期刊
EARTH PLANETS AND SPACE
卷 61, 期 1, 页码 143-150出版社
TERRA SCIENTIFIC PUBL CO
DOI: 10.1186/BF03352894
关键词
Magnetotactic bacteria; FORC diagrams; magnetite
资金
- European Union [EIF-2005-009637]
- Max Planck Society
In order to study the formation of magnetite in magnetotactic bacteria, FORC diagrams were measured on a set of cultured Magnetospirillum griphiswaldense, following an assay in which the iron uptake is used only for magnetite formation and not for cell growth. This enabled LIS to follow the magnetite formation independently of growth. The FORC diagrams showed a clear evolution from I size-distribution with a majority of superparamagnetic grains, to a distribution dominated by stable, single-domain grains, but still containing some superparamagnetic particles. TEM observations confirm this evolution. According to the saturation isothermal remanent magnetization cooling and warming Curves, the Verwey transition can only be seen in the most mature samples, and slightly below 120 K. This suggests that the samples may have suffered from some partial oxidation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据