Results 41 to 50 of about 71,920 (208)

Inverse pH Gradient-Assay for Facile Characterization of Proton-Antiporters in Xenopus Oocytes

Membranes
Xenopus oocytes represent one of the most versatile model systems for characterizing the properties of membrane transporters. However, for studying proton-coupled antiporters, the use of Xenopus oocytes has so far been limited to so-called injection ...
Zeinu Mussa Belew, Christa Kanstrup, Chengyao Hua, Christoph Crocoll, Hussam Hassan Nour-Eldin   +4 more
doaj   +1 more source

Geodynamo Conductivity Limits

Geophysical Research Letters, 2019
In a metal, as in Earth's core, the thermal and electrical conductivities are assumed to be correlated. In a planetary dynamo this implies a contradiction: that both electrical conductivity, which makes it easier to induce current and magnetic field, and
Peter E. Driscoll, Zhixue Du
doaj   +1 more source

Supercriticality to subcriticality in dynamo transitions

, 2013
Evidence from numerical simulations suggest that the nature of dynamo transition changes from supercritical to subcritical as the magnetic Prandtl number is decreased.
Bhattacharjee J. K., Mahendra K. Verma, Moffatt H. K., Rakesh K. Yadav, Strogatz S. H.   +4 more
core   +1 more source

Multiple scale dynamo [PDF]

Proceedings of the National Academy of Sciences, 1997
A scaling law approach is used to simulate the dynamo process of the Earth’s core. The model is made of embedded turbulent domains of increasing dimensions, until the largest whose size is comparable with the site of the core, pervaded by large-scale magnetic fields.
, Le Mouël JL, C J, Allègre, C, Narteau   +2 more
openaire   +2 more sources

Magnetic Helicity Evolution During the Solar Activity Cycle: Observations and Dynamo Theory

, 2003
We study a simple model for the solar dynamo in the framework of the Parker migratory dynamo, with a nonlinear dynamo saturation mechanism based on magnetic helicity conservation arguments.
Abramenko, Abramenko, Baliunas, Bao, Berger, Blackman, Blackman, Brandenburg, Brandenburg, Brandenburg, Brooke, Bruevich, Chae, Covas, D. Moss, D. Sokoloff, Dikpati, Field, Frisch, Galitski, H. Zhang, Hoyt, I. Rogachevskii, Iroshnikov, K. Kuzanyan, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kuzanyan, Longcope, N. Kleeorin, Parker, Pevtsov, Pevtsov, Pevtsov, Rogachevskii, Rogachevskii, Rust, Rüdiger, Seehafer, Sofia, Sokoloff, Spruit, Subramanian, Tavakol, Wang, Woltjer, Zhang, Zhang, Zhang, Zhang, Zhang   +55 more
core   +1 more source

Development of plant extracts as substrates for untargeted transporter substrate identification in Xenopus oocytes

Frontiers in Plant Science
Amongst the thousands of transport proteins constituting approximately 10% of coding sequences in a genome, only few have an assigned function. Heterologous expression of transporters in combination with the use of plant extracts as complex mixtures of ...
Christos Theodorou, Victor de-Prado-Parralejo, Deyang Xu, Yoshimasa Todoroki, Louise Svenningsen, Tetsuya Mori, Christoph Crocoll, Masami Yokota Hirai, Hiroshi Tsugawa, Hiroshi Tsugawa, Hiroshi Tsugawa, Hussam Hassan Nour- Eldin, Barbara Ann Halkier   +12 more
doaj   +1 more source

Engineering Chiroptical Interactions through Integrating Plasmonic Arrays with Cholesteric Nanocellulose

Advanced Materials, EarlyView.
In this study, we demonstrate how the combination of plant‐based cellulose and gold nanoparticle lines produces robust, tunable chiral light control in composite films. The resulting plasmonic cellulose composite exhibits a strong plasmonic CD at the surface lattice resonance, along with an inversion of chiroptical response upon reversing the ...
Han Tao, Sunghwan Jo, Guang Chu, Xiaoyu Qi, Irene Estévez, Angel Lizana, Wenyang Xu, Shengwei Deng, Agustin Mihi, Eero Kontturi   +9 more
wiley   +1 more source

αΛ-dynamos [PDF]

International Astronomical Union Colloquium, 1991
AbstractIn contrast toαω-dynamos, where the angular velocity is arbitrarily prescribed, we consider hereαΛ-dynamos, for which the differential rotation and meridional circulation are solutions of the momentum equation. The non-diffusive parts of the Reynolds stress tensor are parameterized by theΛ-effect.
A. Brandenburg, D. Moss, M. Rieutord, G. Rüdiger, I. Tuominen   +4 more
openaire   +1 more source

Establishing a Lunar Origin for Paleomagnetic Records in Apollo Samples

Geophysical Research Letters, 2023
Numerous paleomagnetic studies attribute the magnetization preserved within Apollo samples to an ancient dynamo. However, other works propose that lunar rocks were instead magnetized by either transient impact‐related magnetic fields on the Moon or by ...
S. M. Tikoo, J. Jung
doaj   +1 more source

Kinematic dynamo action in a sphere. I. Effects of differential rotation and meridional circulation on solutions with axial dipole symmetry [PDF]

, 2000
A sphere containing electrically conducting fluid can generate a magnetic field by dynamo action, provided the flow is sufficiently complicated and vigorous. The dynamo mechanism is thought to sustain magnetic fields in planets and stars.
Arnoldi W. E., C. N. Barber, David Gubbins, Gilman P. A., J. J. Love, Mo®, Roberts G. O., Roberts P. H., S. Gibbons   +8 more
core   +1 more source