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.
Focalin XR contains dexmethylphenidate, which is very similar to methylphenidate (the active component of Concerta Â® , Daytrana Â® , Ritalin Â® , Metadate Â® , and Methylin Â®). In fact, methylphenidate is actually a mixture of dexmethylphenidate and levomethylphenidate.ocalin XR capsules are specially designed to release half of the medication immediately, and to release the second half of the medication after approximately four hours. As a result, the medication can be taken just once a day.