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magnetosomes

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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magnetosomes

Postby lara » Tue Oct 04, 2005 11:33 am

bact.r said 2 hav inclusions of fe3o4 helpin' 2 orient in a magnetic field.do the same occur in migratory birdz??
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Postby Fried Zygote Sandwich » Tue Oct 04, 2005 5:13 pm

Ummm, what?
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Postby MrMistery » Tue Oct 04, 2005 5:53 pm

No. bacteria orient in a magentic field using magnetosoms. You can not find magnetosoms in eukaryotic cells.. I am not sure if we know exactly how birds detect the magnetic field... If anyone has any info on this i would be very interested...
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Postby ushishir » Wed Oct 05, 2005 6:34 am

MrMistery wrote:I am not sure if we know exactly how birds detect the magnetic field... If anyone has any info on this i would be very interested...


Here are some articles:

"The physics and neurobiology of magnetoreception". Nature Reviews Neuroscience 6: 703-712. - most recent http://www.biology.duke.edu/johnsenlab/ ... review.pdf

there are lots of other interesting publications on a variety of subjects available here: http://www.biology.duke.edu/johnsenlab/ ... tions.html

"Detection and Use of the Earth’s Magnetic Field by Aquatic Vertebrates" http://www.gps.caltech.edu/users/jkirsc ... quatic.pdf

"The magnetic sense and its use in long-distance navigation by animals" http://www.gps.caltech.edu/users/jkirsc ... Walker.pdf

http://www.gps.caltech.edu/users/jkirschvink/

"Mechanisms of Magnetic Orientation in Birds" http://www.aphis.usda.gov/ws/nwrc/is/05 ... son051.pdf

Several articles on magnetoreception: http://www.unc.edu/depts/geomag/pubs.htm
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Postby MrMistery » Thu Oct 06, 2005 6:57 pm

Thanks, man. owe you one..
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Postby Mjhavok » Thu Oct 06, 2005 9:34 pm

ushishir wrote:
MrMistery wrote:I am not sure if we know exactly how birds detect the magnetic field... If anyone has any info on this i would be very interested...


Here are some articles:

"The physics and neurobiology of magnetoreception". Nature Reviews Neuroscience 6: 703-712. - most recent http://www.biology.duke.edu/johnsenlab/ ... review.pdf

there are lots of other interesting publications on a variety of subjects available here: http://www.biology.duke.edu/johnsenlab/ ... tions.html

"Detection and Use of the Earth’s Magnetic Field by Aquatic Vertebrates" http://www.gps.caltech.edu/users/jkirsc ... quatic.pdf

"The magnetic sense and its use in long-distance navigation by animals" http://www.gps.caltech.edu/users/jkirsc ... Walker.pdf

http://www.gps.caltech.edu/users/jkirschvink/

"Mechanisms of Magnetic Orientation in Birds" http://www.aphis.usda.gov/ws/nwrc/is/05 ... son051.pdf

Several articles on magnetoreception: http://www.unc.edu/depts/geomag/pubs.htm



I have to right an essay and do a 10 minute oral presentation on Magenetotactic bacteria. Will these be of any use.
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Postby MrMistery » Fri Oct 07, 2005 5:51 pm

No, those are about how birds detect magnetic fields. Do a google search, there are bound to be a lot of things on the internet about this..
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Postby ushishir » Fri Oct 07, 2005 6:01 pm

Mjhavok wrote: I have to right an essay and do a 10 minute oral presentation on Magenetotactic bacteria. Will these be of any use.


Probably not they mainly focus on vertebrates. But this article has lost of interesting information on magnetosomes and magnetotactic bacteria (probably far more than you need):
'MAGNETOSOME FORMATION IN PROKARYOTES' : http://www.calpoly.edu/~rfrankel/NatRevMicro.pdf

probably not as useful, but still interesting 'The biomineralization of magnetosomes in Magnetospirillum
gryphiswaldense' http://www.im.microbios.org/articles020 ... chuler.pdf

some other links:
http://www.agu.org/revgeophys/moskow01/node2.html
http://www.calpoly.edu/~rfrankel/mtbcalpoly.html
http://www.biophysics.uwa.edu.au/STAWA/TEM_images.html (some nice pictures if that's useful)
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Postby benny » Sun Oct 16, 2005 4:42 am

i did an assignment on extraterrestrial life and one of the articles i cited was about magnetosomes etc.

"Magnetite morphology and life on Mars" Proceedings of the national academy of sciences, nov. 20. 2001 vol 98, pp13490-13495. half a million authors.
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Postby MrMistery » Sun Oct 16, 2005 4:26 pm

Page 13000? Volume 98? No wonder it took half a milion authors...
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Postby benny » Sun Oct 23, 2005 12:12 pm

maybe i made a booboo. :roll: the article title etc was dead on though. and it did have half a million authors. or at least a lot. :shock:
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Postby canalon » Mon Oct 24, 2005 1:08 pm

Proceedings of the National Academy of Science (of the United States) is a periodical publication. And, if I am not wrong, they change volume every year. As for page 13000 this is just because they keep the pagination continuing of each monthly issue of the journal, and they publish more and more papers, and Scientist are not always short :wink:

The reference seem completely correct to me.

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