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
Ritalin. (Methyphenidate, Concerta, Metadate, Methylin). Although Ritalin is widely categorized as a stimulant drug and does contain an amphetamine-like backbone, however it is a much more complex structure. It is technically in a class of drugs called Norephinephrine Dopamine Reuptake Inhibitors or NDRIs.