Literature Searching What to do when a “Google� search is not enough?
Chemical Engineering Resources at Purdue University Libraries
Song Yu syu@purdue.edu Phone: 496-7279 Chemical Information Specialist Assist. Prof. of Library Sciences Purdue University
Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
To Warm Up ‌ Ideas, common terms that we use when doing literature searches
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Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
Structure of the literature and Channels of Communication
TERTIARY LITERATURE Information Retrieval Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
Search Operators, Wildcards, and Parentheses ► ►
►
What are search operators? AND, OR, NOT, SAME, NEAR What are wildcards? A B ? = one character ► E.g. EN?OBLAST will search ENDOBLAST and ENTOBLAST C * = 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 … Note: different databases Parentheses have different wildcards. (A or B) and C, (B and C) not A Check their Help file to find out what to use.
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What is in a citation? ► Author ► Title ► Source/journal
► Enumeration
(volume/issue) ► Chronology (date) ► Pagination
Bibliographic Information Cui, Yi; Lieber, Charles M.. “Functional nanoscale electronic devices assembled using silicon nanowire building blocks." Science 291:5505 (2001): 851-3. Spring 2003
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Cited/Citing Reference ?@#&! â–ş Linking
paper
to the original cited
1994 1992
â–ş Linking
to papers which cite the same paper (Time Cited)
1991
1988 1987
â–ş Finding
1984
related papers 1982
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1988
Known Paper
1957
Cited Paper
1987
1957
New paper retrieved via cited reference searching
Major Databases in Chemical Engineering ► COMPENDEX
(OVID) ► SciFinder Scholar (CAS) ► Web Of Science (ISI)
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Major Databases in Chemical Engineering â–ş 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.
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Major Databases in Chemical Engineering â–ş 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 Spring 2003
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Major Databases in Chemical Engineering â–ş 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.
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Access to the Databases ► ► ►
► ►
Spring 2003
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 Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
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)
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Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
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 Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
Compendex ► Index
+5000 journals world wide ► 1987 – ► Update every week by EI, updated monthly by OVID.
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Example One ► Find
the review articles written in English on gold nanoparticles for catalysts SciFinder Scholar 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 ►Topic
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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
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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 Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
Further Investigation â–ş
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!!
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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 Web of Science Record: of Chemistry, Texas AM University, College Station, TX, USA. Accounts of Chemical Research Dendrimer-encapsulated nanoparticles: characterization, and applications (2001), 34(3), 181-190. CODEN: ACHRE4metal ISSN: 0001-4842.Synthesis, Journal; General to catalysis CAPLUS Review written in English. CAN 134:168789 AN 2000:887031
Crooks RM, Zhao MQ, Sun L, Chechik V, Yeung LK ACCOUNTS OF CHEMICAL RESEARCH Abstract 34 (3): 181-190 MAR 2001 Document type: the Review Language: English Cited A review with 55 refs. that reports synthesis and characterization of References: dendrimer- 53 Times Cited: 61 encapsulated metalAbstract: nanoparticles and their applications to catalysis. These This Account reports the synthesis and characterization of dendrimer-encapsulated metal materials are prepd. by sequestering metal ions within dendrimers followed by nanoparticles and their applications to catalysis. These materials are prepared by sequestering chem. redn. to yield the corresponding zerovalent metal nanoparticle. The size of metal ions within dendrimers followed by chemical reduction to yield the corresponding such particles depends on themetal no. ofnanoparticle. metal ions initially the dendrimer. zerovalent The sizeloaded of suchinto particles depends on the number of metal ions Intradendrimer hydrogenation and carbon-carbon coupling reactions in water, org. initially loaded into the dendrimer. Intradendrimer hydrogenation and carbon-carbon coupling solvents, biphasic fluorous/org. solvents, andsolvents, supercrit. CO2 are also described. reactions in water, organic 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 USA Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA
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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
Spring 2003
Of Science (ISI)
Mark and Submit Marks Marked List Save Search/Run saved search Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
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 Spring 2003
check in Purdue Catalog!! Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
Full Text? Full text journal articles available through Purdue’s subscription
All full text articles
Full text articles that covers in the database
Spring 2003
The full text articles you can get if you only check the full text links in the database
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
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
Spring 2003
Total found 68 63 (93%) in Web of Science 57 (84%) in SciFinder Scholar 52 (83%) overlap in both Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
More on Cited Reference Search â–ş Web
of Science also has a separate Cited Reference Search screen. Sometimes you will pick up more cited references for an article. â–ş C.D. Nobes and A. Hall, published in Cell, Volume 81 (1) 53-62, 7 April 1995
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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
Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
Example Two ► Find
Prof. Lee’s publication in recent years
Web of Science ►Search
Author: Lee GU and Address: Purdue ►Got 8 results
Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
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 (!!)
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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 Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu
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 Spring 2003
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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. Spring 2003
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Question Time
Spring 2003
Mellon Library of Chemistry Purdue University Libraries chemlib@purdue.edu