With this study, we present the development of a transportable x-ray emission spectrometer (XES) that was realized in net time 20 h, order to verify presence Platinum (Pt) gold Celtic coins belonging 3rd–1st century BCE. Prior XES measurements using Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM-EDS) revealed were made highly concentrated (Au) alloy trace amounts ...

in this paper we study right $n$-engel group elements‎. ‎by modifying a group constructed by newman and nickel‎, ‎we construct‎, ‎for each integer $ngeq 5$‎, ‎a 2-generator group $g =langle a‎, ‎brangle$ with the property that $b$ is a right $n$-engel‎ ‎element but where $[b^k,_n a]$ is of infinite order when $knotin {0‎, ‎1}$‎.

Platinum group elements (PGEs) are widely-used electrocatalysts. However, the low abundance of PGEs in earth's crust and high environmental impacts to be acquired result costs, limiting their use drinking water treatment. Identifying sustainable alternatives is a major barrier applying electrocatalysis for nitrate reduction. By moving up periodic table, this study provides framework selecting p...

Platinum group elements (PGEs) are among the least abundant in continental crust. They have become excellent tracers of anthropogenic activities, particularly due to their use catalytic converters or medical industry. However, quantification environmental matrices is still problematic because low concentrations combined with presence interfering elements. Preconcentration methods therefore nece...