Results 31 to 40 of about 217,475 (280)

Charged Q-balls and boson stars and dynamics of charged test particles

, 2014
We construct electrically charged Q-balls and boson stars in a model with a scalar self-interaction potential resulting from gauge mediated supersymmetry breaking.
Brihaye, Yves, Diemer, Valeria, Hartmann, Betti   +2 more
core   +1 more source

Motions and world-line deviations in Einstein-Maxwell theory [PDF]

, 2000
We examine the motion of charged particles in gravitational and electro-magnetic background fields. We study in particular the deviation of world lines, describing the relative acceleration between particles on different space-time trajectories.
, A Balakin, Aliev A N, Balakin A, Einstein A, Ellis G F R, J W van Holten, Kerner R, Kerner R, Kerner R, Kerner R, Kerner R, Kramer D, Kriphlovich I B, Kunzinger M, Misner C W, Mohanty S, Petrov A Z, R Kerner, Rietdijk R H, Roberts M D, Steinbauer R, Synge J L, van Holten J W, van Holten J W, van Holten J W, van Holten J W, Weinberg S, Wong C   +28 more
core   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Impact of the mass and other parameters of charged particles on the results of laser resonance acceleration [PDF]

Biuletyn Wojskowej Akademii Technicznej, 2014
Theoretical and numerical analyses are presented concerning the conditions at whichthe charged particles of different masses can be accelerated to significant kinetic energy in the circularlypolarized laser or maser beams and a static magnetic field. The
Adam Dubik, Michał J. Małachowski
doaj   +1 more source

Bound Orbits and Epicyclic Motions around Renormalization Group Improved Schwarzschild Black Holes

Universe, 2022
We study timelike particles’ bound orbits around renormalization group improved Schwarzschild black holes (RGISBHs), which originate from renormalization group improvement of the Einstein–Hilbert action by using the running Newton constant.
Hou-Yu Lin, Xue-Mei Deng
doaj   +1 more source

Particle energization through time-periodic helical magnetic fields

, 2014
We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with coefficients $A=B=C=1$ are chaotic, and we show that the motion of a charged ...
Brandenburg, Axel, Dasgupta, Brahmananda, Mitra, Dhrubaditya, Niklasson, Eyvind, Ram, Abhay, Ram, Abhay K.   +5 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Ionic fluxes of charged particles at cathode region

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2007
We analyze the disperse particles charging at cathode region by collisional and diffusive mechanisms. The dependence of charge quantity at nanoparticles on their sizes and characteristics of motion in the electrical field is defined.
V. B. Oparin , M. V. Sosnina , K. N. Vinogradov   +2 more
doaj   +1 more source

Ion motion in the current sheet with sheared magnetic field – Part 2: Non-adiabatic effects [PDF]

Nonlinear Processes in Geophysics, 2013
We investigate dynamics of charged particles in current sheets with the sheared magnetic field. In our previouspaper (Artemyev et al., 2013) we studied the particle motion in such magnetic field configurations on the basis of the quasi-adiabatic theory ...
A. V. Artemyev, A. I. Neishtadt, L. M. Zelenyi   +2 more
doaj   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source