In the first decade of the 20th century, Einstein produced the theory of the conversion of mass into energy, E=mC(2), which was confirmed by laboratory observations. A new theory of the atom was devised by the English physicist Rutherford in 1913.
Methylphenidate, Methylin. Generic Ritalin. Methylphenidate (methylin) is a moderately priced drug used to treat attention-deficit hyperactivity disorder (ADHD). It is also used to treat narcolepsy. This drug is slightly more popular than comparable drugs. It is available in brand and generic versions.
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.