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.
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 is in a class of medications called central nervous system stimulants (CNS stimulants).t is used to treat attention deficit hyperactivity disorder (ADHD), attention deficit disorder (ADD), and narcolepsy. Ritalin helps to increase attention and control symptoms such as hyperactivity and impulsiveness.