [13][14][15] Metal nanoparticles bind with bacterial cell membranes or viral proteins, disrupting the integrity of a cell or virus and inducing oxidative Rapid spread of infectious diseases is a global threat and has an adverse impact on human health, livelihood, and economic stability, as manifested in the ongoing coronavirus disease 2019 (COVID-19) pandemic. Even though people wear a face mask as protective equipment, direct disinfection of the pathogens is barely feasible, which thereby urges the development of biocidal agents.…”

Section: Introductionmentioning

confidence: 99%

Breathing‐Driven Self‐Powered Pyroelectric ZnO Integrated Face Mask for Bioprotection

Kim

Song

Lee

et al. 2022

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Rapid spread of infectious diseases is a global threat and has an adverse impact on human health, livelihood, and economic stability, as manifested in the ongoing coronavirus disease 2019 (COVID‐19) pandemic. Even though people wear a face mask as protective equipment, direct disinfection of the pathogens is barely feasible, which thereby urges the development of biocidal agents. Meanwhile, repetitive respiration generates temperature variation wherein the heat is regrettably wasted. Herein, a biocidal ZnO nanorod‐modified paper (ZNR‐paper) composite that is 1) integrated on a face mask, 2) harvests waste breathing‐driven thermal energy, 3) facilitates the pyrocatalytic production of reactive oxygen species (ROS), and ultimately 4) exhibits antibacterial and antiviral performance is proposed. Furthermore, in situ generated compressive/tensile strain of the composite by being attached to a curved mask is investigated for high pyroelectricity. The anisotropic ZNR distortion in the bent composite is verified with changes in ZnO bond lengths and OZnO bond angles in a ZnO4 tetrahedron, resulting in an increased polarization state and possibly contributing to the following pyroelectricity. The enhanced pyroelectric behavior is demonstrated by efficient ROS production and notable bioprotection. This study exploring the pre‐strain effect on the pyroelectricity of ZNR‐paper might provide new insights into the piezo‐/pyroelectric material‐based applications.

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Silver-incorporated hydroxyapatite–albumin microspheres with bactericidal effects

Cited by 20 publications

References 47 publications

Fabrication of silver doped nano hydroxyapatite-carrageenan hydrogels for articular cartilage applications

Fabrication of silver doped nano hydroxyapatite-carrageenan hydrogels for articular cartilage applications

Tailoring hydroxyapatite microspheres by spray-drying for powder bed fusion feedstock

Breathing‐Driven Self‐Powered Pyroelectric ZnO Integrated Face Mask for Bioprotection

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