Clusters extended

Tab. 2.4-1. Summary of alkali metal (M) amalgams containing anionic" mercury clusters, extended mercury partial structures and/or high coordination number polyhedra.

Adapted from Barker et at. (48). Superscript characters P, Ti-peroxide bond length Si, Ti-OSi bond length W, The Ti-O bond distance of Ti to water molecule. Calculated by the BP86/DZVP procedure employing a larger model cluster extending three-coordination spheres from the central Ti ion. 

Proposed model of vibrotactile representation in SI. (a) Thalamocortical arbors in SI have multiple clusters extending across millimeters of cortex (Garraghty et al., 1989). (b) Single SA, RA, or PC fibers terminate in layer IV with three arbors (colored disks). These arbors project in turn to superficial layers ll/lll. Thus, some cortical columns are dominated by a single SA, RA, or PC input, whereas others have mixed input (overlapping disks)... 

Fig. 3. Schematic representation of lateral domains in a bilayer consisting of dil6 0 PC (dark ovals), di22 6 PC(striated ovals), cholesterol (small, light ovals) in a 7 3 3 ratio and rhodopsin (large gray ovals) at a 100 1 ratio of PC rhodopsin. Rliodopsin is in a cluster, highly enriched in 22 6n-3 acyl chains, whereas cholesterol is mainly associated with the saturated 16 0 acyl chains. The enrichment of di22 6 PC in the cluster around rhodopsin is enhanced about six times relative to the bulk concentration. The cluster extends about three layers around rhodopsin.

Sinfelt, J.H. Via, G.H. and Lytle, F.W. "Structure of bimetallic clusters. Extended X-ray absorption fine structure (EXAFS) studies of Ru-Cu clusters." /. Chem. Phys. 72 4832-4844 1980. 

Compounds such as hypercloso- and 12 have provided an entry into the long debated question of the relationship between the structures shown in Fig. 3 and the bicapped square antiprismatic structure for 10-vertex clusters. Extended Hiickel MO calculations on a model system showed that the bicapped square antiprismatic structure is preferred for the 2n+2 skeletal electron system closo) while the C3, structure was preferred for 2n electron systems (hypercloso) Thus, the discussion has revolved around the description of compounds 2 and 12 as either hypercloso 2n electron systems or as isomers of closo (isocloso) 2n+2 electron systems which apparently violate Wade s rules. While simple redox processes would be thought to interconvert these structures, this has not been experimentally shown for underivatized species. As shown in Figure 4, we have now observed, however, the reversible and... 

A large starship slid smoothly into view, riding a lance of violet fusion fire. Definitely a navy craft of some kind, it was still in its combat configuration short-range sensor clusters extended, thermo dump panels retracted. Steamy puffs of coolant gas squirted from small nozzles ringing its midsection. Hexagonal ports were open all around its front hull, too big for combat wasp launch tubes. 

We discuss below the DLA model in detail which was proposed by Witten and Sander [16, 18]. The DLA is a particular model of a random irreversible growth. The growth process starts from a seed particle. A second particle is launched far enough from the seed and makes a random walk. If it visits a position next to the seed, it is stuck to it and both form a two-particle cluster extending the initial seed. Then a third particle is launched and moves randomly around this cluster. It may join the two-particle... 

The positive ion spectra of aromatic hydrocarbon polymers are exemplified by that of polystyrene in Figure 3. Compared to the aliphatic hydrocarbon spectra the C H clusters extend to much higher... 

Associations of point defects, point defect clusters, extended defects... 

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