Information Sources in Agriculture - University of Saskatchewan

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20 Φεβ 2013 (πριν από 4 χρόνια και 5 μήνες)

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26/08/05

Developing Search Strategies

Jill Crawley
-
Low,

Veterinary Medicine Library,

University of Saskatchewan



26/08/05

Developing Strategies for
Searching Electronic Resources



clearly define the question & concepts


consider the vocabulary


organize the terms


construct the search statement


decide which databases to search


execute the search



26/08/05

Clearly Define the Question



example of a precisely worded question:


“are there articles on mycorrhizal symbioses
in vascular plants written in the last 5 years?”

26/08/05

Identify the Main Concepts in
Your Question


“are there articles on mycorrhizal symbioses
in vascular plants written in the last 5 years?”



mycorrhizal symbioses


mycorrhizas


vascular plants


2000+

26/08/05

Consider the Vocabulary


forms of keywords


mycorrhiza,
mycorrhizal, mycorrhizas



synonyms


mycoflora, fungal flora



truncation


? replaces one character


* replaces more than one character


26/08/05

Organize the Terms


free
-
text or index searching


Boolean operators (AND, OR, NOT)


Parentheses

26/08/05

Boolean Operators


most search engines don’t allow natural
language
-

use keywords or key phrases and
combine them with Boolean operators



and retrieves records containing both terms


(narrows a search)



or retrieves records containing either term



(broadens a search)

26/08/05

Parentheses


allow you to control the order in which
keywords or key phrases are searched



all search statements containing “and”
plus “or” in the same sentence must use
parentheses to control search order

26/08/05

Free Text or Index Searching



enter keywords or phrases


e.g. vascular plants or mycorrhiza



search for terms in specific fields


e.g. king in au, vascular plants in ti


26/08/05

Construct the Search Strategy


“are there articles on
mycorrhizas or mycorrhizal
symbioses in vascular plants
written in the last 5 years?”




(mycorrhizas or mycorrhizal
symbioses) and vascular plant?
and py>=2000

26/08/05

Determine Which Databases to
Search


Microbiology Abstracts
: Algology, Mycology & Protozoology


references in biological life sciences, medicine, and microbiology


http://www.csa.com/factsheets/microbiology
-
c
-
set
-
c.php



Web of Science

-

citation databases contain the references cited by
the authors of the articles, also use these references to do cited
reference searching
-

find articles that cite a previously published
work



http://scientific.thomson.com/media/scpdf/ba_qrc_11_15.pdf



Biological Abstracts

-

coverage of worldwide journal literature in
the life sciences including agriculture, biochemistry, biotechnology,
ecology, immunology, microbiology, neuroscience, pharmacology,
public health, and toxicology
http://www.biosis.org/media/pdf/qrc/BIOSIS_on_SilverPlatter_QRC.
pdf