Bridge crossing

Fig. 8. Projections along the c axis of details of the structures of 8 and 2 with ethano and methano syn bridges (cross-hatched rectangle), respectively. The differing proximity of the syn bridge to the methyl substituents (cross-hatched triangles) on the flanking anti walls of the canal are apparent81...

Figure 15.1 Reactions of formaldehyde with peptides and amino acids. Shown are the four types of reaction products seen when peptides or amino acids are treated with formaldehyde in aqueous solution. These reaction products are methylol (hydroxymethyl) adduct (reaction 15.1), Schiff-base (reaction 15.2), 4-imidazolidinone adduct (reaction 15.3), and one type of methylene bridge [cross-link] (reaction 15.4).

Fig. 10.22 SEM micrograph of the 500 nm thick polysilicon bridge (straight line, center) that is the heart of the hotwire anemometer. The bridge crosses a 80 pm deep groove produced by a micro PS sacrificial layer. After [St6],...

The two pairs of protonated units condense with amino groups to form six-membered chelate cycles (the so-called straps ) cross-linking two tame fragments to produce two tetradentate moieties. The two remaining primary amine groups, being in the trans position, then condense with propanal to form bridges ( cross straps ) between straps. 

The first American victory of the Revolutionary War was won at the historic North Bridge in Concord, a western suburb of Boston. A new version of the old bridge crosses the river. Concord was also important in the lives of poets Ralph Waldo Emerson and Henry David Thoreau, as well as novelist Louisa May Alcott. Emerson s home is near the center of town, while the legendary Walden Pond, where Thoreau went to live life deliberately, is three miles south of Concord s Monument Square. Emerson, Thoreau and Alcott are buried on Author s Ridge in the Sleepy Hollow Cemetery. 

The main chains in 46 are held together by a hydrogen-bonding assembly of capsules, and multiple carbamate —N" H3 O C(0)NH— bridges cross-link these chains. This is a 3D network, since the side amine groups are oriented in aU three directions. The carbamate bridges were detected by NMR spectroscopy. 

Vamiah Con.—A very good form of vamiah can is shown in Fig. 26, The essentials are to have a cover with a stem to receive the handles of the brushes, and a bridge crossing the can a little die-stance down from the top. The cover never sticks, no vamiah collects around the sides, and it is always clean and tidy. The can is round and made of tin. 

Disulfide bridges cross-linking portions of a peptide. 

The Pontresina Bridge is an all-FRP composites pedestrian bridge crossing the Flaz creek in Pontresina that is located in the Swiss Alps at an altitude of 1790 ra. The bridge is only temporary, as it is used only during the winter for ski touring. 

Bridged cross-links containing type / polymers (double-strand polymers) occur extensively in inorganic polymer chemistry. In general, they are fibrous products such as vaicntinite (/I-SbjOj) or chrysotile asbestos,... 

Engineering geomorphoiogy map of the site and situation of a proposed bridge crossing on the Tamur River, eastern Nepal (after Brunsden et al., 1975). With kind permission of the Geological Society. 

Other systems incorporate a monomer with one fimctional gronp, which forms the polymer chains, and another monomer with mnltiple fimctional groups, which contributes to the chains as well as forming bridges (cross-links) between the chains. For example, 2-hydroxyethyl methacrylate (24) and bisphenol A gly-cidyl methacrylate (25) are used in adhesive resins for dental composites ... 

Several methods have been proposed to stiffen these towers, such as adding four shafts to the towers as was done to the Rio Antirrio Bridge crossing of the Gulf of Corinth, Greece (Figure 3.19). A second method would be to use cables arranged in various ways to stiffen the towers externally but this is beyond the scope of this chapter. 

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