The magnetic nanoparticles (magnetite) were prepared through the fermentation of the Magnetospirillum strain WM-1 newly isolated by our group. The samples were characterized by TEM, SAED, XRD, rock magnetic analysis, and M?ssbauer spectroscopy. TEM and SAED measurements showed that the magnetosomes formed by strain WM-1 were single crystallites of high perfection with a cubic spinel structure of magnetite. X-ray measurements also fitted very well with standard Fe3O4 reflections with an inverse spinel structure of the magnetite core. The size of crystal as calculated by the Debye-Scherrer’s equation was approximately 55 nm. Rock magnetic analysis showed WM-1 synthesized single-domain magnetite magnetosomes, which were arranged in the form of linear chain. The high delta ratio ((δFC/δZFC=4) supported the criteria of Moskowitz test that there were intact magnetosomes chains in cells. The Verwey transition occurred at 105 K that closed to stoochiometric magnetite in composition. These observations provided useful insights into the biomineralization of magnetosomes and properties of M. WM-1 and potential application of biogenic magnetite in biomaterials and biomagnetism.
参考文献
| [1] | Yan, L.;Zhang, S.;Chen, P.;Wang, W.;Wang, Y.;Li, H. .Magnetic properties of Acidithiobacillus ferrooxidans[J].Materials science & engineering, C. Materials for Biogical applications,2013(7):4026-4031. |
| [2] | Dennis A. Bazylinski;Richard B. Frankel .MAGNETOSOME FORMATION IN PROKARYOTES[J].Nature reviews. Microbiology,2004(3):217-230. |
| [3] | Frankel RB;Bazylinski DA .How magnetotactic bacteria make magnetosomes queue up[J].Trends in Microbiology,2006(8):329-331. |
| [4] | Pan YX;Petersen N;Winklhofer M;Davila AF;Liu QS;Frederichs T;Hanzlik M;Zhu RX .Rock magnetic properties of uncultured magnetotactic bacteria[J].Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System,2005(3-4):311-325. |
| [5] | Weiss BP;Kim SS;Kirschvink JL;Kopp RE;Sankaran M;Kobayashi A;Komeili A .Magnetic tests for magnetosome chains in Martian meteorite ALH84001.[J].Proceedings of the National Academy of Sciences of the United States of America,2004(22):8281-8284. |
| [6] | Yoza B;Matsumoto M;Matsunaga T .DNA extraction using modified bacterial magnetic particles in the presence of amino silane compound[J].Journal of Biotechnology,2002(3):217-224. |
| [7] | Ipsita A. Banerjee;Lingtao Yu;Mutsuhiro Shima;Tomoko Yoshino;Haruko Takeyama;Tadashi Matsunaga;Hiroshi Matsui .Magnetic Nanotube Fabrication by Using Bacterial Magnetic Nanocrystals[J].Advanced Materials,2005(9):1128-1131. |
| [8] | Hergt R;Hiergeist R;Zeisberger M;Schuler D;Heyen U;Hilger I;Kaiser WA .Magnetic properties of bacterial magnetosomes as potential diagnostic and therapeutic tools[J].Journal of Magnetism and Magnetic Materials,2005(1):80-86. |
| [9] | Lang C;Schuler D .Biogenic nanoparticles: production, characterization, and application of bacterial magnetosomes[J].Journal of Physics. Condensed Matter,2006(38):S2815-S2828. |
| [10] | Lower, B.H.;Bazylinski, D.A. .The bacterial magnetosome: A unique prokaryotic organelle[J].Journal of molecular microbiology and biotechnology: JMMB,2013(1/2):63-80. |
| [11] | Kopp RE;Weiss BP;Maloof AC;Vali H;Nash CZ;Kirschvink JL .Chains, clumps, and strings: Magnetofossil taphonomy with ferromagnetic resonance spectroscopy[J].Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System,2006(1-2):10-25. |
| [12] | Benjamin P. Weiss;Soon Sam Kim;Joseph L. Kirschvink;Robert E. Kopp;Mohan Sankaran;Atsuko Kobayashi;Arash Komeili .Ferromagnetic resonance and low-temperature magnetic tests for biogenic magnetite[J].Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System,2004(1/2):73-89. |
| [13] | Li WB;Yu LJ;Zhou PP;Min Z .Isolation of magnetotactic bacterium WM-1 from freshwater sediment and phylogenetic characterization[J].Archives of microbiology,2007(1):97-102. |
| [14] | 李文兵,余龙江,周蓬蓬,朱敏.趋磁细菌的磁小体[J].中国生物工程杂志,2005(07):21-27. |
| [15] | Kundu S;Kale AA;Banpurkar AG .On the change in bacterial size and magnetosome features for Magnetospirillum magnetotacticum (MS-1) under high concentrations of zinc and nickel.[J].Biomaterials,2009(25):4211-4218. |
| [16] | Carter-Stiglitz B.;Moskowitz B.;Jackson M. .More on the low-temperature magnetism of stable single domain magnetite: Reversibility and non-stoichiometry - art. no. L06606[J].Geophysical Research Letters,2004(6):6606-0. |
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