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Proceedings of the National Academy of Sciences  
Abbreviated title(s) Proc. Natl. Acad. Sci. USA, PNAS
Discipline All sciences
Language English
Edited by Randy Schekman
Publication details
Publisher National Academy of Sciences (United States)
Publication history 1914–present
Open access Delayed
Impact factor 9.38 (2008)
ISSN 0027-8424 (print)
1091-6490 (web)
LCCN 00-227001
OCLC 43473694

The Proceedings of the National Academy of Sciences of the United States of America, usually referred to as PNAS, is the official journal of the United States National Academy of Sciences. PNAS is an important scientific journal that printed its first issue in 1915 and continues to publish highly cited research reports, commentaries, reviews, perspectives, feature articles, profiles, letters to the editor, and actions of the Academy. Coverage in PNAS broadly spans the biological, physical, and social sciences. Although most of the papers published in the journal are in the biomedical sciences, PNAS recruits papers and publishes special features in the physical and social sciences and in mathematics. PNAS (abbreviated Proc Natl Acad Sci U S A for referencing and indexing purposes[1][2]) is published weekly in print, and daily online in PNAS Early Edition CODEN: PNASC8.



PNAS was established by the National Academy of Sciences (NAS) in 1914, with its first issue published in 1915. The NAS itself had been founded in 1863, a private institution, but chartered by the U.S. Congress, with the goal to "investigate, examine, experiment, and report upon any subject of science or art." By 1914, the Academy was well established.

Prior to the start of the journal, NAS published three volumes of organizational transactions, consisting mostly of minutes of meetings and annual reports. In accordance with the guiding principles established by Astronomer George Ellery Hale, the foreign secretary of NAS in 1914, PNAS publishes brief first announcements of Academy members' and foreign associates' more important contributions to research and of work that appears to a member to be of particular importance.[3]


The first managing editor of the journal was mathematician Edwin Bidwell Wilson.

Peer review

All research papers published in PNAS are peer-reviewed.[4] The standard mode is for papers to be submitted directly to PNAS rather than going through an Academy member. Members may handle the peer review process for up to 4 of their own papers per year--this is an open review process because the member selects and communicates directly with the referees. These submissions and reviews, like all for PNAS, are evaluated for publication by the PNAS Editorial Board. Members may also communicate up to 2 papers from non-members to PNAS each year. This is an anonymous review process in that the identities of the referees are not revealed to the authors. Referees are selected by the NAS member.[5][6][7] However, starting from July 1, 2010, PNAS will eliminate communicated submissions through NAS members, while they continue to make the final decision on all PNAS papers.[8]

Dual use papers and national security

In 2003, PNAS issued an editorial stating its policy on publication of sensitive material in the life sciences.[9] PNAS stated that it would "continue to monitor submitted papers for material that may be deemed inappropriate and that could, if published, compromise the public welfare." This statement was in keeping with the efforts of several other journals. [10][11][12] In 2005 PNAS published an article titled "Analyzing a bioterror attack on the food supply: The case of botulinum toxin in milk"[13] despite objections raised by the U.S. Department of Health and Human Services.[14] The paper was published with a commentary by the president of the Academy at the time, Bruce Alberts, titled "Modeling attacks on the food supply".[15]


PNAS is widely read by researchers, particularly those involved in basic sciences, around the world. PNAS Online receives 11.6 million hits per month.[16] The journal is notable for its policy of making research articles freely available online to everyone 6 months after publication (delayed open access), or immediately if authors have chosen the "open access" option (hybrid open access). Immediately free online access (without the 6-month delay) is provided for more than 140 developing countries and for some categories of papers such as colloquia. Abstracts, tables of contents, and online supporting information are free. Anyone can sign up to receive free tables of contents by email.[17]

Because PNAS is self-sustaining and receives no direct funding from the government or the National Academy of Sciences, the journal charges authors publication fees and subscription fees to offset the cost of the editorial and publication process.

The journal's impact factor for 2003 was 14.49, for 2004 was 10.452, for 2005 was 10.231, and 2006 was 9.643 (as measured by Thomson ISI). PNAS is the second most cited scientific journal with 1,338,191 citations from 1994–2004 (the Journal of Biological Chemistry is the most cited journal over this period with 1,740,902 citations in total).

PNAS has received occasional criticism for its practice (sometimes known as news embargo[18]) of releasing papers to science journalists as much as a week before making them available to the general public—according to critics, this allows mainstream news outlets to misrepresent or exaggerate the implications of experimental findings before the scientific community is able to respond.[19][20] Science writer Ed Yong, on the other hand, has claimed that the real problem is not embargoes themselves, but the press releases issued by research institutes and universities.[18]


  1. ^ "List of journals". PubMed. Retrieved 2007-09-29.  
  2. ^ "CAplus Core Journal Coverage List". American Chemical Society. Retrieved 2007-09-29.  
  3. ^
  4. ^
  5. ^ "Information for authors from the PNAS website". PNAS website.  
  6. ^ Alan Fersht (May 3, 2005). "Editorial: How and why to publish in PNAS". PNAS 102 (18): pp.6241–6242. doi:10.1073/pnas.0502713102. PMID 16576766.  
  7. ^ Eugene Garfield (September 7, 1987). "Classic Papers from the Proceedings of the National Academy of Sciences" (PDF). Essays of an Information Scientist 10 (36): 247. Retrieved 2007-09-28.  
  8. ^ Schekman, Randy (2009). "PNAS will eliminate Communicated submissions in July 2010". Proceedings of the National Academy of Sciences 106 (37): 15518.  
  9. ^
  10. ^ Harmon, Amy (February 16, 2003). "Journal Editors to Consider U.S. Security in Publishing". New York Times.  
  11. ^ Fauber, John (February 16, 2003). "Science articles to be censored in terror fight". Milwaukee Journal Sentinel.  .
  12. ^ Cozzarelli, Nicholas R. (February 18, 2003). "PNAS policy on publication of sensitive material in the life sciences". PNAS 100 (4): 1463. doi:10.1073/pnas.0630514100. PMID 12590130.  
  13. ^
  14. ^ "Provocative report on bioterror online". The Atlanta Journal-Constitution. June 29, 2005.  
  15. ^
  16. ^
  17. ^ "PNAS electronic table of contents". PNAS website for signup and setting management.  
  18. ^ a b Yong, Ed (2009-07-16). "Does science journalism falter or flourish under embargo?". Science Blogs. Retrieved 2009-07-04.  
  19. ^ Liberman, Mark (22 April 2009). "Debasing the coinage of rational inquiry: a case study". Language Log. Retrieved 22 April 2009.  
  20. ^ Timmer, John (2009-04-16). "Social media threats hyped by science reporting, not science". Ars Technica. Retrieved 2009-04-20.  

External links



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