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
A: Brand name Ritalin (methylphenidate) is manufactured by Novartis Pharmaceuticals Corporation. Ritalin is a stimulant medication that affects the central nervous system. It is used to treat attention deficit hyperactivity disorder (ADHD), attention deficit disorder (ADD), and narcolepsy.Ritalin helps to increase attention and control symptoms such as hyperactivity and impulsiveness.he Food and Drug Administration (FDA) first licensed methylphenidate hydrochloride in 1955 for treating what was formerly known as hyperactivity, attention-deficit disorder or ADD. The drug was commonly prescribed in the 1990s when the diagnosis of ADHD became better known and accepted.