Cyanobacteria Kit for Stromatolite Formation

Fossil stromatolites from the Precambrian era correspond to laminar structures formed by organisms possessing aerobic photosynthesis. Present-day cyanobacteria are the closest relatives to these organisms, as they are capable of forming such structures by trapping carbonate material. This kit allows for the demonstration of the formation principle of fossil stromatolites by observing the behavior of present-day cyanobacteria in a carbonated environment. In this experiment, cyanobacteria are cultivated in two mediums: a control culture in a standard growth medium, and a culture in a carbonated medium. From day 3 onwards, the appearance of crystals in the carbonated medium is observed: polarized light observation highlights the calcitic nature of the deposit produced by the cyanobacteria's activity. Format: 15 tests Experiment duration: 2 sessions of 50 minutes Storage duration: short up to 1 week; long up to 1 month (see instructions) Storage conditions: Room temperature + light (except BG11 at +4°C) This kit contains living organisms. Plan to purchase the kit 15 days before the lab session (or more if there is multiplication of microorganisms in a suitable culture medium). The kit includes: - 60 ml of Cyanobacteria - Growth medium to dilute - Carbonated medium to dilute - 30 sterile petri dishes 55 mm - 100 sterile pipettes 1 mL - 2 sterile pipettes 25 mL

For 15 pairs: Cyanobacteria: 60 mL. Growth medium to be diluted. Carbonate medium to be diluted. 30 sterile petri dishes: 55 mm. Sterile pipettes: 1 mL and 10 mL. Storage: 1 month.