Results 71 to 80 of about 2,204,696 (317)

Synthesis, Electronic Properties, and X-ray Structural Characterization of Tetrarylbenzo[1,2-\u3cem\u3eb\u3c/em\u3e:4,5-\u3cem\u3eb\u3c/em\u3e′]difuran Cation Radicals [PDF]

, 2008
Electroactive tetraarylbenzo[1,2-b:4,5-b′]difuran (BDF) and model diarylbenzofuran derivatives are synthesized and their structures are established by X-ray crystallography.
Lindeman, Sergey V., Rathore, Rajendra, Shukla, Ruchi, Wadumethrige, Shriya   +3 more
core   +1 more source

Synthesis and coordination chemistry of 2-(di-2-pyridylamino)pyrimidine; structural aspects of spin crossover in an Fe(II) complex [PDF]

, 2012
This paper was accepted on February 26 20122-(Di-2-pyridylamino)pyrimidine (L), a potentially ditopic tetradentate ligand, was synthesized from commercially available di-2-pyridylamine and 2-chloropyrimidine.
Addison, Amoore, Amoore, Antonioli, Atmani, Balzani, Barbour, Bloch, Boujemma Moubaraki, Brooker, Christopher J. Sumby, Domaga?a, Halcrow, Halcrow, Hayami, Janiak, Kaes, Keith S. Murray, Kharasch, Martin, Mosny, Murray, Murray, Neville, Neville, Olguin, Quesada, Quesada, Quesada, Rachel S. Crees, Real, Real, Ross, Ross, Sheldrick, Sumby, Sumby, Sumby, Sumby   +38 more
core   +2 more sources

Rapid sample delivery for megahertz serial crystallography at X-ray FELs

IUCrJ, 2018
Sample delivery is a major challenge to performing serial crystallography experiments at upcoming high-repetition-rate X-ray free-electron lasers. The feasibility of using gas-driven liquid jets for this purpose at the FLASH facility in Hamburg has been ...
M. Wiedorn, S. Awel, A. Morgan, K. Ayyer, Y. Gevorkov, H. Fleckenstein, N. Roth, L. Adriano, R. Bean, K. Beyerlein, Joe P. J. Chen, J. Coe, F. Cruz-Mazo, T. Ekeberg, R. Graceffa, M. Heymann, D. Horke, J. Knoška, V. Mariani, Reza Nazari, D. Oberthür, A. Samanta, R. Sierra, C. Stan, O. Yefanov, D. Rompotis, J. Correa, B. Erk, R. Treusch, J. Schulz, B. Hogue, A. Gañán-Calvo, P. Fromme, J. Küpper, A. Rode, S. Bajt, R. Kirian, H. Chapman   +37 more
semanticscholar   +1 more source

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

Advanced Functional Materials, EarlyView.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda, Jorge Cardenas‐Gamboa, Ding Pei, François Bertran, Leila Noohinejad, Snehashish Chatterjee, Changjiang Yi, Iñigo Robredo, Horst Borrmann, Maia G. Vergniory, Chandra Shekhar, Claudia Felser   +11 more
wiley   +1 more source

Multiple Twinning in Nacre and Aragonite

Advanced Functional Materials, EarlyView.
Electron backscatter diffraction map of a cluster of geologic aragonite, exhibiting single, double, and triple twins. The whole cluster is approximately 2 cm wide. Colors indicate crystal orientations, so that pixels where the a‐, b‐, and c‐axis is perpendicular to the image plane are green, red, and blue, respectively.
Connor A. Schmidt, William O. Nachlas, Bil Schneider, Xiaoming Mao, Eric Tambutté, Alexander A. Venn, Sylvie Tambutté, Pupa U. P. A. Gilbert   +7 more
wiley   +1 more source

A convolutional neural network-based screening tool for X-ray serial crystallography

Journal of Synchrotron Radiation, 2018
Deep learning provides one possible avenue to reduce the data stream generated by serial macromolecular X-ray crystallography. Convolutional neural networks can be trained to recognize the presence or absence of Bragg spots, forming a criterion to veto ...
Tsung-Wei Ke, A. Brewster, Stella X. Yu, D. Ushizima, Chao Yang, N. Sauter   +5 more
semanticscholar   +1 more source

Insight into the Internal Structure of Biogenic, Synthetic and Geological Apatite by Electron Microscopy and X‐Ray Scattering

Advanced Functional Materials, EarlyView.
Apatite occurs in many forms in nature, e.g. in teeth and geological minerals. Internally, biological apatite contains nanocrystals that are also found in synthetically prepared calcium phosphate nanoparticles which are used in biomedicine, e.g. for gene and drug delivery and for bone regeneration. Abstract Calcium phosphate is the inorganic component (
Kathrin Kostka, Oleg Prymak, Kateryna Loza, Matthias Epple   +3 more
wiley   +1 more source

Hemoprotein time‐resolved X‐ray crystallography [PDF]

IUBMB Life, 2008
AbstractIn the last decade the role of structural dynamics in controlling protein function was actively investigated using new and advanced experimental approaches. In particular, time resolved crystallography, despite some practical difficulties, is being used extensively to complement the study of protein structure‐function relationships with ...
M. Milani, M. Nardini, A. Pesce, E. Mastrangelo, M. Bolognesi   +4 more
openaire   +3 more sources

Blind prediction of protein B-factor and flexibility

, 2018
Debye-Waller factor, a measure of X-ray attenuation, can be experimentally observed in protein X-ray crystallography. Previous theoretical models have made strong inroads in the analysis of B-factors by linearly fitting protein B-factors from ...
Bramer, David, Wei, Guo-Wei
core   +1 more source

Crystal structure of CO-bound cytochrome c oxidase determined by serial femtosecond X-ray crystallography at room temperature

Proceedings of the National Academy of Sciences of the United States of America, 2017
Significance A fundamental bioenergetics question is how the redox energy from oxygen reduction in cytochrome c oxidase (CcO) is coupled to proton translocation.
I. Ishigami, N. Zatsepin, Masahide Hikita, C. Conrad, G. Nelson, J. Coe, S. Basu, T. Grant, M. Seaberg, R. Sierra, M. Hunter, P. Fromme, R. Fromme, S. Yeh, D. Rousseau   +14 more
semanticscholar   +1 more source