Studies on a freshwater magnetotactic coccus

Authors
Citation
Xl. Wu et Yw. Du, Studies on a freshwater magnetotactic coccus, ACT PHY C E, 48(12), 1999, pp. S304-S308
Citations number
7
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA SINICA
ISSN journal
1000-3290 → ACNP
Volume
48
Issue
12
Year of publication
1999
Supplement
S
Pages
S304 - S308
Database
ISI
SICI code
1000-3290(199912)48:12<S304:SOAFMC>2.0.ZU;2-T
Abstract
We report a previously undescribed magnetic coccus, designated NMC-1, that was present in surface sediments collected from the pool in Nanjing suburbs . They orientated and navigated along geomagnetic field lines. Transmission electron microscope photographs showed that the NMC-1 contained over ten m agnetosomes. The individual mature crystal was 70 nm in length and 40 nm in width, which were within the calculated stability field for single-domain magnetite. The energy profile of X-rays was collected after electron excita tion of the magnetosomes within a single cell. Iron was the predominant det ectable element in the particles. Electron diffraction pattern indicated th e magnetosomes are single crystals.