Order of rank

The conclusion to be reached from this analysis is that various classes of activators for photoreducible dye sensitized polymerization can be ranked according to their efficacy, and that the order of rank is consistent with the mechanism in which... 

Rank the following isomers in order of increasing boiling point, and explain the reasons for your order of ranking. 

Table 14.7 shows some reported limiting temperatures in air and in vacuum. The oxidation temperatures quoted are, as always, rather arbitrary and variable because the oxidation is a multiphase process and is strongly affected by the particle size of the solid and the pressure and circulation of air or oxygen. However, the enormous variation in the decomposition temperatures in vacuum for the first four compounds is impossible to explain, and the best that can be said of them is that the order of ranking is similar. 

U.S. EPA. National priorities list. 786 current and proposed sites in order of ranking and by state, Washington, DC, October 1984. 

Metabolism studies have been conducted on 7 and the closely related triazolo[l,5-c]pyrimidine analog 24 (Eig. 2.4.4). The metabolites identified in wheat Triticum aestivum) for 7 and 24 are shown in Eig. 2.4.4. These studies showed that O-dealkylation of one heterocycle methoxy groups was occurring with 7 in wheat (Eig. 2.4.4). In comparison, both methoxy groups on the heterocycle of 24 underwent O-dealkylation. Table 2.4.8 compares the metabolism rates and activity on wheat and blackgrass Alopecurus myosuroides) for 5, 7 and 24. The order of rank-... 

In terms of abundance, nitrogen ranks thirty-third among all elements but this low ranking belies its importance, as evidence by the fact that 5 chemical compounds containing nitrogen appear among the top 15 chemicals produced in the United States. These five, along with top-ranked sulfuric acid, are listed in order of rank for the year 1989, below and in Table IV. 

How does the order of ranking so obtained (a) relate to the actual lifetime that will be seen in bonded components and structures subjected to changing environmental conditions, and (b) relate to the cost effectiveness of the adhesive system chosen, i.e. has a very conservative overkill been made in the choice of the adhesive system needed to attain a given durability, to the extent that adhesive bonding is now not an economically viable option for the joining process ... 

U.S. EPA, National Priorities List. 786 Current and Proposed Sites in Order of Ranking and by State, EPA, Washington, DC, 1984. 

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