University of Thessaly, Group number: 18, Day number: 18 - 47, Incubation: Dark

Greetings to everyone!!!

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With this post we will present the new observations from our Winogradsky column experiment...

07-04-2016 (18th day)

After one week from the last observation...

More carefully...

The brown colour of the sediment has changed into black. Still, we can recognize some pieces of the newspaper that have been used for the experiment.The texture seems now to be finer.

The water turbidity has over increased.

At the surface, the white layer is more obvious and some "green spots'' have started to appear and sprawl all over the layer.

Also, at the surface, a white crust has been created. The crust seems to come apart where the ''green spots''exist. The phenomenon of bubbling is not so intense as it was before.


22-04-2016 (33rd day)

After two weeks from the last observation...

More carefully...

The picture above shows that the water level has increased as the water from the experiment started to pour of the bottle.

The sediment of the experiment is now black and has completely homogenized. All the ingredients have dissolved. Also, its texture changed. It is now finer.

The water, between the white crust of the surface and the sediment, is more turbid.

The ''green spots'' under the white crust started to increase and they sprawl in the water of the bottle and particularly into the white layer.

After eight days from the last observation, at the surface of the bottle, the white crust has covered the entire surface, even the ''green spots''.


06-05-2016 (47th day)

After two weeks from the last observation...

As we can observe, no change has been detected since the last observation...