The effects of particle size on the skin permeation and retention of piroxicam (PXC) in an aqueous suspension were investigated. PXC particles of about 23 nm, 173 nm, and 2.1 microm in size were prepared by the cogrinding of PXC/polyvinylpyrrolidone (PVP) K12/sodium dodecyl sulfate physical mixture (mean particle size, 9.6 microm) using a vibrational rod and ball mills. Particles were stable af...

This study investigated the antimicrobial activity of polyvinylpyrrolidone-capped silver nanoparticles (PVP-AgNPs) in vitro against two antibiotic-resistant isolates Aeromonas hydrophila and A. caviae. Solid crystal were synthesized by chemical reduction approach employing polyvinylpyrrolidone (PVP) as a neutral stabilizer, glucose reducing agent, sodium hydroxide catalyst. The crystallinity pu...

The regularities of obtaining silver nanoparticles in the presence polyvinylpyrrolidone, which was both a reductant and stabilizer nanoparticle dispersion, have been studied. influence such factors as temperature, polyvinylpyrrolidone amount, concentration nature salts on shape size has established. chemistry reaction with formation vinylsuccinimide units structure macromolecules proposed, is c...

Published methods to isolate DNA from insects are not always effective in xylophagous insects because they have high concentrations of phenolics and other secondary plant compounds in their digestive tracts. A simple, reliable and labor-effective cetyltrimethylammonium bromide-polyvinylpyrrolidone (CTAB-PVP) method for isolation of high quality DNA from xylophagous insects is described. This me...

Transparent BaTiO(3):Eu(3+) films were prepared via a sol-gel method and dip-coating technique, using barium acetate, titanium butoxide, and polyvinylpyrrolidone (PVP) as modifier viscosity. BaTiO(3):Eu(3+) films ~500 nm thick, crystallized after thermal treatment at 700 masculineC. The powders revealed spherical and rod shape morphology. The optical quality of films showed a predominant band a...

OBJECTIVE To determine whether biofilm formation on silicone tympanostomy tubes (TTs) is prevented by polyvinylpyrrolidone (PVP) coating. DESIGN In vitro microbiologic study. SUBJECTS Silicone TTs with and without a PVP coating. INTERVENTION The TTs were exposed to blood or phosphate-buffered saline and cultured with Pseudomonas aeruginosa or Staphylococcus aureus. After 4 days, antibioti...

The effect of solvent power and flow rate on the permeability of a size exclusion chromatography (SEC) column packed with a novel polyvinylpyrrolidone (PVP)-grafted porous silica resin was studied. The PVP-silica resin was prepared from a porous silica size exclusion resin onto which a terminally anchored PVP layer was graft polymerized. The terminally anchored PVP layer was synthesized via a f...

The band gaps of bismuth vanadate (BiVO₄) and bismuth sulfide (Bi₂S₃) are about 2.40 eV and 1.30 eV, respectively. Although both BiVO₄ and Bi₂S₃ are capable of strong visible light absorption, electron-hole recombination occurs easily. To solve this problem, we designed a one-step hydrothermal method for synthesizing a Bismuth sulfide (Bi₂S₃)/Bismuth vanadate (BiVO₄) heterojunction using polyvi...