X-Ray Diffraction from Magnetically Oriented Microcrystal Suspension

Three-Dimensional Magnetically-Oriented Microcrystal Array: A Large Sample for Neutron Diffraction Analysis

X-ray diffraction from microtubules.

X-ray diffraction patterns from sperm-tail microtubules indicate that subunits with a 40 to 50 A packing diameter form filaments, alternately half-staggered, parallel to the tubule axis. A 12-or a 13-stranded structure fits best with the X-ray diagram. The strongest bonding is that between units within a longitudinal filament; the weaker lateral interactions are disrupted by drying. Microtubule...

X-ray diffraction from rectangular slits.

It is shown that for micrometre-sized beams the X-ray diffraction from slits is a source of strong parasitic background, even for slits of high quality. In order to illustrate this effect, the coherent diffraction from rectangular slits has been studied in detail. A large number of interference fringes with strong visibility have been observed using a single set of slits made of polished cylind...

Molecular structure from X-ray diffraction

While there are some developments in structure solution and refinement, these represent gradual improvements rather than fundamental leaps in methodology. An exception is the assessment of crystal quality by X-ray diffraction topography using a dedicated solid-state electronic detector; this is an elegant example where the precise physical nature of the crystal has been studied and analyzed. Si...

3 Molecular structure from X-ray diffraction

Recent developments in the determination of molecular structures from X-ray diffraction data are discussed. While the problems associated with chemical crystallography using single crystals have largely been solved, those with structure from powders and of macromolecules are still the subjects of active research. New and improved methods in structure determination in both these fields dominated...