Results 21 to 30 of about 6,581,018 (264)

Time Resolved Two Dimensional X-Ray Densitometry of a Two Phase Flow Downstream of a Ventilated Cavity [PDF]

, 2013
To measure the void fraction distribution in gas-liquid flows, a two-dimensional x-ray densitometry system was developed. This system is capable of acquiring a two-dimensional projection with a 225 cm2 area of measurement through 21 cm of water.
GABILLET, Céline, PAIK, Bu-Geun, MAKIHARJU, Simo A, Ceccio, Steven L., PERLIN, Marc, CHANG, Natasha A, Mäkiharju, Simo A., Chang, Natasha A., CECCIO, Steven L   +8 more
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The dependence of X-ray elastic constants with respect to the penetration depth [PDF]

, 2023
X-ray diffraction techniques are widely used to estimate stresses within polycrystalline materials. The application of these techniques requires the knowledge of the X-ray elastic constants relating the lattice strains to the stress state.
MAREAU, Charles
core   +1 more source

Crystal structure and theoretical studies of two π-conjugated fused-ring chalcones: (E)-1-(anthracen-9-yl)-3-(9-ethyl-9H-carbazol-3-yl)prop-2-en-1-one and (E)-1-(anthracen-9-yl)-3-[4-(9H-carbazol-9-yl)phenyl]prop-2-en-1-one

Acta Crystallographica Section E: Crystallographic Communications, 2018
The title chalcones, C31H23NO and C35H23NO, were synthesized via Claisen–Schmidt condensation reactions. Both structures were solved and refined using single-crystal X-ray diffraction data and optimized at the ground state using the density functional ...
Dian Alwani Zainuri, Ibrahim Abdul Razak, Suhana Arshad   +2 more
doaj   +1 more source

The effect of the fused-ring substituent on anthracene chalcones: crystal structural and DFT studies of 1-(anthracen-9-yl)-3-(naphthalen-2-yl)prop-2-en-1-one and 1-(anthracen-9-yl)-3-(pyren-1-yl)prop-2-en-1-one

Acta Crystallographica Section E: Crystallographic Communications, 2018
The title chalcone compounds, C27H18O (I) and C33H20O (II), were synthesized using a Claisen–Schmidt condensation. Both compounds display an s-trans configuration of the enone moiety.
Dian Alwani Zainuri, Ibrahim Abdul Razak, Suhana Arshad   +2 more
doaj   +1 more source

Micro-CT Study of Mongolian Gerbil Humeral Bone After Prolonged Spaceflight Based on a New Algorithm for Delimitation of Long-Bone Regions

Frontiers in Physiology, 2021
The Mongolian gerbil displays unique physiological and anatomical features that make this species an attractive object for biological experiments in space.
Yuri S. Krivonosov, Victoria I. Gulimova, Alexey V. Buzmakov, Denis A. Zolotov, Alessia Cedola, Inna Bukreeva, Inna Bukreeva, Victor E. Asadchikov, Sergey V. Saveliev   +8 more
doaj   +1 more source

Ag on Ge(111): 2D X-ray structure analysis of the (Wurzel)3 x (Wurzel)3 superstructure [PDF]

, 1992
We have studied the Ag/Ge(111)(Wurzel)3 x (Wurzel)3 superstructure by grazing-incidence X-ray diffraction. In our structural analysis we find striking similarities to the geometry of Au on Si(111). The Ag atoms form trimer clusters with an Ag-Ag distance
Johnson, Robert L., Le Lay, Guy, Johnson, R. L., Le Lay, G., Grey, F., Feidenhans'l, Robert, Feidenhans'l, R., Dornisch, D., Lay, G. le, Feidenhans'l, Robert Krarup, Johnson, R.L., Schulz, H., Moritz, Wolfgang, Nielsen, M., Nielsen, Morten, Moritz, W.   +15 more
core   +1 more source

Crystal structures of di-μ-chlorido-bis({(E)-5-(ethylamino)-4-methyl-2-[(pyridin-2-yl)diazenyl]phenolato}copper(II)) and chloridobis(1,10-phenanthroline)copper(II) chloride tetrahydrate

Acta Crystallographica Section E: Crystallographic Communications, 2023
The dark-red title complex crystallized from an equimolar methanol solution of (E)-5-(ethylamino)-4-methyl-2-[(pyridin-2-yl)diazenyl]phenol and CuCl2(phen) (phen = 1,10-phenanthroline) as a centrosymmetric dimer, [CuCl(C14H15N4O)]2.
Alex Meier, Mohammad Rasel Mian, Siyu Ou, Scott Lovell, Minae Mure   +4 more
doaj   +1 more source

Crystal structure and optical properties of fused-ring chalcone (E)-3-(anthracen-9-yl)-1-(4-nitrophenyl)prop-2-en-1-one

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compound, C23H15NO3, adopts an s-cis conformation with respect to the ethylene C=C and carbonyl C=O double bonds in the enone unit. The molecule is significantly twisted with a dihedral angle of 48.63 (14)° between the anthracene ring system ...
Muhamad Fikri Zaini, Ibrahim Abdul Razak, Wan Mohd Khairul, Suhana Arshad   +3 more
doaj   +1 more source

Crystal structure and optical spectroscopic analyses of (E)-3-(1H-indol-2-yl)-1-(4-nitrophenyl)prop-2-en-1-one hemihydrate

Acta Crystallographica Section E: Crystallographic Communications, 2018
The asymmetric unit of the title compound, 2C17H12N2O3·H2O comprises two molecules of (E)-3-(1H-indol-2-yl)-1-(4-nitrophenyl)prop-2-en-1-one and a water molecule. The main molecule adopts an s-cis configuration with respect to the C=O and C=C bonds.
Muhamad Fikri Zaini, Ibrahim Abdul Razak, Wan Mohd Khairul, Suhana Arshad   +3 more
doaj   +1 more source

Applications of X-ray crystallography: studies into the structural perturbations of peri-substituted naphthalene derivatives [PDF]

, 2009
The majority of research in this thesis uses X-ray crystallography to investigate the structural features of peri-substituted naphthalene compounds. X-ray crystallography is introduced in chapter one, followed by a discussion on modes of distortion peri ...
Fuller, Amy L.
core   +2 more sources