Acta Crystallographica Section A
Acta Crystallographica
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FOUNDATIONS
ADVANCES

Volume 49| Part s1

ISSN: 2053-2733

August 1993 issue

Abstracts of the XVI IUCr Congress

Beijing, China, 21-29 August 1993

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abstracts

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A personal history of dynamical diffraction theory

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3rd generation X-ray synchrotrons - first experiments from ESRF TROIKA beam line

J. Als-Nieslen, G. Grubel, J. F. Legrand and M. S. Lehmann

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Microtomography

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Time-resolved protein crystallography

K. Moffat, Y. Chen, K. Ng, Z. Ren, G. Borgstahl, D. McRee and E. D. Getzoff

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Direct methods in superspace

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Contribution of crystallography to the elucidation of hydrolytic enzyme mechanisms

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Virus structure and virus infectivity

M. G. Rossmann, P. R. Kolatkar, M. A. Oliveira, R. Zhao, T. S. Baker, N. H. Olson, R. H. Cheng and J. M. Greve

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Crystallography of ribosomes

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Crystallographic environment as an approach to molecular recognition and drug design

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Structure based drug design

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Systematics of crystal packing in molecular solids

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Recognition in supramolecular structures

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Internal surfaces as order principles in solids

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Computer simulation of inorganic structures with first-principle interatomic potentials

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Fullerenes

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Crystal structure and superconducting transition of high T_c materials

V. N. Molchanov

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Neutron and X-ray reflectometry of surfaces and interfaces

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Decagonal quasicrystal and crystalline approximants

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Crystallography in biotechnology

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Time-resolved structural studies

J. R. Helliwell

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The use of synchrotron radiation instrumentation for time-resolved structural studies: muscle diffraction

J. Bordas, N. Bliss, G. Diakun, C. Hall, J. Harries, R. Lewis, G. Mant, M. Martin-Fernandez, A. Svensson and E. Towns-Andrews

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Time-resolved X-ray absorption spectroscopy

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In situ diffraction experiments: recent advances and results

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New type of diffractometer for quick data collection

Y. Ohashi, H. Uekusa, A. Sekine, Y. Takenaka, T. Higashi and T. Sato

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Sub-nanosecond time resolution in Laue diffraction using a third-generation synchrotron

M. Wulff and Å. Kvick

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Deconvoluting Laue multiple diffraction spots by the density modification method

Q. Hao and M. M. Harding

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Development of X-ray focusing optics for microdiffraction

W. Yun, B. Lai, Z. Cai, D. Legnini, K. Randall, A. A. Krasnoperova, F. Cerrina and E. Di Fabrizio

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Time-resolved energy-dispersive powder diffraction study of the formation of cordierite from a chromium-doped cordierite glass

M. Oversluizen, S. M. Clark and G. N. Greaves

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Combined QEXAFS-XRD, a new technique combining in situ fast scanning X-ray absorption spectroscopy and X-ray diffraction

G. N. Greaves, A. J. Dent, B. R. Dobson, S. M. Clark, C. A. Ramsdale, G. Sankar, P. A. Wright, S. Natarajan, J. M. Thomas and R. H. Jones

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Synchrotron radiation for microcrystal structure determination and for Laue time-resolved studies

B. M. Kariuki, M. M. Harding, I. M. Dodd and G. M. T. Cheetham

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Synchrotron radiation diffraction for complete structure determination of a small organometallic crystal, AuOs₃ (CO) ₈PPh₃dppm.PF₆.0.5C₆ H₅Cl

I. M. Dodd, H. Quan and M. M. Harding

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Macromolecular crystallography at LURE: instrumentation for X-ray diffraction data collection and results

R. Fourme, R. Kahn, W. Shepard and A. Beniley

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Data acquisition and processing facilities available at SERC Daresbury laboratory

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Image-plate data collection in Hamburg

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Weissenberg camera for macromolecules with imaging-plate data collection system at PF, present status and future plan

N. Sakabe, K. Sakabe, T. Higashi, A. Nakagawa, N. Watanabe and S. Adachi

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Present and future prospects for macromolecular crystallography at the Cornell High-Energy Synchrotron Source (CHESS)

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Processing of data from large unit cell virus crystals

M. S. Smyth, J. G. Tate and D. I. Stuart

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A new macromolecular crystallography station on the beamline BL-18 at the Photon Factory

N. Watanabe, S. Adachi, A. Nakagawa and N. Sakabe

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Position-sensitive photomultiplier tube neutron detector

C. Wilkinson, M. Lehmann, A. Gabriel, J. Allibon and F. Dauvergne

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A neutron-sensitive TV-image intensifier system

H. G. Smith and J. B. Davidson

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Multiple small-angle scattering - a blessing in disguise?

S. Mazumder and A. Sequeira

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Omega energy filtering TEM: applications in quantitative electron diffraction

C. Deininger and J. Mayer

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Development of CCD-based area detectors for macromolecular crystallography using synchrotron and laboratory sources

W. C. Phillips, M. Stanton, Y. Li, D. O'Mara, J. Xie, E. M. Westbrook, I. Naday, S. Ross, M. L. Westbrook, M. Kanyo and J. W. Pflugrath

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Fundamental parameters: a report of the activities of the Commission on Crystallographic Apparatus

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X-ray TV detector for structural studies with synchrotron radiation source

Y. Amemiya, S. Kishimoto, T. Oguchi, N. Yagi, K. Wakabayashi, Y. Asano, T. Ueki, T. Endo and M. Suzuki

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Gas detectors and image plates. The pros, the cons, the future

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DAFS and DANES: two new X-ray diffraction techniques using real photons and virtual photoelectrons

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Rare earth Mössbauer spectroscopy and MAPON as microscopic probes of the local crystal field

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Resonant nuclear X-ray scattering as a crystallographic tool

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Micro-region crystallography by the Laue method using white SR

K. Ohsumi, K. Hagiya, T. Takase, S. Yasuami, M. Miyamoto and M. Ohmasa

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Computer-aided crystal orientation

Y. J. Jiang, X. N. Wang and L. Z. Zeng

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A highly parallel imaging gas counter for synchrotron radiation diffraction

R. A. Lewis, N. S. Fore, C. Hall, W. Helsby, A. Jones, B. Parker, I. Sumner and J. S. Worgan

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An imaging plate (IP) area-detector system developed for high-speed data-collection from large-unit-cell crystals using a rotating-anode generator

M. Sato, N. Tanaka, Y. Katsube and T. Higashi

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The first experiments with a high power wiggler at the third generation European Synchrotron Radiation Facility

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Inexpensive upgrade of a Nicolet P3M diffractometer

C. Svensson and B. Sommarin

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A laboratory dispersive EXAFS spectrometer

J. Galy, P. Baules, J. Jaud, P. Lecante and A. Mosset

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HX-1B fully microcomputerized four-circles single-crystal diffractometer control system and automated crystal structure analysis system

S. Jinchuan, J. Xing, Y. Daihua and L. Jun

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Neutrons and X-rays for the study of magnetism

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X-ray magnetic critical scattering

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Review of magnetic X-ray diffraction experiments

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Magnetic circular X-ray dichroism: probing local magnetic structures

G. Schutz and S. Stahler

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Site-specific magnetic XANES

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Magnetic structural studies using long-wavelength pulsed neutrons

J. B. Forsyth, C. J. Carlile and P. S. R. Krisna

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Circular magnetic X-ray dichroism at Fe K-edge and Gd L_2,3-edges in Fe/Gd multilayered films

F. Itoh, M. Nakamura, H. Sakurai and H. Kawata

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Magnetic X-ray diffraction from ferromagnetic materials

S. P. Collins, D. Laundy and R. J. Cernik

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Excitations of condensed matter studied by inelastic X-ray scattering with high energy resolution

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Modeling as a complement to powder diffraction experiments in studying inorganic and organic solids

C. M. Freeman and J. M. Newsam

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Orientational order-disorder transitions in the van der Waals complex C₆H₆:C₆F₆ - a case for combining powder neutron and X-ray data

J. K. Cockcroft, A. N. Fitch and J. H. Williams

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Complementarity or competitivity of synchrotron and neutron powder diffraction

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A multi-purpose vacuum diffractometer for operation at the Photon Factory

S. W. Wilkins, Z. Barnea, D. C. Creagh, T. J. Davis, R. Garrett, S. Janky and A. W. Stevenson

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Cation distribution in Zn-oxide spinels

W. Schäfer, G. Will and J. Gal

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Science from pulsed spallation neutron sources

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Pulsed neutron sources and steady reactor sources

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Chemical physics with advanced neutron sources

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SXD: single crystal structural and diffuse scattering studies by time-of-flight neutron Laue diffraction

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Phase determination, extension and refinement by maximum entropy methods

E. Prince, L. Sjölin and D. M. Collins

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Experimental determination of triplet phases of macromolecular structures

K. Hümmer and E. Weckert

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Progress towards application of the minimal function to macromolecules

C. M. Weeks, R. Miller, G. D. Smith, M. M. Teeter and H. A. Hauptman

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Maximum entropy, likelihood and the crystallography of biological macromolecules

C. J. Gilmore, G. Proctor, J. R. Fryer, G. Bricogne, S. Xiang, C. W. Jr Carter, A. Brisson, G. Moser and M. Schmutz

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Electron-density histograms and the phase problem

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Incorporation of direct methods with all the protein-crystallography phasing tools available. A new probabilistic expression for triplets and quartets

C. Kyriakidis, R. Peschar and H. Schenk

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Molecular scene analysis: the integration of direct methods and artificial intelligence strategies for solving protein structures

S. Fortier, J. Glasgow and F. H. Allen

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Electron density squaring method and non-crystallographic symmetry

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Direct phasing for macromolecules by entropy maximisation and likelihood ranking

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Fourier-transform-based methods for phase extension and refinement and perhaps the solution of macromolecules

L. Refaat, C. Tate and M. M. Woolfson

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A density modification procedure for solving small and middle size structures and phase refinement for proteins

M. Shiono, Y. Yada, L. S. Refaat and M. M. Woolfson

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Direct phasing of macromolecular structures by multiple beam diffraction

E. Weckert, W. Schwegle and K. Hümmer

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Fourier series probability distribution of structure factors and its relation with other distributions

G. B. Mitra and S. Das

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The form factor formalism: should higher order tensor representations be used?

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Protein diffraction around the sulfur K-absorption edge using 5 Å X-rays from a storage ring

M. S. Lehmann, H.-H. Müller, S. Stuhrmann and H. B. Stuhrmann

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Parameter refinement in the MAD method by a maximum-likelihood procedure

E. de la Fortelle, G. Bricogne, R. Kahn and R. Fourme

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Determination of the structure of a large protein by MAD phasing: glutamine PRPP amidotransferase

J. L. Smith, E. J. Zaluzec, J.-P. Wery and Y. Satow

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Anharmonic thermal vibration of rutile (TiO₂) determined from nuclear density distribution of maximum entropy method analysis

S. Kumazawa, M. Takata and M. Sakata

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Determination of the anharmonicity constant of GaAs by means of the Bijvoet-relation of the weak (666) reflection

U. Pietsch, K. Paschke and K. Eichhorn

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The superstructure of PbZrO₃: investigation at Pb L_III and Zr K absorption edges

Y. Soejima, K. Nagino, Y. Itoh and K. F. Fischer

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Some new methods of applying multi-wavelength anomalous scattering data

H.-F. Fan, M. M. Woolfson and J.-X. Yao

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Acta Cryst. (1993). A