A method and device are disclosed which prevent the intrusion of insects onto wood structures by using a barrier capable of retaining pesticide. The device comprises a liquid crystal layer, at least two electrodes making it possible to excite the liquid crystal, means for generating a control signal for the electrodes, means for generating a high frequency signal applied to the second electrode, means for detecting a modification, if any, of the high frequency signal. The method also includes performing an isotropic etching on the second portion of the opening to obtain a flask-shaped opening and filling the opening with a filling material. The interconnection includes a tap that directs pressure from the interconnection via a tube or conduit to the gauge. More specifically the patent relates to the production of compounds that mimic the antibiotic action of \u03b2-lactams, are resistant to \u03b2-lactamase degradation, and inhibit all classes of \u03b2-lactamase. The administrator is provided with options to control the behavior of the machine when required billing codes are not entered,such as holding image data relating to a requested job in a machine until the required billing codes have been entered.