Results 21 to 30 of about 739,329 (309)

Measuring 14 elemental abundances with R=1,800 LAMOST spectra [PDF]

open access: yes, 2017
The LAMOST survey has acquired low-resolution spectra (R=1,800) for 5 million stars across the Milky Way, far more than any current stellar survey at a corresponding or higher spectral resolution.
Conroy, Charlie   +4 more
core   +3 more sources

Differences in the standardization of medicinal products based on extracts of chondroitin sulfate

open access: yesФармакоэкономика, 2021
Objective: a comparative analysis of 6 different chondroprotectors for injection, containing chondroitin sulfate (CS) based on natural extracts.Material and methods. Five samples were studied for each CS extract.
O. A. Gromova   +7 more
doaj   +1 more source

Elemental surface analysis at ambient pressure by electron-induced x-ray fluorescence [PDF]

open access: yes, 2003
The development of a portable surface elemental analysis tool, based on the excitation of characteristic x rays from samples at ambient pressure with a focused electron beam is described.
Barsic, David N.   +4 more
core   +1 more source

Simultaneous Determination of U-Pb Age and Trace Elements of Zircon by Laser Ablation Sector Field Inductively Coupled Plasma-Mass Spectrometry

open access: yesYankuang ceshi
Laser ablation sector field inductively coupled plasma-mass spectrometry (LA-SF-ICP-MS) is widely applied in U-Pb dating of zircon due to its remarkable sensitivity.
Linghao ZHAO   +5 more
doaj   +1 more source

Determination of Ketoconazole on a Gold Disk Microelectrode

open access: yesInternational Journal of Electrochemical Science, 2016
The oxidation of ketoconazole (an antifungal agent and strong CYP3A inhibitor) was investigated using a gold disk microelectrode of 25 μm in diameter.
O. Gladysz   +3 more
doaj   +1 more source

PIXE and ToF-SIMS analysis of streaker samplers filters [PDF]

open access: yes, 2004
This paper presents methodological innovations introduced in the characterisation of urban aerosol collected in Italy in a recent campaign. Two complementary ion beam analysis (IBA) techniques were used to analyse Nuclepore filters used in continuous ...
Adriaens, Mieke   +9 more
core   +2 more sources

Mechanochemical synthesis of AlCoCrFeNi powders via high-energy ball milling

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2023
AlCoCrFeNi powders in equimolar ratios were synthesized by mechanochemical synthesis on a high-energy ball milling machine (HEBM). The elemental and phase composition of AlCoCrFeNi powders before and after mechanochemical synthesis were investigated by ...
Е.Е. Камбаров   +3 more
doaj   +1 more source

Elemental Analysis and In Vitro Evaluation of Antibacterial and Antifungal Activities of Usnea barbata (L.) Weber ex F.H. Wigg from Călimani Mountains, Romania

open access: yesPlants, 2021
This study aims to complete our research on Usnea barbata (L.) Weber ex F.H. Wigg (U. barbata) from the Călimani Mountains, Romania, with an elemental analysis and to explore its antibacterial and antifungal potential.
Violeta Popovici   +11 more
doaj   +1 more source

Evaluation of the operational conditions in the production and morphology of Chlorella sp. [PDF]

open access: yesBrazilian Journal of Biology, 2020
It was evaluated the effect of operational conditions in the production of Chlorella sp. after its selection from genus Chlorella sp., Scenedesmus sp., Nannochloris sp., Tetraselmis sp. and Dunaliella salina.
L. Rendón-Castrillón   +3 more
doaj   +1 more source

Cno Abundances Of Hydrogen-Deficient Carbon And R Coronae Borealis Stars: A View Of The Nucleosynthesis In A White Dwarf Merger [PDF]

open access: yes, 2009
We present high-resolution (R similar to 50,000) observations of near-IR transitions of CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R Coronae Borealis (RCB) stars.
Eriksson, Kiell   +3 more
core   +1 more source

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