Neutron diffraction facilities for structural studies of crystals and fibres
نویسندگان
چکیده
منابع مشابه
Neutron diffraction from sound-excited crystals
A longitudinal sound wave modulates the regular arrangement of the atomic planes of a crystal in two ways: first, the spacing between the atomic planes is modified in the regions of compression and expansion introducing a macroscopic strain and, second, the lattice planes acquire a velocity in the oscillating strain field. Bragg reflection in a strained crystal maintains the energy of the radia...
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Crystallization and preliminary neutron-diffraction measurements of wild-type variant Val58-->Ile of the Escherichia coli trp repressor are reported. A vapor-diffusion chamber suitable for initial protein-solution Volumes in the range 0.2-0.5 ml was used to grow cube-shaped crystals with edge dimensions in the range 0.8-1.4 mm. Neutron Laue measurements to a nominal resolution of 2.1 A were rec...
متن کاملWill gradient crystals become available for neutron diffraction?
We report on a novel approach to grow massive Si 1 _,Gex crystals by a low pressure chemical vapor deposition technique . In particular, we attempt to synthesize gradient crystals suited as monochromators in neutron(and X-ray) scattering. Structural parameters for a large number of Si t _xGex deposits have been analysed by various techniques from materials science and representative examples ar...
متن کاملsimulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
postnatal studies of bats (pipistrellus kuhlii and miniopterus schreibersii) & histomorphology and histochemistry studies of organs and diseases of (neurergus microspilotus and n. kaiseri)
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 2006
ISSN: 0108-7673
DOI: 10.1107/s0108767306097704