The structure of 3-deazauracil [2-hydroxy-4-pyridone, C5H5NO2], a modified nucleic acid base, has been studied by high resolution neutron powder diffraction. The accuracy of hydrogen atom parameters has been improved over an earlier single crystal X-ray experiment and the biologically important...
Atom location by channelling-enhanced microanalysis (ALCHEMI) has been applied to a Ti2AlNb compound of composition Ti–23 at.% Al–21 at.% Nb so as to deliver absolute compositions for the three sublattices. These compare well with our own neutron diffraction measurements and with ...
J Knblein,T Neuefeind,F Schneider,... - 《Journal of Molecular Biology》 被引量: 127发表: 1997年 A high‐performance neutron diffractometer for biological crystallography (BIX‐3) macromolecular crystallographyhydrogen‐atom locationneutron imaging plateA high‐performance neutron diffractometer for biolo...
The scientists correlated the various peaks observed in the NMR spectra with the catalysts' reactivity for an oxidation reaction that removes a hydrogen atom from methanol. Next, using computational methods, they predicted which peaks in the NMR spectra corresponded with the specific vanadium oxide geo...
LOCATION ThreeMileIsland,intheSusquehannaRiver,Londonderry Township,DauphinCounty,about10milessouthofHarrisburg, Pennsylvania. FACILITIES 2 TMINuclearUnit1,withacapacityofabout800megawatts, placedinoperationinSeptember,1974: -Commercialoperation-September2,1974 -ReactorandrelatedcomponentssuppliedbyBabcockand Wilcox ...
Ti location in the MFI framework of Ti-Silicalite-1: a neutron powder diffraction study. Lamberti C,Bordiga S,Zecchina A,Artioli G,Marra G,Spanò G. Journal of the American Chemical Society . 2001Carlo Lamberti,Silvia Bordiga,Adriano Zecchina etc.Ti Location in the MFI Framework of Ti-...
sorption/ deuterium atom absorptionnanocrystalline graphiteNeutron diffraction is an important technique for studying the structure of hydride materials. H/D isotopic substitution was employed to observe the location of deuterium atoms in deuterated nano-graphite because the coherent scattering length of ...
Various models for the crystal structure of hydronium jarosite were determined from Rietveld refinements against neutron powder diffraction patterns collected at ambient temperature and also single-crystal X-ray diffraction data. The possibility of a lower symmetry space group for hydronium jarosite that ...
The crystal structure of anhydrous deuterium β-alumina at 4.5°K has been determined by powder neutron diffraction. The location of the deuterium atoms was revealed by Fourier methods associated with a profile analysis refinement routine; the data collection for this compound could only be performed...
NEUTRON diffractionUNIT cellCATALYTIC activityCRYSTAL structureZEOLITESFor the first time the neutron diffraction study of HZSM-5 zeolites with the general composition of (H1+x)[Al3+xSi4+12-xO24]脳wH2O in the orthorhombic approximation (sp. gr. Pnma, z=8) and initial silicate modules Si/Al=...