Contents SECTION 10 CONCLUSIONS

Many investigations of the decompositions of coordination compounds have been concerned with the qualitative identification of the steps involved, characterization of any intermediates formed and comparisons of reactivities of related salts containing systematically varied constituents. Observations and conclusions from such work [1113,1114] are outside the scope of this review, though the results can serve to identify systems worthy of more detailed investigation. The content of this section, reflecting the content of the relevant literature, is restricted to accounts of the behaviour of a number of representative substances. Features distinguishing these reactions from those of simple salts are emphasized. 

A deficiency of water in the cement liquid has the same effect and this occurs when the H3PO4 content exceeds 60%. Wilson Mesley (1968) noted that in a cement formed from a solution of 65 % H3PO4 there was evidence of incomplete reaction even after 6 hours. We have noted in Section 6.5.3 that there is a sharp decline in the rate of reaction when the orthophosphoric acid concentration exceeds 65% H3PO4 (Figure 6.14). The avidity of cements to absorb water from humid surroundings also increases sharply when the phosphoric acid in the cement-forming liquid exceeds 60%. It is difficult to avoid the conclusion that these two phenomena are related and that a deficiency of water retards the cementforming reaction. 

The major purpose of the title is to inform readers about the specific content of the work, ideally identifying both what was studied and how it was studied. The major purpose of an abstract is to summarize, in one clear and concise paragraph, the purpose, experimental approach, principal results, and major conclusions of the work. In most journals, the abstract includes only text in some journals (e.g.. The Journal of Organic Chemistry and Organic Letters), the abstract also includes a graphic. Importantly, both the abstract and title must be able to stand on their own. This is because these two sections (and only these two sections) are reprinted by abstracting services (e.g.. Chemical Abstracts Service, or CAS) in separate documents for literature searches. Also, many chemists read titles and abstracts to obtain a quick overview of the journal s contents but do not read the articles in full. 

One of their interesting observations is that a binary methylene chloride + butanol exhibited a peat resolution with respect to acetyl content at ca. 15 vol.% butanol The developer gave Rf values, 0.9 and 0.25, for samples with acetyl content of 60,5 and 54.1%, respectively. However, this developer ceased to exhibit such a high resolution when the butanol content reached 30 vol.%, and a reversion of acetyl-content dependence of Rf was found instead. The development characteristics were explained by them in a somewhat complicated manner, but this interpretation might be given generally in terms of a demixing effect , which has once been mentioned in Section II. 1. As a conclusion, Kamide et al. recommended binaries of methylene... 

In conclusion, the rather straightforward one-color pump-probe scheme of the self-heterodyne method seems particularly appropriate for smaller coupled systems where the vibrational spectra are less congested. The main content of the present approach and the frequency domain method described in Section IV.C are the same, namely the existence and magnitudes of cross peaks and their relationship to couplings between... 

Water sorption isotherms for hep show marked hysteresis. Powers and Brownyard (P20) found that, while it was difficult to obtain reproducible desorption curves, the low-pressure part of the water vapour resorption curve varied little with w/c ratio, between different Portland cements, or, if allowance was made for the contents of unreacted cement, with the degree of hydration. This was their main direct evidence for the conclusion (Section 8.2.1) that the properties of the hydration product considered in their model were essentially independent of these variables. However, the water sorption iostherms obtained by different investigators have varied considerably (e.g. Refs P20 and S79), and it is not clear to what extent the above conclusion would stand had different desorption conditions been used. 

For any specified drying condition, the calculated water contents arc lower and the porosities higher than those of pure Portland cement pastes, and this appears to be true in varying degrees of composite cements in general. Experimental observations support this conclusion. Non-evapor-able water contents of 2-year-old pastes of w/s ratio 0.5 typically decrease with slag content from around 23% for pure Portland cements to 10 13" for cements with 90% of slag (C42). For the paste to which Table 9.4 refers, the observed non-evaporable water content was 17.7% (H49). Porosities and their relations to physical properties are discussed in Section 9.7. 

The contents of the review are as follows. The dynamics of rodlike polymers are reviewed in Section 2 followed by a review of previous experimental results of the polymerization kinetics of rodlike molecules in Section 3. Theoretical analyses of the problem following Smoluchowski s approach are discussed next (Section 4), and this is followed by a review of computational studies based on multiparticle Brownian dynamics in Section 5. The pairwise Brownian dynamics method is discussed in some detail in Section 6, and the conclusions of the review are given in Section 7. 

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