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Polyvinylpyrrolidone (PVP), also commonly called polyvidone or povidone, is a water-soluble polymer compound made from the monomer N-vinylpyrrolidone. [1] PVP is available in a range of molecular weights and related viscosities, and can be selected according to the desired application properties.
Silver nanoparticles can undergo coating techniques that offer a uniform functionalized surface to which substrates can be added. When the nanoparticle is coated, for example, in silica the surface exists as silicic acid. Substrates can thus be added through stable ether and ester linkages that are not degraded immediately by natural metabolic ...
A nanoparticle or ultrafine particle is a particle of matter 1 to 100 nanometres (nm) in diameter. [1] [2] The term is sometimes used for larger particles, up to 500 nm, or fibers and tubes that are less than 100 nm in only two directions. [2]: 394 At the lowest range, metal particles smaller than 1 nm are usually called atom clusters instead.
Percoll itself specifically consists of polydisperse silica nanoparticles 15–30 nm diameter (23% w/w in water) which have been coated with polyvinylpyrrolidone (PVP). Percoll is well suited for density gradient experiments because it possesses a low viscosity compared to alternatives, a low osmolarity , and no toxicity towards cells and their ...
Silver nanoparticles can circulate through the body and accumulate easily in multiple organs, as discovered in a study on the silver nanoparticle distribution in rats. [30] Traces of silver accumulated in the rats' lungs, spleen, kidney, liver, and brain after the nanoparticles were injected subcutaneously. [ 30 ]
Nanoparticles can enhance the effects of traditional antibiotics which a bacterium may have become resistant to, and decrease the overall minimum inhibitory concentration (MIC) required for a drug. Silver nanoparticles improve the activity of amoxicillin , penicillin , and gentamicin in bacteria by altering membrane permeability and improving ...
Ostwald ripening in palladium nanoparticles dissolved in formaldehyde at 6 (a), 24 (b), 48 (c) and 72 hours (d). The small palladium particles are being consumed as the larger ones grow bigger. [ 1 ] Growth of bubbles in a liquid foam via Ostwald ripening.
Poly(4-vinylphenol), also called polyvinylphenol or PVP, is a plastic structurally similar to polystyrene. It is produced from the monomer 4-vinylphenol, which is also referred to as 4-hydroxystyrene. PVP is used in electronics as a dielectric layer in organic transistors in organic TFT LCD displays.
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