Results 11 to 20 of about 2,504,636 (253)

Diagnostics of active and eruptive prominences through hydrogen and helium lines modelling [PDF]

open access: yes, 2008
In this study we show how hydrogen and helium lines modelling can be used to make a diagnostic of active and eruptive prominences. One motivation for this work is to identify the physical conditions during prominence activation and eruption. Hydrogen and
Labrosse, N.   +2 more
core   +10 more sources

Surface-enhanced Raman spectroscopy reveals structure complexity difference in single extrapulmonary Mycobacterium tuberculosis bacteria with different drug resistance

open access: yesResults in Physics, 2023
In this work, we argue that the SERS technique allows distinguishing between drug-sensitive and drug-resistant strains on the level of resolution of individual mycobacteria.
Anastasia I. Lavrova   +5 more
doaj   +1 more source

Intensity and Polarization of Radiation Emerging from Rotating Accretion Disc with Increasing Height

open access: yesUniverse, 2020
We consider the radiation emission in continuum and spectral lines from rotating accretion disc with the progressive increasing height. It is known that for the plane accretion disc with homogeneous atmosphere the wave electric field E is perpendicular ...
Nikolai Silant’ev   +3 more
doaj   +1 more source

FT-infrared spectroscopic studies of lymphoma, lymphoid and myeloid leukaemia cell lines [PDF]

open access: yes, 2007
This paper presents a novel method to characterise spectral differences that distinguish leukaemia and lymphoma cell lines. This is based on objective spectral measurements of major cellular biochemical constituents and multivariate spectral ...
Babrah, Jaspreet   +11 more
core   +1 more source

Study on Spectral Interference in the Determination of Vanadium by ICP-OES

open access: yes, 2020
Vanadium is an important scarce resource and strategic metal, and often coexists with a variety of complex metals in the form of secondary mineral phases in nature.
Zhang Yi   +7 more
core   +1 more source

Nightside studies of coherent HF radar spectral width behaviour [PDF]

open access: yes, 2002
A previous case study found a relationship between high spectral width measured by the CUTLASS Finland HF radar and elevated electron temperatures observed by the EISCAT and ESR incoherent scatter radars in the post-midnight sector of magnetic local time.
J. A. Davies   +21 more
core   +2 more sources

Stark Broadening of N VI Spectral Lines

open access: yesUniverse, 2023
Stark broadening parameters, line widths and shifts, for 15 N VI multiplets are calculated using semiclassical perturbation theory for temperatures from 50,000 K to 2,000,000 K, and perturber density of 1016 cm−3. As perturbers have been taken electrons,
Milan S. Dimitrijević   +2 more
doaj   +1 more source

The Belgian Repository of Fundamental Atomic Data and Stellar Spectra (BRASS)

open access: yesAtoms, 2019
Background: BRASS (Belgian Repository of Fundamental Atomic Data and Stellar Spectra) is an international networking project for the development of a new public database providing accurate fundamental atomic data of vital importance for stellar ...
Alex Lobel   +9 more
doaj   +1 more source

The Magnetic Sensitivity of the (250–278 nm) Fe ii Polarization Spectrum

open access: yesThe Astrophysical Journal, 2023
This paper presents a theoretical investigation of the polarization and magnetic sensitivity of the near-ultraviolet (near-UV) solar spectral lines of Fe ii between 250 and 278 nm.
David Afonso Delgado   +2 more
doaj   +1 more source

A LIBS Spectral Self-Absorption Correction Method Using Voigt Profile Fitting for the Application of Magnesium Analysis in Phosphorus Ore

open access: yes, 2020
The concentration of MgO is one of the most important parameters in the phosphate ore flotation. The fast detection of the concentration of MgO has great significance for the optimization of the flotation, the improvement of the efficiency and the ...
Sun Lan-xiang   +4 more
core   +1 more source

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