Download Atmospheric Chemical Compounds. Sources, Occurrence and by T. E. Graedel PDF

March 28, 2017 | Pollution | By admin | 0 Comments

By T. E. Graedel

This useful reference examines the constitution and houses of the ambience, together with listings of compounds in clouds, fog, rain, snow, and ice; a list of compounds detected within the stratosphere; and a compendium of compounds in indoor air. An creation to carcinogenicity and bioassay of atmospheric compounds is additionally provided. Readers will locate the large cross-referencing in particular useful--compounds may be positioned by way of chemical sort, identify, CAS registry quantity, or resource.

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Most of the summarized data was reviewed through the U. S. Environmental Protection Agency GeneTox Program. 4. The Tables 47 who need a summary of bioassay data and does not reflect EPA policy. Within this program, a panel of experts for each selected bioassay was convened by the EPA and this panel of experts reviewed the data, primarily information existing in peer reviewed journal articles. Only articles containing data sufficient for evaluation were used; abstracts, short communications, and articles without supporting data were deleted from consideration.

The evidence supporting somatic mutation as the initiation of cancer is circumstantial but strong. 3. Genetic Toxicology and the Bioassay of Chemical Compounds 25 somatic mutation theories is that resultant tumors will have a clonal origin. In other words, the neoplastic (tumor causing) transformation occurs in a single cell which then undergoes uncontrolled proliferation. If a highly infectious agent (such as a virus) was the initiating factor, then a rarely seen multicellular origin would be anticipated.

A compound may be emitted either as an aerosol (indicated by "a") or as a gas. (In the former case it is more properly regarded as "a component of the liquid or solid aerosol"). A few compounds, such as some of the higher alkanes, are apparently emitted in both phases, because of the wide range of source temperatures. The literature is sometimes unspecific as to the state of the compound upon emission, often because analyses of atmospheric samples collected on filter material are not able to determine the natural state of the detected compounds.

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