Diese Seite ist aus Gründen der Barrierefreiheit optimiert für aktuelle Browser. Sollten Sie einen älteren Browser verwenden, kann es zu Einschränkungen der Darstellung und Benutzbarkeit der Website kommen!
Geophysics Homepage
Log in

Superparamagnetic magnetite in the upper-beak tissue of homing pigeon

Hanzlik, M., C. Heunemann, E. Holtkamp-Rötzler, M. Winklhofer, N. Petersen, and G. Fleissner (2000), Superparamagnetic magnetite in the upper-beak tissue of homing pigeon, Biometals, 13(4), 325-331, doi:10.1023/A:1009214526685.

Homing pigeons have been subject of various studies trying to detect magnetic material which might be involved in magnetic field perception. Here we focus on the upper-beak skin of homing pigeons, a region that has previously been shown to contain nerves sensitive to changes of the ambient magnetic field. We localized Fe3+ concentrations in the subcutis and identified the material by transmission electronmicroscopy (TEM) as aggregates of magnetite nanocrystals (with grain sizes between 1 and 5 nm). The particles form clusters of 1-3 mum diameter, which are arranged in distinct coherent elongated structures, associated with nervous tissue and located between fat cells. Complementary low-temperature magnetic measurements confirm the microscopic observations of fine-grained superparamagnetic particles in the tissue. Neither electron-microscopic nor magnetic measurements revealed any single-domain magnetite in the upper-beak skin tissue.
  author = {M. Hanzlik and C. Heunemann and E. Holtkamp-R{\"o}tzler and M. Winklhofer and N. Petersen and G. Fleissner},
  journal = {Biometals},
  number = {4},
  pages = {325-331},
  title = {{Superparamagnetic magnetite in the upper-beak tissue of homing pigeon}},
  volume = {13},
  year = {2000},
  language = {en},
  doi = {10.1023/A:1009214526685},
%0 Journal Article
%A Hanzlik, M.
%A Heunemann, C.
%A Holtkamp-Rötzler, E.
%A Winklhofer, M.
%A Petersen, N.
%A Fleissner, G.
%D 2000
%N 4
%V 13
%J Biometals
%P 325-331
%T Superparamagnetic magnetite in the upper-beak tissue of homing pigeon
ImprintPrivacy PolicyContact
Printed 02. Dec 2021 04:22