MOSSBAUER SPECTROSCOPIC STUDY OF IRON-OXIDE DEPOSITS IN LIVER-TISSUE FROM THE MARINE MAMMAL DUGONG DUGONG

Authors
CHUAANUSORN W STPIERRE TG BLACK G WEBB J MACEY DJ PARRY D
Citation
W. Chuaanusorn et al., MOSSBAUER SPECTROSCOPIC STUDY OF IRON-OXIDE DEPOSITS IN LIVER-TISSUE FROM THE MARINE MAMMAL DUGONG DUGONG, Hyperfine interactions, 91(1-4), 1994, pp. 899-904
Citations number
18
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Physics, Nuclear","Physics, Condensed Matter
Journal title
Hyperfine interactions → ACNP
ISSN journal
03043843
Volume
91
Issue
1-4
Year of publication
1994
Pages
899 - 904
Database
ISI
SICI code
0304-3843(1994)91:1-4<899:MSSOID>2.0.ZU;2-X
Abstract
A sample of liver from the marine mammal Dugong dugong was found to ha ve an iron concentration of 137 000 mu g g(-1) Fe dry weight. Histolog ical examination of the tissue revealed dense extracellular deposits o f iron-containing particles about 40 to 80 mu m in diameter. Mossbauer spectra of the sample at temperatures between 17 and 200 K show super paramagnetic behaviour with a mean superparamagnetic blocking temperat ure of about 67 K, with the sextet being extinguished between 160 and 200 K. The blocking temperature and spectral parameters are indicative of the goethite-like form of hemosiderin that has previously been rep orted in some iron-loaded thalassemic human tissues.