World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 98 464 414 34 33 318 28086
Genetics 97 845 796 28 28 297 26779

Jan Kok publications per year

The chart shows the history of publications by Jan Kok between 1984 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Jan Kok published across 42 years, from 1984 to 2025, averaging 7.9 papers a year. Output peaked at 20 publications in 2006. 3 of the 331 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1984 to 2025. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 2006. 1984: 2 publications 1985: 5 publications 1986: 0 publications 1987: 3 publications 1988: 7 publications 1989: 10 publications 1990: 6 publications 1991: 16 publications 1992: 13 publications 1993: 10 publications 1994: 4 publications 1995: 18 publications 1996: 14 publications 1997: 8 publications 1998: 12 publications 1999: 5 publications 2000: 13 publications 2001: 2 publications 2002: 10 publications 2003: 12 publications 2004: 10 publications 2005: 17 publications 2006: 20 publications 2007: 10 publications 2008: 5 publications 2009: 3 publications 2010: 9 publications 2011: 15 publications 2012: 9 publications 2013: 8 publications 2014: 5 publications 2015: 2 publications 2016: 6 publications 2017: 9 publications 2018: 7 publications 2019: 8 publications 2020: 8 publications 2021: 4 publications 2022: 3 publications 2023: 0 publications 2024: 0 publications 2025: 3 publications
1984 2025

331 publications in total across all disciplines

View publications per year as a table
Jan Kok: publications per year, 1984 to 2025
Year Publications
1984 2
1985 5
1986 0
1987 3
1988 7
1989 10
1990 6
1991 16
1992 13
1993 10
1994 4
1995 18
1996 14
1997 8
1998 12
1999 5
2000 13
2001 2
2002 10
2003 12
2004 10
2005 17
2006 20
2007 10
2008 5
2009 3
2010 9
2011 15
2012 9
2013 8
2014 5
2015 2
2016 6
2017 9
2018 7
2019 8
2020 8
2021 4
2022 3
2023 0
2024 0
2025 3
Total 331
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Jan Kok publications per year - data summary

  • Jan Kok, a Microbiology scholar from University of Groningen, has 331 publications recorded across 42 years, from 1984 to 2025.
  • The oldest publication on record dates to 1984 and the most recent to 2025.
  • The most productive year is 2006, with 20 publications.
  • The least productive years with any output are 1984, 2001 and 2015, with 2 publications each.
  • 3 of the 42 years in the span carry no publications at all (1986, 2023 and 2024).
  • The rate of publication averages 7.9 papers per year over the whole span, or 8.5 per year counting only the 39 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 10 publications, 3% of the career total.
  • Split into equal eras - 1984-1997: 116 publications (8.3 per year); 1998-2011: 143 publications (10.2 per year); 2012-2025: 72 publications (5.1 per year).
  • Comparing the opening and closing eras, the overall trend of publication is declining.

Jan Kok publication distribution in Microbiology in 2026

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

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 315–324 publications, is where this scientist sits. 55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55–64 publications 679+

This scientist: 318 publications — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234
205–214 208
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146
265–274 139
275–284 148
285–294 115
295–304 96
305–314 88
315–324 106 318
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
Download as CSV

Jan Kok publication distribution in Microbiology in 2026 - data summary

  • The chart plots the publication count of all 5,513 Microbiology scientists ranked by Research.com in 2026, grouped into 64 ranges running from 55–64 to 679+ publications.
  • Jan Kok, a Microbiology scholar from University of Groningen, records 318 publications - the 80th percentile of the discipline.
  • 80% of ranked Microbiology scientists score the same or lower than Jan Kok, and about 20% score higher.
  • The median of the discipline falls in the 195–204 publications range, and Jan Kok ranks above the median.
  • The most crowded range is 135–144 publications, holding 288 scientists (5% of the field).
  • 54% of the field sits in the lowest quarter of the value range (up to 205–214 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 679 publications or more, 99 scientists in all (2% of the field).

Jan Kok D-index placement in Microbiology in 2026

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

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 98 D-Index, is where this scientist sits. 40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 98 D-Index — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151
60 139
61 123
62 126
63 144
64 109
65 103
66 124
67 112
68 103
69 131
70 94
71 93
72 96
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34
92 27
93 26
94 33
95 22
96 37
97 22
98 21 98
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
Download as CSV

Jan Kok D-index placement in Microbiology in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 5,513 Microbiology scientists ranked by Research.com in 2026, grouped into 88 ranges running from 40 to 127+ D-Index.
  • Jan Kok, a Microbiology scholar from University of Groningen, records 98 D-Index - the 92nd percentile of the discipline.
  • 92% of ranked Microbiology scientists score the same or lower than Jan Kok, and about 8% score higher.
  • The median of the discipline falls in the 63 D-Index range, and Jan Kok ranks above the median.
  • The most crowded range is 58 D-Index, holding 162 scientists (3% of the field).
  • 47% of the field sits in the lowest quarter of the value range (up to 61 D-Index), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 127 D-Index or more, 95 scientists in all (2% of the field).

Overview

Jan Kok is affiliated with the University of Groningen in the Netherlands. Their research spans biochemistry, genetics, and molecular biology, with a strong focus on molecular biology as reflected by the majority of their work. They have contributed to research fields including food science, nutrition and dietetics, genetics, and ecology.

The scientist's research covers a variety of topics within microbiology and molecular biology, such as probiotics and fermented foods, genomics and phylogenetic studies, RNA and protein synthesis mechanisms, microbial metabolic engineering and bioproduction, bacteriophages and microbial interactions, CRISPR and genetic engineering, and microbial metabolites in food biotechnology.

Jan Kok has published extensively in scientific journals, with frequent contributions appearing in:

  • Applied and Environmental Microbiology
  • Microbiology Resource Announcements
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Nucleic Acids Research
  • Food Research International

Some of their recent papers include:

  • FUNAGE-Pro: comprehensive web server for gene set enrichment analysis of prokaryotes, 2022, Nucleic Acids Research
  • Human milk oligosaccharides and non-digestible carbohydrates reduce pathogen adhesion to intestinal epithelial cells by decoy effects or by attenuating bacterial virulence, 2021, Food Research International
  • Coenzyme A precursors flow from mother to zygote and from microbiome to host, 2022, Molecular Cell
  • Lysis of a Lactococcus lactis Dipeptidase Mutant and Rescue by Mutation in the Pleiotropic Regulator CodY, 2020, Applied and Environmental Microbiology
  • Another Breaker of the Wall: the Biological Function of the Usp45 Protein of Lactococcus lactis, 2020, Applied and Environmental Microbiology

Jan Kok's list of frequent co-authors includes researchers with whom they have collaborated multiple times, such as:

  • Oscar P. Kuipers
  • Anne de Jong
  • Chenxi Huang
  • Jhonatan A. Hernandez-Valdes
  • Barbara Marcelli

Best Publications

  • The Relationship among Tyrosine Decarboxylase and Agmatine Deiminase Pathways in Enterococcus faecalis

    Marta Perez;Victor Ladero;Beatriz del Rio;Begona Redruello

  • BAGEL4: a user-friendly web server to thoroughly mine RiPPs and bacteriocins

    Auke J van Heel;Anne de Jong;Chunxu Song;Jakob H Viel

  • Stress Physiology of Lactic Acid Bacteria

    Konstantinos Papadimitriou;Ángel Alegría;Peter A Bron;Maria de Angelis

  • LysM, a widely distributed protein motif for binding to (peptido)glycans

    Girbe Buist;Anton Steen;Jan Kok;Oscar P. Kuipers

  • BAGEL3: Automated identification of genes encoding bacteriocins and (non-)bactericidal posttranslationally modified peptides.

    Auke J. van Heel;Anne de Jong;Manuel Montalbán-López;Jan Kok

  • Complete Genome Sequence of the Prototype Lactic Acid Bacterium Lactococcus lactis subsp. cremoris MG1363

    Udo Wegmann;Mary O'Connell-Motherway;Aldert Zomer;Girbe Buist

  • Construction of Plasmid Cloning Vectors for Lactic Streptococci Which Also Replicate in Bacillus subtilis and Escherichia coli

    J. Kok;J. M. B. M. Van Der Vossen;G. Venema

  • A system to generate chromosomal mutations in Lactococcus lactis which allows fast analysis of targeted genes.

    Jean Law;Girbe Buist;Alfred Haandrikman;Jan Kok

  • A general system for generating unlabelled gene replacements in bacterial chromosomes

    K. Leenhouts;Girbe Buist;A. Bolhuis;A. ten Berge

  • Multidrug resistance mediated by a bacterial homolog of the human multidrug transporter MDR1

    Hendrik W. van Veen;Koen Venema;Henk Bolhuis;Irina Oussenko

  • Construction of a Lactococcal Expression Vector: Expression of Hen Egg White Lysozyme in Lactococcus lactis subsp. lactis

    M. Van De Guchte;J. M. B. M. Van Der Vossen;J. Kok;G. Venema

  • Pediocin PA-1, a wide-spectrum bacteriocin from lactic acid bacteria

    Juan M Rodríguez;María I Martínez;Jan Kok

  • Bile salt hydrolase of Bifidobacterium longum : Biochemical and genetic characterization

    Hiroshi Tanaka;Honoo Hashiba;Jan Kok;Igor Mierau

  • A chloride-inducible acid resistance mechanism in Lactococcus lactis and its regulation

    Jan Willem Sanders;Kees Leenhouts;Jan Burghoorn;Jan Roel Brands

  • Molecular cloning and nucleotide sequence of the gene encoding the major peptidoglycan hydrolase of Lactococcus lactis, a muramidase needed for cell separation.

    Girbe Buist;Jan Kok;Kees J. Leenhouts;Magdalena Dabrowska

  • Discovering lactic acid bacteria by genomics

    Todd Klaenhammer;Eric Altermann;Fabrizio Arigoni;Alexander Bolotin

  • BAGEL: a web-based bacteriocin genome mining tool

    Anne de Jong;Sacha A. F. T. van Hijum;Jetta J. E. Bijlsma;Jan Kok

  • Cell Wall Attachment of a Widely Distributed Peptidoglycan Binding Domain Is Hindered by Cell Wall Constituents

    Anton Steen;Girbe Buist;Kees J. Leenhouts;Mohamed El Khattabi

  • Bet-hedging during bacterial diauxic shift

    Ana Solopova;Jordi van Gestel;Franz J. Weissing;Herwig Bachmann

  • The proteolytic system of lactic acid bacteria

    J. Kok;W. M. De Vos

  • AcmA of Lactococcus lactis is an N-acetylglucosaminidase with an optimal number of LysM domains for proper functioning

    Anton Steen;Girbe Buist;Gavin J. Horsburgh;Gerard Venema

  • Construction of a Lactococcal Expression Vector : Expression of Hen Egg White Lysozyme in Lactococcus lactis subsp. lactis

    Maarten van de Guchte;Jos M.B.M. van der Vossen;Jan Kok;Gerard Venema

Frequent Co-Authors

Oscar P. Kuipers
Oscar P. Kuipers University of Groningen
Gerhardus Venema
Gerhardus Venema University of Groningen
Girbe Buist
Girbe Buist University Medical Center Groningen
Sacha A. F. T. van Hijum
Sacha A. F. T. van Hijum KPMG (Netherlands)
Bert Poolman
Bert Poolman University of Groningen
Wil N. Konings
Wil N. Konings University of Groningen
Douwe van Sinderen
Douwe van Sinderen University College Cork
Bas Teusink
Bas Teusink Vrije Universiteit Amsterdam
Sierd Bron
Sierd Bron University of Groningen
Wn Konings
Wn Konings University of Groningen

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