A test cell for analyzing residue on the surface of a microelectronic component includes a cleaning tip with an opening at one end for passing cleaning fluid into the chamber and for passing used cleaning fluid out of the chamber, and an opening at the other end to access a test area in which cleaning fluid may contact the surface of a component to be tested. More particularly, the present invention relates to novel \u03b2-aryl-\u03b1-oxysubstituted alkylcarboxylic acids of the general formula ,their derivatives, their analogs, their tautomeric forms, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceutically acceptable compositions containing them. 000 during the polymerization process, according to the present invention surfactants, which were deemed necessary coating material in the prior art, are no longer required. When a surge voltage is applied between the program power supply and the grounding, the foregoing structure allows a part of a surge electric current can flow through the program protective circuit. In driving a plasma display panel by applying an increasing voltage to cells of a display screen during a reset period for equalizing charge of the cells, an increasing voltage signal is supplied to an impedance conversion circuit in which an output impedance is lower than an input impedance, and the output signal of the impedance conversion circuit is supplied to the cells.