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
Marketed under numerous brand names, the best known of which is Ritalin, methylphenidate and other amphetamines function as central nervous system (CNS) stimulants, and have been FDA approved for the treatment of both childhood and adult attention deficit hyperactivity disorder (ADHD) as well as narcolepsy in adults.lthough it is not known exactly how Ritalin works, it is believed to increase the flow of the neurotransmitters dopamine and norepinephrine, chemicals that carry the signal between neurons (cells of the nervous system).