Find journal articles on many topics in Science.

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Worldwide Science Organization

http://worldwidescience.org/

One-stop Searching of WorldWideScience Sources

WorldWideScience.org is a global science gateway connecting you to national and international scientific databases and portals. WorldWideScience.org accelerates scientific discovery and progress by providing one-stop searching of global science sources. The WorldWideScience Alliance , a multilateral partnership, consists of participating member countries and provides the governance structure for WorldWideScience.org.

Directory of Open-Access Journals

http://www.doaj.org/

Welcome to the Directory of Open Access Journals. This service covers free, full text, quality controlled scientific and scholarly journals. We aim to cover all subjects and languages. There are now 3587 journals in the directory. Currently 1239 journals are searchable at article level. As of today 206907 articles are included in the DOAJ service.

Agriculture and Food Sciences
Arts and Architecture
Biology and Life Sciences
Business and Economics
Chemistry
Earth and Environmental Sciences
General Works
Health Sciences
History and Archaeology
Languages and Literatures
Law and Political Science
Mathematics and Statistics
Philosophy and Religion
Physics and Astronomy
Science General
Social Sciences
Technology and Engineering

Journal of Biology

http://jbiol.com/home/

Journal of Biology is the premier biology journal published by BioMed Central, the publisher of Genome Biology and the BMC series. Journal of Biology publishes research articles of exceptional interest, with associated commentary, and provides immediate free access to all articles online.

High wire press

http://highwire.stanford.edu/

What is HighWire Press?

A division of the Stanford University Libraries, HighWire Press hosts the largest repository of high impact, peer-reviewed content, with 1171 journals and 4,830,779 full text articles from over 140 scholarly publishers. HighWire-hosted publishers have collectively made 1,920,335 articles free . With our partner publishers we produce 71 of the 200 most-frequently-cited journals.

J Scholarship

https://jscholarship.library.jhu.edu/

JScholarship is designed to gather, distribute, and preserve digital materials related to the Johns Hopkins research and instructional mission.

Medscape

http://www.medscape.com/home

Medscape's Mission

To provide clinicians and other healthcare professionals with the most timely comprehensive and relevant clinical information to improve patient care;

To make the clinician's task of information gathering simpler, more fruitful, and less time-consuming; and

To provide physicians with the educational tools needed to stay current in their practice.

Medscape Content

Medscape offers specialists, primary care physicians, and other health professionals the Web's most robust and integrated medical information and educational tools. After a simple, 1-time, free registration, Medscape automatically delivers you the specialty site that best fits your profile. You can also change your Medscape homepage to any of our other specialty and profession sites at any time.

E-Print Network

E-PRINT Network, U.S. Department of Energy Score: 70.3 U.S. Department of Energy's searchable, browsable database of full-text eprints. Eprints are "scientific or technical documents circulated electronically to facilitate peer exchange and scientific advancement" including pre-publication drafts of journal articles (preprints), scholarly papers, technical communications, or similar documents.
E-PRINT network "is a gateway to over 25,000 Web sites and databases worldwide, containing e-prints in basic and applied sciences, primarily in physics but also including subject areas such as chemistry, biology and life sciences, materials science , nuclear sciences and engineering, energy research, computer and information technologies, and other disciplines of interest to DOE." [ More Info... ] [ Comment on this resource ]  

PubMed

http://www.pubmedcentral.nih.gov/

PubMed Central (PMC) is the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature.

General Medical Information Sites on the Invisible Web

• The Center for Disease Control and Prevention : Enormous amount of medical information here, from genetics to environmental health.
• Medical Library : "provides patients with reliable health care information from introductory to advanced texts."

• NOAH : "provides access to high quality full-text consumer health information in English and Spanish that is accurate, timely, relevant and unbiased."
• National Library of Medicine Gateway : just what it sounds like; a jumping off point to a variety of medical information databases.
• Medscape : Medscape "offers specialists, primary care physicians, and other health professionals the Web's most robust and integrated medical information and educational tools."
• Medicare has a very useful database in which you can search for a good nursing home . Search by geography, proximity, or you can search by name.
• The National Library of Medicine , "the world's largest medical library", is an incredible resource. I was able to find a lot of great information here.
• Want medical information, specifically from medical journals, delievered to you? J.A.D.E, or Journal Abstracts Delivered Electronically, to the rescue. You can specify exactly what topic you would like to have delivered to you, and how often you'd like to see it.
• If you're researching anything to do with a virus, check the All the Virology on the Web database first.
• An extremely fascinating site is BioEthics Web . Check out the theory of ethics, genetic issues, search by region, etc.
• Canada's Institute for Health Information lets you search by data collections, research reports, quick stats, and more.
• The National Cancer Institute is a great site. Search for information about any type of cancer, clinical trials, cancer topics, etc. In adddition, you can find cancer statistics and all kinds of info about national research into the disease.
• The United States Department of Health and Human Services is a searchable database of anything to do with human health, including safety and wellness, drugs and food, reference, aging, and more.
• From the American Academy of Family Physicians comes FamilyDoctor.org , health information for the entire family. Nicely organized into searchable subject directories as well as alphabetized listings.
• Harvard Medical School has InteliHealth.org , a collection of medical database information as well as journals, papers, and web links.
• Everything you ever wanted to know about the process of aging can probably be found at AARP's Internet Resources on Aging . This site is organized into searchable subject categories.
• Information about substance abuse and mental health can be found at SAMHSA , a site put together by the US Department of Health and Human Services.
• The World Health Organization has an excellent site, WHO Health Topics , organized alphabetically. You can also check out world policies on disease and emergencies.
• OmniMedicalSearch.com is a search engine for many specialized medical databases. You can customize your search to the Web, MedPro Search, Basic Search, or you can choose which specific medical database you'd like to browse; such as HealthFinder.gov, MediWarp, or the National Cancer Institute (among others).
• The Merck Manual of Medical Information : One of the largest medical information sites on the Web today.
• MedicalStudent.com : "a digital library of authoritative medical information for all students of medicine."
• OmniMedicalSearch : a metasearch engine for a variety of medical information sites, including PubMed, the CDC, and the NIH.
• FindArticles Medical Information : find all sorts of journal and database abstracts with FindArticles.

Specialized Medical Information Sites

• FreeBooks4Doctors : "FreeBooks4Doctors was created to promote the free availability of medical books on the Internet."
• Medical Mnemonics : "A free, non-profit, online searchable database of medical mnemonics to help remember the important details."
• Medlogs : a large medical information news aggregator; pulls medical information from a large variety of online journals and sites.
• Medical and Health Sciences Libraries on the Web : a collection of university health and medical libraries on the Web; large collection here of some pretty fantastic medical information databases.
• Medical Images on the Web : From the University of Nebraska; a list of databases and sites that you can use to find medical images.