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Literature Searching

Literature Searching. What to do when a “ G o o g l e ” search is not enough?. Song Yu syu@purdue.edu Phone: 496-7279 Chemical Information Specialist Assist. Prof. of Library Sciences Purdue University. To Warm Up …. Ideas, common terms that we use when doing literature searches.

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Literature Searching

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  1. Literature Searching What to do when a “Google” search is not enough? Chemical Engineering Resources at Purdue University Libraries

  2. Song Yu syu@purdue.edu Phone: 496-7279 Chemical Information Specialist Assist. Prof. of Library Sciences Purdue University

  3. To Warm Up … Ideas, common terms that we use when doing literature searches

  4. Structure of the literature and Channels of Communication TERTIARYLITERATUREInformation Retrieval

  5. Search Operators, Wildcards, and Parentheses • What are search operators? • AND, OR, NOT, SAME, NEAR • What are wildcards? • ? = one character • E.g. EN?OBLAST will search ENDOBLAST and ENTOBLAST • * = zero to many characters • E.g. Gene* will search Gene, Genes, General, Generation • Combination of ? and * • E.g. CH?M* will search CHEMISTRY, CHEMIST, CHEMICAL, CHEMIE, CHIMICA … • Parentheses • (A or B) and C, (B and C) not A A B C Note: different databases have different wildcards. Check their Help file to find out what to use.

  6. Author Title Source/journal Enumeration (volume/issue) Chronology (date) Pagination What is in a citation? Bibliographic Information Cui, Yi; Lieber, Charles M.. “Functional nanoscale electronic devices assembled using silicon nanowire building blocks." Science 291:5505 (2001): 851-3.

  7. Cited/Citing Reference ?@#&! • Linking to the original cited paper • Linking to papers which cite the same paper (Time Cited) • Finding related papers 1994 1992 1991 1988 1987 1984 1982 1957 1988 Known Paper Cited Paper 1957 New paper retrieved via cited reference searching 1987

  8. Major Databases in Chemical Engineering • COMPENDEX (OVID) • SciFinder Scholar (CAS) • Web Of Science (ISI)

  9. Major Databases in Chemical Engineering • COMPENDEX (OVID) Engineering and technical literature, as well as related fields in science and management. The records in the database are drawn from over 2,600 published journals, conference proceedings and individual conference papers, technical reports, monographs, and other materials.

  10. Major Databases in Chemical Engineering • SciFinder Scholar (CAS) Collection of Chemical Databases: CAPlus, CASREACT, CHEMCATS, CHEMLIST, Registry, Medline Chemistry Plus a Whole Lot More! Agriculture Science / Biology and Life Sciences / Engineering Sciences / Food Sciences / General Chemistry / Geological Sciences / Material Sciences / Medical Sciences / Physics / Polymer Science

  11. Major Databases in Chemical Engineering • Web Of Science (ISI) Accesses multidisciplinary databases of bibliographic information from thousands of scholarly journals. The databases are indexed so you can search for specific articles by subject, author, journal, and/or author address. You can also search the databases for articles that cite a known author or work.

  12. Access to the Databases • http://www.lib.purdue.edu/eresources/index.html choose “By Title” • COMPENDEX (OVID) • Web based, need your Purdue ID • SciFinder Scholar (CAS) • Server/Client based • Windows Terminal Server • To download the primary client software, go to http://www.lib.purdue.edu/wts • Java client can not print and save your searches • Web Of Science (ISI) • IP based • Off campus access • Libraries Proxy server • http://www.lib.purdue.edu/proxy

  13. SciFinder Scholar Coverage back to 1907 by one search! • CAplus. 1907 ~, +21.5 mil documents from +9000 journals--Updated daily with new citations, weekly with indexed records • CASREACT. 1974+, +6 mil single and multi-step reactions • CHEMCATS. +5.3 mil Commercial chemicals • CHEMLIST. over 227,000 Regulated chemicals • Registry. 1965+, 20.3 mil substances, 21.8 mil biosequences • Medline. 1958+, 11 mil biomedical citations (including OLDMEDLINE)

  14. Web of Science • 8,500 peer-reviewed journals in science, social science, arts and humanities worldwide • Science Citation Index (6014 Journal titles) • 230 Disciplines • 1350 in chemistry, 122 in chemical engineering • Update weekly • Purdue has access from 1977

  15. Compendex • Index +5000 journals world wide • 1987 – • Update every week by EI, updated monthly by OVID.

  16. Example One • Find the review articles written in English on gold nanoparticles for catalysts • SciFinder Scholar • Topic search: gold nanoparticles for catalyst • Refine by Document type, and Language • Got 13 review articles • Check the citing articles for Shipway, Andrew N.; et al. Nanoparticles as structural and functional units in surface-confined architectures. -> 13

  17. Example One • Find the review articles written in English on gold nanoparticles for catalysts • Web of Science • General search in Topic: (gold and nanoparticl*) and cataly* • Limited by Language and Document type • Got 13 review articles

  18. Example One • Find the review articles written in English on gold nanoparticles for catalysts • Compendex • Search (Gold or Au), nanopartic$, and catalys$ seperately • Combine them together • Limited to Journal articles/English (40) • Limited to Research Review • Got 0 review articles

  19. Further Investigation • If SciFinder Scholar indexes more journals and cover more years than Web of Science, why my search retrieve the same number of articles? Crooks, RM, Zhao MQ, et al. Accounts of Chemical Research 34(3): 181-190. The most cited review in Web of Science, is also in SciFinder Scholar!!

  20. SciFinder Scholar Record: Dendrimer-Encapsulated Metal Nanoparticles: Synthesis, Characterization, and Applications to Catalysis. Crooks, Richard M.; Zhao, Mingqi; Sun, Li; Chechik, Victor; Yeung, Lee K. Department of Chemistry, Texas AM University, College Station, TX, USA. Accounts of Chemical Research (2001), 34(3), 181-190. CODEN: ACHRE4 ISSN: 0001-4842. Journal; General Review written in English. CAN 134:168789 AN 2000:887031 CAPLUS Abstract A review with 55 refs. that reports the synthesis and characterization of dendrimer-encapsulated metal nanoparticles and their applications to catalysis. These materials are prepd. by sequestering metal ions within dendrimers followed by chem. redn. to yield the corresponding zerovalent metal nanoparticle. The size of such particles depends on the no. of metal ions initially loaded into the dendrimer. Intradendrimer hydrogenation and carbon-carbon coupling reactions in water, org. solvents, biphasic fluorous/org. solvents, and supercrit. CO2 are also described. Web of Science Record: Dendrimer-encapsulated metal nanoparticles: Synthesis, characterization, and applications to catalysisCrooks RM, Zhao MQ, Sun L, Chechik V, Yeung LKACCOUNTS OF CHEMICAL RESEARCH 34 (3): 181-190 MAR 2001 Document type: Review    Language: English    Cited References: 53Times Cited: 61Abstract:This Account reports the synthesis and characterization of dendrimer-encapsulated metal nanoparticles and their applications to catalysis. These materials are prepared by sequestering metal ions within dendrimers followed by chemical reduction to yield the corresponding zerovalent metal nanoparticle. The size of such particles depends on the number of metal ions initially loaded into the dendrimer. Intradendrimer hydrogenation and carbon-carbon coupling reactions in water, organic solvents, biphasic fluorous/organic solvents, and supercritical CO2 are also described. KeyWords Plus:SUPERCRITICAL CARBON-DIOXIDE, SURFACE-CONFINED MONOLAYERS, PHASE PROBE MOLECULES, POLY(AMIDOAMINE) DENDRIMERS, STARBURST DENDRIMERS, GOLD, WATER, NANOCLUSTERS, TEMPLATE, ELECTROCHEMISTRY Addresses:Crooks RM, Texas A&M Univ, Dept Chem, POB 30012, College Stn, TX 77842 USATexas A&M Univ, Dept Chem, College Stn, TX 77842 USA

  21. Save Search/Results • COMPENDEX (OVID) • Run Saved Search/Save Search History/Delete Search • SciFinder Scholar (CAS) • Save only to computer drives with a “$” sign!! • Web Of Science (ISI) • Mark and Submit Marks • Marked List • Save Search/Run saved search

  22. Full Text? • COMPENDEX (OVID) • No full text available from the database • Link to Purdue catalog, can link to full text then • SciFinder Scholar (CAS) • Click the computer icon • Choose the purple colored options • Web Of Science (ISI) • Selected full text available • Double check in Purdue Catalog!!

  23. Full text journal articles available through Purdue’s subscription All full text articles The full text articles you can get if you only check the full text links in the database Full text articles that covers in the database Full Text?

  24. Comparing Results of Example One • Total review articles found 25. • 13 (52%)in SciFinder Scholar • 13 (52%) in Web of Science • 1 (4%) overlap in both • 0 in Compendex • Citing papers for Crooks, RM, Zhao MQ, et al. Accounts of Chemical Research 34(3): 181-190 • Total found 68 • 63 (93%) in Web of Science • 57 (84%) in SciFinder Scholar • 52 (83%) overlap in both

  25. More on Cited Reference Search • Web of Science also has a separate Cited Reference Search screen. Sometimes you will pick up more cited references for an article. • C.D. Nobes and A. Hall, published in Cell, Volume 81 (1) 53-62, 7 April 1995

  26. Example Two • Find Prof. Lee’s publication in recent years • SciFinder Scholar • Author search: Lee Gil, choose all possible entries • Refine by Databases (CAplus only) • Analyze by Company/Organization • Found 5 publications from Purdue

  27. Example Two • Find Prof. Lee’s publication in recent years • Web of Science • Search Author: Lee GU and Address: Purdue • Got 8 results

  28. Example Two • Find Prof. Lee’s publication in recent years • Compendex • Author search of Lee G or Lee G U or Lee Gil or Lee Gil U • Combine with Institution search: purdue -> 0 (!!)

  29. Conclusion For a same search … • The search strategies are different among three databases • The retrieved results are quite dissimilar • Even when searching in one database, various approaches will retrieve diverse results

  30. Conclusion That means to do a comprehensive literature search … • Consult as many resources as possible (including “the Web”, your advisor, librarians) • Search critically. Use various combinations of search terms and search strategies as necessary • Learn while you are searching. Adjust your searches accordingly • Search independently and consistently • Manage your search results by using the tool from the databases

  31. A Few More Words • You can not find everything on the web • Always think what you might miss by consulting to one source • E-journals are NOT free, so are the databases you use in the library • Science and technology didn’t start from 1907, or 1977, or 1986.

  32. Question Time

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