Searches were conducted at a number of project partner institutions
using a minimum of two relevant databases. Frequently, the
ISI Web of Knowledge (WoK) Science Citation Index Expanded
(1945-present) was used to search multiple databases simultaneously
(e.g. Web of Science (WoS), MEDLINE, CAB Abstracts,
BIOSIS). Similar search strategies were employed in searching for
composition and biological activity data. For instance in searching
for literature on the beneficial effects of PFS, for instance, three
groups of search terms were used: (i) biological effect terms (e.g.
‘‘cardiovascular OR hypertension); (ii) plant name (e.g. ‘‘tea OR
Camellia OR sinensis’’); (iii) human intervention study terms (e.g.
‘‘random⁄ OR control⁄ OR trial⁄). These were combined within each
area using the OR Boolean operator, and the three areas combined
with the AND Boolean operator. Thus, literature would only be
returned by the search engine if it contained one of the designated
biological effect terms AND one of the designated plant name
terms AND one of the designated human intervention study terms.
Using the WoK tool, terms were searched for within the ‘topic’
field, which includes the title, abstract, author keywords and
Keywords Plus of the paper. Wildcards (in this case⁄) were used
at the start and/or end of words or partial words to pick up additional
variations that shared common trunks; this was particularly
useful in searching for compounds within composition data
searches, e.g. ⁄catechin⁄ would pick up epicatechin, catechins etc.
In general, an English language limitation was applied to searches,
and use of the NOT operator was avoided.
Searches were conducted at a number of project partner institutionsusing a minimum of two relevant databases. Frequently, theISI Web of Knowledge (WoK) Science Citation Index Expanded(1945-present) was used to search multiple databases simultaneously(e.g. Web of Science (WoS), MEDLINE, CAB Abstracts,BIOSIS). Similar search strategies were employed in searching forcomposition and biological activity data. For instance in searchingfor literature on the beneficial effects of PFS, for instance, threegroups of search terms were used: (i) biological effect terms (e.g.‘‘cardiovascular OR hypertension); (ii) plant name (e.g. ‘‘tea ORCamellia OR sinensis’’); (iii) human intervention study terms (e.g.‘‘random⁄ OR control⁄ OR trial⁄). These were combined within eacharea using the OR Boolean operator, and the three areas combinedwith the AND Boolean operator. Thus, literature would only bereturned by the search engine if it contained one of the designatedbiological effect terms AND one of the designated plant nameterms AND one of the designated human intervention study terms.Using the WoK tool, terms were searched for within the ‘topic’field, which includes the title, abstract, author keywords andKeywords Plus of the paper. Wildcards (in this case⁄) were usedat the start and/or end of words or partial words to pick up additionalvariations that shared common trunks; this was particularlyประโยชน์ในการค้นหาสารภายในองค์ประกอบข้อมูลค้นหา เช่น ⁄catechin⁄ จะรับ epicatechin, catechins ฯลฯทั่วไป ข้อจำกัดของภาษาอังกฤษกับการค้นหาและเป็นการหลีกเลี่ยงการใช้การ
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