This volume summarizes the current knowledge on the exchange of trace gases between forests and the atmosphere with the restriction that exclusively carbon and nitrogen compounds are included. For this purpose the volume brings together and interconnects knowledge from different disciplines of biological and atmospheric sciences. It covers microbial and plant processes involved in the production and consumption of these trace gases; the exchange processes between forest soils and vegetation on the one hand, and the atmosphere on the other hand; the fate of the trace gases exchanged inside the...

Grau. teurer Freund. ist aUe Theorie Und griln des Lebens goldner Baum All theory. dear friend. 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. Evidence is available that intercellular channels are essential for electrical synchronization in excitable tissues and for the diffusion of molecules from cell to cell. This process of cell-to-cell communication is so reliable that it was...