Zobrazeno 1 - 10 of 44 pro vyhledávání: '"C. E. Nordman"'
1
A generalized Patterson-search method
Autor: C. E. Nordman
Publikováno v: Acta Crystallographica Section A Foundations of Crystallography. 50:68-72
A procedure for Patterson search, or molecular replacement, is described in which the criteria of fit are based on matching the asymmetric unit of the entire Patterson function. In rotation search, the Patterson function is compared with the self-Pat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0fac03b8cab799c2d0511141256071e2
https://doi.org/10.1107/s0108767393006865
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2
Structures of (E,E)-o-nitroacetophenone azine (I), (E,Z)-o-nitroacetophenone azine (II) and (E,E)-o-nitrobenzaldehyde azine (III)
Autor: Leh-Yeh Hsu, D. H. Kenny, C. E. Nordman
Publikováno v: Acta Crystallographica Section C Crystal Structure Communications. 49:394-398
In compounds (I) and (II) the o-nitro group is anti to the methyl group whereas in (III), which lacks the methyl, it is syn to the H atom. Distortions from planarity indicate that the nitro group experiences stronger repulsion from the lone pair on N
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d74a6ddb9ffff6b438faf4d1f3e8feca
https://doi.org/10.1107/s0108270192009685
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3
Crystallographic characterization of reaction intermediates with bridgehead double bonds: structures of Diels–Alder adducts of (E)- and (Z)-9-thiabicyclo[3.3.1]non-1-ene derivatives with 1,3-diphenylisobenzofuran
Autor: M. Strumpel, C. E. Nordman, J. R. Wiseman, C. B. Quinn
Publikováno v: Acta Crystallographica Section B Structural Science. 46:229-234
C 28 H 26 O 3 S cristallise dans P2 1 /n, avec a=16,186, b=9,452, c=15,583 A, β=111,06°, Z=4; affinement jusqu'a R=0,047. C 29 H 28 O 3 S cristallise dans P2 1 /n avec a=11,343, b=19,323, c=11,006 A, β=106,70°, Z=4; affinement jusqu'a R=0,041. Po
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84c334ef405173acc2788a003e324ca1
https://doi.org/10.1107/s0108768189011687
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8
Procedures for detection and idealization of non-crystallographic symmetry with application to phase refinement of the satellite tobacco necrosis virus structure
Autor: C. E. Nordman
Publikováno v: Acta Crystallographica Section A. 36:747-754
An electron-density function with a region of local non-crystallographic symmetry is sampled with a movable symmetry grid. This provides a means of optimizing the parameters of the locally symmetric region as well as of idealizing its electron densit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fa9c3a84e4f7c4935ada027e021109e0
https://doi.org/10.1107/s0567739480001519
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10
An assessment of criteria of fit in Patterson search
Autor: C. E. Nordman
Publikováno v: Proceedings / Indian Academy of Sciences. 92:329-334
The problem of reliably detecting a known set ofn vectors of weight wi embedded in a heavily overlapped Patterson function Pi is investigated by a Monte-Carlo simulation based on searches of computer-generated random number sequences. Several formula
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a21c8f2b837c162ae2b5b94e94d2bdd
https://doi.org/10.1007/bf02839135
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