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9 August, 17:25

Where does carbon come from in a winogradsky column? 2. why is carbon important? 3. what purpose does calcium sulfate serve in the winogradsky column? 4. why is a hydrogen sulfide gradient generated from bottom to top in a winogradsky column? 5. how is photosynthesis different between cyanobacteria (growing at the top of the column) and green and purple sulfur bacteria (growing near the bottom 1/3 of the column) ?

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  1. 9 August, 19:24
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    Carbon comes from blackened marshmallow or egg-shells, newspapers which contain cellulose, and sulphur source, for example, calcium sulphate in winogradsky column.

    Carbon is important because it promotes the growth of different microorganisms. For example chlorobium, chromatium, rhodomicrobium, and Beggiatoa.

    Hydrogen sulphide gradient is generated from bottom to the top in a winogradsky column because they dominate the zone with sulphur which reduces bacteria.

    Photosynthesis is different between cyanobacteria and green and purple sulphur which is sulphur anaerobic bacteria being the top layer of aerobic bacteria which produces carbon dioxide which feeds back into the column by creating another reaction.
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