scholarly journals Mouse Magnetic-field Nystagmus in Strong Static Magnetic Fields Is Dependent on the Presence of Nox3

2018 ◽  
Vol 39 (10) ◽  
pp. e1150-e1159 ◽  
Author(s):  
Bryan K. Ward ◽  
Yoon H. Lee ◽  
Dale C. Roberts ◽  
Ethan Naylor ◽  
Americo A. Migliaccio ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Static Magnetic Fields

scholarly journals Novel static magnetic field effects on green chemistry biosynthesis of silver nanoparticles in Saccharomyces cerevisiae

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ameni Kthiri ◽  
Selma Hamimed ◽  
Abdelhak Othmani ◽  
Ahmed Landoulsi ◽  
Siobhan O’Sullivan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Saccharomyces Cerevisiae ◽  
Silver Nanoparticles ◽  
Magnetic Fields ◽  
Green Chemistry ◽  
Static Magnetic Field ◽  
Culture Medium ◽  
Average Diameter ◽  
Magnetic Field Effects ◽  
Static Magnetic Fields

AbstractThe bacteriocidal properties of silver nanoparticles (AgNPs) depend on their average diameter (toxicity increases with decreasing diameter). In the present work, we describe novel green chemistry biosynthesis of AgNPs from AgNO3 added to cell-free culture medium of baker’s yeast, Saccharomyces cerevisiae, yielding nanoparticles in the range 11–25 nm. However, when yeast was grown in a moderate static magnetic field, AgNPs obtained from the resulting cell-free culture medium, were significantly smaller (2–12 nm) than those obtained without magnetic field. These latter nanoparticles were highly crystalline, stable and near-uniform shape. Furthermore, the antibacterial activity of AgNPs obtained from static magnetic fields were greater than those from control cultures. Static magnetic fields show a promising ability to generate biocidal nanoparticles via this novel green chemistry approach.

Static magnetic fields in vacuum

2018 ◽  
Author(s):  
J. Pierrus
Keyword(s):  
Magnetic Field ◽  
Problem Solving ◽  
Magnetic Fields ◽  
Vector Potential ◽  
Scalar Potential ◽  
Multipole Expansion ◽  
Magnetic Vector Potential ◽  
Magnetic Dipoles ◽  
Static Magnetic Fields ◽  
The Magnetic Field

Wherever possible, an attempt has been made to structure this chapter along similar lines to Chapter 2 (its electrostatic counterpart). Maxwell’s magnetostatic equations are derived from Ampere’s experimental law of force. These results, along with the Biot–Savart law, are then used to determine the magnetic field B arising from various stationary current distributions. The magnetic vector potential A emerges naturally during our discussion, and it features prominently in questions throughout the remainder of this book. Also mentioned is the magnetic scalar potential. Although of lesser theoretical significance than the vector potential, the magnetic scalar potential can sometimes be an effective problem-solving device. Some examples of this are provided. This chapter concludes by making a multipole expansion of A and introducing the magnetic multipole moments of a bounded distribution of stationary currents. Several applications involving magnetic dipoles and magnetic quadrupoles are given.

scholarly journals On interactions of static magnetic fields

2019 ◽  
Vol 70 (3) ◽  
pp. 253-255
Author(s):  
Ömer Zor
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Interaction Energy ◽  
Magnetic Charge ◽  
Dirac Monopole ◽  
Static Magnetic Fields ◽  
The Universe

Abstract We investigated the interaction energy of a Gilbertian magnetic charge with each of the “point” magnetic field sources. Finally we extrapolated a Dirac string can only be defined if there is at most one Dirac monopole in the medium. If there is only one Dirac monopole/string in the universe, the probability of detecting it is essential zero, such that Dirac’s monopole would remain just a “theorist’s particle”.

scholarly journals Effects of the electron spin on the nonlinear generation of quasi-static magnetic fields in a plasma

2010 ◽  
Vol 76 (6) ◽  
pp. 865-873 ◽  
Author(s):  
M. STEFAN ◽  
G. BRODIN ◽  
F. HAAS ◽  
M. MARKLUND
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electron Spin ◽  
High Frequency ◽  
Significant Contribution ◽  
Magnetic Field Generation ◽  
Temperature Plasma ◽  
Static Magnetic Fields ◽  
Nonlinear Generation ◽  
The Magnetic Field

AbstractThrough an extended kinetic model, we study the nonlinear generation of quasi-static magnetic fields by high-frequency fields in a plasma, taking into account the effects of the electron spin. It is found that although the largest part of the nonlinear current in a moderate density, moderate temperature plasma is due to the classical terms, the spin may still give a significant contribution to the magnetic field generation mechanism. Applications of our results are discussed.

Transmittal properties of a superconductor-ferromagnetic metamaterial subjected to magnetic fields generated by the permanent magnets

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542049
Author(s):  
H. Liu ◽  
X. T. Li ◽  
P. B. Zhou ◽  
H. Zhang ◽  
C. Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Permanent Magnets ◽  
Transformation Optics ◽  
Optimal Structure ◽  
Magnetic Shielding ◽  
Static Magnetic Fields ◽  
Coaxial Cylinders ◽  
Geometrical Distribution ◽  
The Magnetic Field

Superconductor-ferromagnetic (FN) metamaterial with effective magnetic shielding and transmittal properties that allow the cloaking and transferring of static magnetic fields has been introduced. Most metamaterials consist of different arrangements of superconducting and ferromagnetic materials whose performance and feasibility mainly depend on the involved materials, their geometrical distribution and the permeability of each. In this paper, combining the method of transformation optics with the design of metamaterials, we experimentally demonstrated a superconductor-FM metamaterial system, composed of two coaxial cylinders of different lengths, to investigate the influence of the length and the properties of superconducting material on the magnetic transferring properties of the magnetic field produced by the permanent magnets. By comparing the transmittal magnetic field of different cases, the optimal structure has been ultimately achieved in terms of calculating the transmitted magnetic field ratios. The insights attained by the present study are aimed to provide useful implications for the design of wireless energy transmission and increasing the efficiency of magnetic transmittal devices.

209Bi NQR Powder Spectra Influenced by Local and Applied Magnetic Fields

1994 ◽  
Vol 49 (1-2) ◽  
pp. 425-432 ◽  
Author(s):  
N. E. Ainbinder ◽  
G. A. Volgina ◽  
E. A. Kravchenko ◽  
A. N. Osipenko ◽  
A. A. Gippius ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Computer Simulation ◽  
Magnetic Fields ◽  
Experimental Techniques ◽  
Local Magnetic Field ◽  
Static Magnetic Fields ◽  
Local Magnetic Fields ◽  
Insight Into

Abstract Several experimental techniques have shown evidence for the existence of internal magnetic fields of the order of 200 G in α-Bi2O3 [1]. The asymmetrical 209Bi NQR lineshapes in Bi3O4Br also point to a source of poorly resolved splitting present in this compound. In order to obtain further insight into the origin of the local magnetic fields in these compounds the 209Bi NQR lineshapes of polycrystalline a-Bi2O3 and Bi3O4Br were recorded in weak (below 500 G) static magnetic fields. A calculation of the expected powder lineshapes in a-Bi2O3 under the influence of the internal and applied magnetic fields up to 1 kG was made. The results of the computer simulation are compared with the lineshapes recorded. From the 209Bi lineshapes ob­ served in the experiment, the local magnetic field at one of the two Bi-sites in Bi3O4Br was estimated.

scholarly journals Ab initio study of the enantio-selective magnetic-field-induced second harmonic generation in chiral molecules

2016 ◽  
Vol 18 (3) ◽  
pp. 1846-1858 ◽  
Author(s):  
Antonio Rizzo ◽  
G. L. J. A. Rikken ◽  
R. Mathevet
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Second Harmonic Generation ◽  
Ab Initio ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Experimental Setup ◽  
Ab Initio Study ◽  
Chiral Molecules ◽  
Static Magnetic Fields

Magnetic field induced SHG in chiral molecules is studied computationally. An experimental setup, exploiting intense static magnetic fields, is proposed.

Effect of Static Magnetic Fields on Creep of Aluminum Alloy

2017 ◽  
Vol 269 ◽  
pp. 1-6 ◽  
Author(s):  
Arkady A. Skvortsov ◽  
Danila E. Pshonkin ◽  
Mikhail N. Luk'yanov ◽  
Margarita R. Rybakova
Keyword(s):  
Magnetic Field ◽  
Plastic Deformation ◽  
Aluminum Alloy ◽  
Magnetic Fields ◽  
Time Dependence ◽  
Subject Matter ◽  
Practical Importance ◽  
Static Magnetic Fields ◽  
Creep Stage ◽  
Scientific Significance

The necessity and urgency of studying plastic deformation of metals is determined by both scientific significance of the problem and requirements of practice. So the objective of this work is investigation of aluminum alloy creep under action of static magnetic fields. This subject matter is of practical importance for engineering since the parts of engineering constructions are subject to various loads which may lead to their damage or even creep rupture. Based on the experiments performed by us, it is found that creeping increases under stable magnetic field; the main features appear at the first creep stage. Investigation of these processes will help to predict time dependence of creep strain and its rate as well as durability and plasticity at destruction.

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