Microbial metabolism http://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism http://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism Microbial metabolism http://en.wikipedia.org/wiki/Microbial_metabolism http://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism http://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism http://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism Microbial metabolism metabolic Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism metabolic metabolic Microbial metabolism Microbial metabolism Microbial metabolism microbial metabolism sulfur oxidation many types of anaerobic metabolism possible Microbial metabolism Microbial metabolism Microbial metabolism hydrogen as the electron donor Microbial metabolism https://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism hydrogen oxidation Microbial metabolism microbes are known to utilize this chemolithoautotrophic ammonia-oxidizers nitrogen http://en.wikipedia.org/wiki/Microbial_metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism microbial metabolism nitrogen Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial metabolism Microbial physiology and metabolism