Schematic unit

Fig. 13 Stereo representations of the schematic unit cell top) and the crystal packing bottom) of the ferric wheel [Fe6Cl6(L14)6] (39a), view along the c axis...

Schematic Unit Name Variables Relationships of Freedom...

Figure 1. Schematic units of the pyridine-containing polymers and other materials reported here.

Figure Al.7.5(a) shows a larger scale schematic of the Si(lOO) surface if it were to be biilk-tenninated, while figure Al.7.5(b) shows the arrangement after the dimers have been fonned. The dashed boxes outline the two-dimensional surface unit cells. The reconstructed Si(lOO) surface has a unit cell that is two times larger than the bulk unit cell in one direction and the same in the other. Thus, it has a (2 x 1) synnnetry and the surface is labelled as Si(100)-(2 x i). Note that in actuality, however, any real Si(lOO) surface is composed of a mixture of (2 X 1) and (1 x 2) domains. This is because the dimer direction rotates by 90° at each step edge.

Figure Al.7.5. Schematic illustration showing the top view of the Si(lOO) surface, (a) Bulk-tenninated structure. (b)Dimerized Si(100)-(2 x 1) structure. The dashed boxes show the two-dimensional surface unit cells.

Figure Al.7.6. Schematic diagrams of the DAS model of the Si(l 11)-(7 x 7) surface structure. There are 12 adatoms per unit cell in the outennost layer, which each have one dangling bond perpendicular to the surface. The second layer, called the rest layer, also has six rest atoms per unit cell, each with a perpendicular dangling bond. The comer holes at the edges of the nnit cells also contain one atom with a dangling bond.

Schematic diagram of a simple flow injection analyzer showing the principal units.

Schematic diagram of deoxyribonucleic acid (DNA) showing the pairing of nitrogen bases (A-T C-G) between parts of two strands of DNA, the backbone of each strand being composed of alternately linked sugar and phosphate units.

Figure 9.2 (a) Schematic representation of a unit cube containing a suspension of spherical particles at volume fraction [Pg.589]

A schematic of the MGCC process is shown in Figure 9. The mixed Cg aromatic feed is sent to an extractor (unit A) where it is in contact with HF—BF and hexane. The MX—HF—BF complex is sent to the decomposer (unit B) or the isomerization section (unit D). In the decomposer, BF is stripped and taken overhead from a condensor—separator (unit C), whereas HF in hexane is recycled from the bottom of C. Recovered MX is sent to column E for further purification. The remaining Cg aromatic compounds and hexane are sent to raffinate column E where residual BE and HE are separated, as well as hexane for recycle. Higher boiling materials are rejected in column H, and EB and OX are recovered in columns I and J. The overhead from J is fed to unit K for PX separation. The raffinate or mother Hquor is then recycled for isomerization. 

Fig. 17. Schematic of Asahi Chemical Acily2er-ML bipolar electroly2er. (a) View of cell units (b) stmcture of cell.

Fig. 8. (a) Schematic for an FCC unit showing where the various fluidization regimes are found and (b) a corresponding phase diagram for Group A powder (FCC catalyst) where the numbers on the curves represent the superficial soHd velocity in m/s. A represents the bubbling regime B, the turbulent ... 

Fig. 12. (a) Schematic diagram of cmde unit showing five hot streams leaving the cmde column, and (b) temperature enthalpy diagram for the streams in (a) where A represents the kerosene pumparound B, the gas oil product C, the residuum D, the overhead reflux and E, the cmde. The dashed line is the... 

Fig. 1. A schematic representation of the xylan backbone of arborescent plants, where Xylp = xylopyranosyl unit ...

Fig. 2. A simplified schematic representation of glucomaiman, where Glc is the D-glucopyranosyl unit Man is the D-maimopyranosyl unit Gal is the...

Commercially, the burner chamber and the absorber cooler sections are combined as a single unit for small-scale production. However, in large capacity plants, these units are separated. A typical commercial unit is schematically described in Figure 5 (32). 

Fig. I. Schematic flow diagram of a countercurrent extraction unit for the continuous separation of two REE or two groups of REE.

These operations are all conducted in the single unit of the Kivcet furnace, which consists of a smelting shaft, gas removal shaft, and electrothermic part. A schematic of the Kivcet process is shown in Figure 5 (13). The electrothermal part is separated from the smelt shaft in the gas space by a partition... 

Interfdci l Composite Membra.nes, A method of making asymmetric membranes involving interfacial polymerization was developed in the 1960s. This technique was used to produce reverse osmosis membranes with dramatically improved salt rejections and water fluxes compared to those prepared by the Loeb-Sourirajan process (28). In the interfacial polymerization method, an aqueous solution of a reactive prepolymer, such as polyamine, is first deposited in the pores of a microporous support membrane, typically a polysulfone ultrafUtration membrane. The amine-loaded support is then immersed in a water-immiscible solvent solution containing a reactant, for example, a diacid chloride in hexane. The amine and acid chloride then react at the interface of the two solutions to form a densely cross-linked, extremely thin membrane layer. This preparation method is shown schematically in Figure 15. The first membrane made was based on polyethylenimine cross-linked with toluene-2,4-diisocyanate (28). The process was later refined at FilmTec Corporation (29,30) and at UOP (31) in the United States, and at Nitto (32) in Japan. 

Eig. 4. Shell a-olefin and internal olefins schematic (Geismar, La. and Stanlow, United Kingdom). 

Fig. 7. Schematic of a self-contained plasma processing unit designed to continuously plasma-treat and impregnate with resin, reinforcing fibers for enhanced composite strength. The unit can also be used to plasma-treat wires to be coated or treated for improved adhesion. Throughput speeds of over...

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