Abstract: Known processes for the production of nanoparticles of compounds of the transition metals Zr, Ti, Ta, rare earths (RE), Mn, and Fe via microemulsions lead to products that contain impurities from the reactants, particularly water, which make the further use of said nanoparticles difficult, for instance in high-temperature super conductors (HTSC). It is proposed that the nanoparticles be produced via anhydrous microemulsions having an outer phase composed of a nonpolar solvent and inner phase composed of a polar anhydrous solvent. The nanoparticles thus obtained exhibit good monodispersity and can be used in the production of REBa2Cu3O7 super conductors by incorporation into the precursor coating solution.

Abstract: Known processes for the production of nanoparticles of compounds of the transition metals Zr, Ti, Ta, rare earths (RE), Mn, and Fe via microemulsions lead to products that contain impurities from the reactants, particularly water, which make the further use of said nanoparticles difficult, for instance in high-temperature super conductors (HTSC). It is proposed that the nanoparticles be produced via anhydrous microemulsions having an outer phase composed of a nonpolar solvent and inner phase composed of a polar anhydrous solvent. The nanoparticles thus obtained exhibit good monodispersity and can be used in the production of REBa2Cu3O7 super conductors by incorporation into the precursor coating solution.

Abstract: A method for visual characterization of human or animal tissue formed from cells, having the following steps: a radiation source for emitting directional electromagnetic radiation is provided; —the tissue to be irradiated with the radiation, this producing a reflection in the tissue which is characteristic of the tissue, with—the radiation which has penetrated the tissue having, within an excitation region extending transversely with respect to the direction of propagation of the radiation, a sufficient intensity to excite a reflection in the tissue. The radiation emitted by the radiation source is impressed with an intensity profile, transversely with respect to its direction of propagation, which is such that the excitation region covers a plurality of cells of the tissue and the excited reflection originates from inter-cell tissue properties.