The invention relates to the stem cells, embryonic stem cells in particular. The MP enters a light sleep mode. At the end of said feed line facing away from the converter housing a plug part is disposed. It then merges the background data of a given frame into the scene model. The brushes are urged into constant engagement of the grooves with the protrusions on the commutator to establish electrical contacts between the brushes and the commutator and minimize movement of the armature shaft relative to the bearing. The container also may have upwardly extending fingers in the removable tray for securing a material.