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Now it turns out that the bacteria push themselves along by ejecting the slime from nozzles on their bodies. "They are little rockets," says Andrey Dobrynin, a polymer scientist at the University of Connecticut in Storrs.
Myxobacteria have 250 nozzles located on each end. By squirting slime from one set or the other they can dart forward or back at up to 10 micrometres per second.
Dobrynin and a colleague simulated the formation of the slime to see how it could generate thrust. Its key component is a polysaccharide - a chain of molecules created by a polymerisation process that links molecules together inside the nozzle. When the chain is created slowly, it oozes from the nozzles without creating motion. But when the chain is produced faster than the slime can escape, it is compressed and shoots out like silly string, giving the bacteria an extra push.
http://www.newscientist.com/article/dn8933-bacteria-use-slime-jets-to-get-around.html
Myxobacteria are quite an interesting bacteria because it's predatory and works as community very well.
I wonder how fast the slime has be "oozed" out to create motion and how much energy is used. I am still a bit sckeptical because I tried to located to the original study but the only study I found was the following one http://www.ncbi.nlm.nih.gov/entrez/..._uids=15997338&query_hl=2&itool=pubmed_docsum
This study seems to be based on computer generation and mathetical models. I wonder how good the model is?