OpenAccess

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2024-04-06
18:46

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2024-03-28
15:59
OpenAccess [PUBDB-2024-01298] Journal Article
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Neodymium acetate as a contrast agent for X-ray phase-contrast tomography
Purpose: X-ray phase-contrast tomography (XPCT) is a non-destructive, three-dimensional imaging modality that provides higher contrast in soft tissue than absorption-based CT and allows one to cover the cytoarchitecture from the centi- and millimeter scale down to the nanoscale. To further increase contrast and resolution of XPCT, for example, in view of addressing connectivity issues in the central nervous system (CNS), metal staining is indispensable. [...]
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2024-03-28
15:55
OpenAccess [PUBDB-2024-01297] Journal Article
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Imaging of excised cochleae by micro-CT: staining, liquid embedding, and image modalities
Purpose:Assessing the complex three-dimensional (3D) structure of the cochlea is crucial to understanding the fundamental aspects of signal transduction in the inner ear and is a prerequisite for the development of novel cochlear implants. X-ray phase-contrast computed tomography offers destruction-free 3D imaging with little sample preparation, thus preserving the delicate structure of the cochlea. [...]
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2024-03-28
15:43
OpenAccess [PUBDB-2024-01296] Journal Article
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Stabilization Of The CN$_3$$^{5−}$ Anion In Recoverable High‐pressure Ln$_3$O$_2$(CN$_3$) (Ln=La, Eu, Gd, Tb, Ho, Yb) Oxoguanidinates
Angewandte Chemie 135(47), e202311516 () [10.1002/ange.202311516]  GO
A series of isostructural Ln$_3$O$_2$(CN$_3$) (Ln=La, Eu, Gd, Tb, Ho, Yb) oxoguanidinates was synthesized under high-pressure (25–54 GPa) high-temperature (2000–3000 K) conditions in laser-heated diamond anvil cells. The crystal structure of this novel class of compounds was determined via synchrotron single-crystal X-ray diffraction (SCXRD) as well as corroborated by X-ray absorption near edge structure (XANES) measurements and density functional theory (DFT) calculations [...]
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2024-03-28
15:35
OpenAccess [PUBDB-2024-01295] Journal Article
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Interfacial alloying between lead halide perovskite crystals and hybrid glasses
The stellar optoelectronic properties of metal halide perovskites provide enormous promise for next-generation optical devices with excellent conversion efficiencies and lower manufacturing costs. However, there is a long-standing ambiguity as to whether the perovskite surface/interface (e.g [...]
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2024-03-28
15:17
OpenAccess [PUBDB-2024-01294] Journal Article
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Oxidation of iron by giant impact and its implication on the formation of reduced atmosphere in the early Earth
Science advances 9(50), eadi6096 () [10.1126/sciadv.adi6096]  GO
Giant impact–driven redox processes in the atmosphere and magma ocean played crucial roles in the evolution of Earth. However, because of the absence of rock records from that time, understanding these processes has proven challenging [...]
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2024-03-28
15:04
OpenAccess [PUBDB-2024-01293] Journal Article
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Structure Sensitivity of CO$_2$ Hydrogenation on Ni Revisited
Despite the large number of studies on the catalytic hydrogenation of CO$_2$ to CO and hydrocarbons by metal nanoparticles, the nature of the active sites and the reaction mechanism have remained unresolved. This hampers the development of effective catalysts relevant to energy storage [...]
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2024-03-28
13:38
OpenAccess [PUBDB-2024-01292] Journal Article
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Alloying and oxidation of PdAu thin films
The relation between catalytic activity and the presence of oxides on the catalyst’s surface has proven very complex, especially in the case of methane oxidation over Pd. While the metallic Pd surface and a thin, but at least two atomic layers thick, oxide film has been found catalytically active, a single-layer surface oxide or a too thick oxide film are both low-active [...]
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2024-03-27
12:06
OpenAccess [PUBDB-2024-01286] Dissertation / PhD Thesis
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Leaving No Matter Unturned
Humboldt-Universität zu Berlin 313 pp. () [10.18452/28362] = Dissertation, Humboldt University of Berlin, 2023  GO
Various astrophysical observations point towards an as-of-yet unexplained, mainly gravitationally interacting type of matter. If this matter, called Dark Matter, is an elementary particle, it could be produced in particle collisions at the Large Hadron Collider [...]
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2024-03-27
11:37
OpenAccess [PUBDB-2024-01283] Contribution to a book

Particle physics: physics beyond the Standard Model
EPS Grand Challenges - Physics for Society in the Horizon 2050 London : IOP Publishing Ltd. 16 pp. () [10.1088/978-0-7503-6342-6]  GO
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