World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
59
Citations
12053
World Ranking
3108
National Ranking
1209

Ralph J. Delfino 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 Ralph J. Delfino 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.

Ralph J. Delfino 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 Ralph J. Delfino 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: 59 D-Index — 69th percentile

69% of scientists in this discipline score the same or lower.

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

Overview

Ralph J. Delfino is affiliated with the University of California, Irvine in the United States. Their research is primarily situated within the field of Medicine, with focused contributions in Genetics, Pathology and Forensic Medicine, and Pharmacy as subfields of study.

Their recent publications show engagement with a range of medical and neurological topics. Notable papers include Dexamethasone-cyclophosphamide pulse therapy outcomes comparing pemphigus vulgaris and pemphigus foliaceus groups in a Brazilian cohort study (2023), published in Anais Brasileiros de Dermatologia, and A Pilot Study of Survival in Glioblastomas: Proliferative Index Ki-67, Risk Factors and Implications (2023), featured in Techniques in Neurosurgery & Neurology.

The scientist's research frequently addresses specific topics such as autoimmune bullous skin diseases, coagulation and related biochemical processes including bradykinin and polyphosphates, oral and gingival health research, as well as glioma diagnosis and treatment.

  • Autoimmune Bullous Skin Diseases
  • Coagulation, Bradykinin, Polyphosphates, and Angioedema
  • Oral and Gingival Health Research
  • Glioma Diagnosis and Treatment

They have published in the following venues:

  • Anais Brasileiros de Dermatologia
  • Techniques in Neurosurgery & Neurology

Frequent collaborators in their work include:

  • Ludmilla Figueiredo Vale Fontenelle
  • Roberto Bueno Filho
  • Sebastián Vernal
  • Giovanna Stefanne Lópes Barbosa
  • Eduardo Antônio Donadi

Best Publications

  • Potential role of ultrafine particles in associations between airborne particle mass and cardiovascular health.

    Ralph J. Delfino;Constantinos Sioutas;Shaista Malik

  • Exposure assessment for atmospheric ultrafine particles (UFPs) and implications in epidemiologic research

    Constantinos Sioutas;Ralph J. Delfino;Manisha Singh

  • The relationship of respiratory and cardiovascular hospital admissions to the southern California wildfires of 2003.

    Ralph J Delfino;Sean Brummel;Jun Wu;Hal Stern

  • Epidemiologic evidence for asthma and exposure to air toxics: linkages between occupational, indoor, and community air pollution research.

    Ralph J Delfino

  • Circulating biomarkers of inflammation, antioxidant activity, and platelet activation are associated with primary combustion aerosols in subjects with coronary artery disease.

    Ralph J Delfino;Norbert Staimer;Thomas Tjoa;Andrea Polidori

  • Air Pollution Exposures and Circulating Biomarkers of Effect in a Susceptible Population: Clues to Potential Causal Component Mixtures and Mechanisms

    Ralph J. Delfino;Norbert Staimer;Thomas Tjoa;Daniel L. Gillen

  • Association between local traffic-generated air pollution and preeclampsia and preterm delivery in the south coast air basin of California.

    Jun Wu;Cizao Ren;Ralph J. Delfino;Judith Chung

  • Personal and Ambient Air Pollution is Associated with Increased Exhaled Nitric Oxide in Children with Asthma

    Ralph J. Delfino;Norbert Staimer;Dan Gillen;Thomas Tjoa

  • Asthma symptoms in Hispanic children and daily ambient exposures to toxic and criteria air pollutants.

    Ralph J Delfino;Henry Gong;William S Linn;Edo D Pellizzari

  • Association of FEV1 in asthmatic children with personal and microenvironmental exposure to airborne particulate matter

    Ralph J Delfino;Penelope J E Quintana;Josh Floro;Victor M Gastañaga

  • Daily asthma severity in relation to personal ozone exposure and outdoor fungal spores.

    Ralph J. Delfino;Bruce D. Coate;Robert S. Zeiger;James M. Seltzer

  • Airway inflammation and oxidative potential of air pollutant particles in a pediatric asthma panel

    Ralph J Delfino;Norbert Staimer;Thomas Tjoa;Daniel L Gillen

  • The effect of outdoor fungal spore concentrations on daily asthma severity.

    Ralph J. Delfino;Robert S. Zeiger;James M. Seltzer;Donald H. Street

  • Association of asthma symptoms with peak particulate air pollution and effect modification by anti-inflammatory medication use.

    Ralph J Delfino;Robert S Zeiger;James M Seltzer;Donald H Street

  • Effects of Air Pollution on Emergency Room Visits for Respiratory Illnesses in Montreal, Quebec

    Ralph J. Delfino;Aileen M. Murphy-Moulton;Richard T. Burnett;Jeffrey R. Brook

  • Traffic-related air pollution and blood pressure in elderly subjects with coronary artery disease.

    Ralph J. Delfino;Thomas Tjoa;Daniel L. Gillen;Norbert Staimer

  • Performance evaluation of the active-flow personal DataRAM PM2.5 mass monitor (Thermo Anderson pDR-1200) designed for continuous personal exposure measurements

    Bhabesh Chakrabarti;Philip M. Fine;Ralph Delfino;Constantinos Sioutas

  • Associations of Primary and Secondary Organic Aerosols With Airway and Systemic Inflammation in an Elderly Panel Cohort

    Ralph J. Delfino;Norbert Staimer;Thomas Tjoa;Mohammad Arhami;Mohammad Arhami

  • Symptoms in pediatric asthmatics and air pollution: differences in effects by symptom severity, anti-inflammatory medication use and particulate averaging time.

    Ralph J. Delfino;Robert S. Zeiger;James M. Seltzer;Donald H. Street

  • Personal and ambient air pollution exposures and lung function decrements in children with asthma.

    Ralph J. Delfino;Norbert Staimer;Thomas Tjoa;Dan Gillen

  • Travel patterns during pregnancy: comparison between Global Positioning System (GPS) tracking and questionnaire data

    Jun Wu;Chengsheng Jiang;Guillermo Jaimes;Scott Bartell

Frequent Co-Authors

Constantinos Sioutas
Constantinos Sioutas University of Southern California
James J. Schauer
James J. Schauer University of Wisconsin–Madison
Jun Wu
Jun Wu University of California, Irvine
Martin M. Shafer
Martin M. Shafer University of Wisconsin–Madison
Scott Fruin
Scott Fruin University of Southern California
Sina Hasheminassab
Sina Hasheminassab University of Southern California
Hoda Anton-Culver
Hoda Anton-Culver University of California, Irvine
Larry D. Jamner
Larry D. Jamner University of California, Irvine
Robert S. Zeiger
Robert S. Zeiger Kaiser Permanente
Petros Koutrakis
Petros Koutrakis Harvard University

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