Results 1 to 10 of about 484,403 (316)

Fluorescent Bis(guanidine) Copper Complexes as Precursors for Hydroxylation Catalysis

Inorganics, 2018
Bis(guanidine) copper complexes are known for their ability to activate dioxygen. Unfortunately, until now, no bis(guanidine) copper-dioxygen adduct has been able to transfer oxygen to substrates.
Florian Strassl, Alexander Hoffmann, Benjamin Grimm-Lebsanft, Dieter Rukser, Florian Biebl, Mai Anh Tran, Fabian Metz, Michael Rübhausen, Sonja Herres-Pawlis   +8 more
doaj   +1 more source

Copernican Crystallography

, 1991
Redundancies are pointed out in the widely used extension of the crystallographic concept of Bravais class to quasiperiodic materials. Such pitfalls can be avoided by abandoning the obsolete paradigm that bases ordinary crystallography on microscopic ...
Mermin, N. David
core   +2 more sources

What is a crystal? [PDF]

, 2007
Almost 25 years have passed since Shechtman discovered quasicrystals, and 15 years since the Commission on Aperiodic Crystals of the International Union of Crystallography put forth a provisional definition of the term crystal to mean ``any solid having ...
Baake M., de Bruijn N. G., Gardner M., Gähler F., Hargittai I., International Union, Levine D., Penrose R.   +7 more
core   +4 more sources

Quasi-Periodic Crystals—The Long Road from Discovery to Acceptance

Rambam Maimonides Medical Journal, 2013
[Extract] Three surprising discoveries on the nature of matter and its properties were published in the mid-1980s. All these discoveries led to Nobel prizes. The first discovery was in 1985, when fullerenes were discovered by Robert F.
Daniel Schechtman
doaj   +1 more source

Namdinator – automatic molecular dynamics flexible fitting of structural models into cryo-EM and crystallography experimental maps

bioRxiv, 2018
Model building into experimental maps is a key element of structural biology, but can be both time consuming and error-prone. Here we present Namdinator, an easy-to-use tool that enables the user to run a Molecular Dynamics Flexible Fitting (MDFF ...
R. Kidmose, Jonathan Juhl, P. Nissen, T. Boesen, J. Karlsen, B. P. Pedersen   +5 more
semanticscholar   +1 more source

Distinguishing Biologically Controlled Calcareous Biomineralization in Fossil Organisms Using Electron Backscatter Diffraction (EBSD)

Frontiers in Earth Science, 2018
Although carbonate-precipitating cyanobacteria are ubiquitous in aquatic ecosystems today, the criteria used to identify them in the geological record are subjective and rarely testable.
Jan-Filip Päßler, Emilia Jarochowska, Michel Bestmann, Axel Munnecke   +3 more
doaj   +1 more source

Influence of Terminal Functionality on the Crystal Packing Behaviour and Cytotoxicity of Aromatic Oligoamides

Frontiers in Chemistry, 2021
The synthesis and characterization of three aromatic oligoamides, constructed from the same pyridyl carboxamide core but incorporating distinct end groups of acetyl (Ac) 1, tert-butyloxycarbonyl (Boc) 2 and amine 3 is reported.
Pierre Delfosse, Colin C. Seaton, Louise Male, Rianne M. Lord, Rianne M. Lord, Sarah J. Pike, Sarah J. Pike   +6 more
doaj   +1 more source

Spikes in Cosmic Crystallography

, 2002
If the universe is multiply connected and small the sky shows multiple images of cosmic objects, correlated by the covering group of the 3-manifold used to model it.
A. BERNUI, A. F. F. TEIXEIRA, G. I. GOMERO, Gomero G. I., Lehoucq R., Lehoucq R., M. J. REBOUÇCAS, Zeldovich Ya. B.   +7 more
core   +1 more source

Radiation damage and dose limits in serial synchrotron crystallography at cryo- and room temperatures

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance Macromolecular X-ray crystallography (MX) is the most prolific structure determination method in structural biology but is limited by radiation damage.
E. de la Mora, N. Coquelle, C. Bury, M. Rosenthal, J. Holton, I. Carmichael, E. Garman, M. Burghammer, J. Colletier, M. Weik   +9 more
semanticscholar   +1 more source

Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure

Компьютерная оптика
The modern demands for miniaturization of optoelectronic devices, in particular, for the UV range, are inextricably linked with the improvement of fabrication technologies for the corresponding photonic nano/micro objects and the study of their radiative
L.A. Zadorozhnaya, A.P. Tarasov, A.S. Lavrikov, V.M. Kanevsky   +3 more
doaj   +1 more source