Results 31 to 40 of about 408,933 (280)

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

Electron crystallography [PDF]

Acta Crystallographica Section A Foundations of Crystallography, 1996
The idea of solving unknown crystal structures from experimental electron-diffraction intensities and high-resolution electron micrographs has remained a controversial topic in the 60 year history of electron crystallography. In this review it will be shown that the application of modern direct phasing techniques, familiar to X-ray crystallographers ...
openaire   +2 more sources

Structure and mutation of deoxypodophyllotoxin synthase (DPS) from Podophyllum hexandrum

Frontiers in Catalysis, 2023
Deoxypodophyllotoxin synthase (DPS) is a 2-oxoglutarate (2-OG) dependent non-heme iron (II) dioxygenase that catalyzes the stereoselective ring-closing carbon-carbon bond formation of deoxypodophyllotoxin from the aryllignan (−)-yatein ...
Zoe Ingold, Zoe Ingold, Gideon Grogan, Benjamin R. Lichman   +3 more
doaj   +1 more source

Gender and Library of Mineralogy

Crystals, 2022
Few would expect women to feature often in the literature on minerology from the 15th through the 19th centuries, the recorded history of science being what it is.
Bart Kahr
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

Solvent content of protein crystals from diffraction intensities by Independent Component Analysis [PDF]

, 2003
An analysis of the protein content of several crystal forms of proteins has been performed. We apply a new numerical technique, the Independent Component Analysis (ICA), to determine the volume fraction of the asymmetric unit occupied by the protein ...
A. Lamura, Authier, Cedergren-Zeppezauer, Comon, Cover, D. Siliqi, Dauter, Dauter, G. Nico, Giacovazzo, Glover, Hecht, Hecht, Hofmann, Huber, Hyvärinen, Hyvärinen, Hyvärinen, Jiang, Jones, Jutten, Kantardjeff, Kostrewa, Kostrewa, Massimo Ladisa, Matak-Vinkovic, Mattevi, Matthews, Moews, Moore, Morris, Papoulis, Spallarossa, Toro, Urzhumtsev   +34 more
core   +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

The first mononuclear PtIII complex. Molecular structures of (NBu4)[PtIII(C6Cl5)4] and of its parent compound {NBu4}2[PtII(C6Cl5)4]·2CH2Cl2 [PDF]

, 1984
(NBu4)[PtIII(C6Cl5)4], fully characterized by crystallographic, spectral, and magnetic measurements has been isolated by oxidation with halogens or TICl3 of the parent compound (NBu4)2[PtII(C6CL5)4], which has also been analysed by X-ray ...
Bau, Robert, Forniés, Juan, Menjón, Babil, Sünkel, Karlheinz, Tomás, Milagros, Usón, Rafael   +5 more
core   +1 more source

Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM

Nanomaterials, 2022
The hampered kinetics of reactive hydride composites (RHCs) in hydrogen storage and release, which limits their use for extensive applications in hydrogen storage S1and energy conversion, can be improved using additives.
Ou Jin, Yuanyuan Shang, Xiaohui Huang, Xiaoke Mu, Dorothée Vinga Szabó, Thi Thu Le, Stefan Wagner, Christian Kübel, Claudio Pistidda, Astrid Pundt   +9 more
doaj   +1 more source

Semax, a Copper Chelator Peptide, Decreases the Cu(II)-Catalyzed ROS Production and Cytotoxicity of aβ by Metal Ion Stripping and Redox Silencing

Bioinorganic Chemistry and Applications
Alzheimer’s disease (AD) is the most common neurodegenerative disorder associated with cognitive decline and loss of memory. It is postulated that the generation of reactive oxygen species (ROS) in Fenton-like reaction connected with Cu(II)/Cu(I) redox ...
Marianna Flora Tomasello, Maria Carmela Di Rosa, Irina Naletova, Michele Francesco Maria Sciacca, Alessandro Giuffrida, Giuseppe Maccarrone, Francesco Attanasio   +6 more
doaj   +1 more source