polyvinyl alcohol


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polyvinyl alcohol

A water-soluble synthetic resin used in preparing medicines, esp. ophthalmic solutions.
See also: alcohol

wetting solution 

A solution that (1) transforms a hydrophobic surface into a hydrophilic one; (2) acts as a lubricant; (3) helps to clean the surface; (4) helps to prevent contamination of the lens while being inserted. It is spread on both surfaces of a rigid contact lens prior to insertion. However, the effect of a wetting solution only lasts a short time because it is quickly removed by the tear layer. A common wetting agent is polyvinyl alcohol, which also has viscosity building properties. See enzyme; artificial tears.
References in periodicals archive ?
A comprehensive analysis of the report of the Polyvinyl Alcohol (PVA) Films market is provided, which includes the global presence of crucial driver and constraints that are working in the proliferation of the Polyvinyl Alcohol (PVA) Films market.
The probable structure of proposed proton exchange membrane based on polyvinyl alcohol and addition of hydrated tin oxide is shown in Fig.
"Influence of Erbium Ions on the Optical and Structural Properties of Polyvinyl Alcohol", Journal of Spectroscopy, Article ID 204867, 7.
The HTC is the newest addition to Celanese's emulsion polymers and polyvinyl alcohol network, which includes existing facilities in Frankfurt, Germany, and Shanghai, China.
Given a cup of polyvinyl alcohol with a squirt of tempera paint, the junior scientists were instructed to stir.
It is knitted from polyvinyl alcohol of the kind used in sachets containing soap powder.
The contributing branches of the left external carotid artery were successfully embolized with polyvinyl alcohol. Blood supply to the tumor after embolization was estimated to have been reduced by at least 60%.
Key words: bacterial cellulose, polyvinyl alcohol, diffusion, tetracycline.
Also said to be compatible with nitrocellulose, cellulose acetate, nylon, certain grades of polyvinyl alcohol, and other natural and synthetic film-forming materials.
In working to improve the dielectric properties of these specialty papers, we focused on the use of a surface size based on polyvinyl alcohol. The PVA was cyanoethylated to increase its dielectric properties.
The new plant will be built within the compound of BP Chemicals Ltd.'s plant in Saltend, northern England, at a cost of $95 million, the leading maker of polyvinyl alcohol said.
Using a tuberculin syringe and needle, a small drop of polyvinyl alcohol (Elvanol; E.I.