Methods of suppressing the activation of microglial cells in the Central Nervous System, methods of ameliorating or treating the neurological effects of cerebral ischemia or cerebral inflammation, and methods of combating specific diseases that affect the CNS by administering a compound that binds to microglial receptors and prevents or reduces microglial activation are described. The products comprise trimers obtained by fractionating a hydrogenated bottoms product from an oligomerization process using said promoter system. The control unit comprises calculation means for calculation of the visual information to be displayed from at least one current base image, under inclusion of current image change parameters and of the current position of the first screen. The portions of the coded video data are reordered into their original order in an output buffer after being decoded. Dirty water in the receptacle may be transferred via tilting motion using handle out of the receptacle and into the second chamber through a spout. In the method, the operator pre-selects manually, for example on the basis of an image visible on a display screen, a grey scale level of hisher desire, the values consistent therewith being stored in a memory associated with a display device.