Results 41 to 50 of about 257,792 (306)

Investigation of Alpha-Proton Drift Speeds in the Solar Wind: WIND and HELIOS Observations

open access: yesUniverse, 2022
In this paper, we present an analysis of how alpha–proton drift speeds (the difference between the magnitudes of alpha and bulk proton speeds) are constrained in the inner heliosphere using observations from the WIND and twin HELIOS spacecraft. The solar
Vamsee Krishna Jagarlamudi   +6 more
doaj   +1 more source

Influence of photon, proton and carbon ion irradiation on differentiation, maturation and functionality of dendritic cells

open access: yesFrontiers in Bioscience-Scholar, 2022
While the primary purpose of radiotherapy (RT) is the elimination of cancer cells by inducing DNA-damage, considerable evidence emerges that anti-neoplastic effects extend beyond mere tumor cell killing. These secondary effects are based on activation of
Laila König   +7 more
doaj   +1 more source

Monte Carlo-based Investigation of Absorbed-dose Energy Dependence of Thermoluminescent Dosimeters in Therapeutic Proton and Carbon Ion Beams

open access: yesJournal of Medical Physics
Background: The present study is aimed at calculating relative absorbed-dose energy response correction (R) of commonly used thermoluminescent dosimeters (TLDs) such as LiF, Li2B4O7, and Al2O3 as a function of depth in water for protons (50–250 MeV/n ...
Arghya Chattaraj   +2 more
doaj   +1 more source

Energy Dynamics in the Brain: Contributions of Astrocytes to Metabolism and pH Homeostasis

open access: yesFrontiers in Neuroscience, 2019
Regulation of metabolism is complex and involves enzymes and membrane transporters, which form networks to support energy dynamics. Lactate, as a metabolic intermediate from glucose or glycogen breakdown, appears to play a major role as additional ...
Joachim W. Deitmer   +4 more
doaj   +1 more source

Evaluation of Histone Deacetylase Inhibitors as Radiosensitizers for Proton and Light Ion Radiotherapy

open access: yesFrontiers in Oncology, 2021
Significant opportunities remain for pharmacologically enhancing the clinical effectiveness of proton and carbon ion-based radiotherapies to achieve both tumor cell radiosensitization and normal tissue radioprotection.
Alicia M. Johnson   +8 more
doaj   +1 more source

Study of light ions acceleration in a diode with a solid target and registration of nuclear proton-boron reaction products generated in the plasma diode [PDF]

open access: yesЯдерна фізика та енергетика
The results of proton fluxes registration and the nuclear reactions (p + 11B > 3α) they induce on boron-containing targets in a plasma diode pinch, generated by irradiation of the anode target with a relativistic electron beam, are presented.
A. A. Gurin   +4 more
doaj   +1 more source

Production Cross-Section Measurements for Terbium Radionuclides of Medical Interest Produced in Tantalum Targets Irradiated by 0.3 to 1.7 GeV Protons and Corresponding Thick Target Yield Calculations

open access: yesFrontiers in Medicine, 2021
This work presents the production cross-sections of Ce, Tb and Dy radionuclides produced by 300 MeV to 1.7 GeV proton-induced spallation reactions in thin tantalum targets as well as the related Thick Target production Yield (TTY) values and ratios.
Charlotte Duchemin   +15 more
doaj   +1 more source

Water, Protons, and the Gating of Voltage-Gated Potassium Channels

open access: yesMembranes
Ion channels are ubiquitous throughout all forms of life. Potassium channels are even found in viruses. Every cell must communicate with its surroundings, so all cells have them, and excitable cells, in particular, especially nerve cells, depend on the ...
Alisher M. Kariev, Michael E. Green
doaj   +1 more source

A Bioelectronic Platform Modulates pH in Biologically Relevant Conditions

open access: yesAdvanced Science, 2019
Bioelectronic devices that modulate pH can affect critical biological processes including enzymatic activity, oxidative phosphorylation, and neuronal excitability.
Xenofon Strakosas   +6 more
doaj   +1 more source

The pick-up of cometary protons by the solar wind [PDF]

open access: yes, 1987
The High Energy Range Spectrometer (HERS) of the Ion Mass Spectrometer on the Giotto spacecraft measured the 3-dimensional distribution of picked-up cometary protons over a distance of approximately 8 million km upstream of the bow shock of Comet Halley.
eated solar wind protons.   +1 more
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