World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
55
Citations
8600
World Ranking
15267
National Ranking
78

Svein Valla publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Svein Valla sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 137 publications — 20th percentile

20% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Svein Valla D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Svein Valla sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 55 D-Index — 25th percentile

25% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Svein Valla was affiliated with the Norwegian University of Science and Technology in Norway. Their research contributions spanned the fields of biochemistry, genetics, molecular biology, and energy, with particular focus on biotechnology, molecular biology, and renewable energy, sustainability, and the environment.

Their work addressed key topics including enzyme production and characterization, enzyme catalysis and immobilization, and algal biology and biofuel production.

Among the documented publications, one notable paper was titled Identification of Regulatory Genes and Metabolic Processes Important for Alginate Biosynthesis in Azotobacter vinelandii by Screening of a Transposon Insertion Mutant Library, published in 2020 in the journal Frontiers in Bioengineering and Biotechnology.

Svein Valla collaborated with several frequent co-authors, including:

  • Mali Mærk
  • Øyvind Jakobsen
  • Håvard Sletta
  • Geir Klinkenberg
  • Anne Tøndervik

In terms of publication venues, their work appeared in:

  • Frontiers in Bioengineering and Biotechnology

Best Publications

  • Bacterial alginates: Biosynthesis and applications

    B. H. A. Rehm;S. Valla

  • Genome Sequence of Azotobacter vinelandii, an Obligate Aerobe Specialized To Support Diverse Anaerobic Metabolic Processes

    João C. Setubal;Patricia dos Santos;Barry S. Goldman;Helga Ertesvåg

  • Biosynthesis of the polyene antifungal antibiotic nystatin in Streptomyces noursei ATCC 11455: analysis of the gene cluster and deduction of the biosynthetic pathway

    Trygve Brautaset;Olga N Sekurova;Håvard Sletta;Trond E Ellingsen

  • Construction and use of a versatile set of broad-host-range cloning and expression vectors based on the RK2 replicon.

    J M Blatny;T Brautaset;H C Winther-Larsen;K Haugan

  • Biosynthesis and applications of alginates

    Helga Ertesvåg;Svein Valla

  • A new gene required for cellulose production and a gene encoding cellulolytic activity in Acetobacter xylinum are colocalized with the bcs operon.

    R. Standal;Tore Geir Iversen;D. H. Coucheron;E. Fjaervik

  • IMPROVED BROAD-HOST-RANGE RK2 VECTORS USEFUL FOR HIGH AND LOW REGULATED GENE EXPRESSION LEVELS IN GRAM-NEGATIVE BACTERIA

    Janet Martha Blatny;Trygve Brautaset;Hanne C. Winther-Larsen;Ponniah Karunakaran

  • A FAMILY OF MODULAR TYPE MANNURONAN C-5-EPIMERASE GENES CONTROLS ALGINATE STRUCTURE IN AZOTOBACTER VINELANDII

    Helga Ertesvåg;Hilde Kristin Høidal;Ingrid Kathrin Hals;Anne Rian

  • The Pseudomonas fluorescens AlgG Protein, but Not Its Mannuronan C-5-Epimerase Activity, Is Needed for Alginate Polymer Formation

    Martin Gimmestad;Håvard Sletta;Helga Ertesvåg;Karianne Bakkevig

  • Cloning and expression of an Azotobacter vinelandii mannuronan C-5-epimerase gene.

    H Ertesvåg;B Doseth;B Larsen;G Skjåk-Braek

  • In Vivo Analysis of the Regulatory Genes in the Nystatin Biosynthetic Gene Cluster of Streptomyces noursei ATCC 11455 Reveals Their Differential Control Over Antibiotic Biosynthesis

    Olga N. Sekurova;Trygve Brautaset;Håvard Sletta;Sven E. F. Borgos

  • The Presence of N-Terminal Secretion Signal Sequences Leads to Strong Stimulation of the Total Expression Levels of Three Tested Medically Important Proteins during High-Cell-Density Cultivations of Escherichia coli

    H. Sletta;A. Tøndervik;S. Hakvåg;T. E. Vee Aune

  • Rk2-based broad-host-range cloning vector useful for transfer of metagenomic libraries to a variety of bacterial species

    Trine Aakvik;Kristin Floegstad Degnes;Trond Erling Ellingsen;Rannveig Skrede

  • Cloning and expression of three new Aazotobacter vinelandii genes closely related to a previously described gene family encoding mannuronan C-5-epimerases.

    Britt Iren Glærum Svanem;Gudmund Skjåk-Bræk;Helga Ertesvåg;Svein Valla

  • A comparative analysis of the properties of regulated promoter systems commonly used for recombinant gene expression in Escherichia coli

    Simone Balzer;Veronika Kucharova;Judith A. Megerle;Rahmi Lale

  • Upregulated transcription of plasmid and chromosomal ribulose monophosphate pathway genes is critical for methanol assimilation rate and methanol tolerance in the methylotrophic bacterium Bacillus methanolicus.

    Øyvind M. Jakobsen;Øyvind M. Jakobsen;Aline Benichou;Michael C. Flickinger;Svein Valla

  • New broad-host-range promoter probe vectors based on the plasmid RK2 replicon

    Pedro Miguel Santos;Ilaria Di Bartolo;Janet Martha Blatny;Elisabetta Zennaro

  • Ionic and acid gel formation of epimerised alginates; the effect of AlgE4.

    Kurt I. Draget;Berit Strand;Martin Hartmann;Svein Valla

  • Cellulose-negative Mutants of Acetobacter xylinum

    Svein Valla;Johs. Kjosbakken

  • Metagenomics of microbial life in extreme temperature environments.

    Anna Lewin;Alexander Wentzel;Svein Valla

Frequent Co-Authors

Gudmund Skjåk-Bræk
Gudmund Skjåk-Bræk Norwegian University of Science and Technology
Dennis E. Ohman
Dennis E. Ohman Virginia Commonwealth University Medical Center
Bernd H. A. Rehm
Bernd H. A. Rehm Griffith University
Royston Goodacre
Royston Goodacre University of Liverpool
Mark R. Liles
Mark R. Liles Auburn University
Don A. Cowan
Don A. Cowan University of Pretoria
Angela Sessitsch
Angela Sessitsch Austrian Institute of Technology
João C. Setubal
João C. Setubal Universidade de São Paulo
David J. Studholme
David J. Studholme University of Exeter
Kjetill S. Jakobsen
Kjetill S. Jakobsen University of Oslo

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