a simple, precise, inexpensive and sensitive voltammetric method has been developed for the determination of gemifloxacin mesylate (gem) in the presence of tween 80 in the bulk, farmaceutical dosage forms and human urine at gold nanoparticles modified carbon paste electrode (gncpe). the electrochemical behavior of gem has been investigated by using cyclic voltammetry (cv) and differential pulse...

due to the binding of the –coo- group with the mercury (ii), gold nanoparticlesfunctionalized with glutathione can self-assemble to form a supermolecular network in the hac-naac buffer solution. the aggregation of functionalized gold nanoparticles and mercury (ii)caused the shift of maximum absorption peak of the uv-vis spectrum from 520 nm to 609 nm.based on this principle, a simple spectropho...

objective(s): our present study sought to evaluate hepatoprotective and antioxidant effects of methanol extract of azolla microphylla phytochemically synthesized gold nanoparticles (gnap) in acetaminophen (apap) - induced hepatotoxicity of fresh water common carp fish.materials and methods: gnap were prepared by green synthesis method using methanol extract of azolla microphylla.  twenty four f...

one of the applications of gold nanoparticles (gnps) in medicine is radiation dose-enhancing effect. although there are many simulations, in vitro and in vivo evidence that gnps can enhance significantly the radiation dose effect of orthovoltage beams. these beams compared with megavoltage (mv) beams, have limited applications in radiotherapy. in order to evaluate gnps radiosensitization perfor...

In this study, we prepared different shapes of gold nanoparticles by seed-mediated growth method and applied them on the photoelectrodes of dye-sensitized solar cells (DSSCs) to study the surface plasma resonant (SPR) effect of gold nanoparticles on the photoelectrodes of dye-sensitized solar cells. The analyses of field emission scanning electron microscopy show that the average diameter of th...

In this study, we have synthesized the gold nanoparticles by using Hibiscus rosa-sinensis, a medicinal plant. The gold nanoparticles were synthesized rapidly by the involvement of microwave heating. By changing of plant extract concentration, gold solution concentration, microwave heating time and power of microwave heating the optimized condition was identified. The surface Plasmon resonance f...

Herein we report the development of anisotropic bimetallic nanoparticles where aerosol gold nanoparticles served as the seeds for the continuous deposition of silver atoms on their surfaces. Initially, aerosol gold nanoparticles were formed by spark discharge and then injected into a silver precursor solution in an impinging device. The gold nanoparticles acted as the seed particles, and cataly...

In the past decade, gold nanoparticles have attracted strong interest from the nanobiotechnological community owing to the significant progress made in robust and easy-to-make synthesis technologies, in surface functionalization, and in promising biomedical applications. These include bioimaging, gene diagnostics, analytical sensing, photothermal treatment of tumors, and targeted delivery of va...

Although biomedical applications of functionalized nanoparticles have taken significant strides, biological characterization of unmodified nanoparticles remains unclear. In the present study, we investigated the cell viability and invasion activity of gastric cancer cells after treatment with gold nanoparticles. The growth of SGC-7901 cells was inhibited significantly after treatment with 5-nm ...