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
Among the less serious side effects associated with Focalin usage are nausea, stomachache, headache, nervousness, loss of appetite and weight loss. Ritalin Basics Ritalin, or methylphenidate, is often used to treat attention disorders such as ADHD and is a mild nervous system stimulant.