AND | Retrieves items that contain both terms. Good for combining topics to narrow a search. | retina AND regeneration |
OR | Retrieves items that contain at least one of the terms. Expand a search by allowing for synonyms. | regeneration OR regrowth |
* | Retrieves word variants, such as regenerate, regeneration, regenerated | regenerat* |
" " | Retrieves the exact phrase contained by the quotation marks. | "retinal neuron" |
( ) | Tells search system how to combine terms and in which order. Article needs to mention "retina" and EITHER regenerat* OR regrow*. |
retina AND (regenerat* OR regrow*) |
Example in Web of Science. Looking for alternatives to a skin sensitivity assay on live animals.
Search #1 - protocol concepts:
(skin OR dermal) AND (sensitiv* OR sensitiz* OR sensitis*) AND (assay* OR model*)
Search #2 - possible alternatives:
(simulat* OR silico OR artificial* OR digital* OR virtual* OR cadaver* OR “non animal” OR “in vitro”)
Combine the two searches with AND.
Database filters help you narrow your search.
Most databases permit filtering by:
Filter options are typically on the left side of the search results screen.
In Web of Science and Embase, use NEAR to require that two words appear within a few words of each other in the title or abstract. Specify how close they should be using the format NEAR/#.
Embase example:
(lung OR pulmonary) NEAR/3 fibrosis
Web of Science example:
TS=((lung OR pulmonary) NEAR/3 fibrosis)