Results 101 to 110 of about 58,492 (234)

Astrocytes: Orchestrators of brain gas exchange and oxygen homeostasis

The Journal of Physiology, EarlyView.
Abstract figure legend Oxygen and carbon dioxide enter the body via breathing; in the brain astrocytes play a key role balancing oxygen delivery with carbon dioxide removal. Abstract If we consider neurons like muscles during exercise, the demand for oxygen (O2) and carbon dioxide (CO2) elimination is constantly changing.
Isabel N. Christie
wiley   +1 more source

Hydrogen response to high‐density dislocations in bulk perovskite oxide SrTiO3

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
High‐density dislocations are engineered into single‐crystal strontium titanate using cyclic Brinell indentation scratch tests at room temperature. These dislocations are found effective in uptaking hydrogen. Abstract Hydrogen plays an increasingly important role in green energy technologies. For instance, proton‐conducting oxides with high performance
Xufei Fang, Lars Dörrer, Svetlana Korneychuk, Maria Vrellou, Alexander Welle, Stefan Wagner, Astrid Pundt, Harald Schmidt, Christoph Kirchlechner   +8 more
wiley   +1 more source

Free Volume and Gas Permeation in Anthracene Maleimide-Based Polymers of Intrinsic Microporosity

Membranes, 2015
High free-volume copolymers were prepared via polycondensation with 2,3,5,6,-tetrafluoroterephthalonitrile (TFTPN) in which a portion of the 3,3,3',3'-tetramethyl-1,1'-spirobisindane (TTSBI) of PIM-1 was replaced with dibutyl anthracene maleimide (4bIII)
Muntazim Munir Khan, Volkan Filiz, Thomas Emmler, Volker Abetz, Toenjes Koschine, Klaus Rätzke, Franz Faupel, Werner Egger, Luca Ravelli   +8 more
doaj   +1 more source

Positron lifetime spectroscopy for investigation of thin polymer coatings [PDF]

In the aerospace industry, applications for polymer coatings are increasing. They are now used for thermal control on aerospace structures and for protective insulating layers on optical and microelectronic components.
Eftekhari, Abe, Singh, Jag J., Sprinkle, Danny R.   +2 more
core   +1 more source

The evidence of quasi-free positronium state in GiPS-AMOC spectra of glycerol

, 2013
We present the results of processing of Age-Momentum Correlation (AMOC) spectra that were measured for glycerol by the Gamma-induced positron spectroscopy (GiPS) facility.
Butterling, M., Krause-Rehberg, R., Stepanov, S. V., Wagner, A., Zvezhinskiy, D.   +4 more
core   +1 more source

From polymer to SiOC glass: structure, microstructure, mechanical, and thermal properties

Journal of the American Ceramic Society, Volume 108, Issue 12, December 2025.
Abstract The transformation of a methyl‐siloxane into a SiOC glass in Ar and reactive CO2 atmosphere was studied through positron annihilation spectroscopy, infrared spectroscopy, density, and calorimetric measurements, whereas the mechanical properties were monitored by nanoindentation and the thermal diffusivity measured by the laser flash method ...
Mattia Biesuz, Adane M. Abebe, Levent Karacasulu, Sebastiano Mariazzi, Roberto S. Brusa, Daria Szewczyk, Nicola Pugno, Giacomo Sero, Maik Butterling, Maciej Oskar Liedke, Andreas Wagner, Eric Hirschmann, Michele Cassetta, Gian D. Sorarù   +13 more
wiley   +1 more source

Positron annihilation study on defect repair of pure iron and RPV steel under electropulsing treatment

He jishu
BackgroundThe defects generated during the working process of metal materials have a significant impact on their performance. For example, the radiation-induced embrittlement and hardening of reactor pressure vessel (RPV) steels are a factor of concern ...
WEN Haiyi, QUAN Qiwei, YANG Xuanye, ZHAO Wenzeng, ZHANG Simin, WU Yichu, LIU Xiangbing   +6 more
doaj   +1 more source

Positron annihilation lifetime spectroscopy at a superconducting electron accelerator

, 2017
The Helmholtz-Zentrum Dresden-Rossendorf operates a superconducting linear accelerator for electrons with energies up to 35 MeV and average beam currents up to 1.6 mA.
Andreas Wagner, W. Anwand, A. G. Attallah, Gregor Dornberg, Mohamed Elsayed, Dirk Enke, A. Hussein, R. Krause-Rehberg, M. Liedke, K. Potzger, Thu Trang Trinh   +10 more
semanticscholar   +1 more source

Comparison of the free volume sizes and shapes determined from crystallographic and PALS data

Nukleonika, 2015
Two different classes of molecular crystals were investigated. The first group was benzenediols, which are characterized by the same chemical composition but a different organization of their crystallographic structures; all of the compounds from this ...
Tydda Maciej, Jasińska Bożena
doaj   +1 more source

Interactions of Neurodegenerative Disease Positron Emission Tomography Imaging Probe Candidates with the C‐Terminus of α‐Synuclein Fibrils

ChemBioChem, Volume 26, Issue 22, November 17, 2025.
Binding studies of α‐synuclein (αS) fibril ligands using photo‐crosslinking mass spectrometry and Förster resonance energy transfer show that the multiple system atrophy (MSA)‐selective lead, HY‐215, interacts with the αS C‐terminus, unlike Parkinson's disease (PD)‐selective lead, M503. Thus, often‐ignored interactions with the disordered regions of αS
Kyle D. Shaffer, Ryann M. Perez, Marshall G. Lougee, Vinayak V. Pagar, Hee Jong Kim, Ho Young Kim, Benjamin A. Garcia, Robert H. Mach, E. James Petersson   +8 more
wiley   +1 more source