The present invention concerns particles containing at least one covalently cross-linked polysaccharide and at least one growth factor, a method of preparation, and uses thereof. Further, an apparatus for giving reducing properties is large in scale, and there is an adverse possibility that the apparatus adversely affects other electronic equipment. The utilization of these resources by the one or more jobs complements utilization of these resources by the one or more other jobs. A hotel room key token is transferred from the reservationIT system to the wireless device of the mobile terminal, and hence to the wireless door lock. The backplane may comprise spacers in the first region andor glue lane.