L16W10_MIC105_FermAcetoSyntroph

L16W10_MIC105_FermAcetoSyntroph - MIC105 Lecture 16 Fill in...

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MIC105 Lecture 16 Fill in the blank Fermentation __________. a) Fever b) Fervor c) Furor d) All of the above Thursday, February 11, 2010
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methanotroph CH4 or methanol methylotroph obligate facultative C1 + organics C1 only methylotroph * Thursday, February 11, 2010
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SciAm articles “Flammable Ice” “The Mystery of Lambic Beer” * Thursday, February 11, 2010
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Carbon cycle Phototrophs (photoautotrophs and photoheterotrophs) Methanogens (H 2 /CO 2 and acetotrophic) lithoautotrophs Methylotrophs (and other C1 metabolism) lithoheterotrophs and lithoautotrophs C1 compounds generally considered inorganic * Thursday, February 11, 2010
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* Thursday, February 11, 2010
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Carbon cycle Aerobic respiration Aerobic/anaerobic degradation of man-made organic compounds (Parales) Anaerobic degradation of carbon Homoacetogens Fermenters Syntrophs (2° fermenters) * Thursday, February 11, 2010
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7 * Thursday, February 11, 2010
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Anaerobic degradation of Carbon polymers monomers fatty acids succinate alcohols lactate acetate CH 4 , CO 2 C1 compounds H 2 * Thursday, February 11, 2010
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anaerobes that reduce CO 2 to acetate with H 2 usually as electron donor 4H 2 + 2CO 2 -> CH 3 COO- + H + + 2H 2 O Acetobacterium woodii acetate formation is via the acetyl CoA pathway (CO dehydrogenase) adaptable - can also live as organoheterotrophs ferment glucose Frst, generating H 2 and CO 2 Homoacetogens * Thursday, February 11, 2010
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Methanogens: 4H 2 + CO 2 -> CH 4 + 2H 2 O Δ G°’= -131 kJ/mole Homoacetogens: 4H 2 + 2CO 2 -> CH 3 COO- + H + + 2H 2 O Δ G°’= -95 kJ/mole * Thursday, February 11, 2010
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* acetogens can compete as often lower pH acetogens often also live as chemoorganotrophs Thursday, February 11, 2010
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THF=C1 carrier * Thursday, February 11, 2010
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Some aspects of the carbon cycle you might Fnd more interesting… Thursday, February 11, 2010
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Thursday, February 11, 2010
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Before Pasteur. .lambic only beer that could be preserved for years Lambic beer (wild fermentation) Thursday, February 11, 2010
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Respiration vs. Fermentation Aerobic respiration: O 2 is terminal electron acceptor Anaerobic respiration:
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L16W10_MIC105_FermAcetoSyntroph - MIC105 Lecture 16 Fill in...

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