Scientific Technical Network

Scientific Technical Network (STN) (http //stnweb.cas.org/) is probably the most useful and extensive structure-searchable resource for chemistry worldwide. More than 200 scientific databases are available via STN (this service is not free). Several related databases can be searched simultaneously ( cluster search ). Cluster presearch is free and very useful, as the number of relevant hits per database can be visualized in this way. The most important files on STN are the CA Registry, CA Plus, Beilstein and the INPADOC (patent data) file. 

The most important host in chemical information is STN - Scientific Technical Network International. The nature of this host is most specific, as three institutionalized computer centers are backing it, the Chemical Abstracts Service, Columbus, Ohio, the Fachinformationszentrum (FIZ) Karlsruhe, and the Japan Information Center of Science and Technology (JICST), Tokyo. These three are permanently interrelated by use of satellite lines (Fig. 78). The... 

STN International Scientific Technical Network, computer system which is jointly offered by three database producers the American Chemical Society, -y FIZ Karlsruhe and the Japan Information Center of Science and Technology (JICST). The three service centers at CAS in Columbus (USA), in Karlsruhe (Germany) and in Tokyo are linked via satellite and submarine cable. STN currently offers about 160 databases in a variety of scientific and technical subject areas. 

Use of Single LN. The LN value 26594 was used as a search term the 16 hits of Figures 2 and 3 were retrieved from a data base corresponding to approximately 1 million structures (and are reproduced by kind permission of The Scientific Technical Network, STN), along with ten further hits (not shown), which were... 

Farnsworth, N.R. NAPRALERTdatabase. University of Illinois at Chicago Chicago, IL, 2004 production (an online database available directly through the University of Illinois at Chicago or through the Scientific and Technical Network [STN] of Chemical Abstracts Services). 

ACS = American Chemical Society CAS = Chemical Abstracts Service STN = Scientific and Technical Network WWW = World Wide Web. 

Use of Several LN in Combination. Let us go back again briefly to the example of anisole, mentioned above. In the following we shall use the query language of the Scientific and Technical Network (STN). The query ... 

Disciplined Approach to Problem Definition Specific technical objectives Quality function deployment or similar process Acquisition of background, literature, etc Networked to many technology resources Scientific Method... 

India is an R D hotspot, defined as a place where (1) companies are able to tap into existing scientific and technical expertise networks, (2) there are good links to academic research facilities, (3) the environment supports innovation, and (4) it is easy to commercialize. Costs of pharmaceutical innovation in India are estimated to be as low as one-sevenths of their levels in Europe. 

Research articles of interest to biochemists may appear in many types of research journals. Research libraries do not have the funds necessary to subscribe to every journal, nor do scientists have the time to survey every current journal copy for articles of interest. Two publications that help scientists to keep up with published articles are Chemical Titles (published every 2 weeks by the American Chemical Society) and the weekly Current Contents available in hard copy and computer disks (published by the Institute of Science Information). The Life Science edition of Current Contents is the most useful for biochemists. The computer revolution has reached into the chemical and biochemical literature, and most college and university libraries now subscribe to computer bibliographic search services. One such service is STN International, the scientific and technical information network. This on-line system allows direct access to some of the world s largest scientific databases. The STN databases of most value to life scientists include BIOSIS Pre-views/RN (produced by Bio Sciences Information Service covers original research reports, reviews, and U.S. patents in biology and biomedicine), CA (produced by Chemical Abstracts service covers research reports in all areas of chemistry), MEDLINE, and MEDLARS (produced by the U.S. National Library of Medicine and Index Medicus, respectively cover all areas of biomedicine). These networks provide on-line service and their databases can be accessed from personal computers in the office, laboratory, or library. Some... 

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