Abstract: A control element, in particular a piezoelectrically operated fuel injection valve in an internal combustion engine, is charged, in order to compensate for stochastic reactions in the internal combustion engine, with a constant nominal voltage applied to a series circuit that includes a charge capacitor and a charge reversal capacitor, and it is discharged into the charge reversal capacitor to a prescribed voltage value. The remaining residual charge of the control element is charged into the charge capacitor via a limiter path.

Abstract: The invention relates to a process for producing a shaped body, in which a mixture of oxidic starting powders or a superconducting material, which comprises at least 30% by volume of platelet-shaped primary particles and has such a composition that a high-temperature superconducting material is formed on later, suitable thermal treatment, is comminuted by milling, shearing and/or rolling in such a way that the comminuted powder has a powder particle size distribution having a d90 of ≦20 &mgr;m, and in which the powders which have been comminuted in this way are isostatically compacted by the dry bag method.

Abstract: Marked mineral oils containing basic dyes which have at least two, optionally substituted, amino groups and which, on addition of a protogenic acid and, optionally, a metal halide, experience a bathochromic shift of their absorption maximum and an increase in absorbance, and a method of marking mineral oils with basic dyes.

Abstract: Monoazo and disazo dyes having an unsubstituted or substituted aniline or p-aminoazobenzene as diazo component and an N-substituted .beta.-naphthylamine of six to eighteen carbon atoms in the N-substituent as coupling component. Preferred diazo components are phenyl, tolyl, phenylazophenyl and tolylazotolyl, and preferred coupling components are provided by .beta.-naphthylamine which is N-monosubstituted by n-hexyl, n-octyl, .beta.-ethylhexyl, 3,5,5-trimethylhexyl, tridecyl, .beta.-ethylhexoxypropyl, cyclohexyl, benzyl or phenylethyl. The dyes are eminently suitable for the coloring of for example mineral oils, gasoline, fats and waxes because of their excellent solubilities.

Abstract: Concentrated, storage-stable solutions of alkylbenzenesulfonates, with alkyl chains of 8 to 18 carbon atoms, of basic dyes, in normally liquid alcohols, glycols and glycol ethers. The solutions are particularly suitable for producing waterfast prints, colorations, script and markings.

Abstract: Isotridecylammonium salts of chromium or cobalt 1:2 complex azo dyes, their production and their use as colorants for printing inks and surface coatings. The salts are distinguished by particularly good solubility in organic solvents.