Results 21 to 30 of about 3,520,724 (372)
THE CRYSTAL STRUCTURE OF STURMANITE [PDF]
The Canadian Mineralogist, 2004 Sturmanite, ideally Ca6Fe 3+ 2(SO4)2.5[B(OH)4](OH)12•25H2O, is trigonal, P31c, Z = 2, with a 11.188(9), c 21.91(7) A, V 2375.1(5) A 3 . The crystal structure has been refined to an R index of 0.079. As in the case of ettringite, two coaxial elements parallel to [001] can be considered as the most distinctive features of sturmanite.
PUSHCHAROVSKY DY +6 more
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Crystal structure of pencycuron [PDF]
Acta Crystallographica Section E Crystallographic Communications, 2015 In the title compound [systematic name: 1-(4-chlorobenzyl)-1-cyclopentyl-3-phenylurea], C19H21ClN2O, which is a urea fungicide, the cyclopentyl ring adopts an envelope conformation, with one of the methylene C atoms adjacent to the C atom bonding to the N atom as the flap. The dihedral angles between the mean planes of the central cyclopentyl ring (all
Jineun Kim +3 more
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A Novel One-Dimensional Porphyrin-Based Covalent Organic Framework
Molecules, 2019 A novel one-dimensional covalent organic framework (COF-K) was firstly designed and synthesized through a Schiff-based reaction from a porphyrin building block and a nonlinear right-angle building block.
Miao Zhang +5 more
doaj +1 more source
Crystal structure of dimethomorph [PDF]
Acta Crystallographica Section E Crystallographic Communications, 2015 In the title compound, C21H22ClNO4[systematic name: (E)-3-(4-chlorophenyl)-3-(3,4-dimethoxyphenyl)-1-(morpholin-4-yl)prop-2-en-1-one], which is the morpholine fungicide dimethomorph, the dihedral angles between the mean planes of the central chlorophenyl and the terminal benzene and morpholine (r.m.s. deviation = 0.2233 Å) rings are 71.74 (6) and 63.65
Jineun Kim +3 more
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Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2022 Synthesis and crystal structures of 1-benzoyl-4-(4-nitrophenyl)piperazine, C17H17N3O3, (I) and 1-(4-bromobenzoyl)-4-phenylpiperazine, C17H17BrN2O, (II) are described.
Sreeramapura D. Archana +4 more
doaj +1 more source
Crystal structures of two furazidin polymorphs revealed by a joint effort of crystal structure prediction and NMR crystallography [PDF]
Acta Cryst. (2020). B76, 322-335, 2020 In this work we present crystal structure determination of two elusive polymorphs of furazidin, an antibacterial agent, employing a combination of crystal structure prediction (CSP) calculations and NMR crystallography approach. Two previously uncharacterized neat crystal forms, one of which has two symmetry independent molecules (form I), whereas the ...
arxiv +1 more source
The crystal structure of cyclin A [PDF]
Structure, 1995 Eukaryotic cell cycle progression is regulated by cyclin dependent protein kinases (CDKs) whose activity is regulated by association with cyclins and by reversible phosphorylation. Cyclins also determine the subcellular location and substrate specificity of CDKs.
N.R. Brown +8 more
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Treatment planning with a 2.5 MV photon beam for radiation therapy
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose The shallow depth of maximum dose and higher dose fall‐off gradient of a 2.5 MV beam along the central axis that is available for imaging on linear accelerators is investigated for treatment of shallow tumors and sparing the organs at risk (OARs) beyond it.
Navid Khaledi +5 more
wiley +1 more source
Crystal structure of metobromuron [PDF]
Acta Crystallographica Section E Crystallographic Communications, 2015 The title compound [systematic name: 3-(4-bromophenyl)-1-methoxy-1-methylurea], C9H11BrN2O2, is a phenylurea herbicide. The dihedral angle between the plane of the urea group and that of the bromophenyl ring is 39.13 (10)°. In the crystal, N—H...O and C—H...O hydrogen bonds and weak C—H...π interactions link adjacent molecules, forming chains along ...
Tae Ho Kim +3 more
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