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

Sunday, 22 May 2016

UniversidadDeCadiz_GrupoB4B7_Day 56

Hi everyone! We have observed both colums after other two weeks.

If you look up and down the bottle to which it has affected him the light, we can see that the water bottle is murkier due to the presence of cyanobacteria. Also at the top we are more amount of O2

If we go down in the bottle, we can distinguish three colors. These colors are green, yellow, orange and bright red. The color green is found near water and is due to the presence of cyanobacteria, which are producing O2

In the area of ​​yellow color, we find sulfur oxidizing bacteria, which use carbon as a source of organic matter. Find oxygen (bubbles) and hydrogen sulfide. Orange areas is due to the presence of red non-sulfur bacteria, in the presence of organic carbon source gives it color. The shades of light red color is due to the presence of red sulfur bacteria. In this area we find O2 as they use as reducing the H2S and generate sulfates.

The last area is black. In this area reducing bacteria sulfate. Using the sulfate product gives as H2S which react with the Fe (II) to produce iron sulfide, which is precipitated and this color giving the last zone.

 Comparing the column to light with the column to the dark can see that the water is too murky. We observed a thin layer of orange due to oxidation of iron. The color of the bottle is gray due to organic matter. Near the bottom of the bottle we look dark colors. By not meet the light, we will not see big changes in the bottle. Here hardly we find microorganisms.

 The bottle on the left is the one about which the light has influenced. However, the bottle on the right is the one about which the darkness has influenced

1 comment:

  1. What did you add to the column?

    In your column I do not see purple sulfur bacteria. Purple sulfur bacteria are not found where O2 and H2S coexist. I suppose you are refering to sulfide oxidising bacteria (colour white) but these cannot be found in your column either.

    In general nice descriptions, but there is one important note. In your dark column there are as many microorganisms as in the light exposed one. They are just different and you cannot appreciate them as much macroscopically as coloured bands. But just believe them that the column is as FULL of bacteria. :-)