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X -ray diffractograms of pure and Al-substituted goethites prepared in 0.3 M KOH at 70 or 25 C. The vertical line at the 212 peak illustrates the peak shift to higher angles as Al-for-Fe substitution increases.

X -ray fiber diffraction pattern recorded from polymeric DNA containing a well-defined alternating A-T repeat along each strand of the double helix. This conformation, known as the D conformation of DNA, has 8 bp per helix pitch. Diffraction pattern recorded on beamline 7.2 at the Daresbury SRS. At the center of the pattern one observes spacings up to about 3.5 nm while the edge of the pattern reveals structural details down to 0.22 nm. Pattern kindly provided by T. Forssrth.

X -ray geometry of 3-Me-4-4-thiazoIine-2-thione .

X -ray powder diffraction profiles of Ireslily prepared PVA cryogels

X -ray powder spectra of MgCl2 samples with different degree of activation. Milling time

X -ray scattering curves for PT

X -ray structure of perchloro-9-fluorenylidene, displaying a highly twisted ethylenic bond.

X -ray structure of racemic Me2Si2

X -ray structures of oligostan-nanes 6.3 with x -A. Bond lengths

X -X are individual dose-response curves Y is the average

X -X are individual dose-response curves Y is the average dose-response curve for the population.

X 0 Poincare section for the model molecule in the dynamic Born-Oppenheimer approximation.

X 0C0 K2C03, toluene, reflux 41

X 10 AFM images of a nanopattemed Ag surface obtained by micro-contact

X 10 fim AFM image of Ag-coated filter with underlying topographic profile

X 10 M Versus the Ethanol Diethyl Ether Molar Ratio.

X 10. Data from

X 1018 cation radicals per gram

X 1019 . The outer features of the anion-radical spectrum become much less evident as the perylene radical concentration is increased. This effect is more pronounced at low temperatures . Although the spectrum for TNB adsorbed alone on decationated Y is less well resolved at the lower temperature

X 2 -block partitions of a two-dimcrisional lattice

X 2 MZI switch layout

X 20 km SLAR image of a marine oil slick and ships. 24 hours before the recording 25 tons of crude oil had been dumped. Courtesy

X 25 000 3D STM image of a diamond film grown from a mixture of methane and hydrogen

X 29313D STM image of electrodeposited Pt on C from H2PtCl6 ClH aqueous solution

X 31STM image with atomic resolution of the flat triangular crystallite shown in



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