Chemical geographical coverage

Altitude-resolved measurements of ozone and other constituents are necessary for improving our knowledge of physical and chemical processes in the stratosphere. Limbviewing satellite instruments can measure density profiles of stratospheric constituents at a good altitude resolution (1-3 km). In addition, satellite-based measurements have a global geographical coverage. 

In the future, the outsourcing trend based on chemical producers strategic focus on core businesses and efficiency considerations is expected to continue in line with the increasing geographical coverage and availability of professional distribution services. 

As described, fundamental trends in the chemical industry particularly favor leading distributors like Brenntag, which can enter into partnerships with chemical producers on the basis of sufficient geographical coverage and the required financial strength to make investments in environmental standards, as well as adequate technical sales capabilities and services. 

Companies uncertainty about industry capacity. We found that realistic price cyclicality could be generated in the model only when the industry as a whole was unaware how much new supply was in the pipeline. This is an extremely unlikely situation in most chemical product sectors therefore we rejected this hypothesis. However, exceptions might occur in new industries or obscure sectors where the participants are geographically dispersed and which receive little, if any, media or market research coverage. 

Often the study of humic substances in estuaries has been undertaken because estuaries are more easily sampled than the open ocean, and not because of the unique aspects of estuaries per se. It is only in the past few years that systematic studies of humic materials, traversing the salinity gradient, have been carried out. Techniques used in most studies have been those borrowed from the classical fields of soil humus studies it seems likely that in time the techniques will evolve in response to the unique chemical processes that humic materials undergo in the estuarine zone. Quantitatively considered, the literature on humic materials in estuaries lacks the extent of the geographical or topical coverage of the soils literature. This paucity of data causes many conclusions drawn so far to be quite tentative and in need of corroboration. 

It is often said that Chemical Abstracts and Derwent overlap. Table 15 shows a comparison of countries and time periods studied by both Chemical Abstracts and Derwent to illustrate that there are indeed differences in the coverage of facts, both historically and geographically. 

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