Results 141 to 150 of about 2,064,816 (279)

Dose, exposure time, and resolution in Serial X-ray Crystallography

, 2007
The resolution of X-ray diffraction microscopy is limited by the maximum dose that can be delivered prior to sample damage. In the proposed Serial Crystallography method, the damage problem is addressed by distributing the total dose over many identical ...
Chapman, H. N., Doak, R. B., Fromme, P., Hembree, G., Howells, M., Rez, P., Schmidt, K., Shapiro, D., Spence, J. C. H., Starodub, D., Weierstall, U.   +10 more
core   +1 more source

Photochemical Preparation of (Aza‐)Indolines: Diastereoselective Synthesis and Polarity Reversal Strategy

Advanced Synthesis &Catalysis, Accepted Article.
Herein, we present the first light‐mediated, diastereoselective de novo synthesis for 2,3‐substituted indolines, a privileged scaffold in pharmaceuticals. The protocol was tested with various aryl and alkyl groups, maintaining high yields up to 85% across different substituents.
Julian Melder, Maxi Heldner, Julia Svetličić, Abdinasir Adow, Frank Rominger, Matthias Rudolph, Guenter Helmchen, A. Stephen K. Hashmi   +7 more
wiley   +1 more source

Structural snapshot of a bacterial phytochrome in its functional intermediate state

Nature Communications, 2018
Phytochromes are photoreceptors that are present in plants, bacteria and fungi. Here the authors present crystal structures of the phytochrome Agp2 from Agrobacterium fabrum in the parent Pfr state as well as a functional Meta-F intermediate and discuss ...
Andrea Schmidt, Luisa Sauthof, Michal Szczepek, Maria Fernandez Lopez, Francisco Velazquez Escobar, Bilal M. Qureshi, Norbert Michael, David Buhrke, Tammo Stevens, Dennis Kwiatkowski, David von Stetten, Maria Andrea Mroginski, Norbert Krauß, Tilman Lamparter, Peter Hildebrandt, Patrick Scheerer   +15 more
doaj   +1 more source

1-(2,4-Dinitrophenyl)-2-[(E)-(3,4,5-trimethoxybenzylidene)]hydrazine

Acta Crystallographica Section E, 2014
Molecules of the title compound, C16H16N4O7, are not planar with a dihedral angle of 5.50 (11)° between the substituted benzene rings. The two meta-methoxy groups of the 3,4,5-trimethoxybenzene moiety lie in the plane of the attached ring [Cmethyl–O–C–C ...
Suchada Chantrapromma, Pumsak Ruanwas, Nawong Boonnak, C. S. Chidan Kumar, Hoong-Kun Fun   +4 more
doaj   +1 more source

Coherent X-ray Diffraction Imaging of Nanostructures [PDF]

arXiv, 2013
We present here an overview of Coherent X-ray Diffraction Imaging (CXDI) with its application to nanostructures. This imaging approach has become especially important recently due to advent of X-ray Free-Electron Lasers (XFEL) and its applications to the fast developing technique of serial X-ray crystallography.
arxiv  

Advancing Molten Alkali Borate Sorbents for High‐Temperature Carbon Capture by Structural Elucidation of the Ionic‐Oxide Reaction Mechanism

Advanced Sustainable Systems, EarlyView.
The measured infrared spectrum of lithium‐sodium orthoborate ((Li0.5Na0.5)3BO3) is shown by first principle calculations to be made up of contributions originating from the mixed alkali‐metal orthoborate Li5Na4B3O9, pyroborate Li2Na2B2O5 and carbonate LiNaCO3, showcasing the important effect of carbon dioxide absorption on the structural make‐up of the
David Unnervik, Takuya Harada
wiley   +1 more source

2-[(E)-2-(4-Ethoxyphenyl)ethenyl]-1-methylquinolinium 4-fluorobenzenesulfonate

Acta Crystallographica Section E, 2014
In the structure of the title salt, C20H20NO+·C6H4FO3S−, the 4-(ethoxyphenyl)ethenyl unit is disordered over two positions with a refined site-occupancy ratio of 0.610 (6):0.390 (6). The cation is nearly planar, the dihedral angle between the quinolinium
Hoong-Kun Fun, Thawanrat Kobkeatthawin, Pumsak Ruanwas, Ching Kheng Quah, Suchada Chantrapromma   +4 more
doaj   +1 more source

Analytical Description of Nanowires: Morphing Wurtzite Structure Cross Sections to Match Arbitrary Convex Shapes

Advanced Theory and Simulations, EarlyView.
Analytic morphing of wurtzite nanowire cross sections to arbitrary shapes yields numbers of nanowire atoms, of bonds between these and of nanowire interface bonds, plus the nanowire cross section area. The ratios of above variables help to interpret any spectroscopic nanowire data which depend on diameter and cross section shape, and can be applied to ...
Dirk König, Sean C. Smith
wiley   +1 more source

On X-ray scattering model for single particles, Part II: Beyond protein crystallography [PDF]

arXiv, 2014
Emerging coherent X-ray scattering patterns of single-particles have shown dominant morphological signatures in agreement with predictions of the scattering model used for conventional protein crystallography. The key question is if and to what extent these scattering patterns contain volumetric information, and what model can retrieve it.
arxiv  

Isolation, X-ray Structures, and Electronic Spectra of Reactive Intermediates in Friedel−Crafts Acylations [PDF]

, 2005
Reactive intermediates in the Friedel−Crafts acylation of aromatic donors are scrutinized upon their successful isolation and X-ray crystallography at very low temperatures.
Davlieva, M. G., Kochi, Jay K., Lindeman, Sergey V., Neretin, I. S.   +3 more
core   +1 more source