'Flakka': How dangerous is the new street drug? A designer street drug called 'Flakka' is making headlines again with a new incident involving four people going on a rampage in Sullivan, Missouri. What is Flakka and just how dangerous is it?
Voltage clamp. The voltage clamp is an experimental method used by electrophysiologists to measure the ion currents through the membranes of excitable cells, such as neurons, while holding the membrane voltage at a set level.
Pressure Regulators in Operation. A pressure regulator is comprised of three functional elements. ) 1  A pressure reducing or restrictive element. Often this is a spring loaded poppet valve. ) 2  A sensing element. Typically a diaphragm or piston. )  A reference force element.