Abstract: The invention relates to a photo sensitive electronic component based on amorphous silicon and its alloys, comprising two, in respect to each other antiserially arranged, p-i-n or n-i-p or Schottky-contact structures, in which in each case the active layers are arranged in the normal way in the direction of light incidence, whereby in the area of the first structure in the direction of light incidence, the charge carriers generated by blue light are collected for a first (V1) voltage; and in the area of the second structure in the direction of light incidence, the charge carriers generated by red or green light are collected for a second (V2) or a third (V3) voltage, and whereby at least one of the two intrinsically conducting layers is constructed from two partial layers. The object of creating better spectral selectivity is achieved in that in the partial layer (I) which is in front in the direction of light incidence, a higher product from charge carrier mobility and life-time (.mu.

Abstract: The invention comprises a process for regenerating and detoxifying electrolytes which contain sodium nitrate for use in electrochemical treatment of metallic workpieces. The reaction products, like ammonia, formed in the treatment which interfere with the operating process and in some instances are toxic shall be removed as harmless substances.The process according to the invention is characterized by(a) adjusting the electrolyte to a pH value within the range from 4 to 5 and oxidizing the nitrite with hydrogen peroxide to the nitrate or reducing the nitrite with urea to nitrogen.(b) raising the pH value to 11 to 12, precipitating the metal hydroxides and stripping the ammonia by passing air into the electrolyte,(c) precipitating the heavy metal hydrolisates by sedimentation, filtration and/or centrifugation,(d) neutralizing the electrolyte to a pH of 8 to 8.5.