About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

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Post by rabidrhymer » Wed Nov 02, 2005 7:39 am

we know that microbes having magnetosomes align themselves in the geomagnetic fields of th if i put an artificial magnet mear a colony of such microbes will they be attracted to the magnet like iron filings?...if not the why? :?:

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Post by Mjhavok » Thu Nov 24, 2005 12:18 pm

I actually have a to do a presentation on this 1 week today. They do align themselves to a magnetic field. Magenetosomes are lipid bound compounds of iron oxide Fe2O3 (magnetite).

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Post by ushishir » Thu Nov 24, 2005 10:03 pm

I don't think bacteria will be pulled towards a magnet - there is not enough magentic material in them. But they will swim towards or away from a magnet making them quite easy to isolate.

There has been some interesting research recently published on magnetic bacteria:

"An acidic protein aligns magnetosomes along a filamentous structure in magnetotactic bacteria" ... 04382.html

pdf: ... genPDF.pdf

Press release: ... 200511171/

interesting blog post: ... teria.html

The 3D reconstructions of the inside of the bacteria are particularly amazing.

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