As
a continuation...
Two weeks later changes have not been significant to the column without light: we can see a homogeneous dark gray colour in all of the column except for the top, where the colour is brownish with a fine red line.
Two weeks later changes have not been significant to the column without light: we can see a homogeneous dark gray colour in all of the column except for the top, where the colour is brownish with a fine red line.
Maybe that's because the top of the bottle contains a
lot of population of different types of bacterium, all of them are aerobic and
live in aquatic habitats rich in organic matter. However, it is also certain
that the amounts of H2S from the mud oxidized to SO4 by bacterias (geneus Beggiatoa) that oxidize
S to produce energy, that's is the red line (look the point of the pen).
Black colour is produced by sulfur-reducing bacterium, these bacterium degrade cellulose of paper to glucose and fermented the glucose to produce simple organic compounds, used for anaerobic respiration, spend sulphate and generate large amounts of hydrogen sulphide. Hydrogen sulphide reacts with any ferric compound present in the sediment, producing iron (II) sulphide, which produces the colour black. Also, methange generating bacterium appear and produces gas bubbles in the Winodgrasky colum.
See you soon!! ☺☺☺
Inmaculada Lopez, Hanael Maciá y Angel Soto.
Black colour is produced by sulfur-reducing bacterium, these bacterium degrade cellulose of paper to glucose and fermented the glucose to produce simple organic compounds, used for anaerobic respiration, spend sulphate and generate large amounts of hydrogen sulphide. Hydrogen sulphide reacts with any ferric compound present in the sediment, producing iron (II) sulphide, which produces the colour black. Also, methange generating bacterium appear and produces gas bubbles in the Winodgrasky colum.
See you soon!! ☺☺☺
Inmaculada Lopez, Hanael Maciá y Angel Soto.
Beggiatoa and other sulfide oxidising bacteria are typically white in colour (due to the accumulation of elemental sulfur granules intracellularly), not red. Some other bacteria are responsible for the red colour. Which?
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