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ISBN-10: 3134446081

ISBN-13: 9783134446081

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Dieser in anoxischen Sedimenten von Gewässern entstehende Schwefelwasserstoff kann durch anaerobe phototrophe Bakterien wieder zu Schwefel und Sulfat oxidiert werden. Gelangt der Schwefelwasserstoff in sauerstoffhaltige Zonen, so wird er entweder abiotisch oder durch aerobe Schwefelbakterien zu Sulfat oxidiert. Den zur Synthese schwefelhaltiger Aminosäuren notwendigen Schwefelwasserstoff gewinnen die Pflanzen und Mikroorganismen durch assimilatorische Sulfatreduktion. Die Tiere sind auf die Aufnahme reduzierter Schwefelverbindungen mit der Nahrung angewiesen.

Auch Ammoniumionen werden dabei zu Nitrat oxidiert. Unter Sauerstoffmangel entwickeln sich Bakterien, die ohne Sauerstoff von den noch verbliebenen geringen Mengen an organischen Stoffen leben; sie reduzieren dabei das Nitrat zu gasförmigem N2. Die Bakterienmasse und andere unlösliche organische Stoffe werden in einen Faulturm gepumpt und dort langsam durch anaerobe Bakteriengemeinschaften zu Biogas (CO2 und CH4) umgesetzt. Das Methan kann verbrannt werden und liefert die Energie für den Betrieb der Anlage.

Milstein Monoklonale Antikörper 1977 C. Woese, G. Fox Archaea, natürlicher Stammbaum 1977 F. Sanger, S. Niklen, A. Coulson Methoden der DNA-Sequenzierung 1982 K. Stetter Extrem thermophile Bakterien 1983 L. Montagnier HIV (der Erreger von AIDS) 1988 K. Mullis Polymerasekettenreaktion (PCR) 1995 C. Venter, H. Smith Vollständige Sequenz eines bakteriellen Genoms Aus Fuchs, G. : Allgemeine Mikrobiologie (ISBN 978-313-444608-1) © Georg Thieme Verlag KG 2007 Dieses Dokument ist nur für den persönlichen Gebrauch bestimmt und darf in keiner Form an Dritte weitergegeben werden!

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Allgemeine Mikrobiologie

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