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, 22 June 2017

UCA_8A_2: Day 14- Why, Winogradsky, why?

We added 20g of mud from Rio San Pedro, 60g of sand and some water, 0.2g of sugar, 0.2g of cellulose, 0.2g of plaster and 0.2g of sodium sulphate.

Today, our Winogradsky column appeared mostly black, mainly in the middle.
Anaerobic bacteria, which are in the deep zone of the column, have proliferate too much because of adding a lot of sulfate sources. They use these sulfate sources in their metabolism, producing H2S that has been accumulated at the bottom of the column (that is why depths are grey). That excess of H2S, which is toxic, prevent the growth of other bacteria so none of them can live on the surroundings.

What happened at the top? This part is still brown and looks like some kind of algae have grown due to they were further away from the source of H2S. But it will not last too much until the H2S reaches the top, killing them.

Survival of the fittest, life is too hard inside our winogradsky column.

No comments:

Post a comment