Results 1 to 10 of about 1,291,187 (318)

Molybdenum Speciation and its Impact on Catalytic Activity during Methane Dehydroaromatization in Zeolite ZSM-5 as Revealed by Operando X-Ray Methods. [PDF]

Angew Chem Int Ed Engl, 2016
Lezcano-González I, Oord R, Rovezzi M, Glatzel P, Botchway SW, Weckhuysen BM, Beale AM.   +6 more
europepmc   +2 more sources

Course and Outcomes of Acute Coronary Syndrome in the Presence of New Coronavirus Infection COVID-19

Неотложная медицинская помощь, 2022
We analyzed the clinical condition of patients with COVID-19 of varying severity, changes in instrumental and laboratory parameters, and assessed the impact of the severity of the course of a new coronavirus infection on the outcomes of acute coronary ...
L. S. Kokov, S. S. Petrikov, M. M. Pisankina, E. A. Dashevsky, K. A. Popugayev, M. V. Parkhomenko, I. M. Kuzmina, I. S. Babayan, K. I. Vorontsova, L. T. Khamidova, E. V. Klychnikova, S. P. Goncharov, A. A. Spassky, A. I. Kramarenko   +13 more
doaj   +1 more source

A micro-computed tomographic study using a novel test model to assess the filling ability and volumetric changes of bioceramic root repair materials [PDF]

Restorative Dentistry & Endodontics, 2021
ObjectivesNew premixed bioceramic root repair materials require moisture for setting. Using micro-computed tomography (micro-CT), this study evaluated the filling ability and volumetric changes of calcium silicate-based repair materials (mineral trioxide
Fernanda Ferrari Esteves Torres, Jader Camilo Pinto, Gabriella Oliveira Figueira, Juliane Maria Guerreiro-Tanomaru, Mario Tanomaru-Filho   +4 more
doaj   +1 more source

The Statistical Uncertainties on X-Ray Flux and Spectral Parameters from Chandra ACIS-I Observations of Faint Sources: Application to the Cygnus OB2 Association

The Astrophysical Journal Supplement Series, 2023
We investigate the uncertainties of fitted X-ray model parameters and fluxes for relatively faint Chandra ACIS-I source spectra. Monte Carlo (MC) simulations are employed to construct a large set of 150,000 fake X-ray spectra in the low photon count ...
J. F. Albacete-Colombo, E. Flaccomio, J. J. Drake, N. J. Wright, M. Guarcello, V. Kashyap   +5 more
doaj   +1 more source

How do imaging protocols affect the assessment of root-end fillings? [PDF]

Restorative Dentistry & Endodontics, 2022
ObjectivesThis study investigated the impact of micro-computed tomography (micro-CT)-based voxel size on the analysis of material/dentin interface voids and thickness of different endodontic cements.Materials and MethodsFollowing root-end resection and ...
Fernanda Ferrari Esteves Torres, Reinhilde Jacobs, Mostafa EzEldeen, Karla de Faria-Vasconcelos, Juliane Maria Guerreiro-Tanomaru, Bernardo Camargo dos Santos, Mário Tanomaru-Filho   +6 more
doaj   +1 more source

Evaluation of the electrochemical performance of Ag containing AAO layers after extended exposure to a model corrosive medium

Journal of Electrochemical Science and Engineering, 2020
The coating procedure appears to be an indispensable finishing stage in the production of Al based industrial products, engineering facilities and equipment.
Stephan V. Kozhukharov, Christian Girginov, Denitsa Kiradzhiyska, Aleksander Tsanev, Georgy Avdeev   +4 more
doaj   +1 more source

Inhomogeneity of Cleaved Bulk MoS2 and Compensation of Its Charge Imbalances by Room‐Temperature Hydrogen Treatment

Advanced Materials Interfaces, 2023
Synthetic single crystals of bulk molybdenum disulphide cleaved in ultrahigh vacuum are mapped across a large (≈25 mm2) area by X‐ray photoelectron spectroscopy, both statically and transiently following above‐bandgap excitation by an ultrafast laser ...
Erika Giangrisostomi, Ruslan Ovsyannikov, Robert Haverkamp, Nomi L. A. N. Sorgenfrei, Stefan Neppl, Hikmet Sezen, Fredrik O. L. Johansson, Svante Svensson, Alexander Föhlisch   +8 more
doaj   +1 more source

Pre-processing methods in chest X-ray image classification.

PLoS ONE, 2022
BackgroundThe SARS-CoV-2 pandemic began in early 2020, paralyzing human life all over the world and threatening our security. Thus, the need for an effective, novel approach to diagnosing, preventing, and treating COVID-19 infections became paramount ...
Agata Giełczyk, Anna Marciniak, Martyna Tarczewska, Zbigniew Lutowski   +3 more
doaj   +1 more source

Comparative analysis of the methods of watermarking X-ray images

Journal of Computer Sciences Institute, 2021
This paper is devoted to the comparative analysis of watermarking algorithms for X-ray images. The techniques based on discrete wavelet transform (DWT), singular value decomposition (SVD) and DWT-SVD hybrid were compared.
Weronika Kulbaka, Paulina Paluch, Grzegorz Kozieł   +2 more
doaj   +1 more source

Self-aligned multi-layer X-ray absorption grating using large-area fabrication methods for X-ray phase-contrast imaging

Scientific Reports, 2023
X-ray phase-contrast (XPCi) imaging methods are an emerging medical imaging approach that provide significantly better soft tissue contrast and could function as a viable extension to conventional X-ray, CT, and even some MRI.
Abdollah Pil-Ali, Sahar Adnani, Karim S. Karim   +2 more
doaj   +1 more source