The data base coverage of these two services was examined and selected computerized searches performed. The results of this study provided some meaningful conclusions as to the general utility of these services. (3 references) (Author/NH)

Methods for retrieval of information on chemical compounds utilizing several computer data bases are compared to determine scope of data base coverage. Preparation of search questions is outlined and comparative results are reported indicating the yield from each data base. (6 references) (Author/NH)

A storage and retrieval system for chemical structures, using optical coincidence, is in use at Schering Corp. The system rapidly provides the research laboratories with structural information at any generic level. The design, maintenance, costs, and applications are discussed. (4 references) (Author)

The set reduction algorithm is based on set theory and Boolean algebra rather than the graph-theoretic approach. Time trials with a small file of organic chemical structures indicate that the algorithm can be economically used for substructure (or complete structure) sequential searches on a file containing 30,000-50,000 computer-coded structures.…

The user indicated several changes in library use habits as a result of the computer-based searches, among them more direct access to the primary literature and increased use of library resources as they had been made aware of new sources and media--e.g., microforms. (2 references) (Author/NH)