Parvovirus B19, which causes fifth disease in humans, is a member of the Erythrovirus genus of the Parvoviridae. Prior to 2014, it was also the name applied to a genus within the subfamily Parvovirinae, but this has been amended to genus Protoparvovirus to avoid confusion between taxonomic levels.
PVC redirects here. For other uses, see PVC (disambiguation). Polyvinyl chloride (/ËpÉlivaÉªnÉl ËklÉÉraÉªd/), more correctly but unusually poly(vinyl chloride), commonly abbreviated PVC, is the world's third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene. PVC comes in two basic forms: rigid (sometimes abbreviated as RPVC) and flexible.
These chemicals, as well as styrene, are called monomers. The Monomers are chemically bonded into chains called polymers. The properties and characteristics of these polymers vary greatly. Below are the different types of plastics with their properties and common uses. Polypropylene has relatively poor impact strength, but excellent compatibility with weak and concentrated acids, bases and alcohol.* Polypropylene is commonly used to make bottles, vials, pumps, funnels and clothing.