On top of one of them is a diode as the active medium.

This is one of many possible ways in which a molecular level diode transistor might be synthesized by organic chemistry.

It is called so because the logic gating function (e.g., AND) is performed by a diode network and the amplifying function is performed by a transistor (in contrast with RTL and TTL).

Putin s Russia is not Yeltsin s Russia, when the West could simply shunt aside Russian concerns. Europe is vulnerable on many fronts, particularly in view of its dependence on Russian energy, while America s weakened presidency has diminished US influence in Russia.