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Editorial

Steady Impact Factor Growth for MDPI Open Access Journals

by
Alexander Thiesen
MDPI AG, Postfach, CH – 4005 Basel, Switzerland
Molecules 2012, 17(9), 10971-10973; https://doi.org/10.3390/molecules170910971
Submission received: 5 September 2012 / Accepted: 5 September 2012 / Published: 12 September 2012
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For the past three years MDPI has announced the newly released impact factors for its Open Access journals by the means of an annual editorial [1,2,3]. In 2012 we are—once again—pleased to report that the growth of the impact factors of MDPI’s Open Access journals continues. This year’s edition of the Journal Citation Reports (JCR), which is published annually by Thomson Reuters, includes 10 journals published by MDPI, including three that have received their first official Impact Factors—International Journal of Environmental Research and Public Health (IJERPH), Materials and Nutrients. Table 1 reports the latest Impact Factors for 2011. Figure 1 graphically depicts the evolution of the Impact Factors for four MDPI open access journals that have received Impact Factors in the past. Table 2 reports the ranking of the MDPI journals within the subject categories of the Science Citation Index Expanded (SCIE).
Table
Table 1. Impact Factors of ten MDPI journals (adapted from the Journal Citation Reports (JCR), Edition 2011, Copyright 2012 by Thomson Reuters).
Table 1. Impact Factors of ten MDPI journals (adapted from the Journal Citation Reports (JCR), Edition 2011, Copyright 2012 by Thomson Reuters).
20072008200920102011
Energies 1.1301.865
Entropy 1.1091.183
IJERPH 1.605
IJMS0.7500.9781.3872.2792.598
Marine Drugs1.1031.2002.8633.4713.854
Materials 1.677
Molecules0.9401.2521.7381.9882.386
Nutrients 0.676
Sensors1.5731.8701.8211.7711.739
Viruses 1.0001.500
Molecules 17 10971 g001 550
Figure 1. Evolution of the Impact Factors for four MDPI open access journals (adapted from the Journal Citation Reports (JCR), Edition 2011, Copyright 2012 by Thomson Reuters).
Figure 1. Evolution of the Impact Factors for four MDPI open access journals (adapted from the Journal Citation Reports (JCR), Edition 2011, Copyright 2012 by Thomson Reuters).
Molecules 17 10971 g001
Table
Table 2. Rankings of MDPI open access journals by subject categories (adapted from the Journal Citation Reports (JCR), Edition 2011, Copyright 2012 by Thomson Reuters).
Table 2. Rankings of MDPI open access journals by subject categories (adapted from the Journal Citation Reports (JCR), Edition 2011, Copyright 2012 by Thomson Reuters).
JournalRankCategory
Energies35/80Energy & Fuels
Entropy36/83Physics, Multidisciplinary
IJERPH103/204Environmental Sciences
IJMS44/150Chemistry, Multidisciplinary
Marine Drugs7/58Chemistry, Medicinal
Materials85/230Materials Science, Multidisciplinary
Molecules26/56Chemistry, Organic
Nutrients64/72Nutrition & Dietetics
Sensors14/58Instruments & Instrumentation
18/27Electrochemistry
41/37Chemistry, Analytical
Viruses28/32Virology
The continued growth of the Impact Factors of MDPI journals provides further evidence for the citation advantage of the full Open Access publishing policy—which was instituted for all MDPI journals in early 2007 [4]—over the non-Open Access publishing policy [5].

References

  1. Lin, S.-K. Full Open Access Journals Have Increased Impact Factors. Molecules 2009, 14, 2254–2255. [Google Scholar] [CrossRef]
  2. Rordorf, D. Continued Growth of the Impact Factors of MDPI Open Access Journals. Molecules 2010, 15, 4450–4451. [Google Scholar] [CrossRef]
  3. Rordorf, D. Sustained Growth of the Impact Factors of MDPI Open Access Journals. Molecules 2012, 17, 1354–1356. [Google Scholar] [CrossRef]
  4. Lin, S.-K. Full Open Access Publishing Policy Imposed in 2007: Molecules Publishes Many More Papers This Year — More than 2000 Pages Published up to Issue 8. Molecules 2007, 12, 2001–2002. [Google Scholar] [CrossRef]
  5. Lin, S.-K. Non-Open Access and Its Adverse Impact on Molecules. Molecules 2007, 12, 1436–1437. [Google Scholar] [CrossRef]

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MDPI and ACS Style

Thiesen, A. Steady Impact Factor Growth for MDPI Open Access Journals. Molecules 2012, 17, 10971-10973. https://doi.org/10.3390/molecules170910971

AMA Style

Thiesen A. Steady Impact Factor Growth for MDPI Open Access Journals. Molecules. 2012; 17(9):10971-10973. https://doi.org/10.3390/molecules170910971

Chicago/Turabian Style

Thiesen, Alexander. 2012. "Steady Impact Factor Growth for MDPI Open Access Journals" Molecules 17, no. 9: 10971-10973. https://doi.org/10.3390/molecules170910971

APA Style

Thiesen, A. (2012). Steady Impact Factor Growth for MDPI Open Access Journals. Molecules, 17(9), 10971-10973. https://doi.org/10.3390/molecules170910971

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