North profiles

Fig. 6.13, Structural profiles of the Sahara Platform. AA == south-north profile in the eastern Sahara BB - south-north profile in central Sahara CC - west-east profile in the southern Sahara. Pg = Paleogene, Ng = Neogene...

Trusses may be the best solution for very high-imposed loads. Frame action with columns is not possible with trusses. Although trusses are generally the lightest form of roof construction, they may be the most expensive due to high fabrication cost. A combination of lattices or lattice and truss may form a sawtooth roof profile for incorporation of north lights. 

Legislation enacted by both Canada and the United States (see the US-Canada Air Quality Accord, 1991) will, when implemented, reduce the North American emissions of sulphur dioxide by about 50% based upon the 1980 baseline. These projected emission fields have been appplied in the atmospheric source-receptor models that were described above, to provide a projected deposition field for acidic sulphate that would be expected (14). The predicted sulphate deposition fields have then subsequently been appUed in aquatic effects models that provide estimates of regional surface water acidification distributions (50). The regional acidification profiles have then been used in a model of fish species richness (51) that results in an estimate of the expected presence of fish species as compared to that expected in an unacidified case. 

Gamboa PM, Caceres O, Antepara I, Sdnchez-Monge R, Ahrazem O, Salcedo G, Barber D, Lom-bardero M, Sanz ML Two different profiles of peach allergy in the north of Spain. Allergy 2006 ... 

Isotachis lyallii Mitt, is a liverwort that occurs on both the north and south islands of New Zealand. A study of the lipid fraction of this species collected from both islands revealed different secondary metabolite profiles involving sesquiterpenes and aromatic esters (Asakawa et al., 1997). The sesquiterpene array consisted of... 

The value of spruce-oil chemistry in sorting out problems of hybridization and introgression—major factors in Picea taxonomy—was succinctly summarized by von Rudloff who defined three situations (1) Terpene variation is limited such that it is not possible to use these characters in studies of introgression this is the case in eastern North America where the ranges of black spruce and red spruce overlap. (2) Sufficient variation in terpene profiles exists for the compounds to be useful markers in systematic studies as seen in white spruce. Brewer s spruce, and Sitka spruce. (3) Tree-to-tree variation in terpene content is so variable that use in che-mosystematic studies is precluded, or at least requires very large sample sizes for statistical reliability, as seen with Engelmann s spruce. 

The availability of North American specimens of Glehnia made it possible to compare coumarin and acetylene profiles of this widely disjunct system (Hiraoka et al., 2002). Analysis of plant material collected from four widely separated sites, that is, northern California, central Oregon, northern Washington, and northeastern Queen Charlotte Islands, British Columbia, revealed a profile characterized by low levels of furanocoumarins and a comparatively high level of panaxynol. The results are similar to those that characterize the southern Japanese form. The North American... 

Chrysosplenium was discussed above where differences in flavonoid profiles of C. glechomaefolium among populations along a transect ranging from north central California to northern Washington were discnssed (Bohm and Collins, 1979). Chrysosplenium also appears later in the section on polar disjnnctions. 

The similarity between the profiles of the North American and Argentinean species suggests the possibility of a closer relationship between them than between any other pair of taxa in the genus, including between the Argentinean and Peruvian... 

Muhs DR, Kermedy G, Rockwell TK (1994) Uranitun-series ages of marine terrace corals from the Pacific coast of North America and implications for last-interglacial sea level history. Qrrat Res 42 72-87 Nozaki Y, Nakanishi T (1985) Pa and °Th profiles in the open ocean water coltrrrm. Deep-Sea Res 32 1209-1220... 

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