Results 31 to 40 of about 317,828 (221)

A liquid chromatography tandem mass spectrometry method for simultaneous analysis of 46 atmospheric particulate-phase persistent organic pollutants and comparison with gas chromatography/mass spectrometry, [PDF]

open access: yes, 2017
A novel multi-analyte method for the simultaneous determination of 46 compounds of environmental concern, most of them belonging to the category of persistent organic pollutants, was developed using high-performance liquid chromatography and the results ...
Bartocci, Martina   +4 more
core   +2 more sources

Silicon clusters produced by femtosecond laser ablation: Non-thermal emission and gas-phase condensation [PDF]

open access: yesApplied Physics A 79 (2004) 1591-1594, 2004
Neutral silicon clusters Si_n (up to n = 7) and their cations Si_n+ (up to n = 10) have been produced by femtosecond laser ablation of bulk silicon in vacuum and investigated using time-of-flight mass spectrometry. Two populations of the Si_n+ clusters with different velocity and abundance distributions in the ablation plume have been clearly ...
arxiv   +1 more source

Pyrolysis-Gas Chromatography/Mass Spectrometry of Polymeric Materials [PDF]

open access: yes, 2012
Examples of application of pyrolysis-gas chromatography-mass spectrometry technique for identification of different polymeric materials are ...
Peter Kusch
core   +2 more sources

Rational Engineering of Nanostructured AgM (M = Au, Pt, Pd) Bimetallic Electrodes via Galvanic Replacement for Glycerol Electrolysis

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates the feasibility of fabricating free‐standing carbon paper electrodes by electroplating and galvanic replacement. Nanostructured AgM (M = Au, Pt, Pd) bimetallic catalysts are directly grown on the electrode substrate, which exhibit good performance for glycerol electrolysis, a sustainable approach for the co‐production of green ...
Hui Luo, Maria‐Magdalena Titirici
wiley   +1 more source

Isolation of $^{236}$U and $^{239,240}$Pu from seawater samples and its determination by Accelerator Mass Spectrometry [PDF]

open access: yesTalanta, Volume 178, 2018, Pages 202-210
In this work we present and evaluate a radiochemical procedure optimised for the analysis of $^{236}$U and $^{239,240}$Pu in seawater samples by Accelerator Mass Spectrometry (AMS). The method is based on Fe(OH)$_3$ co-precipitation of actinides and uses TEVA and UTEVA extraction chromatography resins in a simplified way for the final U and Pu ...
arxiv   +1 more source

Activation cross sections of α-induced reactions on $^{nat}$Zn for Ge and Ga production [PDF]

open access: yesPublished in Nucl. Instr. Meth. B 427 (2018) 916, 2018
The production cross sections of $^{68,69}$Ge and $^{66,67}$Ga by \alpha-induced reactions on $^{nat}$Zn have been measured using the stacked-foil activation method and off-line \gamma-ray spectrometry from their threshold energies to 50.7 MeV. The derived cross sections were compared with the previous experimental data and the calculated values in the
arxiv   +1 more source

Hybrid Framework Materials: Next‐Generation Engineering Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Hybrid organic–inorganic materials merge the unique properties of organic and inorganic compounds, enabling applications in optoelectronics, gas storage, and catalysis. This review explores metal‐organic frameworks, hybrid organic–inorganic perovskites, and the emerging field of hybrid glasses, emphasizing their structures, functionalities, and ...
Jay McCarron   +2 more
wiley   +1 more source

Influence of Mg doping on In adsorption and In incorporation in (In,Ga)N superlattices [PDF]

open access: yesarXiv, 2020
We present a detailed investigation of the mechanisms at play for the incorporation of In and Mg on the GaN(0001) surface during plasma-assisted molecular beam epitaxy (PAMBE). First, we have studied the kinetics of In desorption in the presence of Mg either without or with N supply from the plasma cell by quadrupole mass spectrometry (QMS) in the line
arxiv  

Measurements of extremely low radioactivity levels in BOREXINO [PDF]

open access: yesAstropart.Phys.18:1-25,2002, 2001
The techniques researched, developed and applied towards the measurement of radioisotope concentrations at ultra-low levels in the real-time solar neutrino experiment BOREXINO at Gran Sasso are presented and illustrated with specific results of widespread interest.
arxiv   +1 more source

Comparison among single-phase test, automated screening method and GC/MS for the traceability of ketamine in urine [PDF]

open access: yes, 2022
BACKGROUND The use of ketamine, for non-medical purpose, results widespread also in Italy. This drug is not searched by institutional centers, charged of the responsibility to realize the execution of toxicological analysis based on the article 187 of ...
Capomassi, Angelica   +5 more
core   +2 more sources

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