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Isolation, Purification and Structure Elucidation of New Secondary Metabolites from Terrestrial, Marine, and Ruminal Microorganisms

Isolation, Purification and Structure Elucidation of New Secondary Metabolites from Terrestrial, Marine, and Ruminal Microorganisms

by Imene Zendah
Doctoral thesis
Date of Examination:2012-07-13
Date of issue:2012-12-19
Advisor:Prof. Dr. Hartmut Laatsch
Referee:Prof. Dr. Hartmut Laatsch
Referee:Prof. Dr. Aly Raise
Referee:Prof. Dr. Axel Zeeck
crossref-logoPersistent Address: http://dx.doi.org/10.53846/goediss-2184

 

 

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Abstract

English

The search for microorganisms useful in agriculture, agroalimentary and pharmaceu-tical industries requires the exploration also of ecological niches. Thus, within this background, the rumen (one of the four stomach parts of ruminals like the cow), is such an ecological niche, which is very rich in microorganisms and could be exploited in order to check the antagonistic capacity of the ruminal bacteria against pathogenic bacteria and fungi. This work thus fits in the biological fight in agriculture against the cryptogamic dis-eases. Indeed, the use of microorganisms to fight against phytopathogenic fungi is much better for the environment and the human health than the use of pesticides. It avoids the pollution of the ground, water and food. It also fits in the fight against the multiresistant bacteria and fungi. Sixteen bacteria (seven ruminal, six terrestrial, two marine and one from hospital area) and two fungi were selected and subjected to culture in large scale. The working up and isolation of their metabolic constituents were described.
Keywords: cryptogamic dis-eases; ruminal; phenazine; Pseudomonas aeruginosa; Citrobacter freundii

Other Languages

Diese Arbeit passt somit in der biologischen Bekämpfung in der Landwirtschaft gegen die Kryptogamen Krankheiten. Tatsächlich ist die Verwendung von Mikroorganismen, um gegen phytopathogene Pilze zu bekämpfen viel besser für die Umwelt und die Gesundheit des Menschen ist als der Einsatz von Pestiziden. Es vermeidet die Verschmutzung von Boden, Wasser und Nahrung. Es passt auch in den Kampf gegen die multiresistenten Bakterien und Pilze. Sechzehn Bakterien (sieben ruminale, sechs terrestrisch, zwei Marine- und ein aus dem Krankenhaus-Bereich) und zwei Pilze wurden ausgewählt und züchten den Kulturen in großem Maßstab. Die Aufarbeitung und Isolierung ihrer metabolischen Bestandteile wurden beschrieben.
Schlagwörter: Kryptogamen Krankheiten; ruminale; Phenazin; Pseudomonas aeruginosa; Citrobacter freundii
 

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