PubMed has introduced a new type of link called “Articles Frequently Viewed Together” to assist with locating important articles on a given topic. For some PubMed abstracts, this feature will appear in the “Related Information” section in the right column. Currently, only 1.3 million out of the 24 million records in PubMed have this link. The calculation is based on anonymous click data for the last year, so older articles will be especially underrepresented. To find all articles with these relationships, search PubMed with the query “pubmed_pubmed_alsoviewed[filter]” and add additional terms to narrow the focus to your area of interest.
Archive for the ‘Search Tools’ Category
Registration and agenda information for the National Library of Medicine’s third annual DailyMed/RxNorm Jamboree Workshop is now available. The Jamboree is a free public meeting to be held on September 24, 2015, 9:30 am to 4:15 pm EDT, at the Lister Hill Auditorium on the NLM campus in Bethesda, MD. The session will also be webcast and archived for future viewing. Registration is required for attendance. Since 2015 marks the 10th anniversary of DailyMed, the meeting will feature a retrospective look at how industry has made use of DailyMed during that time.
Featured speakers will include representatives from the federal government, industry, academia and non-profit sectors. Speakers from the U.S. Food and Drug Administration, U.S. Pharmacopeial Convention, and Avalere Health will talk about biosimilars naming. Ed Millikan, representing the American Society of Health-System Pharmacists, will present an extended look at Risk Evaluation and Mediation Strategies. The meeting emphasis is on practical and novel ways to use and understand this free drug information, which is produced and consumed by a number of federal agencies.
The National Library of Medicine’s (NLM) Developmental and Reproductive Toxicology (DART) is a bibliographic resource on NLM’s Toxicology Data Network (TOXNET). It covers teratology and other aspects of developmental and reproductive toxicology and includes more than 200,000 references to literature published since the early 1900s. DART may be searched using MeSH terms/keywords, title words, chemical name, Chemical Abstracts Service Registry Number (RN), and author. Search results are displayed in relevancy ranked order, but may also be sorted by publication date, entry month, author, or title.
DART was initially funded by the U.S. Environmental Protection Agency, the National Institute of Environmental Health Sciences, the National Center for Toxicological Research of the Food and Drug Administration, and NLM. Some meeting abstracts and non-MEDLINE literature are historically included in DART; however, new citations come only from PubMed, based on a search strategy profile. New references are added weekly.
The U.S. Department of Health and Human Services launched the first online collection of the federal resources and capabilities available to mitigate the health impacts of emergencies. The HHS Office of the Assistant Secretary for Preparedness and Response (ASPR) sponsored the HHS Response and Recovery Resources Compendium to aid state, tribal, territorial, and local officials in health and emergency management as they guide communities in responding to and recovering from disasters.
The compendium offers an easy-to-navigate, comprehensive, web-based repository of HHS products, services and capabilities available to state, state, tribal, territorial, and local agencies before, during, and after public health and medical incidents. The information spans 24 categories, and each category showcases the relevant disaster resources available from HHS and partner agencies, a brief description of each resource and information on accessing each one. Categories range from patient movement to hospital care and from situational awareness to decontamination. Resources include platforms such as GeoHEALTH and the HHS emPOWER Map that use Geographic Information System capabilities to support health response as well as consultation services, such as emergency planning, disease surveillance and tracking, and food, drug and device safety. Resources also include personnel, such as medical staff from the U.S. Public Health Service and National Disaster Medical System who can deploy to communities to augment local hospital, shelter or public health staff. The compendium will be updated regularly and expanded as federal agencies add products, capabilities and services to help communities prepare for, respond to, and recover from the health impacts of disasters.
The National Library of Medicine (NLM) announces the release through its Digital Collections of nearly 200 items uniquely held by the NLM and printed in the English-speaking world from 1552 to 1800. NLM’s participation in the English Short Title Catalog (ESTC) helped staff identify the uniqueness of these items. The ESTC is a union catalog managed by the British Library which lists books, pamphlets, and other ephemeral material printed in English-speaking countries from 1473 to 1800, containing over 480,000 items reported by over 2,000 libraries from around the world, including the NLM, British Library, Folger Shakespeare Library, and Library of Congress. The NLM holds over 9,000 ESTC items, the most for any medical library in the world.
The NLM’s new digital collection of unique English short titles includes:
- The Anatomy of Melancholy by Robert Burton, published in London in the year 1660, and one of the first books on the issue of depression
- the anonymously penned, Treasure for Poore Men, a popular manual published in London in 1565 and containing recipes such as “A medicine for the eye if it be hurte with a thorne” and “a migraine in the head”
- reports about various local hospitals and other charitable organizations in Britain during the 18th century, including Guy’s Hospital in London (1734), Lying-In Charity for Delivering Poor Women at their Own Habitations (1772), and the Asylum for Orphan Girls (1786)
- pamphlets advertising patent medicines and popular guides to health and reproduction.
As with all printed material added to NLM’s Digital Collections, these items will be included in the Internet Archive generally, and as part of the Medical Heritage Library, an international collaboration which the NLM has supported since 2010 to provide free access to historical medical literature.
The NLM’s Digital Collections currently encompass over 14,000 items spanning eight centuries and including monographs, serials, videos, and ephemeral literature. It complements PubMed Central® (PMC), NLM’s free, full-text archive of biomedical and life sciences journal literature, now including 3.5 million articles spanning the early nineteenth-century to the present day. Additionally, as part of its ongoing initiative to make its historical collections widely known and available, the NLM also announces a three-year cooperation with the University of St. Andrews to identify and preserve the rarest European materials in the NLM’s historical collections. The University of St. Andrews hosts the Universal Short Title Catalog (USTC), funded by the Andrew J. Mellon Foundation. The USTC is a unique collective database which seeks to include all books published in Europe between the invention of printing and the end of the sixteenth century.
- Valid chemical names and CAS RN completions are displayed as the user types in the search box. If no data are found, suggestions are provided.
- The ChemIDplus Registry Number field now includes the FDA UNII code.
- The InChIKey is now directly searchable. It can be used for the interchange of structural data and as input for search engines such as Google.
- The ChemIDplus Formula field now accepts molecular formulas with spaces between elements and their counts and without the hyphens previously required.
Examples of these new features may be viewed at the ChemIDplus Help pages. ChemIDplus is a free, web search system that provides access to the structure and nomenclature authority files used for the identification of chemical substances cited in National Library of Medicine (NLM) databases, including the TOXNET® system. ChemIDplus also has structure searching and direct links to resources at NLM, federal agencies, U.S states, and scientific sites. The database contains more than 400,000 chemical records, of which over 300,000 include chemical structures.
A common problem encountered by course designers is finding the ideal image for a lecture or presentation that is not subject to copyright restrictions. But now Stanford University’s Lane Medical Library has announced the development of a new tool, Bio-Image Search, that may make the process easier. This resource provides results of images and diagrams exclusively from medical and scientific organizations, grouped by the degree of restriction to their republication. Anyone with Internet access may use Bio-Image Search. It has access to more than 2 million images and counting!
The July 2015 issue of The Nation’s Health features a cover story on the link between climate change and health, new U.S. government initiatives aimed at protecting communities from the health impacts of climate change, and the effort to reframe climate change as an urgent public health issue. These initiatives are meant to help Americans understand climate change as not just an environmental issue, but also an important health issue.
The National Library of Medicine (NLM) provides many sources of information to assist health professionals with the knowledge and resources they need to assess who is most vulnerable to the health effects of climate change, and teach patients how to minimize the impacts. The Division of Specialized Information Services (SIS) Arctic Health website is a central source for information on diverse aspects of the Arctic environment and the health of northern peoples. The site gives access to evaluated health information from hundreds of local, state, national, and international agencies, as well as from professional societies and universities. For example, the Arctic Health Climate Change page provides links to websites, publications, and multimedia presentations covering the impacts of climate change on the health, activities, and well-being of people in the Arctic. It includes climate-change observations from both the scientific-research and the traditional-knowledge points of view.
The SIS Environmental Health and Toxicology website features Enviro-Health Links – Climate Change and Human Health. This page provides a wealth of environmental health-related web resources from the U.S. government and other trusted sources focused on climate change and health. Resources include links to information about specific impacts on agriculture, extreme weather, general health, infectious disease, population displacement, preparedness and security, and water quality and scarcity. In addition to topic-related searches of NLM resources, the page offers overview materials, glossaries, information on law, policy, and regulation, links to blogs, news, podcasts and video, and educational material such as the NLM’s Environmental Health Student Portal.
One of the National Library of Medicine’s most versatile online historical resources is an interactive tool for locating history of medicine collections worldwide: the Directory of History of Medicine Collections. The Directory connects scholars with literature, artifacts, and unique collections in medical history and allows travelers and explorers to discover medical libraries, archives, and museums nearby and around the world. The first edition of the Directory was established in 1990 with 32 initial entries. Each year thereafter, the number of collections continued to grow, and today it contains more than 200 and growing. In 2001, the printed Directory was adapted for the Web, bringing direct access to this resource to the world. The types of collections listed in the Directory range from single subject specialties to those with a general history of medicine coverage.
The Directory underwent a major transformation in 2010 with the development of a fully keyword searchable database. And recently, an interactive map has been added, which links users to collections geographically. Now you can locate collections on the map by selecting the continent from the pull-down menu. You can also drag the map to see what collections are represented internationally. On June 9 a one-hour webinar presentation with the features of the Directory was hosted by the NN/LM Middle Atlantic Region. The session will be publicly archived for future viewing.
NLM has been recording geographic locations and publications types in the MARC21 fields 651 and 655 respectively since 1999 to match indexing practices in subject assignment. This differs from LC’s practice of putting geographic locations in 650 $z and publication types in 650 $v. In 1999, 80% of medical libraries responding to the announcement of this practice being adopted at NLM, indicated that subjects in this format would be difficult to incorporate in their OPAC. NLM therefore continued to provide a specially programmed output with a traditional subject string of 650 $a $x $z $v for subscribers to Catfile. In 2005, NLM once again surveyed the community and proposed discontinuing the special programming to create traditional subject strings and to distribute records as they appear in LocatorPlus. At that time, a small majority of libraries were in favor of such a proposal; however, those who were opposed were very passionate about the issue and made some compelling arguments for keeping the strings. NLM made some minor changes to the record distribution programs at that time to ease some of the complexities its catalogers had been encountering in trying to code subjects for proper output, but continued to output traditional subject strings.
NLM now believes that the environment has changed enough to once again propose discontinuing the practice of creating artificial subject strings for subscribers to Catfile. Rather than traditional OPACs, many libraries are using discovery systems that search across different input streams and provide faceted searching options, and the library community is planning to make much more use of linked data, particularly with the future adoption of BIBFRAME. Long subject strings do not work well in a linked data environment, and many libraries are breaking up the traditional LCSH subject string into its component parts using the FAST vocabulary. MeSH has recently been released in RDF triples that correspond to data in 650 $a and $x, 651 or 655 fields. NLM believes the time is now appropriate to stop creating artificial subject strings and distribute NLM records exactly as they appear in the LocatorPlus database, which would mean that libraries that take copy from both NLM and OCLC would not have to edit one form or another to have consistency in their catalogs.
NLM is asking the medical library community for comments regarding what the effect would be on your institution if NLM were to discontinue distributing its MARC cataloging bibliographic records with artificially reconstructed subject strings. Records in MARC format would continue to have MeSH headings combined with the appropriate topical subheadings (650 $a $x), but geographic locations, and publication types would be carried in separate fields in the record, rather than as subfields of the MeSH heading. This would mean that records distributed to bibliographic utilities and other licensees would be identical to the records in LocatorPlus.
Please send your comments by August 31, 2015 to Diane Boehr, Head, Cataloging and Metadata Management Section at NLM. NLM will announce the final decision on whether or not to implement this change by September 30, 2015. Any changes to distribution files will not occur until calendar year 2016.
Example of current practice:
In NLM database:
650 22 $a Cross Cultural Comparison
650 22 $a Health Policy
Subject strings created for distribution:
650 22 $a Cross Cultural Comparison $z Africa $v Congresses
650 22 $a Health Policy $z Caribbean Region $v Congresses