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Biological proton pumping in an oscillating electric field.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This paper models biological proton pumping in cytochrome c oxidase under an applied oscillating electric field. The authors report that proton pumping efficiency and steady-state electronic currents vary significantly with the field’s frequency and amplitude. A spectral analysis is described as…

Ising spin-glass transition in a magnetic field outside the limit of validity of mean-field theory.

RF Safe Research Library Jan 1, 2009 NEUTRAL UNKNOWN

This paper studies the spin-glass transition in a magnetic field using a diluted one-dimensional long-range Ising model with distance-dependent bond probability. The authors report evidence for a spin-glass transition in a magnetic field both within and beyond the mean-field regime. They also…

Extraordinary magnetic field enhancement with metallic nanowire: role of surface impedance in Babinet's principle for sub-skin-depth regime.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This paper proposes metallic nanowires as complementary structures to metallic nanogaps for enhancing magnetic fields. It reports magnetic field enhancement up to a factor of 300 and presents a surface-impedance-based analytic theory that is numerically confirmed. The authors also report that, in…

Electric field switching of the magnetic anisotropy of a ferromagnetic layer exchange coupled to the multiferroic compound BiFeO3.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This paper reports electric-field control of magnetic anisotropy in a Permalloy layer exchange-coupled to a multiferroic BiFeO3 single crystal. The anisotropy is described as arising from magnetic coupling to canted spins in BiFeO3’s cycloidal antiferromagnetic structure. An electric field-induced…

Magnetic field delocalization and flux inversion in fractional vortices in two-component superconductors.

RF Safe Research Library Jan 1, 2009 NEUTRAL UNKNOWN

This theoretical paper analyzes vortex solutions in two-component superconductors within a U(1) x U(1) Ginzburg-Landau framework. It reports that exponentially screened magnetic fields are only found in special cases, while most parameter choices yield delocalized magnetic fields with slowly…

Dominant mobility modulation by the electric field effect at the LaAlO3/SrTiO3 interface.

RF Safe Research Library Jan 1, 2009 NEUTRAL UNKNOWN

This Physical Review Letters paper reports magnetotransport measurements on a gated LaAlO3/SrTiO3 interface to assess the main effect of an applied gate electric field. The authors find that mobility changes dominate over sheet carrier density changes (mobility variation reported as nearly…

Microscopic dynamics of the orientation of a hydrated nanoparticle in an electric field.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This paper uses atomistic simulations to examine how a nonpolar nanoparticle suspended in water reorients under an applied electric field. The authors report that molecular-level effects increase the torque relative to continuum estimates and substantially speed up reorientation above a stated…

Quasiparticles of spatially anisotropic triangular antiferromagnets in a magnetic field.

RF Safe Research Library Jan 1, 2009 NEUTRAL UNKNOWN

This theoretical/physics study investigates spectral properties of a spin-1/2 Heisenberg antiferromagnet on an anisotropic triangular lattice in a magnetic field. It reports that interchain interactions in a magnetic field generate dominant modes that behave as quasiparticles, featuring anomalous…

Focused-ion-beam-assisted magnet fabrication and manipulation for magnetic field detection applications.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This engineering study describes a focused-ion-beam-assisted technique for fabricating reduced-size NdFeB nanomagnets and integrating them onto a thin-film bulk acoustic resonator (FBAR). After bonding the magnet, the FBAR showed a downshift in resonance frequency and a reduced quality factor. The…

Mitomycin C-associated radiofrequency microelectrocautery used in myringotomy in an animal model.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This experimental animal study compared tympanic membrane closure time after myringotomy performed by microknife versus radiofrequency microcautery, with and without mitomycin C. Radiofrequency myringotomy differed significantly from knife myringotomy, and the 0.7 mm radiofrequency tip combined…

Cutaneous remodeling and photorejuvenation using radiofrequency devices.

RF Safe Research Library Jan 1, 2009 REASSURANCE UNKNOWN

This concise review discusses radiofrequency (RF) dermatologic devices used for nonablative skin rejuvenation and related indications. It characterizes RF effects on tissue as primarily thermal, aiming to heat targeted skin layers to trigger collagen changes and subsequent remodeling. The abstract…

Role of cortical cell type and morphology in subthreshold and suprathreshold uniform electric field stimulation in vitro.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This in vitro study examined how cortical neuron morphology and cell type relate to responses under subthreshold and suprathreshold uniform electric fields in rat motor cortex slices. The authors report that morphology correlates with subthreshold somatic polarization and that layer V pyramidal…

Enhanced Detection Resonance Frequency Shift of a Piezoelectric Microcantilever Sensor by a DC Bias Electric Field in Humidity Detection.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This engineering study examined how a DC bias electric field affects the resonance frequency shift of a PMN-PT/tin piezoelectric microcantilever sensor during humidity detection. The authors report that applying a bias field enhanced the relative resonance frequency shift, with a maximum…

Theory for nanoparticle retention time in the helical channel of quadrupole magnetic field-flow fractionation.

RF Safe Research Library Jan 1, 2009 NEUTRAL UNKNOWN

This paper presents a theoretical treatment of nanoparticle retention in quadrupole magnetic field-flow fractionation (QMgFFF) using a helical separation channel. It defines the retention ratio as the ratio of transit times for non-retained versus retained material. Equations are derived for…

Sham Transcranial Magnetic Stimulation Using Electrical Stimulation of the Scalp.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This study describes development and validation of a sham rTMS approach that combines a matched sham coil (for look/sound) with scalp electrical stimulation (for sensation). In back-to-back comparisons, TMS-naïve participants reportedly could not tell active from sham, whereas experienced…

Mobile phone technology for children with type 1 and type 2 diabetes: a parent survey.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This cross-sectional web-based survey assessed parents' concerns about managing their children's diabetes and their attitudes toward a mobile-phone-integrated glucometer service that could transmit real-time glucose readings. Parents most commonly reported concerns about access to their child's…

Evaluation of the efficacy of pulsed electromagnetic field in the management of patients with diabetic polyneuropathy.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This randomized controlled trial evaluated low-power, low-frequency pulsed electromagnetic field (PEMF) therapy at 600 Hz and 800 Hz as an adjunct treatment for diabetic polyneuropathy. Thirty participants were randomized to 600 Hz PEMF, 800 Hz PEMF, or usual medical treatment for 12 days. The…

The influence of low-frequency magnetic field on plasma antioxidant capacity and heart rate.

RF Safe Research Library Jan 1, 2009 NEUTRAL MEDIUM

This animal study exposed Sprague-Dawley rats to a 40 Hz, 7 mT time-variable magnetic field and measured ECG heart rate and plasma antioxidant capacity before and after exposure, including after 14 days. The authors report a significant decrease in heart rate after 14 days. Antioxidant defence…

[Effects of 50 Hz sinusoidal magnetic field on Ca2+ release channel ryanodine receptor of sarcoplasmic reticulum vesicles].

RF Safe Research Library Jan 1, 2009 CONCERN MEDIUM

This in vitro study examined whether a 50 Hz sinusoidal magnetic field affects the sarcoplasmic reticulum calcium release channel RyR1. A 0.4 mT exposure for 30 minutes increased SR Ca2+ release rate and [(3)H]-ryanodine binding under NADH/NAD+ conditions. The authors also report increased NADH…

[Female genital toxicities of high-frequency electromagnetic field on rats].

RF Safe Research Library Jan 1, 2009 CONCERN MEDIUM

This rat study examined sub-chronic exposure to a 30 MHz electromagnetic field at 0–1600 V/m for 8 hours/day, 5 days/week, over 56 days. The authors report no change in ovarian wet weight, but dose-related changes in estrous cycle timing, reproductive hormones (higher LH and lower E2 at higher…

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