A substrate, such as a printed circuit board, has pairs of pads to which terminals of electronic components, such as capacitors, can be mounted. A silicon compound represented by formula is obtained through the production process characterized by using a silicon compound represented by formula. The beads can then be washed and used or further processed to crosslink the agarose andor add various functionalities on to the agarose. Operator system is set up in the context of basic axioms of a particular field of application, which direct to an extent what the operators do.