Frustrated!!! Can't find it in PubMed?

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InformationScientist's picture
Frustrated!!! Can't find it in PubMed?

Think you're a PubMed expert? Do you know about Single Citation Matcher? If not, ask your reference librarian to show you the next best thing to an iPod.

Did you know PubMed doesn't index every scientific or medical journal? Scopus and Web of Science are two other biomedical literature databases that can be useful. They also include meeting abstracts and proceedings, which PubMed does not.

Check with your organization's reference librarian to learn how to access these databases and how to more effectively search them. They also conduct literatures searches, set up research alerts, aid in managing your overload of information, among numerous other services.

Omai's picture
I've also heard that Web of

I've also heard that Web of Science and Scopus are quality search engines for biomedical journals.

Does anyone have any experience with these?


mchinmoyee's picture
Scopus is good !

Scopus is good !

gswetha's picture
scopus is indeed good. the

scopus is indeed good. the only disadvantage being that its a paid service.

marcus muench
marcus muench's picture
I recently had free access to

I recently had free access to Scopus and found it to be good, although I didn't get a chance to explore all aspects of the service.

Scopus also has a different citation ranking system from ISI's impact factor that I thought was interesting. They take into account citations and number of papers published. Simply, they rank all papers published by an author over a given period of time from highest cited paper to lowest. Then they plot this data with number of citations on the y-axis and number of papers on the x-axis. A line is drawn at y=x, or citations = number of papers. This is the h-index (Wikipedia has a more thorough explanation). The higher the h-index the better.

The h-index reminds me roughly of calculating the median, whereas impact factor is more like a mean. For instance, if someone has published 3 papers: one in Science with 50 citations and two in more specific journals with 2 and 1 citations. The h-index would be 2. You would get the same h-index if the first paper had been cited only twice. However, the impact factor of that author would be highly influenced by that one Science paper. In other words, the h-index depends on quality and quantity, whereas impact factor can be skewed more by outliers. Neither method is correct, just different ways of looking at things.

My university has access to ISI's web of Knowledge. I think it is most useful in looking for papers that have cited an older paper your interested in. I've found papers of interest that way that haven't come up in other searches.

I still do most of my searches through PubMed, but I generally use my reference manager (Sente) to perform the more complex searches rather than through the typical web access.