Synthesis and Characterization of Noble Au Nanoparticle Suspensions Obtained by Electrical Explosion of Wires in Deionized Water

A novel amphipathic chitosan derivative, O-acetyl-chitosan acetic ester (ACHA), was synthesized by the reaction of chitosan with acetic acid in the presence of thionyl chloride. The physicochemical properties of ACHA were characterized by FTIR, 1H NMR, TGA, and XRD. The yield (Y) of ACHA was 79.4%, and the degree of acetylation (DA) of ACHA was 1.04. Compared to CS, ACHA could be dissolved in many organic solvents, deionized water, and aqueous solution. Our results showed that ACHA exhibited a superior antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. These findings indicated that ACHA was preferable for use as antimicrobial agents in wound healing, food preservative, and tissue engineering.

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Synthesis and characterization of magnetic of Ni/ABS nanocomposites by electrical explosion of wire in liquid and solution blending methods

Metals and Materials International ◽

10.1007/s12540-017-6533-z ◽

2017 ◽

Vol 23 (2) ◽

pp. 391-396 ◽

Cited By ~ 1

Author(s):

Minh Thuyet-Nguyen ◽

Hong Hai-Nguyen ◽

Won Joo Kim ◽

Ho Yoon Kim ◽

Jin-Chun Kim

Keyword(s):

Electrical Explosion ◽

Synthesis And Characterization ◽

Solution Blending

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Synthesis and characterization of long-CNTs by electrical arc discharge in deionized water and NaCl solution

International Nano Letters ◽

10.1007/s40089-018-0227-5 ◽

2018 ◽

Vol 8 (1) ◽

pp. 19-23 ◽

Cited By ~ 8

Author(s):

Amir Hossein Sari ◽

Arezoo Khazali ◽

Sara Sadat Parhizgar

Keyword(s):

Arc Discharge ◽

Deionized Water ◽

Synthesis And Characterization ◽

Nacl Solution ◽

Electrical Arc

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The Potential of Tantalum-Doped Mesoporous Bioactive Glasses for Hemostasis

10.32920/ryerson.14644308 ◽

2021 ◽

Author(s):

Andrew Mendonca

Keyword(s):

Thermal Expansion ◽

Bleeding Time ◽

Sol Gel ◽

Deionized Water ◽

Channel Structure ◽

Synthesis And Characterization ◽

Dead Cell ◽

Bioactive Glasses ◽

Cell Assays

Synthesis and characterization of the first mesoporous bioactive glasses (MBGs) containing tantalum (Ta) are reported, alongside their potential as hemostats. A series of silica MBGs with the molar composition of (80-x)% Si, 15% Ca, 5% P and x% Ta, with x = 0 to 10, were synthesized by the sol-gel method. Increasing Ta content from 1 to 10 mol% caused a decrease in the surface area and pore volume of ~20% and ~35%, respectively, due to the increase in non-bridging oxygens and mismatch of thermal expansion coefficient which creates discontinuities in the ordered channel structure. However, the effect is not significant on the amount of ions released from the samples into deionized water, for short durations (<60 min). In a mouse tail cut model, a significant decrease (≥ 50%) in average bleeding time was found for Ta-MBGs compared to controls (commercial hemostat Arista® and a Ta-free MBG). There was no significance in hemolytic activity between plain blood and when MBG is present and cytotoxicity results show that increasing Ta content from 0 to 10% reduced MBG toxicity by more than 15%; this effect was visually confirmed by live/dead cell assays. Further studies are proposed to determine the mechanism of Ta involvement with the hemostatic process.

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The Potential of Tantalum-Doped Mesoporous Bioactive Glasses for Hemostasis

10.32920/ryerson.14644308.v1 ◽

2021 ◽

Author(s):

Andrew Mendonca

Keyword(s):

Thermal Expansion ◽

Bleeding Time ◽

Sol Gel ◽

Deionized Water ◽

Channel Structure ◽

Synthesis And Characterization ◽

Dead Cell ◽

Bioactive Glasses ◽

Cell Assays

Synthesis and characterization of the first mesoporous bioactive glasses (MBGs) containing tantalum (Ta) are reported, alongside their potential as hemostats. A series of silica MBGs with the molar composition of (80-x)% Si, 15% Ca, 5% P and x% Ta, with x = 0 to 10, were synthesized by the sol-gel method. Increasing Ta content from 1 to 10 mol% caused a decrease in the surface area and pore volume of ~20% and ~35%, respectively, due to the increase in non-bridging oxygens and mismatch of thermal expansion coefficient which creates discontinuities in the ordered channel structure. However, the effect is not significant on the amount of ions released from the samples into deionized water, for short durations (<60 min). In a mouse tail cut model, a significant decrease (≥ 50%) in average bleeding time was found for Ta-MBGs compared to controls (commercial hemostat Arista® and a Ta-free MBG). There was no significance in hemolytic activity between plain blood and when MBG is present and cytotoxicity results show that increasing Ta content from 0 to 10% reduced MBG toxicity by more than 15%; this effect was visually confirmed by live/dead cell assays. Further studies are proposed to determine the mechanism of Ta involvement with the hemostatic process.

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