General Subject Headings

Bibliographic data, keyword phrases, index entries, general subject headings, and CAS Registry Number(s) for documents covered by Chemical Abstracts Service... 

CAS ONLINE American Chemical Society, Columbus, Ohio CAS ONLINE The Chemical Search System From Chemical Abstracts Service 1967-present CHEMICAL ABSTRACTS SERVICE Equivalent of the printed Chemical Abstraets(CA). Bibliographic data, keyword phrases, index entries, general subject headings, and CAS Registry Number(s) for chemistry-related publications in 50 languages from 150 countries. Includes worldwide patent documents. Easy crossover to the CAS CHEMICAL REGISTRY... 

Appendix I Hierarchies of General Subject Headings lists the general and specific headings that have been developed by CAS for the General Subject Index and the hierarchies employed for these headings. 

Appendix III Selection of General Subject Headings discusses the content of the CA General Subject Index. 

The following themes imder the general subject heading Working with OPLC were presented at the International Symposium for Planar Chromatography in Interlaken in 1997 ... 

Appendix I Hierarchies of General Subject Headings (arranged both accord-... 

Hierarchy Index of General Subject Headings Qualifiers for Organs and Tissues General Subject Index... 

There are two references to Fischer-Tropsch synthesis in the Index Guide (Fig. 36). The see cross-reference indicates that the term Fischer-Tropsch synthesis is not itself a General Subject Heading. The subsequent cross-references direct the searcher to ... 

Compounds of the form RN2 X are named by adding the suffix -diazonium to the name of the parent compound RH, the whole being followed by the name of X- (Rule C-931.1, e.g., methanediazonium tetrafluoroborate, benzenediazonium chloride, not phenyldiazonium). Following RC- 82.2.2.3 (IUPAC, 1993), diazonium ions may also be named structurally on the basis of the parent cation diazenylium HNJ, e.g., benzenediazenylium ion. We name the substituent — NJ diazonio (not diazonium) following the same rule. Diazonio describes both mesomeric structures — N = N and — N = N. If one wants to describe one of these structures only, diazyn-l-ium-l-yl or diazen-2-ylium-l-yl has to be used for -N = N or -N = N, respectively. In the General Subject Index of Chemical Abstracts and in Beilstein, diazonium compounds as a class are indexed under this heading. 

Most public libraries subscribe to database services such as InfoTrac or EBSCO that index articles from hundreds of general-interest periodicals (and some moderately specialized ones). The database can be searched by author or by words in the title, subject headings, and sometimes words found anywhere in the article text. Depending on the database used, hits in the database can result in just a bibliographical description (author, tide, pages, periodical name, issue date), a description plus an abstract (a paragraph summarizing the contents of the article), or the full text of the article itself. 

This chapter focuses on the general subject of toxicology and its companion topic, dose-response. Tlie following section headings and subject areas are addressed following this introductory section. 

Before using the General Subject Index, the Chemical Abstracts Index Guide (see Section I.I.I.3) should be consulted in order to obtain the correct index headings. 

The editors of the revised edition are in agreement with the philosophy and the approach that Professor Stanley Walas presented in the original edition. In general, the subject headings and format of each chapter have been retained but the revised edition has been corrected to eliminate errors and insofar as possible update the contents of each chapter. Material that we consider superfluous or beyond the scope and intent of the revised edition has been eliminated. Most of the original text has been retained, since the methods have stood the test of time and we felt that any revision had to be a definite improvement. 

The search begins in the Index Guide in order to ascertain the appropriate heading in the General Subject Index. However, there is no reference to cardiac arrest. This means one of two things ... 

As Fig. 34 demonstrates the value of each term is characterized by dots in front of the word the more dots the more specific the term. 30b shows that heart, neoplasm is a subterm under heart, disease. The brackets around the term crimes indicate that this expression is not an index heading. It cannot be used for searching the General Subject Index and is only mentioned in this hi-erachy to clarify the systematic division of the Hierachy Areas. This context demonstrates clearly that the term toxic chemical and physical damage does not lead in the desired direction. 

Disease is one of the index qualifiers, which subdivide comprehensive, subject-oriented headings in the General Subject Index. The following index qualifiers are for organ and tissue headings ... 

Five abstracts with the index entry arrest are listed under the heading heart, disease in the General Subject Index (Fig. 35). The text modifications indicate that only one of the publications shown here are relevant to the concerned problem (marked with an arrow). The text modification should be read as follows treatment of heart arrest by selective aortic perfusion with perfiuoro-chem. soln. 

Search under the heading hydrogenation in the General Subject Index, and in particular under hydrogenation of carbon monoxide. The term deals with a reaction or a process in this case. 

The term fuel in process engineering generally means fossil fuel. The most common fossil fuels in use today are natural gas, oil, and coal. The latter two have many varying grades and sulfur contents. The emissions evolved from combustion of the fossil fuels are dealt with under other subject headings in this book, including Emissions and T u bines. 

As a consequence of this remarkable variety, it is difi5.cult, if not impossible, to draw the intellectual threads of sudi a conference together when one is not addressing the arrays themselves, a task which I have left to my colleague, George Rieke. I wiU therefore limit myself to a few general observations and comments relevant to where I see this subject heading. 

---