Literature Searching

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Literature Searching

• What to do when a Google search is not enough?

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• Song Yu
• syu_at_purdue.edu
• Phone [phone]
• Chemical Information Specialist
• Assist. Prof. of Library Sciences
• Purdue University

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To Warm Up

• Ideas, common terms that we use when doing
  literature searches

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Structure of the literature and Channels of
Communication
TERTIARYLITERATUREInformation Retrieval
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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.
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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
2915505 (2001) 851-3.
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Cited/Citing Reference ?_at_!

• 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
1957
1982
1988
Known Paper
Cited Paper
1957
New paper retrieved via cited reference searching
1987
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Major Databases in Chemical Engineering

• COMPENDEX (OVID)
• SciFinder Scholar (CAS)
• Web Of Science (ISI)

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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.
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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
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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.
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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

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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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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

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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
• 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. -gt 13

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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

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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!!

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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 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 134168789 AN 2000887031 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 53    Times Cited 61   
AbstractThis 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
PlusSUPERCRITICAL CARBON-DIOXIDE,
SURFACE-CONFINED MONOLAYERS, PHASE PROBE
MOLECULES, POLY(AMIDOAMINE) DENDRIMERS, STARBURST
DENDRIMERS, GOLD, WATER, NANOCLUSTERS, TEMPLATE,
ELECTROCHEMISTRY AddressesCrooks RM, Texas AM
Univ, Dept Chem, POB 30012, College Stn, TX 77842
USATexas AM 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 Of Science (ISI)
• Mark and Submit Marks
• Marked List
• Save Search/Run saved search

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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!!

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Full Text?
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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

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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

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Example Two

• Find Prof. Lees 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

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Example Two

• Find Prof. Lees publication in recent years
• Web of Science
• Search Author Lee GU and Address Purdue
• Got 8 results

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Example Two

• Find Prof. Lees 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 -gt 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

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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

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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 didnt start from 1907, or
  1977, or 1986.

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Question Time