Process for production of non-protenogenic L-amino acids by direct fermentation of a microorganism strain known per se having a deregulated cysteine metabolism in a manner known per se, which comprises adding, during the fermentation, a nucleophilic compound to the fermentation batch in a manner such that this leads to the production of non-proteinogenic L-amino acids by the microorganism strain. Roughly speaking, the module of a processor x maintains a heartbeat counter for every other process. A difference between the actual and expected values for refrigerant pressures and temperature outside a desired range provides indication of a fault in the system. The first index offset is signaled via the PDCCH and the second index offset is signaled via higher layer signaling. The central system may then use the historical record of anonymized user profile data to respond to historical requests. The color-revitalizing composition, which has a color determined by the color of the oxidative hair dye composition and contains at least one direct dye, revitalizes the color tone originally obtained by after dyeing with the oxidative hair dye composition.