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XXIX-10.—Energy bands as a function of internuclear distance. The graph is drawn for metallic sodium, showing the bands that go into the 2a, 3s, and 3p levels of the atom at infinite separation. The 2s level is an x-ray level, and 3s is the valence electron level. The energy gap which appears between 3s and 3p in the figure, at distances of less than 6A, is really filled with bands from higher atomic levels.

XXIX-11.—Occupied electronic levels in Briiiouin zones, one-dimensional crystal After lapse of time, illustrating that on account of the periodicity the occupied levels really do not change with time.

XXIX-12.—Energy bands in diamond. The lower band is occupied, the upper one unoccupied, illustrating the energy gap above the occupied levels.

XXIX-13 shows heat removal paths of the CHTR in accidents.

XXIX-5.—Potential energy of an electron in a metallic crystal, for two different distances of separation, illustrating the decrease of average potential energy with decreasing lattice spacing.

XXL A proposed mechanism for the metathesis polymerization of substituted alkynes.

XXsys Technologies corrosion retrofit process Application complete. Cap beam retrofit and column retrofit. Source

XXsys Technologies corrosion retrofit process Robo-Wrapper in operation. Source

XXV-10.—The three forms of dichlorbenzene, paradichlorbenzene.

XXV-11.—Three alternative valence structures for benzene.

XXVI-2.—Section of metasilicate chain, View looking directly down.

XXVI-3.—Double silicate chain, view looking directly down.

XXVI-4.—Silicon-oxygen sheet.

XXVI-6.—Schematic representation of crystal and glass.

XXVII-2.—Schematic representation of a glide plane.

XXVIII-1.—Potential energy of an electron at a metallic surface.

XXVIII-2.—Potential energy of an electron between two metals, in equilibrium.

XXVIII. An indirect synthesis of substituted PA using the eno-late method.

XXVIII. Further syntheses of intermediates for histrionicotoxins and related azaspiro-compounds OH

XXVIL Synthesis of dl-perhydrohistrionicotoxin Butyl-pentynylCuLi, hexamethylphosphoric triamide

XXX diagram showing precipitation and recrystallization in 90 cold-rolled, high-purity AlMnO.7 alloy, strip produced by permanent mould casting, hot-rolling, and then cold-roUing . RecrystaUization zone

XXX-10 shows volume changes of the monolithic gr hites at 715 C . Their lifetimes correspond to the fast neutron fluence between 2 and 3 x IcP n cm, the value at which they revert to their original size after shrinkage . Similar results were obtained in other investigations, e g. those performed by the EDF of France and in the former USSR.

XXX-14 gives a vertical cross-section of the primary fuel salt system. The primary fuel-salt system is located in the airtight high temperature containment, operating at about 770 K. As it is shown in Figure XXX-14, the FUJI-233U incorporates diverse and redundant safety systems.

XXX-15. Main heat transport system of FUJI.

XXXIII. Further routes to dl-perhydrohistrionicotoxin and its 2,7-epimeric analog NABH4 Reaction G undoubtedly affords both 7-butyl stereoisomers



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