Recent analyses of Apollo samples have demonstrated that a core dynamo existed on the Moon between at least 4.25 and 3.56 billion years ago (Ga) with surface field intensities reaching ∼70 μT. However, it is
The EU has signed several agreements relevant to the wine trade (e.g. with South Korea, Singapore and Canada) and a number of negotiations are currently in progress. However, some of the EU's main competitors, in particular Chile, Australia and New Zealand, are very active as well. EU ...
is inserted into a groove of [1H]+, a second aromatic ring being placed astride the outside i+ pocket. Solvent polarity controls the thermodynamics of inversion of the [1H]+ propeller. However, both polarity and basicity control its kinetics. Therefore, the rate-limiting steps correspond to ...