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!

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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

Tuesday, 2 May 2017

UCA_3A_2: Day 48 - Our column in process.

In the first week, we can see a black colour at the bottom of the column. This is a result of sulphydric production. Besides, there is water in the top of the column, where we can find an orangey brown colour (this is the zone provided with oxygen).  Moreover, consequently to have added a lot of mud and just a bit of sand, there is a part in the middle of the column that is completely grey and homogenous, where gases can’t pass through it. Due to this point, we can guess that there will be two separated communities.

In the second week, we observe that the homogenous part has decreased. Besides, we see a black colour in the top of the mud (there are bacteria that feed of sulphate and produce sulphydric acid). In another hand, the brown community are bacteria that are able to use oxygen.

After two weeks, we focus on our column again. As a result of have added a lot of mud, the development of the microorganisms  is very slow. The continuous black colour indicate us that bacteria keep producing H2S. Now, there is an orange colour that is a signal of the existence of photoheterotrophs microorganisms producers of iron.  

1 comment:

  1. Nice to see the succession of pictures. The orange rusty colour is different in the three weeks? What do these photoheterotrophs actually do? They certainly do not produce iron...;-) although that would be useful for us.