Different sources of error in single isomorphous replacement (SIR) maps are analysed. It is shown that SIR maps are good enough in themselves to localize a molecule but the absence of low-resolution reflections can distort he image of the molecule. Even in this case the molecule can be reliably

Ab initio low-resolution phasing in crystallography of macromolecules

of “image filter ” effects, including traditional image filters, such as blurring or embossing; improved texture synthesis, in which some textures are synthesized with higher quality than by previous approaches; super-resolution, in which a higher-resolution image is inferred from a low-resolution source

. In addition, we present an accretion criterion based on low-resolution optical spectroscopy, which can be applied, from the statistical point of view, to large samples. Key words. Brown dwarfs – Accretion – open clusters 1. Brown Dwarfs, accretion, and high-and medium-resolution spectroscopy During the last

The bulk solvent plays a key role in the direct phasing at low resolution. The connectivity-based phasing method has been tested for the crystal of the tRNAAsp-aspartyl-tRNA synthetase complex. The neutron diffraction data have been measured for different solvent contrast masking different

for the investigation of such diversities. In this paper, we present techniques for computing a high-resolution reconstructed image from an ensemble of low-resolution images containing sub-pixel level displacements. The quality of a reconstructed image is measured by computing the Hamming distance between the Daugman 4

for the investigation of such diversities. In this paper, we present techniques for computing a high-resolution reconstructed image from an ensemble of low-resolution images containing sub-pixel level displacements. The quality of a reconstructed image is measured by computing the Hamming distance between the Daugman 4

Image reconstruction for multi-shot diffusion imaging requires accurate phase maps for each individual segment. Existing methods make use of 2Dnavigators [1] or self-calibrating trajectories to obtain low resolution phase maps. However, when the phase variations are not smooth enough compared

. It was shown possible (i) to extend the phases from a known 6.0/ ~ single isomorphous replacement set to at least 4.9. ~ resolution; (ii) to determine a reasonable structure at low resolution given the molecular envelope and non-crystallographic symmetry; and (iii) to use the resulting low-resolution phases

retrieval for a complex-valued object by using a low-resolution image