The present invention is directed to methods for assaying a test compound’s ability to alter the expression of novel receptor for galanin which has been designated as galanin receptor 2. The disclosed process is simple, allows selective preparation of 4,4\u2032-DNDPA without byproducts, and thus allows preparation of 4,4\u2032-BAADA in high yield without a complicated purification procedure. The bumper assembly comprises: a bumper core. If the receiver detects no misinterpretation error, the second field is simply left blank. The measuring system provides thickness andor uniformity related data to a processor that determines the thickness andor uniformity of the respective oxide andor nitride layers on the wafer. The vibration and modulation system includes an air source, a high-pressure reservoir in fluid communication with the air source, and at least one valve coupled between the high-pressure air source and the array of air cells.