Molecules 2010, 15(6), 4450-4451; doi:10.3390/molecules15064450

Editorial
Continued Growth of the Impact Factors of MDPI Open Access Journals
Dietrich Rordorf
MDPI AG, Postfach, CH-4005 Basel, Switzerland; Office: Kandererstrasse 25, CH-4057 Basel, Switzerland, E-Mail: rordorf@mdpi.com Tel.: +41 61 683 77 35; Fax: +41 61 302 89 18
Received: 18 June 2010 / Published: 21 June 2010

We are pleased to report the continued increase of Impact Factors of MDPI journal in 2009 (see Figure 1 and Table 1).

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Figure 1. Impact Factor Progress 2005-2009

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Figure 1. Impact Factor Progress 2005-2009
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As noted in a similar Editorial published in June 2009, the Impact Factors of MDPI journals havebeen steadily recovering since the inception of the full Open Access publishing policy in early 2007 [1]. We are pleased to see that all journals now have an Impact Factor much higher than 1. In 2011 the Journal Citation Report (JCR) will include the first official Impact Factor of Entropy, and in 2012, the International Journal of Environmental Research and Public Health will be included for the first time. Nevertheless, we are already able to compute a preliminary impact factor of approximately 1.4 for Entropy [2].

Table Table 1. Impact Factors of four MDPI journals (adapted from the Journal Citation Report (JCR), Edition 2009, Copyright 2010 by Thomson Reuters).

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Table 1. Impact Factors of four MDPI journals (adapted from the Journal Citation Report (JCR), Edition 2009, Copyright 2010 by Thomson Reuters).
Journal20052006200720082009
IJMS1.4670.6790.7500.9781.387
Marine Drugsn/an/a1.1031.2002.863
Molecules1.1130.8410.9401.2521.738
Sensors1.2081.3731.5731.8701.821

  1. Lin, S.-K. Full Open Access Journals Have Increased Impact Factors. Molecules 2009, 14, 2254–2255, doi:10.3390/molecules14062254.
  2. MDPI. Preliminary Calculation of the Impact Factors 2009 for SCIE-Covered Journals. Available online: http://www.mdpi.com/about/announcements/63/ (accessed on 10 February 2010).
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