Alignment adjacent

Figure 2.16 Suggested folding pathway from a hairpinlike structure to the Greek key motif. Beta strands 2 and 3 fold over such that strand 2 is aligned adjacent and antiparallel to strand 1. The topology diagram of the Greek key shown here is the same as in Figure 2.15a but rotated 180° in the plane of the page.

As shown in Fig. 10, the shear strain is proportional to the relative displacement of two parallel aligned adjacent chains. Therefore, it seems plausible to assume that the maximum shear strain value /3=( -8b) at which fracture of the fibre is initiated will be related to a critical overlap length between adjacent... 

Dd-m equals zero exactly if the two magnetic centers are centrosymmetric or lie on an n-fold axis of C symmetry with n >2, so many compounds are imaffected by this term. It is most commonly observed when adjacent magnetic sites are related by a screw axis. The effect of this term is to align adjacent spins at right angles to each other, but it only occms when the exchange interaction is also present and rendering the spins either parallel or antiparallel. The result is for the spins to be canted alternately to either side of their mean axis... 

An alternative approach envisages the stimulating idea to produce an all-carbon fullerene polymer in which adjacent fullerenes are linked by covalent bonds and align in well characterized one-, two- and tliree-dimensional arrays. Polymerization of [60]fullerene, with the selective fonnation of covalent bonds, occurs upon treatment under pressure and relatively high temperatures, or upon photopolymerization in the absence of a triplet quencher,... 

Eclipsed conformation (Section 3 1) Conformation in which bonds on adjacent atoms are aligned with one another For example the C—H bonds indicated in the structure shown are eclipsed... 

The base should be the proper size. This varies according to its size and weight. It should have enough free adjacent space to perform maintenance, alignment and proper cooling. 

Figure 4.2 A p-a-p motif is a right-handed structure. Two such motifs can be joined into a four-stranded parallel p sheet in two different ways. They can be aligned with the a helices either on the same side of the p sheet (a) or on opposite sides (b). In case (a) the last p strand of motif I (red) is adjacent to the first p strand of motif 2 (blue), giving the strand order 1 2 3 4. The motifs are aligned in this way in barrel structures (see Figure 4.1a) and in the horseshoe fold (see Figure 4.11). In case (b) the first p strands of both motifs are adjacent, giving the strand order 4 3 12. Open twisted sheets (see Figure 4.1b) contain at least one motif alignment of this kind. In both cases the motifs ate joined by an ct helix (green).

The interaction of the lone-pair electrons on an amine nitrogen with adjacent C—H bonds is another example of a hyperconjugative effect that can be described in MO language. The lone-pair electrons, when properly aligned with the C—H bond, lead to a... 

Even molecules as simple as dimethoxymethane give evidence of anomeric effects. The preferred conformation of dimethoxymethane aligns each C—O bond with a lone-pair orbital of the adjacent oxygen. ... 

Depending upon size and type of unit, the mounting may vary from simply bolting to the floor to attaching to a massive foundation designed specifically for the application. A proper foundation must (1) maintain the alignment and level of the compressor and its driver at the proper elevation, and (2) minimize vibration and prevent its transmission to adjacent building structures and machinery. There are five steps to accomplish the first objective ... 

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