The invention relates to a method for evaporating a solution and an evaporator applied to it. The radio frequency excited slab waveguide laser having a radio frequency generator, an unstable resonator and a lock-in stabilizer further includes the detection circuit for detecting a current signal due to the optogalvanic effect generated from the unstable resonator itself to allow a signal detected by the detection circuit to be fed back to the lock-in stabilizer. The molecular precursor includes a surface binding group for attachment to the substrate and a binding group for attachment of metal-containing species. Coded symbols are derived from the corresponding integers. The invention also relates to methods for identifying further molecules that suppress or enhance bitter taste transduction or bitter taste response mediated by hTAS2R40, hTAS2R43, hTAS2R44, hTAS2R46, andor hTAS2R47 and uses thereof. The method includes identifying a plurality of peer level chairperson positions for the electronic event and identifying at least one chairperson corresponding to each of the of peer level chairperson positions.