ABSTRACT
Annular jet processes are used, when regular drop generation does not lead to a satisfactory result of the nal properties of a particle. A normal particle, generated by a classical process using any jet, for example, atomization, vibrational drip casting, spinning disk, etc., consists of a more or less homogeneous mixture or a single material. The release properties of such particles are typically driven by a diffusion controlled process or by degradation. As, in case of an embedded active, the active is distributed over the total volume of the particle, it is partly unprotected. So, such actives at the outer parts of the particle can and will be subject to evaporation, oxidization, or degradation. In the best case, this means a loss of active. In the works, the nal product is gone bad and has to be discarded-just think of a fruit yoghurt highly enriched with Ω3-acid that smells strongly of rancid sh.
