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.
Methylphenidate, sold under various trade names, Ritalin being one of the most commonly known, is a central nervous system stimulant of the phenethylamine and piperidine classes that is used in the treatment of attention deficit hyperactivity disorder and narcolepsy. The original patent was owned by CIBA, now Novartis Corporation. It was first licensed by the US Food and Drug Administration in 1955 for treating what was then known as hyperactivity. Medical use began in 1960; the drug has become