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D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Environmental Sciences 43 6959 2479 99 10650

John R. Froines publications per year

The chart shows the history of publications by John R. Froines between 1965 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. John R. Froines published across 57 years, from 1965 to 2021, averaging 1.9 papers a year. Output peaked at 10 publications in 2005. 2 of the 110 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1965 to 2021. Vertical axis: number of publications, 0 to 10. Peak 10 publications in 2005. 1965: 1 publication 1966: 0 publications 1967: 0 publications 1968: 0 publications 1969: 1 publication 1970: 0 publications 1971: 0 publications 1972: 1 publication 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 1 publication 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 1 publication 1985: 5 publications 1986: 6 publications 1987: 1 publication 1988: 3 publications 1989: 2 publications 1990: 3 publications 1991: 2 publications 1992: 4 publications 1993: 3 publications 1994: 1 publication 1995: 1 publication 1996: 1 publication 1997: 1 publication 1998: 0 publications 1999: 5 publications 2000: 3 publications 2001: 2 publications 2002: 5 publications 2003: 4 publications 2004: 7 publications 2005: 10 publications 2006: 3 publications 2007: 6 publications 2008: 8 publications 2009: 5 publications 2010: 4 publications 2011: 1 publication 2012: 0 publications 2013: 3 publications 2014: 0 publications 2015: 2 publications 2016: 1 publication 2017: 0 publications 2018: 1 publication 2019: 0 publications 2020: 1 publication 2021: 1 publication
1965 2021

110 publications in total across all disciplines

View publications per year as a table
John R. Froines: publications per year, 1965 to 2021
Year Publications
1965 1
1966 0
1967 0
1968 0
1969 1
1970 0
1971 0
1972 1
1973 0
1974 0
1975 0
1976 0
1977 0
1978 0
1979 1
1980 0
1981 0
1982 0
1983 0
1984 1
1985 5
1986 6
1987 1
1988 3
1989 2
1990 3
1991 2
1992 4
1993 3
1994 1
1995 1
1996 1
1997 1
1998 0
1999 5
2000 3
2001 2
2002 5
2003 4
2004 7
2005 10
2006 3
2007 6
2008 8
2009 5
2010 4
2011 1
2012 0
2013 3
2014 0
2015 2
2016 1
2017 0
2018 1
2019 0
2020 1
2021 1
Total 110
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John R. Froines 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 John R. Froines sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 91–100 publications, is where this scientist sits. 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: 282 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: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 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 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 99 publications — 13th percentile

13% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440 99
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155
281–290 130
291–300 127
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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John R. Froines 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 John R. Froines sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 43 D-Index, is where this scientist sits. 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: 198 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: 20 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: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 43 D-Index — 29th percentile

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

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275
40 321
41 343
42 305
43 336 43
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
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Overview

John R. Froines was affiliated with the University of California, Los Angeles in the United States. Their research primarily focused on Environmental Science, with particular emphasis on Health, Toxicology and Mutagenesis. Their subfields of study included Molecular Biology to a lesser degree.

The scientist's work explored various topics related to air quality and health impacts, climate change and health impacts, indoor air quality and microbial exposure, as well as the biochemical aspects involving heme oxygenase-1 and carbon monoxide.

Among the recent papers attributed to John R. Froines were:

  • Combined adjuvant effects of ambient vapor-phase organic components and particulate matter potently promote allergic sensitization and Th2-skewing cytokine and chemokine milieux in mice: The importance of mechanistic multi-pollutant research, 2021, published in Toxicology Letters
  • Chemical and Biological Characterization of Particulate Matter (PM 2.5) and Volatile Organic Compounds Collected at Different Sites in the Los Angeles Basin, 2020, published in Applied Sciences

Frequent coauthors in their publications included Arthur K. Cho, Ning Li, Ryan P. Lewandowski, Damansher Sidhu, and Carine Lidiane Holz.

The venues where John R. Froines contributed included Toxicology Letters and Applied Sciences, each featuring recent contributions.

Best Publications

  • Ultrafine particulate pollutants induce oxidative stress and mitochondrial damage.

    Ning Li;Constantinos Sioutas;Arthur Cho;Debra Schmitz

  • Redox activity of airborne particulate matter at different sites in the Los Angeles Basin.

    Arthur K. Cho;Constantinos Sioutas;Constantinos Sioutas;Antonio H. Miguel;Yoshito Kumagai;Yoshito Kumagai

  • Evaluating the toxicity of airborne particulate matter and nanoparticles by measuring oxidative stress potential--a workshop report and consensus statement.

    Jon G. Ayres;Paul Borm;Flemming R. Cassee;Vincent Castranova

  • Air pollution and case fatality of SARS in the People's Republic of China: an ecologic study

    Yan Cui;Zuo Feng Zhang;John Froines;Jinkou Zhao

  • Determination of Four Quinones in Diesel Exhaust Particles, SRM 1649a, and Atmospheric PM2.5Special Issue ofAerosol Science and Technologyon Findings from the Fine Particulate Matter Supersites Program

    Arthur K. Cho;Emma Di Stefano;Ying You;Chester E. Rodriguez

  • Use of a stratified oxidative stress model to study the biological effects of ambient concentrated and diesel exhaust particulate matter

    Ning Li;Seongheon Kim;Meiying Wang;John Froines

  • Relationship between redox activity and chemical speciation of size-fractionated particulate matter

    Leonidas Ntziachristos;John R Froines;Arthur K Cho;Constantinos Sioutas

  • Physicochemical and redox characteristics of particulate matter (PM) emitted from gasoline and diesel passenger cars

    Michael D. Geller;Leonidas Ntziachristos;Athanasios Mamakos;Zissis Samaras

  • Versatile aerosol concentration enrichment system (VACES) for simultaneous in vivo and in vitro evaluation of toxic effects of ultrafine, fine and coarse ambient particles Part I: Development and laboratory characterization

    Seongheon Kim;Peter A Jaques;Mingchih Chang;John R Froines

  • Penetration of freeway ultrafine particles into indoor environments

    Yifang Zhu;William C. Hinds;Margaret Krudysz;Thomas Kuhn

  • Seasonal and spatial variation of polycyclic aromatic hydrocarbons in vapor-phase and PM2.5 in Southern California urban and rural communities

    Arantzazu Eiguren-Fernandez;Antonio H. Miguel;John R. Froines;Suresh Thurairatnam

  • The U.S. Environmental Protection Agency Particulate Matter Health Effects Research Centers Program: a midcourse report of status, progress, and plans.

    Morton Lippmann;Mark Frampton;Joel Schwartz;Douglas Dockery

  • Aircraft emissions and local air quality impacts from takeoff activities at a large International Airport

    Yifang Zhu;Elinor Fanning;Rong Chun Yu;Qunfang Zhang

  • Organophosphorous pesticide exposure increases the frequency of sperm sex null aneuploidy.

    Rogelio Recio;Wendy A. Robbins;Guadalupe Ocampo-Gomez;Victor Borja-Aburto

  • Sodium arsenite administration via drinking water increases genome-wide and Ha-ras DNA hypomethylation in methyl-deficient C57BL/6J mice

    R.S. Okoji;R.C. Yu;R.R. Maronpot;J.R. Froines

  • Inhalation of Concentrated Ambient Particulate Matter near a Heavily Trafficked Road Stimulates Antigen-Induced Airway Responses in Mice

    Michael T Kleinman;Ali Hamade;Dianne Meacher;Michael Oldham

  • An examination of quinone toxicity using the yeast Saccharomyces cerevisiae model system

    Chester E Rodriguez;Masaru Shinyashiki;John Froines;Rong Chun Yu

  • Determination of metal-based hydroxyl radical generating capacity of ambient and diesel exhaust particles.

    Emma DiStefano;Arantzazu Eiguren-Fernandez;Ralph J. Delfino;Constantinos Sioutas

  • Exposure to inhaled particulate matter activates early markers of oxidative stress, inflammation and unfolded protein response in rat striatum

    R. Guerra;E. Vera-Aguilar;M. Uribe-Ramirez;G. Gookin

  • Seasonal variation of the particle size distribution of polycyclic aromatic hydrocarbons and of major aerosol species in Claremont, California

    Antonio H. Miguel;Arantzazu Eiguren-Fernandez;Peter A. Jaques;John R. Froines

  • CHARACTERIZATION AND IN VITRO BIOLOGICAL EFFECTS OF CONCENTRATED PARTICULATE MATTER FROM MEXICO CITY

    A. De Vizcaya-Ruiz;M. E. Gutiérrez-Castillo;M. E. Gutiérrez-Castillo;M. Uribe-Ramirez;M. E. Cebrián

Frequent Co-Authors

Arthur K. Cho
Arthur K. Cho University of California, Los Angeles
Constantinos Sioutas
Constantinos Sioutas University of Southern California
Yoshito Kumagai
Yoshito Kumagai University of Tsukuba
Jon M. Fukuto
Jon M. Fukuto Sonoma State University
Andre E. Nel
Andre E. Nel University of California, Los Angeles
Edward L. Avol
Edward L. Avol University of Southern California
Ralph J. Delfino
Ralph J. Delfino University of California, Irvine
Philip M. Fine
Philip M. Fine University of Southern California
Yifang Zhu
Yifang Zhu University of California, Los Angeles
Günter Oberdörster
Günter Oberdörster University of Rochester

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