A system includes a gas turbine engine that includes a first combustor and a second combustor. A proximal end portion of the sampler includes a handle having a bearing surface which tapers in a direction away from the handle. The curved cantilever beam is adapted to flex in response to an activation voltage applied between the actuator electrode and the curved cantilever beam to provide an electrical contact between the curved cantilever beam and an output electrode of the nano-electromechanical switch. A divergence value based on a distance between the first and second histograms is then calculated and it is determined if the calculated divergence value is greater than a predetermined threshold. The peptide serves as a marker for diagnostically detecting inflammatory andor excitation-inhibitory processes and diseases of the nervous system and as a basis for pharmaceutical compositions for treating diseases of the nervous system or for pharmaceutical compositions having an anaesthetic effect. A polymer-surfactant complex precipitate is formed as the ratio approaches 1:1.