Results 21 to 30 of about 2,411 (230)

Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source

IUCrJ, 2021
X-ray photon correlation spectroscopy (XPCS) is a routine technique to study slow dynamics in complex systems at storage-ring sources. Achieving nanosecond time resolution with the conventional XPCS technique is, however, still an experimentally ...
Wonhyuk Jo, Fabian Westermeier, Rustam Rysov, Olaf Leupold, Florian Schulz, Steffen Tober, Verena Markmann, Michael Sprung, Allesandro Ricci, Torsten Laurus, Allahgholi Aschkan, Alexander Klyuev, Ulrich Trunk, Heinz Graafsma, Gerhard Grübel, Wojciech Roseker   +15 more
doaj   +1 more source

Microsecond hydrodynamic interactions in dense colloidal dispersions probed at the European XFEL

IUCrJ, 2021
Many soft-matter systems are composed of macromolecules or nanoparticles suspended in water. The characteristic times at intrinsic length scales of a few nanometres fall therefore in the microsecond and sub-microsecond time regimes.
Francesco Dallari, Avni Jain, Marcin Sikorski, Johannes Möller, Richard Bean, Ulrike Boesenberg, Lara Frenzel, Claudia Goy, Jörg Hallmann, Yoonhee Kim, Irina Lokteva, Verena Markmann, Grant Mills, Angel Rodriguez-Fernandez, Wojciech Roseker, Markus Scholz, Roman Shayduk, Patrik Vagovic, Michael Walther, Fabian Westermeier, Anders Madsen, Adrian P. Mancuso, Gerhard Grübel, Felix Lehmkühler   +23 more
doaj   +1 more source

Recognition of DNA damage by XPC coincides with disruption of the XPC–RAD23 complex [PDF]

Journal of Cell Biology, 2012
The recognition of helix-distorting deoxyribonucleic acid (DNA) lesions by the global genome nucleotide excision repair subpathway is performed by the XPC–RAD23–CEN2 complex. Although it has been established that Rad23 homologs are essential to protect XPC from proteasomal degradation, it is unclear whether RAD23 proteins have a direct role in the ...
S. Bergink, W. Toussaint, M. S. Luijsterburg, C. Dinant, S. Alekseev, J. H. J. Hoeijmakers, N. P. Dantuma, A. B. Houtsmuller, W. Vermeulen   +8 more
openaire   +2 more sources

The Effect of Intensity Fluctuations on Sequential X-ray Photon Correlation Spectroscopy at the X-ray Free Electron Laser Facilities

Crystals, 2020
How materials evolve at thermal equilibrium and under external excitations at small length and time scales is crucial to the understanding and control of material properties. X-ray photon correlation spectroscopy (XPCS) at X-ray free electron laser (XFEL)
Yue Cao, Dina Sheyfer, Zhang Jiang, Siddharth Maddali, Hoydoo You, Bi-Xia Wang, Zuo-Guang Ye, Eric M. Dufresne, Hua Zhou, G. Brian Stephenson, Stephan O. Hruszkewycz   +10 more
doaj   +1 more source

Direct measurement of Stokes–Einstein diffusion of Cowpea mosaic virus with 19 µs-resolved XPCS

Journal of Synchrotron Radiation, 2022
Brownian motion of Cowpea mosaic virus (CPMV) in water was measured using small-angle X-ray photon correlation spectroscopy (SA-XPCS) at 19.2 µs time resolution. It was found that the decorrelation time τ(Q) = 1/DQ2 up to Q = 0.091 nm−1. The hydrodynamic
Kacper Switalski, Jingyu Fan, Luxi Li, Miaoqi Chu, Erik Sarnello, Pete Jemian, Tao Li, Qian Wang, Qingteng Zhang   +8 more
doaj   +1 more source

Speckle contrast of interfering fluorescence X-rays

Journal of Synchrotron Radiation, 2023
With the development of X-ray free-electron lasers (XFELs), producing pulses of femtosecond durations comparable with the coherence times of X-ray fluorescence, it has become possible to observe intensity–intensity correlations due to the interference of
Fabian Trost, Kartik Ayyer, Dominik Oberthuer, Oleksandr Yefanov, Saša Bajt, Carl Caleman, Agnes Weimer, Artur Feld, Horst Weller, Sébastien Boutet, Jason Koglin, Nicusor Timneanu, Joachim von Zanthier, Ralf Röhlsberger, Henry N. Chapman   +14 more
doaj   +1 more source

From Molecules to Modules: Advanced Characterization of Membrane Systems. [PDF]

Adv Mater
Membrane technologies can enhance the efficiency and selectivity of chemical separations in energy‐water systems. Improving our understanding and design of separation membranes will require studying their properties at the molecular scale, mesoscale, and macroscale. This perspective highlights advanced characterization techniques for revealing membrane
Zhu Y, Booth AJ, Eatman JG, Kim MA, Liu Y, Sarkar B, Sengupta B, Yue X, Amanchukwu CV, Darling SB, Elam JW, Fenter P, Liu C, Hatzell KB.   +13 more
europepmc   +2 more sources

The PERCIVAL detector: first user experiments

Journal of Synchrotron Radiation, 2023
The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free-electron laser, holographic imaging at a ...
J. Correa, M. Mehrjoo, R. Battistelli, F. Lehmkühler, A. Marras, C. B. Wunderer, T. Hirono, V. Felk, F. Krivan, S. Lange, I. Shevyakov, V. Vardanyan, M. Zimmer, M. Hoesch, K. Bagschik, N. Guerrini, B. Marsh, I. Sedgwick, G. Cautero, L. Stebel, D. Giuressi, R. H. Menk, A. Greer, T. Nicholls, W. Nichols, U. Pedersen, P. Shikhaliev, N. Tartoni, H. J. Hyun, S. H. Kim, S. Y. Park, K. S. Kim, F. Orsini, F. J. Iguaz, F. Büttner, B. Pfau, E. Plönjes, K. Kharitonov, M. Ruiz-Lopez, R. Pan, S. Gang, B. Keitel, H. Graafsma   +42 more
doaj   +1 more source

Sequence of the mouse XPC cDNA and genomic structure of the human XPC gene [PDF]

Nucleic Acids Research, 1996
The full length-mouse XPC cDNA contains a 2703 bp orf which encodes a polypeptide containing 900 amino acids. Overall, there is 75% identity in nucleotide sequence and 73% identity in amino acid sequence between mouse and human genes. The C-terminal half is more conserved (80%) than the N-terminal half (65%).
L, Li, C, Peterson, R, Legerski
openaire   +2 more sources

Machine Learning for analysis of speckle dynamics: quantification and outlier detection

Physical Review Research, 2022
X-ray photon correlation spectroscopy (XPCS) provides an understanding of complex dynamics in materials that are tied to their synthesis, properties, and behaviors.
Tatiana Konstantinova, Lutz Wiegart, Maksim Rakitin, Anthony M. DeGennaro, Andi M. Barbour   +4 more
doaj   +1 more source