Based on the mechanism of heat generation at the welding interface, welding methods for thermoplastics can be classified as external and internal heating methods, as shown in Fig 1. Fig. 1. Classification of welding methods for semi-finished polymeric materials.
ritalin is the brand name of the drug methylphenidate hydrochloride doctors prescribe ritalin to treat attention deficit hyperactivity disorder adhd and a sleep disorder known as narcolepsy
Is Ritalin Effective for Adult ADHD? Methylphenidate was the first drug to be used in the treatment of ADHD, originally to treat children in the 1960âs. Since its discovery, methylphenidate has been used to treat ADHD in both children and adults for many years.