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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 52 13363 12026 3499 2861 190 16396

Jan Kern publications per year

The chart shows the history of publications by Jan Kern between 2001 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Jan Kern published across 26 years, from 2001 to 2026, averaging 9.2 papers a year. Output peaked at 24 publications in 2021. 17 of the 238 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 2001 to 2026. Vertical axis: number of publications, 0 to 24. Peak 24 publications in 2021. 2001: 5 publications 2002: 1 publication 2003: 2 publications 2004: 4 publications 2005: 11 publications 2006: 3 publications 2007: 7 publications 2008: 6 publications 2009: 6 publications 2010: 7 publications 2011: 5 publications 2012: 7 publications 2013: 9 publications 2014: 16 publications 2015: 10 publications 2016: 11 publications 2017: 18 publications 2018: 18 publications 2019: 7 publications 2020: 10 publications 2021: 24 publications 2022: 9 publications 2023: 15 publications 2024: 10 publications 2025: 16 publications 2026: 1 publication
2001 2026

238 publications in total across all disciplines

View publications per year as a table
Jan Kern: publications per year, 2001 to 2026
Year Publications
2001 5
2002 1
2003 2
2004 4
2005 11
2006 3
2007 7
2008 6
2009 6
2010 7
2011 5
2012 7
2013 9
2014 16
2015 10
2016 11
2017 18
2018 18
2019 7
2020 10
2021 24
2022 9
2023 15
2024 10
2025 16
2026 1
Total 238
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Jan Kern publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Jan Kern sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 181–200 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 190 publications — 29th percentile

29% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344 190
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Jan Kern D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Jan Kern sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 52–53 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 52 D-Index — 26th percentile

26% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872 52
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Jan Kern is affiliated with the Lawrence Berkeley National Laboratory in the United States. Their primary research spans the fields of Biochemistry, Genetics and Molecular Biology, as well as Physics and Astronomy. Within these areas, their work focuses on subfields such as Molecular Biology, Materials Chemistry, Atomic and Molecular Physics and Optics, Radiation, and Structural Biology.

The scientist has contributed extensively to several research topics, including:

  • Photosynthetic Processes and Mechanisms
  • Enzyme Structure and Function
  • Spectroscopy and Quantum Chemical Studies
  • Advanced Electron Microscopy Techniques and Applications
  • Photoreceptor and Optogenetics Research
  • Advanced X-ray Imaging Techniques
  • X-ray Spectroscopy and Fluorescence Analysis

Among Jan Kern's recent publications are the following:

  • Untangling the sequence of events during the S 2 → S 3 transition in photosystem II and implications for the water oxidation mechanism, 2020, Proceedings of the National Academy of Sciences
  • Solar energy conversion by photosystem II: principles and structures, 2023, Photosynthesis Research
  • Structural evidence for intermediates during O2 formation in photosystem II, 2023, Nature
  • Structural dynamics in the water and proton channels of photosystem II during the S2 to S3 transition, 2021, Nature Communications
  • Using X-ray free-electron lasers for spectroscopy of molecular catalysts and metalloenzymes, 2021, Nature Reviews Physics

Kern frequently collaborates with a core group of coauthors. These include Junko Yano, Vittal K. Yachandra, Nicholas K. Sauter, Asmit Bhowmick, and Franklin D. Fuller.

The scientist's work has appeared predominantly in notable publication venues, including:

  • Structural Dynamics
  • Photosynthesis Research
  • Journal of the American Chemical Society
  • Proceedings of the National Academy of Sciences
  • Nature

Best Publications

  • Crystal structure of photosystem II from Synechococcus elongatus at 3.8 A resolution.

    Athina Zouni;Horst Tobias Witt;Jan Kern;Petra Fromme

  • Towards complete cofactor arrangement in the 3.0 Å resolution structure of photosystem II

    Bernhard Loll;Jana Kern;Wolfram Saenger;Athina Zouni

  • Cyanobacterial photosystem II at 2.9-Å resolution and the role of quinones, lipids, channels and chloride

    Albert Guskov;Jan Kern;Jan Kern;Azat Gabdulkhakov;Matthias Broser

  • Where water is oxidized to dioxygen: structure of the photosynthetic Mn4Ca cluster.

    Junko Yano;Jan Kern;Kenneth Sauer;Kenneth Sauer;Matthew J. Latimer

  • X-ray damage to the Mn4Ca complex in single crystals of photosystem II: A case study for metalloprotein crystallography

    Junko Yano;Jana Kern;Klaus−Dieter Irrgang;Matthew J. Latimer

  • Structures of the intermediates of Kok's photosynthetic water oxidation clock.

    Jan Kern;Ruchira Chatterjee;Iris D. Young;Franklin D. Fuller

  • Simultaneous Femtosecond X-ray Spectroscopy and Diffraction of Photosystem II at Room Temperature

    Jan Kern;Jan Kern;Roberto Alonso-Mori;Rosalie Tran;Johan Hattne

  • Structure of photosystem II and substrate binding at room temperature

    Iris D. Young;Mohamed Ibrahim;Ruchira Chatterjee;Sheraz Gul

  • Crystal Structure of Cyanobacterial Photosystem II at 3.2 A Resolution: A Closer Look at the Mn- Cluster

    Jacek Biesiadka;Bernhard Loll;Jan Kern;Klaus-Dieter Irrgang

  • Taking snapshots of photosynthetic water oxidation using femtosecond X-ray diffraction and spectroscopy

    Jan Kern;Rosalie Tran;Roberto Alonso-Mori;Sergey Koroidov

  • Nanoflow electrospinning serial femtosecond crystallography

    Raymond G Sierra;Hartawan Laksmono;Jan Kern;Rosalie Tran

  • Untangling the sequence of events during the S2 → S3 transition in photosystem II and implications for the water oxidation mechanism

    Mohamed Ibrahim;Thomas Fransson;Ruchira Chatterjee;Mun Hon Cheah

  • Drop-on-demand sample delivery for studying biocatalysts in action at X-ray free-electron lasers

    Franklin D Fuller;Sheraz Gul;Ruchira Chatterjee;E Sethe Burgie

  • Photosystem II: Structure and mechanism of the water:plastoquinone oxidoreductase

    Jan Kern;Gernot Renger

  • Purification, characterisation and crystallisation of photosystem II from Thermosynechococcus elongatus cultivated in a new type of photobioreactor

    J. Kern;B. Loll;C. Lüneberg;D. DiFiore

  • Room temperature femtosecond X-ray diffraction of photosystem II microcrystals

    Jan Kern;Roberto Alonso-Mori;Julia Hellmich;Rosalie Tran

  • Solar energy conversion by photosystem II: principles and structures

    Unknown

  • Accurate macromolecular structures using minimal measurements from X-ray free-electron lasers

    Johan Hattne;Nathaniel Echols;Rosalie Tran;Jan Kern

  • Structural evidence for intermediates during O2 formation in photosystem II

    Unknown

  • Structural Changes of the Oxygen-evolving Complex in Photosystem II during the Catalytic Cycle

    Carina Glöckner;Jan Kern;Matthias Broser;Athina Zouni

  • A multi-crystal wavelength dispersive x-ray spectrometer.

    Roberto Alonso-Mori;Jan Kern;Dimosthenis Sokaras;Tsu-Chien Weng

  • Lipids in photosystem II: interactions with protein and cofactors.

    Bernhard Loll;Jana Kern;Wolfram Saenger;Athina Zouni

Frequent Co-Authors

Junko Yano
Junko Yano Lawrence Berkeley National Laboratory
Vittal K. Yachandra
Vittal K. Yachandra Lawrence Berkeley National Laboratory
Athina Zouni
Athina Zouni Humboldt-Universität zu Berlin
Uwe Bergmann
Uwe Bergmann SLAC National Accelerator Laboratory
Johannes Messinger
Johannes Messinger Umeå University
Dimosthenis Sokaras
Dimosthenis Sokaras SLAC National Accelerator Laboratory
Paul D. Adams
Paul D. Adams Lawrence Berkeley National Laboratory
Wolfram Saenger
Wolfram Saenger Freie Universität Berlin
Holger Dobbek
Holger Dobbek Humboldt-Universität zu Berlin
Pieter Glatzel
Pieter Glatzel European Synchrotron Radiation Facility

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