Quertle® - Intelligent semantic queries of MEDLINE (PubMed) and the biomedical literature

»»» NEWS: Quertle Wins NLM Contest «««

Quertle is pleased to announce that it is a winner in the first National Library
of Medicine Software Challenge on Innovative Uses of NLM Information!
(See NLM Press Release.)

Why Quertle is Different It's easy - Quertle's friendly interface makes it simple to search and refine results. It's powerful - Using advanced semantics, Quertle finds quality results, not just long lists. It's inclusive - All of PubMed PLUS full-text documents, NIH grants, news, and more.

Find Relationships, not Just Keywords

If you search for two or more terms, you will find occurrences of a conceptual relationship, not just the terms scattered within the same document.

Focus on Core Concepts

Since Quertle searches for Relationships, all the terms in your query must be found together in a meaningful way. Thus, Quertle immediately gives you results with more relevance.

Unleash the Strength of Power Terms™

Use Power Terms to search for categories of objects. For instance, you can use "$Protein" to search for any protein, rather than the occurrence of the term, "protein". View all Power Terms.

Search Full-text Documents

The Quertle search engine has been optimized to search full-text documents, including the Material and Methods section (but not the Bibliography).

Use Real Biology & Chemistry Terms

Quertle recognizes capital "TWIST" as the transcription factor (not the verb), and capital "NO" as "nitrous oxide"(not a negative). So, use proper capitalization in your query, and you won't be lost in a sea of irrelevant results.

Look for the Quertle Difference on the Results Page

» More relevant results

» Easy filtering and breadcrumb tracking

» Automatic identification of key concepts

» Single-click access to PDFs of full-text documents

WHAT IS QUERTLE? Watch this short introductory movie.
DOWNLOADS:	User Guide (Trifold)	Why You Need Quertle (Part I)	Quertle Tips (Part II)
JUST QUERTLE IT! (Searches on hot topics)	COASTER CONTEST (Don't get left out!)	QUOTE OF THE MONTH (See what they say)	FOLLOW QUERTLE

Quertle: Relationship-Driven Biomedical Search

Just Quertle It!

Coaster Contest

Let Quertle save you from
drowning in your
search results

Quote of the Month


	Quertle searches for relationships, such as "A causes B". Thus, it is best to focus your initial query on the core concepts of interest, such as "what causes B". Then, add additional terms, such as "mice", and dates when you filter the results. Authors and journals should be entered into their own search boxes. Example use this: caffeine treats migraines instead of this: caffeine treats migraines in mice 2009 Smith As you type, automatic suggestions will appear. Click on a suggestion to run that search. Or, use the arrow keys to select a search and then keep typing to add additional terms. Start typing a name to display a list of authors. As you type more, the list will update accordingly. When you see the author you want, select that name from the list. Separate multiple authors by a comma. If more than one author is entered, the results must contain ALL of the names. Start typing to display a list of journals. As you type more, the list will update accordingly. When you see the journal you want, select it from the list. Separate multiple journals by a comma. The results will be for ANY of the entered publications. This tab displays documents containing relationships that match your query. As you filter the results, the number will update. This tab displays documents simply containing your search terms, not necessarily in a meaningful relationship. As you filter the results, the number will update. To remove any filter, click its . When multiple filters are applied, all can be removed using the that appears next to this hint. Or, click on any of the filters to remove all filters below that level. If your organizational affiliation has been automatically recognized, it will be displayed. Otherwise, Log in to MyQuertle to choose your organization. Please Log in to MyQuertle to choose your organization. Your organization has not yet signed up for free linking to Quertle. Ask your librarian to request a connection. Filter documents to those that contain the additional term anywhere within the relevant text including the title, abstract, body (for full-text), MeSH terms, and chemical list. Key Concepts related to your query will appear in this list. If you used a Power Term™, the members of that class of objects appearing in the relationships will be shown. If other terms in your query represent a group of entities (such as the automatic Power Term "neurotransmitters"), these may be also be listed in separate sections. If your query contains the term "what" (for example, "what controls cell cycle"), the first set of terms listed are specifically from the portion of the relationship that might contain the "what". All queries will also have a section called "General Concepts". These are additional concepts that may be of interest. Click on a term to display only those results that contain the concept of interest. The listed concepts are derived from the most relevant results. Log in to MyQuertle to save this search. You have saved the maximum number of searches. Review your saved searches here. Click here to add the current search along with all applied filters to your MyQuertle Saved Searches. The current search along with all applied filters has been added to or already exists in your MyQuertle Saved Searches. Save searches, link to your organization's library subscriptions, choose preferences. View saved searches including the applied filters. Update your profile, including email and institution. Set optional user preferences here. Each row contains the search and applied filters you saved. Click the button to rerun the search in that row. Check the box in this column to receive a weekly Alert for new documents that meet your search criteria. Click the to remove the corresponding search from your saved search list.

Quertle: Relationship-Driven Biomedical Search

Just Quertle It!

Coaster Contest

Let Quertle save you fromdrowning in yoursearch results

Quote of the Month

Let Quertle save you from
drowning in your
search results