mrandredparis Posted May 12, 2015 Share Posted May 12, 2015 Why during Pasteur's famous experiment can the micro organisms not make it through the curved neck to the broth? Link to comment Share on other sites More sharing options...
StringJunky Posted May 12, 2015 Share Posted May 12, 2015 (edited) Picture a colony of bacteria on a tiny bit of dust being blown around in the air. What will be its general direction in the absence of airflow? What causes it to go in that direction? Look which way the tube is pointing in the complete setup. Edited May 12, 2015 by StringJunky Link to comment Share on other sites More sharing options...
MonDie Posted May 12, 2015 Share Posted May 12, 2015 Its "general direction" isn't good enough. If even one gets in, it can colonize. Link to comment Share on other sites More sharing options...
StringJunky Posted May 12, 2015 Share Posted May 12, 2015 (edited) Its "general direction" isn't good enough. If even one gets in, it can colonize. I think the intact experiment will remain bacteria-free for the length of time it takes for the other one to grow a colony, which I think would be sufficient to illustrate Pasteur's point; indeed it was Edited May 12, 2015 by StringJunky 1 Link to comment Share on other sites More sharing options...
mrandredparis Posted May 13, 2015 Author Share Posted May 13, 2015 Thank you, great explanation Link to comment Share on other sites More sharing options...
StringJunky Posted May 13, 2015 Share Posted May 13, 2015 No prob. Link to comment Share on other sites More sharing options...
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