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ID31989933Published Date2020-04-01JournalApplied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 2020-04-01, Volume 158
The SnOGe/Ga generator system is widely used in medical imaging to provide a regular supply of the radionuclide Ga (T = 68.3 min) for positron emission tomography (PET). These generators are also used to supply Ga for the fabrication of tracer particles for application in positron emission particle tracking (PEPT). The tracer particles are fabricated by radiolabelling ion exchange resins such as Purolite NRW100 with Ga; however, contaminants from the degradation of the SnO column over time in…
Publication
IDDOI:10.1115/1.4044910Published Date2020-04-01JournalJournal of Nuclear Engineering and Radiation Science, 2020-04-01, Volume 6
Abstract In the pebble-bed high-temperature reactor under construction in China, called the HTR-PM, the spherical fuel elements continuously flow downward in the cylindrical core. The burnup of each pebble is checked at the core outlet and, according to the achieved burnup level, the pebble might be disposed or reinserted into the upper section of the core. Upon reinsertion, each pebble is radially distributed in a random manner and, according to its downward path, faces different burnup cond…
Publication
ID32188960Published Date2020-03-19JournalEnvironmental science. Processes & impacts, 2020-03-19
Fresh soot particles are generally hydrophobic, however, particle hydrophilicity can be increased through atmospheric aging processes. At present little is known on how particle chemical composition and hydrophilicity change upon atmospheric aging and associated uncertainties governing the ice cloud formation potential of soot. Here we sampled two propane flame soots referred to as brown and black soot, characterized as organic carbon rich and poor, respectively. We investigated how the ice n…
Publication
ID32189111Published Date2020-03-18JournalHistochemistry and cell biology, 2020-03-18
In this article, we present an X-ray tomographic imaging method that is well suited for pulmonary disease studies in animal models to resolve the full pathway from gas intake to gas exchange. Current state-of-the-art synchrotron-based tomographic phase-contrast imaging methods allow for three-dimensional microscopic imaging data to be acquired non-destructively in scan times of the order of seconds with good soft tissue contrast. However, when studying multi-scale hierarchically structured ob…
Publication
ID32078310Published Date2020-03-18JournalJournal of the American Chemical Society, 2020-03-18, Volume 142
The [FeS]-RsrR gene transcription regulator senses the redox status in bacteria by modulating DNA binding, while its cluster cycles between +1 and +2 states-only the latter binds DNA. We have previously shown that RsrR can undergo remarkable conformational changes involving a 100° rotation of tryptophan 9 between exposed () and buried () states. Here, we have used the chemical modification of Trp9, site-directed mutagenesis, and crystallographic and computational chemical studies to show that…
Publication
ID32187588Published Date2020-03-18JournalJournal of physics. Condensed matter : an Institute of Physics journal, 2020-03-18
The Dzyaloshinskii-Moriya interaction (DMI) is believed to be operative in low-symmetry crystal structures lacking space-inversion symmetry. However, already in 1963, Arrott pointed out that even in a high-symmetry lattice, where the DMI would normally vanish, this interaction is present in the vicinity of any lattice defect. Based on these considerations and recent theoretical work, first experimental studies of the impact of the DMI on the spin-polarized magnetic small-angle neutron scatter…
Publication
IDDOI:10.1177/1744259120908967Published Date2020-03-16JournalJournal of Building Physics, 2020-03-16
Masonry is one of the most common building envelope systems in the world, providing an excellent water protection solution against rain. Water transport in masonry walls composed of bricks and mortar joints can be strongly affected by the nature of the interface between brick and mortar. In this study, two-dimensional water uptake experiments and numerical simulations are performed to study the effect of interface resistance on moisture transport in masonry samples with horizontal and vertica…
Publication
ID32161128Published Date2020-03-11JournalProceedings of the National Academy of Sciences of the United States of America, 2020-03-11
The role of the crystal lattice for the electronic properties of cuprates and other high-temperature superconductors remains controversial despite decades of theoretical and experimental efforts. While the paradigm of strong electronic correlations suggests a purely electronic mechanism behind the insulator-to-metal transition, recently the mutual enhancement of the electron-electron and the electron-phonon interaction and its relevance to the formation of the ordered phases have also been em…
Publication
ID32155594Published Date2020-03-10JournalPhysics in medicine and biology, 2020-03-10
Delivery times of intensity-modulated proton therapy (IMPT) can be shortened by reducing the number of spots in the treatment plan, but this may affect clinical plan delivery. Here, we assess the experimental deliverability, accuracy and time reduction of spot-reduced treatment planning for a clinical case, as well as its robustness. For a single head-and-neck cancer patient, a spot-reduced plan was generated and compared with the conventional clinical plan. The number of proton spots was red…
Publication
ID32144249Published Date2020-03-06JournalNature communications, 2020-03-06, Volume 11
High-energy-density lithium-rich materials are of significant interest for advanced lithium-ion batteries, provided that several roadblocks, such as voltage fade and poor energy efficiency are removed. However, this remains challenging as their functioning mechanisms during first cycle are not fully understood. Here we enlarge the cycling potential window for LiNiMnCoO electrode, identifying novel structural evolution mechanism involving a structurally-densified single-phase A' formed under h…
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Patents: 370

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