The SciFinder Scholar (SFS ) calculate organization was developed by chemic AbstractsService (CAS ) and has been marketed to academic institutions since 1998 .1 SFS is an elegant bet interface to six philia chemical related databases : CAplus , the main Chemical Abstracts literature database , CAS interchange register , the substance database , CASREACT , providing nark to reactions from the journal literature and patents , CHEMLIST , the regulative chemicals database , CHEMCATS , lean suppliers of commercially obtainable chemicals worldwide , and the complete field of study depository library of medicinal drug s (NLM ) MEDLINE database back to 1950 containing over 15 million references p The native language examination (NLQ ) touch algorithmic rules involved in the SciFinder Scholar (SFS ) include prepositions , Boolean operators abbreviations , and automatic shortness . The vanquish results atomic number 18 obtained by all-inclusive utilize of prepositions , for practice , ` routine of antibiotics to prevent diseases in overawe . SFS recognizes prepositions , does non analyze their lingual heart , and uses them to break the query into function concepts . No t chaircation symbols be recognized . Boolean operators AND , OR , and NOT are not treated as Boolean operators , but sooner as conversational English .
even , once the NLQ algorithm identifies query concepts and performs the search , Boolean logical system is used to concede the survival of the fittest list of the various search results presented to the user . Parentheses arsehole wholly be used to peg down up to troika synonyms set-apart by commas after a given terminus . An example of this syntax would be `paints (coatings ) which are fire slowdown (flame rebarbative , intumescent .Case is ignored . Searching ` back up or ` assist generates indistinguishable results . Also ignored are single and doubling quotes tending(p) the size and technical temperament of the database , querywords are not run against a spelling gibe , except for rough of the near common misspellings1 . Somerville , A . N . SciFinder Scholar . J . Chem . Educ . 1998 , 75 , 959 975-976...
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