Results 81 to 90 of about 287,975 (304)

Proton-Induced X-Ray Emission Spectrometry in Archaeology

, 1987
Proton-induced x-ray emission (PIXE) spectrometry is fast developing a reputation as a powerful analytical tool in the study of a range of ancient materials, including bronze, iron, gold, glass, faience, and smelting slag. PIXE data allows determination of the primary constituents which would indicate their recipe of production and determine their bulk
Swann, C. P., Fleming, S. J.
openaire   +1 more source

Energy dependence of x‐ray beam size produced by polycapillary x‐ray optics

X-Ray Spectrometry
In this work, we studied the x‐ray energy dependence of x‐ray beam diameter focused by polycapillary optics. A quantitative beam diameter–energy relation enables more accurate estimation of the element‐specific interrogation area of a sample using the ...
Anusheela Das, C. Heirwegh, N. Gao, W. T. Elam, Lawrence A Wade, Benton C. Clark, J. Hurowitz, S. VanBommel, Michael W. M. Jones, Abigail C. Allwood   +9 more
semanticscholar   +1 more source

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

Advanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal, Laura Calderón‐Rodríguez, Oksana Smirnova, Eren Grossmann, Aparna Binu Varghese, Karen Marlenne Garcia Alvarez, Andreas Schneemann, Thomas Hoyer, Ralf Wyrwa, Felix Helmut Schacher, Alexander Knebel   +10 more
wiley   +1 more source

A Phantom-Based Study of the X-Ray Fluorescence Detectability of Iron, Copper, Zinc, and Selenium in the Human Blood of Superficial and Cutaneous Vasculature

Metrology
Blood concentrations of essential trace elements can be used to diagnose conditions and diseases associated with excess or deficiency of these elements.
Mihai Raul Gherase, Vega Mahajan
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Analysis of Trace Elements in Human Brain: Its Aim, Methods, and Concentration Levels

Frontiers in Chemistry, 2019
Trace elements play a crucial role in many biochemical processes, mainly as components of vitamins and enzymes. Although small amounts of metal ions have protective properties, excess metal levels result in oxidative injury, which is why metal ion ...
Cezary Grochowski, Cezary Grochowski, Eliza Blicharska, Paweł Krukow, Kamil Jonak, Kamil Jonak, Marcin Maciejewski, Dariusz Szczepanek, Katarzyna Jonak, Jolanta Flieger, Ryszard Maciejewski   +10 more
doaj   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Sheet-like MoO₃ nanostructures with improved charge storage: Relationships among structural, optical, and electrochemical properties

Next Energy
The molybdenum trioxide (MoO₃) nanosheets were synthesized via thermal decomposition and thoroughly characterized for their structural, morphological, optical, and electrochemical properties.
A.P. Nagendra Babu, N. Pradeep, C.G. Renuka   +2 more
doaj   +1 more source

The Analytical Techniques Used for the Determination of Metallic Elements in Crude Oils and by-Products. A Review Les méthodes analytiques utilisées pour la détermination d'éléments métalliques dans les pétroles bruts et leurs dérivés. Synthèse bibliographique

Oil & Gas Science and Technology, 2006
A review is made of the most important analytical techniques for determining metals such as lead, iron, vanadium, nickel, copper, chromium, cobalt and sodium which are present in crude oils and by-products.
Rodriguez A. R., Gonzalez M. C.
doaj   +1 more source

Minerals from Macedonia. XXVIII. A tribute to academician Gligor Jovanovski

Macedonian Journal of Chemistry and Chemical Engineering, 2015
It is both rewarding and difficult to write a review article about the contributions of acade­mician Gligor Jovanovski to the study of minerals from Macedonia.
Bojan Šoptrajanov
doaj   +1 more source