Biological permanent magnets
TLDR
The magnetic properties of magnetotactic bacteria have been determined by a variety of techniques, including pulsed hysteresis measurements on single cells as mentioned in this paper, which can be used to identify the magnetic properties.Abstract:
Magnetotactic bacteria orient and migrate along magnetic field lines. Each cell is essentially a self-propelled magnetic dipole. The magnetic properties of these bacteria have been determined by a variety of techniques, including pulsed hysteresis measurements on single cells.read more
Citations
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Journal ArticleDOI
Novel magnetic nanomaterials inspired by magnetotactic bacteria: Topical review
Tanya Prozorov,Dennis A. Bazylinski,Surya K. Mallapragada,Surya K. Mallapragada,Ruslan Prozorov,Ruslan Prozorov +5 more
TL;DR: In this article, the authors present a review of the current efforts on in vitro synthesis of a variety of magnetic nanoparticles using bioinspired approaches by utilizing mineralization proteins from magnetotactic bacteria, and survey biomimetic strategies for the rational synthesis of various magnetic nanomaterials under ambient conditions.
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Correlative Electron and Fluorescence Microscopy of Magnetotactic Bacteria in Liquid: Toward In Vivo Imaging
Taylor J. Woehl,Sanjay Kashyap,Emre Firlar,Teresa Perez-Gonzalez,Damien Faivre,Denis Trubitsyn,Dennis A. Bazylinski,Tanya Prozorov +7 more
TL;DR: A correlative scanning TEM (STEM) and fluorescence microscopy technique for imaging viable cells of Magnetospirillum magneticum strain AMB-1 in liquid using an in situ fluid cell TEM holder and indicated that the bacterial cell wall membrane did not sustain radiation damage during STEM imaging at low electron dose conditions.
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Magnetotactic bacteria: promising biosorbents for heavy metals
Wei Zhou,Yanzong Zhang,Ding Xiaohui,Yan Liu,Fei Shen,Xiaohong Zhang,Shihuai Deng,Hong Xiao,Gang Yang,Hong Peng +9 more
TL;DR: A green method to produce metal nanoparticles is provided, and an energy-efficient way to recover precious metals is put forward during biosorption.
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Impact of weak permanent magnetic field on antioxidant enzyme activities in radish seedlings
TL;DR: In this paper, the impact of weak permanent magnetic field (PMF) with magnetic flux density of 185-650 μT on activities of antioxidant enzymes in 5-day-old radish (Raphanus sativus L var radicula DC) seedlings was demonstrated.
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Diverse Intracellular Inclusion Types Within Magnetotactic Bacteria: Implications for Biogeochemical Cycling in Aquatic Environments
Jinhua Li,Peiyu Liu,Alima Tamaxia,Heng Zhang,Yan Liu,Jian Wang,Nicolas Menguy,Xiang Zhao,Andrew P. Roberts,Yongxin Pan +9 more
TL;DR: A conceptual model is proposed in which MTB drive biogeochemical elemental cycling within aquatic OATZ environments and contribute to the distribution and burial of biominerals in sediments.
References
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Book
Rock Magnetism: Fundamentals and Frontiers
David J. Dunlop,Özden Özdemir +1 more
TL;DR: In this article, the basic magnetism in nature has been studied and the fundamental properties of magnetism have been discussed. But the authors focus on the magnetism of metamorphic and igneous rocks rather than extraterrestrial magnetism.
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Rock Magnetism: Fundamentals and Frontiers
TL;DR: The first book on rock magnetism, Der Gesteinsmagnetismus by H. Haalck, was published in 1942, more than a decade before T. Nagata's Rock Magnetism, cited by Dunlop and Ozdemir as the earliest work on the subject as discussed by the authors.
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Characterization of the bacterial magnetosome membrane.
TL;DR: Intact magnetosomes of Aquaspirillum magnetotacticum were purified from broken cells by a magnetic separation technique and revealed the magnetite to be enclosed by a lipid bilayer admixed with proteins.
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Magneto-aerotaxis in Marine Coccoid Bacteria
TL;DR: It is reported that cells of a pure culture of a marine magnetotactic coccus, designated strain MC-1, formed microaerophilic bands in capillary tubes and used aerotaxis to migrate to a preferred oxygen concentration in an oxygen gradient.
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Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography
Rafal E. Dunin-Borkowski,Martha R. McCartney,Richard B. Frankel,Dennis A. Bazylinski,Mihály Pósfai,Peter R. Buseck +5 more
TL;DR: Off-axis electron holography in the transmission electron microscope was used to correlate the physical and magnetic microstructure of magnetite nanocrystals in magnetotactic bacteria to find shape anisotropy was found to dominate magnetocrystalline an isotropy in elongated crystals.