Never seen this. But I am EU, such kitchen hightek is fairly unknown here.
Anyways this is the answer:
http://www.yale.edu/ynhti/curriculum/units/1989/7/89.07.04.x.html (http://www.yale.edu/ynhti/curriculum/units/1989/7/89.07.04.x.html)
on another question, but who realy minds.