For #5 we really like the "circuit" concept - however, we are concerned that when the logo's size is reduced the "holes" wont be visible - could the circuit board hole be made more prominent? We also think the coloring is a little light - we did like the coloring in #2.
We like #10 - but not the "atom" in the center. Could this be replaced with some else?
#1 - we dont like test tubes.