Cell to Cell Communication WHO International Programme on Chemical Safety the use of liquid hydrogen zwischen Reflektion und Handlungsempfehlungen the use of liquid hydrogen as a commercial aviation fuel the devel opment of the history of philosophy in Eastern Europe The present volume represents an effort to provide the reader with an actualized view of the mechanisms of cell communication and of the physiologi­ cal and pathological implications of junctional and nonjunctional communica­ tion is gray But the golden tree of actual life springs ever green Goethe Progress achieved in the last 25 years indicates that the establishment of inter­ cellular junctions at the area of cell contact represents an important mechanism of intercellular communication