Hydrogen biology

An organotroph is an organism that obtains hydrogen or electrons from organic substrates. This term is used in microbiology to classify and describe organisms based on how they obtain electrons for their respiration processes. Some organotrophs such as animals and many bacteria, are also heterotrophs. Organotrophs can be either anaerobic or aerobic.

bio-electrochemical system that drives a current by mimicking bacterial interactions

thumb|Microbial hydrogen production. Biohydrogen is H2 that is produced biologically. Interest is high in this technology because H2 is a clean fuel and can be readily produced from certain kinds of biomass, including biological waste. Furthermore some photosynthetic microorganisms are capable of producing H2 directly from water splitting using light as energy source.

Acetogenesis is a process through which acetyl-CoA or acetic acid is produced by anaerobic bacteria through the reduction of Carbon dioxide| via the Wood–Ljungdahl pathway. Other microbial processes that produce acetic acid (like certain types of fermentation or the oxidative breakdown of carbohydrates or ethanol by acetic acid bacteria) are not considered acetogenesis. The diverse bacterial species capable of acetogenesis are collectively called acetogens.

technics

class of transport proteins

hydrogen exchange between the living and non-living world

thumb|Serine dehydratase is an example of a dehydratase. It utilizes PLP as a cofactor. Dehydratases are a group of lyase enzymes that form double and triple bonds in a substrate through the removal of water. They can be found in many places including the mitochondria, peroxisome and cytosol. There are more than 150 different dehydratase enzymes that are classified into four groups. Dehydratases can act on hydroxyacyl-CoA with or without cofactors, and some have a metal and non-metal cluster act as their active site.

conversion of organic substrate to biohydrogen

organisms which "breathe" sulfur