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- Science Citation Index (SCI) depends for intellectual content entirely on
- citations by authors, who are sometimes prodded by editors and referees.
- Its patchiness is therefore not surprising, but frequently it gives access
- to relevant and up-to-date documents not easily accessible by other means.
- Two contrasting "citation families" are described. The first family,
- dealing with the various ascorbic acid derivatives having C substitution at
- C-2, actually retrieved very nearly all the relevant documents (other than
- patent specifications) that were retrieved by a CAS ONLINE substructure
- search. Organic chemists are clearly careful authors. The second family,
- dealing with amino acid residues covalently bound in soil organic matter,
- yielded documents having surprisingly little overlap with those retrieved
- by using a carefully devised Boolean "profile" on the general subject index
- of Chemical Abstracts. This was only partly because SCI is beset by
- language-barrier problems to which Chemical Abstracts is immune. The SCI
- management might extend its journal coverage, but otherwise improvement can
- only come from a more serious attitude to placing references in primary
- publications. SCI remains a complement to, not a substitute for, other
- data-bases.
-