Journal ArticleDOI
A semi-empirical method of absorption correction
TLDR
An extension of Furnas's method is described in this paper, where the variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level.Abstract:
An extension of Furnas's method is described. The variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level. Transmission coefficients for any general reflexion hkl are then given approximately by T(hkl) = [T(ϕinc) + T(ϕret)]/2 where ϕinc and ϕret are the azimuthal angles of the incident and reflected beams. Equations are derived for (ϕinc and ϕret and the accuracy of the method is discussed.read more
Citations
More filters
Journal ArticleDOI
Molecular complexes of sulfonamides. 2.1:1 complexes between drug molecules: sulfadimidine-acetylsalicylic acid and sulfadimidine-4-aminosalicylic acid
TL;DR: In this paper, the crystal structures of the 1:1 complexes sulfadimidine-acetylsalicylic acid (I) and sulfadimanidine-4-aminosalicylic acids (II) are described.
Journal ArticleDOI
Toward a novel metal based chemotherapy against tropical diseases 4. Synthesis and characterization of new metal-clotrimazole complexes and evaluation of their activity against Trypanosoma cruzi
Roberto A. Sánchez-Delgado,Maribel Navarro,Keyla Lazardi,Reinaldo Atencio,M. V. Capparelli,Franklin Vargas,Julio A. Urbina,André Bouillez,Alfred F. Noels,Dante Masi +9 more
TL;DR: In this paper, the synthesis and characterization of metal imidazole complexes showing activity against Trypanosoma cruzi, the causative agent of Chagas disease, are presented.
Journal ArticleDOI
A structural model of rubredoxin from Desulfovibrio vulgaris at 2 Å resolution
TL;DR: The structure of the iron-sulfur protein rubredoxin from Desulfovibrio vulgaris has been determined from X-ray diffraction data by the molecular replacement method, with no major differences in conformation or internal hydrogen bonding being apparent at this point.
Journal ArticleDOI
Crystal structure of Azotobacter cytochrome c5 at 2.5 Å resolution
Daniel C. Carter,Karen A. Melis,S. O'Donnell,Barbara K. Burgess,William Furey,William Furey,Bi-Cheng Wang,Bi-Cheng Wang,C.D. Stout +8 more
TL;DR: Alignment of c5 and c551 shows that the two cytochromes, in spite of sequence differences, have remarkably similar charge distributions.
Journal ArticleDOI
Silver(I) Pyrazolates. Synthesis and X-ray and (31)P-NMR Characterization of Triphenylphosphine Complexes and Their Reactivity toward Heterocumulenes.
TL;DR: Single-crystal X-ray analysis of [Ag(pz-CS(2))(PPh(3))(2)] has shown the unexpected S,S coordination of the pyrazolecarbodithioate fragment, which is dependent on the experimental conditions.
References
More filters
Book
International tables for X-ray crystallography
Norman Fordyce McKerron Henry,Lonsdale, Kathleen, Dame,John S. Kasper,Caroline H. MacGillavry,Gerard D. Rieck,James A. Ibers,Walter C. Hamilton +6 more
ReportDOI
A fortran program for calculating single crystal absorption corrections
D.J. Wehe,W.R. Busing,H.A. Levy +2 more
TL;DR: A Fortran program is described for calculating the absorption correction for application to single crystal x ray or neutron intensity measurements and is available in the form of symbolic punched cards.