caa a22 4500 477132448 CHVBK 20180405111707.0 cr unu---uuuuu 170330e19971201xx s 000 0 eng 10.1023/A:1018340920329 doi (NATIONALLICENCE)springer-10.1023/A:1018340920329 Analysis of magnetic material in the human heart, spleen and liver [Elektronische Daten] [P.P. Grassi-Schultheiss, F. Heller, J. Dobson] Isothermal remanent magnetization (IRM) acquisition and alternating field (A.F.) demagnetization analyses were performed on human heart, spleen and liver samples resected from cadavers. The magnetic properties of the samples were measured both at 77K and at 273K. A.F. demagnetization was performed at 273K. Results from the analyses of the tissue indicate the presence of ferromagnetic, fine-grained, magnetically interacting particles which, due primarily to magnetic properties, are thought to be magnetite and/or maghemite. The presence of superparamagnetic particles can be inferred from the increase in saturation IRM values when measured at 77K compared with measurements at 273K and the decay of remanent magnetization upon warming from 77K. The concentration of magnetic material (assuming it is magnetite or maghemite) in the samples varies from 13.7 ng g-1 to 343 ng g-1, with the heart tissue generally having the highest concentration. The presence of magnetic material in these organs may have implications for the function of biogenic magnetite in the human body. Chapman and Hall, 1997 heart nationallicence liver nationallicence maghemite nationallicence magnetite nationallicence spleen nationallicence Grassi-Schultheiss P.P. Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich, Switzerland and Department of Physics, Biophysics Programme, University of Western Australia, Perth, Australia aut Heller F. Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich, Switzerland and Department of Physics, Biophysics Programme, University of Western Australia, Perth, Australia aut Dobson J. Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich, Switzerland and Department of Physics, Biophysics Programme, University of Western Australia, Perth, Australia aut Biometals Kluwer Academic Publishers 10/4(1997-12-01), 351-355 0966-0844 10:4<351 1997 10 10534 https://doi.org/10.1023/A:1018340920329 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1018340920329 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grassi-Schultheiss P.P. Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich, Switzerland and Department of Physics, Biophysics Programme, University of Western Australia, Perth, Australia aut NATIONALLICENCE 700 1- Heller F. Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich, Switzerland and Department of Physics, Biophysics Programme, University of Western Australia, Perth, Australia aut NATIONALLICENCE 700 1- Dobson J. Swiss Federal Institute of Technology, ETH-Hönggerberg, Zürich, Switzerland and Department of Physics, Biophysics Programme, University of Western Australia, Perth, Australia aut NATIONALLICENCE 773 0- Biometals Kluwer Academic Publishers 10/4(1997-12-01), 351-355 0966-0844 10:4<351 1997 10 10534 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer