Results 61 to 70 of about 6,841 (202)

Swimming motion of rod-shaped magnetotactic bacteria: the effects of shape and growing magnetic moment

Frontiers in Microbiology, 2014
We investigatethe swimming motion of rod-shaped magnetotactic bacteriaaffiliated with the {it Nitrospirae } phylum in a viscous liquidunder the influence of an externally imposed, time-dependent magnetic field.By assuming that fluid motion driven bythe
Dali eKong, Wei eLin, Yongxin ePan, Keke eZhang   +3 more
doaj   +1 more source

Magnetic induction mapping of magnetite chains in magnetotactic bacteria at room temperature and close to the Verwey transition using electron holography [PDF]

, 2005
Off-axis electron holography in the transmission electron microscope is used to record magnetic induction maps of closely spaced magnetite crystals in magnetotactic bacteria at room temperature and after cooling the sample using liquid nitrogen.
Buseck, Peter R., Dunin-Borkowski, Rafael E., Harrison, R. J., Kasama, T., Pósfai, Mihály, Simpson, E. T.   +5 more
core   +1 more source

The Layout and Size of an Early Pre‐Pottery Neolithic B Small Settlement Revealed by Geophysical Prospection at Harbetsuvan Tepesi in Southeastern Anatolia

Archaeological Prospection, EarlyView.
ABSTRACT In Upper Mesopotamia, the transition from the Pre‐Pottery Neolithic A (PPNA) to Pre‐Pottery Neolithic B (PPNB) period, ca. 10 800–10 600 cal. BP, is marked by a series of changes in chipped stone industries, architectural forms, symbolic objects, regional distribution of settlements and long‐distance exchange networks among others.
Toshihiro Tada, Ryota Moriwaki, Kazuya Shimogama, Kenta Suzuki, Wataru Satake, Nurcan Küçükarslan, Celal Uludağ, Yoshihiro Nishiaki   +7 more
wiley   +1 more source

Magnetotactic bacteria in a droplet self-assemble into a rotary motor

Nature Communications, 2019
It remains peculiar how to generate macroscopic work by harnessing the microscopic activity of living or synthetic agents like bacteria or micro-robots. Vincenti et al.
Benoit Vincenti, Gabriel Ramos, Maria Luisa Cordero, Carine Douarche, Rodrigo Soto, Eric Clement   +5 more
doaj   +1 more source

Impact of Upward Oxygen Diffusion From the Oceanic Crust on the Magnetostratigraphy and Iron Biomineralization of East Pacific Ridge-Flank Sediments

Frontiers in Earth Science, 2021
Recent measurements of pore-water oxygen profiles in ridge flank sediments of the East Pacific Rise revealed an upward-directed diffusive oxygen flux from the hydrothermally active crust into the overlying sediment.
Adrian Felix Höfken, Adrian Felix Höfken, Tilo von Dobeneck, Tilo von Dobeneck, Thomas Kuhn, Sabine Kasten, Sabine Kasten, Sabine Kasten   +7 more
doaj   +1 more source

Actuated rheology of magnetic micro-swimmers suspensions : emergence of motor and brake states

, 2018
We study the effect of magnetic field on the rheology of magnetic micro-swimmers suspensions. We use a model of a dilute suspension under simple shear and subjected to a constant magnetic field.
Clément, Eric, Douarche, Carine, Vincenti, Benoit   +2 more
core   +1 more source

Bats Use Magnetite to Detect the Earth's Magnetic Field [PDF]

, 2008
While the role of magnetic cues for compass orientation has been confirmed in numerous animals, the mechanism of detection is still debated. Two hypotheses have been proposed, one based on a light dependent mechanism, apparently used by birds and another
AJ Kalmijn, CV Mora, DA Bazylinski, E Batschelet, ER Buchler, G Fleissner, G Kramer, HG Wallraff, HG Wallraff, JB Phillips, JC Diaz-Ricci, JL Gould, JL Kirschvink, JL Kirschvink, JL Kirschvink, JL Kirschvink, JL Kirschvink, JL Kirschvink, JL Kirschvink, Joseph L. Kirschvink, KJ Lohmann, KJ Lohmann, Martin Wikelski, MJM Leask, MM Walker, MM Walker, P Light, P Thalau, PJ Nemec, R Wiltschko, R Wiltschko, RA Holland, RA Holland, RA Holland, RC Beason, RC Beason, RE Wegner, Richard A. Holland, RP Blakemore, RP Blakemore, RP Blakemore, S Marhold, Sarah Frances Brosnan, TC Williams, TE Dennis, TH Flemming, Thomas G. Doak, TP Quinn, U Munro, W Wiltschko, W Wiltschko, W Wiltschko, W Wiltschko, W Wiltschko, WP Irwin, WW Cochran, Y Wang   +56 more
core   +4 more sources

Probing Cellular Activity Via Charge‐Sensitive Quantum Nanoprobes

Advanced Materials, Volume 38, Issue 14, 6 March 2026.
A new quantum sensing modality detects shifts in zero‐field splitting caused by charge rearrangement with diamond nanocrystals in response to cellular activity. These electric‐field‐driven effects provide an alternative to temperature‐based interpretations, enabling real‐time, single‐cell readout of inflammation.
Uri Zvi, Shivam Mundhra, David Ovetsky, Qing Chen, Aidan R. Jones, Stella Wang, Maria J. Román‐Vazquez, Marie Kim, Udoka M. Ibeh, Michele Ferro, Kunle Odunsi, Marina C. Garassino, Michael E. Flatté, Melody A. Swartz, Denis R. Candido, Aaron Esser‐Kahn, Peter C. Maurer   +16 more
wiley   +1 more source

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

Attenuated Bacteria‐Based Tumor Therapy: Clinical Application Risks, Marketing Approval Restrictions, and Coping Strategies

Advanced Science, Volume 13, Issue 16, 18 March 2026.
This review comprehensively overviews attenuated bacteria‐based tumor therapy, highlighting key methodologies and recent progress. It examines strategies for enhancing safety, stabilizing efficacy, optimizing manufacturing, and navigating regulatory pathways.
Yucheng Liu, Junhong Yao, Jiaxin Deng, Minjie Zhou, Kaiyue Shen, Shishuo Sun, Xiaoge Gao, Qing Zhang, Haiheng Xu   +8 more
wiley   +1 more source