scholarly journals Antimicrobial Efficacy and Cell Adhesion Inhibition of In Situ Synthesized ZnO Nanoparticles/Polyvinyl Alcohol Nanofibrous Membranes

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Jian Li ◽  
Qun Zhang ◽  
Minjing Xu ◽  
Changzhu Wu ◽  
Ping Li
Keyword(s):  
Cell Adhesion ◽  
Polyvinyl Alcohol ◽  
Zno Nanoparticles ◽  
Zinc Acetate ◽  
Membrane Damage ◽  
Antimicrobial Activities ◽  
Zno Nps ◽  
Adhesion Inhibition ◽  
Nanofibrous Membranes

Nanoparticle metal oxides are emerging as a new class of important materials in medical, agricultural, and industrial applications. In this context, free zinc oxide (ZnO) nanoparticles (NPs) have been increasingly shown with broad antimicrobial activities. However, biological properties of immobilized ZnO NPs on matrixes like nanofibrous membranes are still limited. In this study, in situ synthesized ZnO NPs/polyvinyl alcohol (PVA) nanofibrous membranes were fabricated by electrospinning with different zinc acetate concentrations. Characterization results indicated that, with 5 mM zinc acetate, uniform size ZnO NPs (~40 nm) were formed and evenly distributed on the membrane surface. The surfaces became more hydrophobic with higher concentration of zinc acetate. ZnO NPs/PVA nanofibrous membranes showed a broad spectrum of antimicrobial activities and cell adhesion inhibiting effects against four microorganisms including Gram-positive Staphylococcus aureus, Gram-negative Escherichia coli, fungi Candida albicans, and spores of Aspergillus niger. Our data revealed that the major antimicrobial mechanism could be attributed to cell membrane damage and cellular internalization of ZnO NPs, while the hydrophobic surface of the membrane primarily contributed to the cell adhesion inhibition. This study suggests that ZnO NPs/PVA nanofibrous membranes could potentially be used as an effective antimicrobial agent to maintain agricultural and food safety.

scholarly journals Bioactive 3D-Shaped Wound Dressings Synthesized from Bacterial Cellulose: Effect on Cell Adhesion of Polyvinyl Alcohol Integrated In Situ

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Marlon Osorio ◽  
Jorge Velásquez-Cock ◽  
Luz Marina Restrepo ◽  
Robín Zuluaga ◽  
Piedad Gañán ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Polyvinyl Alcohol ◽  
Bacterial Cellulose ◽  
Skin Ulcer ◽  
Wound Dressings ◽  
Size Exclusion ◽  
Collagen Fibres ◽  
Bioactive Materials ◽  
Ulcer Treatment

We investigated wound dressing composites comprising fibrils of bacterial cellulose (BC) grown by fermentation in the presence of polyvinyl alcohol (PVA) followed by physical crosslinking. The reference biointerface, neat BC, favoured adhesion of fibroblasts owing to size exclusion effects. Furthermore, it resisted migration across the biomaterial. Such effects were minimized in the case of PVA/BC membranes. Therefore, the latter are suggested in cases where cell adhesion is to be avoided, for instance, in the design of interactive wound dressings with facile exudate control. The bioactivity and other properties of the membranes were related to their morphology and structure and considered those of collagen fibres. Bioactive materials were produced by simple 3D templating of BC during growth and proposed for burn and skin ulcer treatment.

Green synthesis of ZnO nanoparticles with Veronica multifida and their antibiofilm activity

2019 ◽  
Vol 39 (3) ◽  
pp. 319-327 ◽  
Author(s):  
S Şahin Doğan ◽  
A Kocabaş
Keyword(s):  
Electron Microscope ◽  
Zno Nanoparticles ◽  
Zinc Acetate Dihydrate ◽  
Antimicrobial Activities ◽  
Industrial Applications ◽  
Antibiofilm Activity ◽  
Zno Nps ◽  
Coating Materials ◽  
Wide Range ◽  
Pharmaceutical Industries

In the present study, Veronica multifida leaf extract and zinc acetate dihydrate were utilized to synthesize zinc oxide (ZnO) nanoparticles (NPs) eco-friendly and cost-effectively under different physical conditions. Soxhlet extractor was used for the preparation of aqueous plant extract. UV-Vis (ultraviolet–visible) spectrophotometer, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscope (TEM) were used to characterize the ZnO NPs. UV-Vis spectrophotometer in the range of 200–800 nm was used to get information about the formation of ZnO NPs at different pH and temperatures. FTIR spectrum revealed the presence of functional groups in ZnO NPs. XRD, scanning electron microscope, and TEM analyses confirmed the crystal structure and average size of ZnO NPs. The antimicrobial activities of ZnO NPs were tested on microorganisms, that is, Escherichia coli ATCC 43895 , Staphylococcus aureus ATCC 29213 , Bacillus subtilis, Bacillus licheniformis, Pseudomonas aeruginosa, and Salmonella typhimurium. Moreover, antibiofilm activity of ZnO NPs was performed against P. aeruginosa and S. aureus ATCC 29213. ZnO NPs have shown effective antimicrobial and antibiofilm activities against tested microorganisms. The results elucidated that eco-friendly and cost-effectively produced ZnO NPs could be used as coating materials and in a wide range of industrial applications, such as pharmaceutical industries and cosmetics.

Comparison Study on Antimicrobial and Photocatalytic Activity of Different Shaped ZnO Nanoparticles

2019 ◽  
Vol 288 ◽  
pp. 87-97
Author(s):  
Ariunzaya Tsogoo ◽  
Solongo Batmandakh ◽  
Erdene Ochir Ganbold ◽  
Ninjbadgar Tsedev ◽  
Philippe Daniel ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Zno Nanoparticles ◽  
Zinc Acetate ◽  
Reaction Rates ◽  
Size Analysis ◽  
Phase Method ◽  
Blue Dye ◽  
Zno Nps ◽  
X Ray ◽  
Zinc Acetylacetonate

ZnO nanoparticles (ZnO NPs) were synthesized through surfactant free non-hydrolytic organic phase method in which zinc acetate and zinc acetylacetonate were selected as precursors. Structural and size analysis of the as-prepared nanoparticles performed on X-ray diffractometer, transmission electron microscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy showed that the obtained nanoparticles were crystalline particles with all reflections matching to wurtzite. TEM images revealed that ZnO NPs from synthesis in which zinc acetate involved as precursor had a shape of sphere while zinc acetylacetonate resulted in rod-shaped nanoparticles. Reaction rates from catalytic activity test performed on Methylene Blue dye (MB) were found to be 2.99×10-2 min-1 and 1.98×10-2 min-1 for spherical and rod-shaped ZnO NPs, respectively. Antibacterial activity experiments shows rod-shaped ZnO NPs almost completely (99.75%) inhibited the growth of Escherichia Coli while only around 6.5% was survived after treatment of spherical ZnO NPs under same conditions.

scholarly journals Preparation ofZincOxide Nanoparticles by UV-IrradiationMethod in Two Different Media

2021 ◽  
Vol 2114 (1) ◽  
pp. 012079
Author(s):  
Noor AlhudaMahammed Noori ◽  
Mahdi A. Mohammed
Keyword(s):  
Polyvinyl Alcohol ◽  
Aqueous Medium ◽  
Zinc Acetate ◽  
Deionized Water ◽  
Ease Of Use ◽  
Ultraviolet Rays ◽  
Zno Nps ◽  
Uv Visible ◽  
Polymeric Medium

Abstract The zinc oxidenanoparticles(ZnO NPs) were prepared in two media. The first one was in an aqueous medium resulting from the reaction of urea with zinc acetate at 0.3M concentration in both of them in deionized water. The second medium is a polymeric solution which is a dissolving of 4% polyvinyl alcohol (PVA)in deionized water with zinc acetate. The nanoparticles were obtained after the two media were irradiated with ultraviolet rays for 30 min. According to the characterization of the XRD, FESEM, and UV-visible, the polymeric medium gives a less granular size in addition to its ease of use and handling.

An efficient approach to strengthen polyvinyl alcohol physical hydrogel via in situ growing NH2-decorated polysiloxane structures

2021 ◽  
Vol 290 ◽  
pp. 129505
Author(s):  
Haining Wang ◽  
Birong Tian ◽  
Fu Wang ◽  
Jinyun Zhang ◽  
Zhaofeng Wang
Keyword(s):  
Polyvinyl Alcohol ◽  
Efficient Approach

scholarly journals Antibacterial and Photocatalytic Properties of ZnO Nanoparticles Obtained from Chemical versus Saponaria officinalis Extract-Mediated Synthesis

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2072
Author(s):  
Maria Antonia Tănase ◽  
Maria Marinescu ◽  
Petruta Oancea ◽  
Adina Răducan ◽  
Catalin Ionut Mihaescu ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Zno Nanoparticles ◽  
Model Compound ◽  
Size Composition ◽  
Inorganic Nanoparticles ◽  
Bacterial Strains ◽  
X Ray Diffraction ◽  
Zno Nps ◽  
Reaction Conditions ◽  
Saponaria Officinalis

In the present work, the properties of ZnO nanoparticles obtained using an eco-friendly synthesis (biomediated methods in microwave irradiation) were studied. Saponaria officinalis extracts were used as both reducing and capping agents in the green nanochemistry synthesis of ZnO. Inorganic zinc oxide nanopowders were successfully prepared by a modified hydrothermal method and plant extract-mediated method. The influence of microwave irradiation was studied in both cases. The size, composition, crystallinity and morphology of inorganic nanoparticles (NPs) were investigated using dynamic light scattering (DLS), powder X-ray diffraction (XRD), SEM-EDX microscopy. Tunings of the nanochemistry reaction conditions (Zn precursor, structuring agent), ZnO NPs with various shapes were obtained, from quasi-spherical to flower-like. The optical properties and photocatalytic activity (degradation of methylene blue as model compound) were also investigated. ZnO nanopowders’ antibacterial activity was tested against Gram-positive and Gram-negative bacterial strains to evidence the influence of the vegetal extract-mediated synthesis on the biological activity.

scholarly journals Nanoparticles induce genetic, biochemical, and ultrastructure variations in Salvadora persica callus

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Manar S. Fouda ◽  
Mohamed H. Hendawey ◽  
Ghada A. Hegazi ◽  
Hayat M. Sharada ◽  
Nagwa I. El-Arabi ◽  
...  
Keyword(s):  
Folk Medicine ◽  
Antimicrobial Activities ◽  
In Vitro Production ◽  
Salvadora Persica ◽  
Zno Nps ◽  
Active Constituent ◽  
Benzyl Isothiocyanate ◽  
Stress Markers ◽  
The Impact

Abstract Background Salvadora persica is an endangered medicinal plant due to difficulties in its traditional propagation. It is rich in bioactive compounds that possess many pharmaceutical, antimicrobial activities and widely used in folk medicine. The current study aims at in vitro propagation of Salvadora persica and the application of different nanoparticles (NPs) to induce the synthesis of bioactive and secondary metabolites within the plant. The cellular and genetic responses to the application of different NPs were evaluated. Results The impact of nanoparticles NPs (ZnO, SiO2, and Fe3O4) on callus growth of Salvadora persica and the production of its active constituent benzyl isothiocyanate was examined, regarding some oxidative stress markers, antioxidant enzymes, and genetic variabilities. An encouraging impact of 0.5 mg/l ZnO NPs on benzyl isothiocyanate production was shown reaching up to 0.905 mg/g callus fresh weight in comparison to 0.539 mg/g in control callus. This was associated with decreasing hydrogen peroxide content and increasing superoxide dismutase and peroxidase activities. The deposition of the NPs on cellular organelles was detected using a transmission microscope. Fifteen Inter-Simple Sequence Repeats (ISSR) primers detected an overall, 79.1% polymorphism among different treatments. A reduction in genomic DNA template stability (GTS) was made and was more pronounced in higher doses of different NPs. Conclusion This study is a stepping stone in developing a productive protocol for in vitro production of benzyl isothiocyanate from Salvadora persica using NPs as a valuable anticancer compound.

Electrospun Polyethylene Glycol/Polyvinyl Alcohol Composite Nanofibrous Membranes as Shape-Stabilized Solid–Solid Phase Change Materials

2020 ◽  
Vol 2 (3) ◽  
pp. 167-177 ◽  
Author(s):  
Junwen Huang ◽  
Houyong Yu ◽  
Somia Yassin Hussain Abdalkarim ◽  
Jaromir Marek ◽  
Jiri Militky ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Polyvinyl Alcohol ◽  
Phase Change ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Nanofibrous Membranes

Power conversion efficiency of hybrid solar cells based on Camellia sinensis doped polyvinyl alcohol and ZnO nanoparticles

2021 ◽  
Vol 120 ◽  
pp. 111434
Author(s):  
Arif Allah Rakha ◽  
Monas Shahzad ◽  
Abdul Ghaffar ◽  
Khalid Javed ◽  
Aneel Pervez ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polyvinyl Alcohol ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Camellia Sinensis ◽  
Zno Nanoparticles ◽  
Power Conversion ◽  
Hybrid Solar Cells
Sign in / Sign up

Export Citation Format

Share Document