A comparative study of magnetic properties between whole cells and isolated magnetosomes of Magnetospirillum magneticum AMB-1
文献类型：期刊论文
| 作者 | Li, JH ; Pan, YX ; Liu, QS ; Qin, HF ; Deng, CL ; Che, RC ; Yang, XA |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2010 |
| 卷号 | 55期号:1页码:38 |
| 关键词 | INDIVIDUAL MAGNETOTACTIC BACTERIA FERROMAGNETIC-RESONANCE REMANENCE MEASUREMENTS BIOMINERALIZATION CHAINS BIOTECHNOLOGY SEDIMENTS FIELD |
| ISSN号 | 1001-6538 |
| 通讯作者 | Pan, YX: Chinese Acad Sci, Key Lab Earths Deep Interior, Inst Geol & Geophys, Beijing 100029, Peoples R China. |
| 中文摘要 | The magnetic properties of magnetosome magnetite are of interdisciplinary interest because magnetosomes are potential carriers of natural remanent magnetization and paleoenvironment, as well as novel nano-biomaterials in biotechnological and biomedical applications. We carried out magnetic and electron transmission microscopy analyses of fresh Magnetospirillum magneticum AMB-1 whole cells and isolated magnetosomes. Results revealed that AMB-1 synthesized single-domain magnetite magnetosomes, which are arranged in the form of linear fragmental chain. The distinct differences of magnetic properties between these two samples can be faithfully interpreted in terms of spatial arrangement of magnetosomes and magnetostatic interaction. For the whole cells, the strong intra-chain interactions and weak inter-chain interactions generate behaviors of non-interacting uniaxial single-domain particles. Its delta-ratio is 3.0 and passes the Moskowitz test. In contrast, the isolated magnetosome sample has reduced values of coercivity and delta-ratio (1.5), due to increasing three-dimensional magnetostatic interactions and collapse of magnetosome chains. These observations provide useful insights into applications of the biogenic magnetite (magnetosomes) in magnetic nano-materials and magnetofossils in the paleomagnetic and environmental magnetism. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [40821091, 40325011]; Chinese Academy of Sciences and Marie-Curie Fellowship (IIF) [MIF1-CT-2005-007555] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/32858]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li, JH,Pan, YX,Liu, QS,et al. A comparative study of magnetic properties between whole cells and isolated magnetosomes of Magnetospirillum magneticum AMB-1[J]. CHINESE SCIENCE BULLETIN,2010,55(1):38. |
| APA | Li, JH.,Pan, YX.,Liu, QS.,Qin, HF.,Deng, CL.,...&Yang, XA.(2010).A comparative study of magnetic properties between whole cells and isolated magnetosomes of Magnetospirillum magneticum AMB-1.CHINESE SCIENCE BULLETIN,55(1),38. |
| MLA | Li, JH,et al."A comparative study of magnetic properties between whole cells and isolated magnetosomes of Magnetospirillum magneticum AMB-1".CHINESE SCIENCE BULLETIN 55.1(2010):38. |
入库方式： OAI收割
来源：物理研究所
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