Winogradsky column lab page!

Welcome to the Winogradsky column lab page! Students from the Departments of Biological Applications and Technology, University of Ioannina and Icthyology and Aquatic Environment, University of Thessaly, Greece and the Microbiology course, Faculty of Sciences, University of Cádiz, Spain, discuss their findings on Winogradsky columns they constructed!

If you want to add a post, please feel free to contact the blog administrators (Hera Karayanni, Sokratis Papaspyrou or Kostas Kormas)!

Καλωσορίσατε στη σελίδα των Winobloggers! Διαδικτυακός τόπος συνάντησης φοιτητών, φοιτητριών και διδασκόντων δύο Τμημάτων από την Ελλάδα: Tμήμα Βιολογικών Εφαρμογών και Τεχνολογιών, Παν/μιο Ιωαννίνων και Τμήμα Γεωπονίας, Ιχθυολογίας και Υδάτινου Περιβάλλοντος, Παν/μιο Θεσσαλίας και ενός από την Ισπανία: Σχολή Θετικών Επιστημών, Πανεπιστήμιο του Cadiz. Παρακολουθούμε, σχολιάζουμε, ρωτάμε, απαντάμε σχετικά με τα πειράματά μας, τις στήλες Winogradsky!

Bienvenidos a la pagina web de los Winobloggers! Aquí los estudiantes y profesores de dos departamentos griegos, el Departamento de Aplicaciones y Tecnologías Biológicas de la Universidad de Ioannina y el Departmento de Agricultura, Ictiología y Sistemas Acuáticos de la Universidad de Thessalia, junto con los estudiantes de Microbiología de la Facultad de Ciencias en la Universidad de Cádiz, se reúnen para observar, comentar, preguntar y responder a preguntas relacionadas con nuestro experimento, la columna Winogradsky.

Winogradksy columns

Winogradksy columns
'In the field of observation, chance only favors the prepared mind' Pasteur 1854

Blog posts

Thursday, 12 May 2016

UCA_A7-A4_4: Day 63 - How much life!

Rio San Pedro sediment + 30g NaCl + filter paper+ 1.51g CuSO4
In the column that is on the dark side we can appreciate that has been produced more oxide, because it is more orange. We have investigated and we have found that this is sulphur oxide, which has been produced by dependent sulphur bacterium (Rhodospirillum). This bacterium oxidizes SH2 and produces that oxide which goes down for the column.
We also see that the strange black thing has increased his amount. We believe that it may be some type of oxide or even a fungus.
The rest of the column has not change.
In column that is on the light side, we see that on the surface there are more seaweeds which produce more turbidity.  We also observed that the sea snail is alive.

We can appreciate that around the column there are more cracks, and we think it is because the gases produced by the microorganisms. On the face of the dark, we see more iron sulphide on the bottom.

Column on the dark.
Light side of the column on the light.
Darka side of the column on the dark.
Both columns.

1 comment:

  1. You are right, the cracks on the side a re from the gases produced by microorganisms. What type of gases?

    The orange colour you see in the dark column are not from Rhodospirillum. This bacteria needs light (is a phototroph, Rhodo-from the bacteriochlorophyll pigments it has) and in your dark column there is no light. The orange colour in the dark are simple precipitates of iron oxides that are produced abiotically.

    Did you also see that you have small burrows of (now dead) worms that are full of iron oxides?