Results 71 to 80 of about 3,992 (192)

Magnetosome vesicles are present before magnetite formation, and MamA is required for their activation [PDF]

, 2004
Bacterial magnetosomes are intracellular compartments that house highly ordered magnetite crystals. By using Magnetospirillum sp. AMB-1 as a model system, we show that magnetosome vesicles exist in the absence of magnetite, biomineralization of magnetite
Beveridge, Terrance J., Komeili, Arash, Newman, Dianne K., Vali, Hojatollah   +3 more
core  

Magnetic tests for magnetosome chains in Martian meteorite ALH84001 [PDF]

, 2004
Transmission electron microscopy studies have been used to argue that magnetite crystals in carbonate from Martian meteorite ALH84001 have a composition and morphology indistinguishable from that of magnetotactic bacteria.
Kim, Soon Sam, Kirschvink, Joseph L., Kobayashi, Atsuko, Komeili, Arash, Kopp, Robert E., Sankaran, Mohan, Weiss, Benjamin P.   +6 more
core   +1 more source

Unraveling the Enrichment Mechanisms of Rare Earth Elements in Deep‐Sea Sediments: An Environmental Magnetic Perspective

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Deep‐sea rare earth elements and yttrium (REY)‐rich sediments have attracted considerable attention since their discovery in 2011. However, the environmental factors controlling REY enrichment remain poorly understood, largely because paleoceanographic proxies are absent in pelagic clays.
Xiangfeng He, Jianxing Liu, Dongjie Bi, Yamin Zhang, Mu Huang, Miao Yu, Fengdeng Shi, Jianhua Gao, Xuefa Shi   +8 more
wiley   +1 more source

Magnetotactic bacteria, magnetosomes and their application

Microbiological Research, 2012
Magnetotactic bacteria (MTB) are a diverse group of microorganisms with the ability to orient and migrate along geomagnetic field lines. This unique feat is based on specific intracellular organelles, the magnetosomes, which, in most MTB, comprise nanometer-sized, membrane bound crystals of magnetic iron minerals and organized into chains via a ...
Yan, Lei, Zhang, Shuang, Chen, Peng, Liu, Hetao, Yin, Huanhuan, Li, Hongyu   +5 more
openaire   +2 more sources

Optimized method for preparation of IgG-binding bacterial magnetic nanoparticles.

PLoS ONE, 2014
In this study, the optimized method for designing IgG-binding magnetosomes based on integration of IgG-binding fusion proteins into magnetosome membrane in vitro is presented. Fusion proteins Mbb and Mistbb consisting of magnetosome membrane protein MamC
Denis S Grouzdev, Marina V Dziuba, Denis V Kurek, Alexander I Ovchinnikov, Nadezhda A Zhigalova, Boris B Kuznetsov, Konstantin G Skryabin   +6 more
doaj   +1 more source

Buckling of elastic filaments by discrete magnetic moments

, 2017
We study the buckling of an idealized, semiflexible filament along whose contour magnetic moments are placed. {We give analytic expressions for the critical stiffness of the filament below which it buckles due to the magnetic compression.
Boltz, Horst-Holger, Klumpp, Stefan
core   +1 more source

Recent Advances in Collective Behaviors of Micro/Nanomotor Swarms

Advanced Materials, Volume 38, Issue 9, 12 February 2026.
This review describes the driving forces behind collective motion, explores the self‐organization of micro/nano swarms across zero‐dimensional (0D), one‐dimensional (1D), two‐dimensional (2D), and three‐dimensional (3D) spaces, and highlights their potential in drug delivery, environmental monitoring, and smart devices.
Siwen Sun, Bingbing Sun, Alexander B. Cook, Tania Patiño Padial, Jan C. M. van Hest   +4 more
wiley   +1 more source

Biosensors and Drug Delivery in Oncotheranostics Using Inorganic Synthetic and Biogenic Magnetic Nanoparticles

Biosensors, 2022
Magnetic nanocarriers have attracted attention in translational oncology due to their ability to be employed both for tumor diagnostics and therapy. This review summarizes data on applications of synthetic and biogenic magnetic nanoparticles (MNPs) in ...
Tatiana M. Zimina, Nikita O. Sitkov, Kamil G. Gareev, Viacheslav Fedorov, Denis Grouzdev, Veronika Koziaeva, Huile Gao, Stephanie E. Combs, Maxim Shevtsov   +8 more
doaj   +1 more source

Time resolved 2 million year old supernova activity discovered in Earth's microfossil record

, 2016
Massive stars, which terminate their evolution as core collapse supernovae, are theoretically predicted to eject more than 1E-5 solar masses of the radioisotope 60Fe. If such an event occurs sufficiently close to our solar system, traces of the supernova
Bishop, Shawn, Chernenko, Valentyna, Deneva, Boyana, Egli, Ramon, Faestermann, Thomas, Famulok, Nicolai, Fimiani, Leticia, Gomez-Guzman, Jose Manuel, Hain, Karin, Hanzlik, Marianne, Korschinek, Gunther, Ludwig, Peter, Merchel, Silke, Rugel, Georg   +13 more
core   +1 more source

Directed Navigation of Magnetotactic Bacteria via Magnetotaxis in a 3D Vasculature‐On‐A‐Chip

Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.
A perfusable vascular network is developed to investigate MTB at the single‐microorganism level. MTB is demonstrated to successfully align and navigate along the magnetic field inside the microvessels. Abstract Magnetotactic bacteria (MTB), inherently motile and self‐powered, are promising biorobotic candidates for targeted anti‐cancer drug delivery ...
Brianna Bradley, Yuji Nashimoto, Aldo Gonzalez‐Lopez, Takeshi Hori, Hirokazu Kaji, Peter L. Davies, Carlos Escobedo   +6 more
wiley   +1 more source