Titlebook: Rhizosph?renprozesse, Umweltstre? und ?kosystemstabilit?t; 7. Borkheider Semina Wolfgang Merbach (Leiter des Instituts für Rhizosp Book 199

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Einfluss von Emissionsbelastungen in Wald?kosystemen auf die Entwicklung des Feinwurzelsystems von ,ment in the humus layer and a relatively constant length density of fine roots down to a depth of 55 cm. Differences in soil chemical soil properties, especially in the N saturation of the ecosystems, originating from the different pollution levels, were identified as a cause of the different development of fine root systems.

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Untersuchungen zum Schadstofftransfer Ausgew?hlter Organochlorpestizide und Polyzyklischer Aromatiscis effect is due to growth dilution. Increasing concentrations of lindane (γ-HCH) and methoxychlor in soil lead to an increase of their concentrations in maize, whereas benzo(a)pyrene and fluoranthene showed no directly effect.

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On the State Reachability Problem for Concurrent Programs Under PowerWe consider the problem of safety verification, formalized as control-state reachability, for concurrent programs running on the Power architecture. Our main result shows that safety verification under Power is undecidable for programs with just two threads.