Results 31 to 40 of about 165,018 (295)

Heating mechanisms in radio-frequency-driven ultracold plasmas [PDF]

open access: yesPhysical Review A, 2012
14 pages, 7 ...
Smorenburg, P.W.   +2 more
openaire   +3 more sources

Letter to the Editor
UHF electromagnetic emission stimulated by HF pumping of the ionosphere
[PDF]

open access: yesAnnales Geophysicae, 2002
UHF electromagnetic emission (with a frequency near 600 MHz) from the F-region of the ionosphere pumped by an HF powerful radio wave is revealed. Possible mechanisms of the emission excitation, such as plasma mode con-version, scattering or Earth ...
S. M. Grach   +6 more
doaj   +1 more source

Dusty space plasma diagnosis using temporal behavior of polar mesospheric summer echoes during active modification [PDF]

open access: yes, 2011
The objective of this paper is to study the effect of different plasma and dust parameters on Polar Mesospheric Summer Echoes (PMSE) temporal behavior after turn-on and turn-off of radio wave heating and to use these responses to diagnose the properties ...
Kosch, Michael   +4 more
core   +3 more sources

Effects on the Surface and Luminescence Properties of GaAs by SF6 Plasma Passivation

open access: yesCrystals, 2018
The passivation effects of the SF6 plasma on a GaAs surface has been investigated by using the radio frequency (RF) plasma method. The RF’s power, chamber pressure, and plasma treatment time are optimized by photoluminescence (PL), atomic force ...
Yumeng Xu   +6 more
doaj   +1 more source

Concept Study of Radio Frequency (RF) Plasma Thruster for Space Propulsion [PDF]

open access: yesINCAS Bulletin, 2016
Electric thrusters are capable of accelerating ions to speeds that are impossible to reach using chemical reaction. Recent advances in plasma-based concepts have led to the identification of electromagnetic (RF) generation and acceleration systems as ...
Anna-Maria Theodora ANDREESCU   +4 more
doaj   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

open access: yesFEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Structural biology of ferritin nanocages

open access: yesFEBS 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

Fabrication of spherical WC–Co powders by radio frequency plasma and heat treatment

open access: yesFenmo yejin jishu, 2021
Spherical WC–Co powders used for the 3D printing were successful prepared by the radio frequency (RF) plasma and the subsequent heat treatment, using the granulated WC–30Co powders prepared by spray drying method as the raw materials.
XIAO Meng   +4 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Superluminal Wave Activation at Relativistic Magnetized Shocks

open access: yesThe Astrophysical Journal Letters
Fast radio bursts (FRBs) are extremely energetic radio transients, where some are generated in magnetar magnetospheres and winds. Despite a growing number of observations, their emission mechanisms remain elusive.
Jens F. Mahlmann   +4 more
doaj   +1 more source

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