World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
51
Citations
7590
World Ranking
4825
National Ranking
64

Per Axel Clausen publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Per Axel Clausen sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 117 publications — 22nd percentile

22% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Per Axel Clausen D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Per Axel Clausen sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 51 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Per Axel Clausen is affiliated with the National Research Centre for the Working Environment in Denmark. Their research focuses on the intersection of medicine and environmental science, particularly exploring public health, environmental and occupational health, toxicology, and mutagenesis.

The scientist's work covers a range of topics including occupational exposure and asthma, air quality and health impacts, nanoparticles synthesis and applications, contact dermatitis and allergies, inhalation and respiratory drug delivery, vehicle emissions and performance, and occupational health and performance.

They have contributed to scientific literature in several prominent venues such as the International Journal of Hygiene and Environmental Health, NanoImpact, Particle and Fibre Toxicology, Nanotoxicology, and Nanomaterials.

Frequent collaborators include Ulla Vogel, Marie Frederiksen, Vivi Schlünssen, Anne Thoustrup Saber, and Karin Sørig Hougaard.

Some of the recent papers by Per Axel Clausen include:

  • Chemicals inhaled from spray cleaning and disinfection products and their respiratory effects. A comprehensive review, 2020, International Journal of Hygiene and Environmental Health

Other publications in the dataset credit different authors but are relevant within the same research ecosystems:

  • Particle characterization and toxicity in C57BL/6 mice following instillation of five different diesel exhaust particles designed to differ in physicochemical properties, 2020, Particle and Fibre Toxicology
  • Organomodified nanoclays induce less inflammation, acute phase response, and genotoxicity than pristine nanoclays in mice lungs, 2020, Nanotoxicology
  • Single-Walled vs. Multi-Walled Carbon Nanotubes: Influence of Physico-Chemical Properties on Toxicogenomics Responses in Mouse Lungs, 2023, Nanomaterials
  • Asthma-inducing potential of 28 substances in spray cleaning products-Assessed by quantitative structure activity relationship (QSAR) testing and literature review, 2021, Journal of Applied Toxicology

Their research spans major fields of study such as Medicine and Environmental Science, with subfields focusing on Public Health, Environmental and Occupational Health, Health, Toxicology and Mutagenesis, Materials Chemistry, Pulmonary and Respiratory Medicine, and Dermatology.

Best Publications

  • Organic compounds in office environments - sensory irritation, odor, measurements and the role of reactive chemistry.

    P. Wolkoff;C. K. Wilkins;P. A. Clausen;G. D. Nielsen

  • Formation of Strong Airway Irritants in Terpene/Ozone Mixtures

    P. Wolkoff;P. A. Clausen;C. K. Wilkins;G. D. Nielsen

  • Emission of di-2-ethylhexyl phthalate from PVC flooring into air and uptake in dust: emission and sorption experiments in FLEC and CLIMPAQ.

    Per Axel Clausen;Vivi Hansen;Lars Gunnarsen;and Alireza Afshari

  • Emission of phthalates from PVC and other materials

    Alireza Afshari;Lars Gunnarsen;P.A. Clausen;V. Hansen

  • Predicting Residential Exposure to Phthalate Plasticizer Emitted from Vinyl Flooring: A Mechanistic Analysis

    Ying Xu;Elaine A Cohen Hubal;Per A Clausen;John C Little

  • Are We Measuring the Relevant Indoor Pollutants

    P. Wolkoff;P. A. Clausen;B. Jensen;G. D. Nielsen

  • Influence of Temperature on the Emission of Di-(2-ethylhexyl)phthalate (DEHP) from PVC Flooring in the Emission Cell FLEC

    Per Axel Clausen;Zhe Liu;Vivi Kofoed-Sørensen;John Little

  • Multi-walled carbon nanotube physicochemical properties predict pulmonary inflammation and genotoxicity

    Sarah S. Poulsen;Petra Jackson;Kirsten Kling;Kristina B. Knudsen

  • Measuring and predicting the emission rate of phthalate plasticizer from vinyl flooring in a specially-designed chamber.

    Ying Xu;Zhe Liu;Jinsoo Park;Per A. Clausen

  • Chemical and biological evaluation of a reaction mixture of R-(+)-limonene/ozone: formation of strong airway irritants.

    Per Axel Clausen;Cornelius Ken Wilkins;Peder Wolkoff;Gunnar Damgård Nielsen

  • Genotoxicity of polyvinylpyrrolidone-coated silver nanoparticles in BEAS 2B cells

    Penny Nymark;Julia Catalán;Julia Catalán;Satu Suhonen;Hilkka Järventaus

  • Airway inflammation and adjuvant effect after repeated airborne exposures to di-(2-ethylhexyl)phthalate and ovalbumin in BALB/c mice.

    Søren Thor Larsen;Jitka Stilund Hansen;Erik Wind Hansen;Per Axel Clausen

  • Upper airway and pulmonary effects of oxidation products of (+)-alpha-pinene, d-limonene, and isoprene in BALB/c mice.

    Annette C. Rohr;Cornelius K. Wilkins;Per A. Clausen;Maria Hammer

  • Characterization of genotoxic response to 15 multiwalled carbon nanotubes with variable physicochemical properties including surface functionalizations in the FE1-Muta(TM) mouse lung epithelial cell line.

    Petra Jackson;Kirsten Kling;Keld Alstrup Jensen;Per Axel Clausen

  • Degradation products of Tenax TA formed during sampling and thermal desorption analysis: Indicators of reactive species indoors

    Per Axel Clausen;Peder Wolkoff

  • Simultaneous extraction of di(2-ethylhexyl) phthalate and nonionic surfactants from house dust. Concentrations in floor dust from 15 Danish schools.

    Per Axel Clausen;Rikke L Lindeberg Bille;Rikke L Lindeberg Bille;Tobias Nilsson;Vivi Hansen

  • Formation of strong airway irritants in a model mixture of (+)-α-pinene/ozone

    Peder Wolkoff;Per A. Clausen;Cornelius K. Wilkins;Karin S. Hougaard

  • 'EUROPART'. Airborne particles in the indoor environment. A European interdisciplinary review of scientific evidence on associations between exposure to particles in buildings and health effects.

    T Schneider;J Sundell;W Bischof;Mats Bohgard

  • Formation of strong airway irritants in mixtures of isoprene/ozone and isoprene/ozone/nitrogen dioxide.

    Cornelius K. Wilkins;Per A. Clausen;Peder Wolkoff;S. Thor Larsen

  • Chemicals inhaled from spray cleaning and disinfection products and their respiratory effects. A comprehensive review.

    Per A. Clausen;Marie Frederiksen;Camilla S. Sejbæk;Jorid B. Sørli

  • The Danish Twin Apartment Study; Part I: Formaldehyde and Long‐Term VOC Measurements

    P. Wolkoff;P.A. Clausen;P.A. Nielsen;L. Mølhave

  • Determination of ozone removal rates by selected building products using the FLEC emission cell.

    Jacob G. Klenø;Per A. Clausen;Charles J. Weschler;Peder Wolkoff

  • No cytotoxicity or genotoxicity of graphene and graphene oxide in murine lung epithelial FE1 cells in vitro.

    Stefan Bengtson;Kirsten Kling;Anne Mette Madsen;Asger W. Noergaard

  • Human reference values for acute airway effects of five common ozone-initiated terpene reaction products in indoor air.

    Peder Wolkoff;Søren T. Larsen;Maria Hammer;Vivi Kofoed-Sørensen

Frequent Co-Authors

Peder Wolkoff
Peder Wolkoff National Research Centre for the Working Environment
Ulla Vogel
Ulla Vogel Technical University of Denmark
John C. Little
John C. Little Virginia Tech
Peter Møller
Peter Møller University of Copenhagen
Håkan Wallin
Håkan Wallin National Institute of Occupational Health
Steffen Loft
Steffen Loft University of Copenhagen
Jan Sundell
Jan Sundell Tianjin University
Åse Marie Hansen
Åse Marie Hansen University of Copenhagen
Joakim Pagels
Joakim Pagels Lund University
Angel Lopez-Soler
Angel Lopez-Soler Spanish National Research Council

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