Recombination Definition and 53 Threads

I thought that the base recombination current (say in a pnp bjt) was the current caused by the electrons that come up the base wire to compensate the loss of free electrons from the recombination process in the base. But recently I read that this are actually two different currents that sum up...

There are many recombination processes:http://en.wikipedia.org/wiki/Recombination but specifically in cosmology the process deals with the Electron attaching itself around Nuclei to form atomic structure's? Previous to this moment, electrons were spread out at vast distances through space...

Again such a nicely orchistrated technique. Used, for instance, when you’d like to look at a mutation which is lethal to an embryo: you’ll have to induce the mutation later in life in order to actually observe the effects. What to do? Insert a gene that induces mitotic crossing-over and place...