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

Monday, 11 May 2015

Cádiz,7B:Experiment of Winogradsky´s column. Seventh-tenth week(15th April-12th May).

Hello winobloggers:

This is my fifth post about our Winogradsky's column.I want to remember that in the before post I said that the thiobacillus transform the suplhides to sulphates( sulphuric acid) and, for this reason, these bacteria have proliferated.

These weeks,the brown part of the mix has progressed almost to the base of the bottle. Now, there is only one centimeter aproximately of black part.

Also, in this week, two green patchs have appeared in the brown part. One is situated in the dark side of the bottle and the other is in the light side.  We observed that the patch of the light side is bigger than the patch in dark side. We believe that these  are poblations of green sulfur bacteria that proccess the  sulphates( produced by thiobacillus) to sulfur again.

                                          Progress to the bottle in thee weeks.
                                         Dark side                                  Light side

                                                                  Friday, 24 th April.
Friday, 1st May.

Friday, 8th May.

Green Patchs.
                                                    Dark side                   Light side


  1. Nice observations! Why do your bugs need SO4--?

  2. Thanks!

    Because SO4- can fulfil the role of O2 in the respiratory chain (electron acceptor)

  3. Is the appearance/disappearance of the black color somehow related to the oxidative capacity of your microcosms?