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

Wednesday, 11 January 2017

Winogradsky’s Column


Team 7: Serasidis Konstantinos, Tsinoglou Makrina
Weeks: 5-7

During these three weeks there weren't observed any significant differences between the columns. However, between these weeks and the 4th week a main difference has been noticed in the Control column. The color of the water in the column appears to have green- brown color. In contrary with the 4th week the water had bright orange color. This difference is probably caused by the growth of cyanobacteria. Cyanoabcteria have oxygen-evolving photosynthesis like that of plants. Once the cyanobacteria start to grow they can oxygenate most of the water. So, the conditions in the water became aerobic and the purple non sulfur bacteria that need anaerobic conditions and are responsible for the orange color can’t grow anymore. That’s why the color in the water turned from orange to green after a few weeks.

The 7th week is the last week of Winogradsky’s columns growth. The experiment ended successfully and our hypothesis was confirmed. Our hypothesis was that in conditions that light is absence the growth of phototrophic bacteria will be absence too. The results have showed that clearly, as green and orange color that indicates the growth of phototrophic bacteria was present in the Control column and absence in column in the dark.

2.Column in the dark 

1. Control column  

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