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3 citations found for Hewat, E.

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A series of through-focus lattice images has been obtained with an electron microscope for single crystals of W4Nb26O77 set at an orientation to give mainly a systematic set of 00l reflexions. Dynamical n-beam computations (n = 435) have been made for a crystal in this orientation to determine the values of the amplitudes and phases of the diffracted beams. Subsequently, the fringe profiles for lattice images have been computed for various thicknesses of crystal and defects of focus. When the experimental factors, including instrument aberrations, are taken into account, good agreement between computed and observed fringes is obtained. An earlier assumption of direct correlation of features in underfocused images with structure in the crystal, is found to be valid, at least for this compound.

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Acta Cryst. (2002). A58, c6
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Two techniques of fitting X-ray to EM data in the presence of steric hindrance are presented and applied to a rotavirus-Fab complex. As the X-ray structures of the Fab and the Fab bound to a viral protein are known, this is a good test case.

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