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Peer reviewedWichterle, Ivan – Journal of Chemical Documentation, 1974
Automatic processing of the bibliography on vapor-liquid equilibrium data is done by means of a specially developed mnemonic coding system. (Author/JB)
Descriptors: Chemistry, Codification, Computers, Data Processing
Peer reviewedRomanec, Michael J. – Journal of Chemical Documentation, 1974
The boundary between two neighboring rings is called the fusion lines, which is enclosed by external segments called arcs. In the code, the separation of fusion line(s) from arcs takes place in such a way that proper matching is achieved. By this procedure, the structure of a compound is recreated. (Author)
Descriptors: Chemistry, Codification, Computers, Data Processing
Peer reviewedSasamoto, Mitsuo; And Others – Journal of Chemical Documentation, 1973
Two systems, WLN and Ringcode, for retrieving structural information were analyzed qualitatively and evaluated for a series of chemical compounds. The studies ranged from specific to generic questions and also involved retrieval by fragments. Neither system was completely satisfactory for all types of searches. (6 references) (Author)
Descriptors: Chemical Nomenclature, Chemistry, Classification, Codification
Peer reviewedHeller, S. R.; And Others – Science, 1977
Describes the data bases and programs of numerous on-line retrieval systems for chemical information, including mass spectra, NMR, x-ray, and substructure data. (MLH)
Descriptors: Chemistry, Computers, Data, Data Processing
Polton, D. J. – Information Storage and Retrieval, 1972
Computer programs have been written which enable substructure searches to be carried out on a file of compounds ciphered using a modified version of the IUPAC (Dyson) notation. The search system outlined is to be linked with one which uses input from the chemical structure typewriter. (3 references) (Author)
Descriptors: Chemical Bonding, Chemical Industry, Chemistry, Computer Programs
Peer reviewedMilne, Margaret; And Others – Journal of Chemical Documentation, 1972
The TSS (Topological Screens System) for substructure search was applied to the CAS Registry file making it searchable on-line. The TSS screens and the use of the screen indexes are described. Statistics on screen assignment are provided, and the strengths and weaknesses of the system are discussed. (Author/NH)
Descriptors: Chemistry, Electronic Data Processing, Indexes (Locaters), Information Retrieval
Peer reviewedMurray, Chris – Chemical and Engineering News, 1975
Descriptors: Chemistry, Computer Programs, Data Processing, Information Processing
Peer reviewedBarker, Frances H.; And Others – Journal of the American Society for Information Science, 1972
Descriptors: Chemistry, Computers, Data Processing, Evaluation
McCracken, I. C.; And Others – 1973
The Inverted File Information Retrieval System (INFIRS), is a document search system which offers a comprehensive range of search facilities. It has been developed at the United Kingdom Chemical Information Service (UKCIS) as a general purpose retrieval tool, suitable for handling a wide variety of data-bases (both free-text and controlled…
Descriptors: Chemistry, Computer Storage Devices, Data Processing, Databases
Download full textInternational Council of Scientific Unions, Paris (France). – 1966
The first section of this precis summarizes the general nature of the present chemical information systems of the world. The discussion is presented in four parts: (1) the primary literature, (2) secondary sources and services, (3) libraries and information centers and (4) other elements categorized as informal communications. The second section…
Descriptors: Chemistry, Computer Programs, Data Processing, Information Centers
Peer reviewedAnd Others; Zipperer, William C. – Journal of Chemical Documentation, 1974
The relative retrieval performances of the CA Integrated Subject File (CAISF), CA Condensates, and a Merged File created from these two data bases were measured. Retrieval performance is reported in terms of recall, precision values, and costs. (Author/JB)
Descriptors: Chemistry, Comparative Analysis, Cost Effectiveness, Data Processing
Gaillardin, R.; And Others – 1980
This report on the multidisciplinary PASCAL database describes the files and the indexing rules for chemistry, biology, and medicine. PASCAL deals with all aspects of chemistry within two subfiles whose combined yearly growth is about 100,000 references. The Biopascal file, organized in the two subfiles of Plant Science and Biology and Medicine,…
Descriptors: Biology, Chemistry, Computers, Data Processing
Gaus, Wilhelm, Ed.; Henzler, Rolf, Ed. – 1977
The 13 papers collected here were presented at the Workshop on Data Documentation held at Reisenburg Castle, Federal Republic of Germany, in July 1975. This workshop was a first attempt to identify some of the problems in the field of data documentation, formulate them, and solve them as far as possible. The subject was approached from four…
Descriptors: Chemistry, Computer Oriented Programs, Confidentiality, Data
