MICR 4280 Lecture Notes - Lecture 23: Electrochemical Gradient, Anammox, Biogeochemical Cycle
19 Mar 2019
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Monday march 18 t h lecture 23. Planctomycete kuenenia stuttgarteinsis has two internal membranes and oxidizes ammonia anaerobically: aquatic and terrestrial species vs ca. The marine carbon cy cle and the biologic al carbon pump. Lifeforms that are photosynthetic that we never knew about until now. In the anoxic zone: methanogenesis: fish poop and pom can be degraded to organic monomers. Fermentation: catabolic breakdown by primary fermenters: produce h2 and co2. These compounds broken down by secondary fermenters (syntrophy secondary fermentation reaction is endergonic: complete oxidation to co2 via dissimilatory reductions (sulfate + nitrate most available, or incomplete oxidation via fermentation. Fermentation, methan ogenesis, and syntro phy: adaptions to be ing a thermodynamic. Extremophile: overcoming the problem of endergonic catabolic reactions, endergonic: change in free energy = positive: the reaction does not liberate energy (+delta g) For secondary fermentations: delta g is positive vs. primary fermentation which is very negative delta g (exergonic)
