Spectrum manipulation of a dual-stop-band meta material terahertz filter based on unit cell dimension changes

2019 ◽  
Vol 15 (3) ◽  
pp. 174-178
Author(s):  
Wei Xu ◽  
Hai-yang Guo ◽  
Xiu-han Li ◽  
Dong-dong Xu ◽  
Guo-wu Wei ◽  
...  
Keyword(s):  
Stop Band ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Cell Dimension ◽  
Terahertz Filter

Structural Study of the Disordered RECd6 Quasicrystal Approximants (RE = Tb, Ho, Er, Tm and Lu)

2006 ◽  
Vol 61 (6) ◽  
pp. 644-649 ◽  
Author(s):  
Shu Ying Piao ◽  
Cesar P. Gömez ◽  
Sven Lidin
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Structural Study ◽  
Diffraction Data ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Cell Dimension ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Types

The crystal structures of approximants RECd6 (RE = Tb, Ho, Er, Tm and Lu) have been refined from single crystal X-ray diffraction data. This work is a continuation of a previous study of MCd6 approximants [1] in which the different types of disorder of the central Cd4 tetrahedra located in the dodecahedral cavities were examined. The structures of the title compounds are all similar to GdCd6 and disorder was observed in all these compounds. There is a correlation between the anisotropic displacement parameter and the unit cell dimension

Cubic crystals of phosphopantetheine adenylyltransferase from Escherichia coli

1999 ◽  
Vol 55 (6) ◽  
pp. 1226-1228 ◽  
Author(s):  
Tina Izard ◽  
Arie Geerlof ◽  
Ann Lewendon ◽  
John J. Barker
Keyword(s):  
Escherichia Coli ◽  
Packing Density ◽  
Coenzyme A ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Cell Dimension ◽  
Asymmetric Unit ◽  
Cubic Crystals ◽  
Space Group ◽  
Better Than

Phosphopantetheine adenylyltransferase (PPAT, E.C. 2.7.7.3) catalyzes the penultimate step in coenzyme A (CoA) biosynthesis, transferring an adenylyl group from ATP to 4′-phosphopantetheine, and forming dephospho-CoA. Cubic crystals of native PPAT from Escherichia coli as well as PPAT in complex with its substrates were obtained. The crystals belong to space group I23 or I213 with unit-cell dimension a = 135.5 Å. The crystals diffract to better than 1.8 Å resolution on a Cu Kα rotating-anode generator. The asymmetric unit is likely to contain two molecules, corresponding to a packing density of 2.9 Å3 Da−1.

scholarly journals Impact of Machining and Phase Composition Change of Titanium Alloyed with Molybdenum

2022 ◽  
Author(s):  
B. Kodess
Keyword(s):  
Phase Composition ◽  
Single Crystal ◽  
High Precision ◽  
Orthorhombic Phase ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Cell Dimension ◽  
Composition Change ◽  
X Ray

Abstract. The titanium samples alloyed with molybdenum and aluminum are used to conduct full high-precision X-ray experiments enabling to determine the characteristic of the atomic interrelations - the unit cell dimension, and to establish the phase components of the doped single crystal. An orthorhombic phase is found, the volume of which increases after the deformation impact.

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