An intermediation apparatus is designed to interconnect at least one service provider and at least one user by using a non-Internet channel. An electrode is operatively disposed in the first channels and a counter-electrode is operatively disposed in the second channels. The authentication apparatus includes an authentication unit configured to search records of identification information associated with the group information to find matching identification information matching the obtained identification information of the user. The method further can include performing a timing analysis upon, at least part of, the circuit design using the software representation. Those undesirable substances which do not diffuse out of the blood or plasma into the hepatocyte containing culture medium are captured by additional removal means. The bed knife also has a second knife edge, the said knife edges being arranged at a distance from each other in the direction of movement of the chipper disc knives.