Abstract The influence of microenvironments on the culture of osteoblast-like cells (MG-63) has b... more Abstract The influence of microenvironments on the culture of osteoblast-like cells (MG-63) has been investigated using parylene films with different surfaces, such as parylene-N film, UV-modified parylene-N film, functional parylene film with amine groups (parylene-A), and UV-modified parylene-A film. In this work, parylene-N film was found to induce dramatic changes in cell adhesion and cell viability before and after UV-treatment with respect to the culture of osteoblast-like cells (MG-63). The influences of such a chemical environment on cell culture were investigated in relation to the cell proliferation (viability and proliferation rate) and the cell physiology (cell cycle, protein synthesis, and differentiation) of cells grown on parylene-N film, UV-modified parylene-N film, parylene-A film, and UV-modified parylene-A film in comparison with cells grown on a polystyrene surface.
Journal of The Korean Ceramic Society, Aug 9, 2021
Due to porous structure, larger specific area, and potential to functionalize further, metal–orga... more Due to porous structure, larger specific area, and potential to functionalize further, metal–organic frameworks (MOFs) are gaining attention in various fields, including electrochemical sensing of various analytes. MOFs are known to have excellent electrochemical activity because they mainly constitute a rich metallic center, possess huge specific area, and have multiple valence states. However, electrocatalytic activities of MOFs are greatly reduced due to their poor electronic conductivity for which high conductivity species are incorporated into the MOFs. In the present work, Co-based MOF (ZIF-67) was used as a porous matrix to encapsulate silver nanoparticles (Ag NPs) and on the surface of ZIF-67 multi-walled carbon nanotubes (MWCNTs) were decorated to obtain Ag@ZIF-67/MWCNT nanocomposite for the non-enzymatic electrochemical detection of glucose. The surface morphology of the synthesized nanocomposite was investigated by scanning electron microscopy, while crystallographic characterization was performed by X-ray powder diffraction. Cyclic voltammetry and chronoamperometry techniques were used to for the electrochemical monitoring of glucose. The electrochemical results demonstrated that Ag@ZIF-67/MWCNT showed an improved catalytic activity towards glucose in the concentration range of 33 μM to 400 μM with a low detection limit of 0.49 μM (S/N = 3), and reaction sensitivity of 13.014 μA μM−1 cm−2 as well as good selectivity in presence of ascorbic acid and uric acid.
Purpose This work aimed to study the drug delivery applications of iron oxide (Fe3O4) nanoparticl... more Purpose This work aimed to study the drug delivery applications of iron oxide (Fe3O4) nanoparticles with strontium (Sr) doping with varying molar ratios prepared by the co-precipitation route. The impact of increased strontium content on the particle size and magnetic properties was investigated. The impending of these nanoparticles for drug loading, drug release, and their respective cytotoxicity was also inspected.Methods First, iron oxide nanoparticles were doped with various amounts of strontium, from 0.25, 0.50, and 0.75, to 1 mole using co-precipitation method. These synthesized nanoparticles were characterized by XRD, SEM, EDX, VSM, and FTIR for evaluating crystal structure, phase purity, morphology, composition, magnetic properties, and functional groups, respectively. Drug loading and drug release properties were determined using UV-vis spectroscopy, whereas MTT assay evaluated cytotoxicity.Results The findings confirmed the successful doping of iron oxide with strontium vi...
Abstract The influence of microenvironments on the culture of osteoblast-like cells (MG-63) has b... more Abstract The influence of microenvironments on the culture of osteoblast-like cells (MG-63) has been investigated using parylene films with different surfaces, such as parylene-N film, UV-modified parylene-N film, functional parylene film with amine groups (parylene-A), and UV-modified parylene-A film. In this work, parylene-N film was found to induce dramatic changes in cell adhesion and cell viability before and after UV-treatment with respect to the culture of osteoblast-like cells (MG-63). The influences of such a chemical environment on cell culture were investigated in relation to the cell proliferation (viability and proliferation rate) and the cell physiology (cell cycle, protein synthesis, and differentiation) of cells grown on parylene-N film, UV-modified parylene-N film, parylene-A film, and UV-modified parylene-A film in comparison with cells grown on a polystyrene surface.
Journal of The Korean Ceramic Society, Aug 9, 2021
Due to porous structure, larger specific area, and potential to functionalize further, metal–orga... more Due to porous structure, larger specific area, and potential to functionalize further, metal–organic frameworks (MOFs) are gaining attention in various fields, including electrochemical sensing of various analytes. MOFs are known to have excellent electrochemical activity because they mainly constitute a rich metallic center, possess huge specific area, and have multiple valence states. However, electrocatalytic activities of MOFs are greatly reduced due to their poor electronic conductivity for which high conductivity species are incorporated into the MOFs. In the present work, Co-based MOF (ZIF-67) was used as a porous matrix to encapsulate silver nanoparticles (Ag NPs) and on the surface of ZIF-67 multi-walled carbon nanotubes (MWCNTs) were decorated to obtain Ag@ZIF-67/MWCNT nanocomposite for the non-enzymatic electrochemical detection of glucose. The surface morphology of the synthesized nanocomposite was investigated by scanning electron microscopy, while crystallographic characterization was performed by X-ray powder diffraction. Cyclic voltammetry and chronoamperometry techniques were used to for the electrochemical monitoring of glucose. The electrochemical results demonstrated that Ag@ZIF-67/MWCNT showed an improved catalytic activity towards glucose in the concentration range of 33 μM to 400 μM with a low detection limit of 0.49 μM (S/N = 3), and reaction sensitivity of 13.014 μA μM−1 cm−2 as well as good selectivity in presence of ascorbic acid and uric acid.
Purpose This work aimed to study the drug delivery applications of iron oxide (Fe3O4) nanoparticl... more Purpose This work aimed to study the drug delivery applications of iron oxide (Fe3O4) nanoparticles with strontium (Sr) doping with varying molar ratios prepared by the co-precipitation route. The impact of increased strontium content on the particle size and magnetic properties was investigated. The impending of these nanoparticles for drug loading, drug release, and their respective cytotoxicity was also inspected.Methods First, iron oxide nanoparticles were doped with various amounts of strontium, from 0.25, 0.50, and 0.75, to 1 mole using co-precipitation method. These synthesized nanoparticles were characterized by XRD, SEM, EDX, VSM, and FTIR for evaluating crystal structure, phase purity, morphology, composition, magnetic properties, and functional groups, respectively. Drug loading and drug release properties were determined using UV-vis spectroscopy, whereas MTT assay evaluated cytotoxicity.Results The findings confirmed the successful doping of iron oxide with strontium vi...
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