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D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 41 17701 4321 137 7425

Richard A. Keller publications per year

The chart shows the history of publications by Richard A. Keller between 1963 and 2019, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Richard A. Keller published across 57 years, from 1963 to 2019, averaging 3.5 papers a year. Output peaked at 23 publications in 1980. 1 of the 199 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1963 to 2019. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 1980. 1963: 1 publication 1964: 0 publications 1965: 4 publications 1966: 0 publications 1967: 1 publication 1968: 3 publications 1969: 4 publications 1970: 1 publication 1971: 5 publications 1972: 2 publications 1973: 5 publications 1974: 2 publications 1975: 4 publications 1976: 2 publications 1977: 0 publications 1978: 2 publications 1979: 0 publications 1980: 23 publications 1981: 7 publications 1982: 4 publications 1983: 7 publications 1984: 3 publications 1985: 6 publications 1986: 2 publications 1987: 9 publications 1988: 0 publications 1989: 6 publications 1990: 5 publications 1991: 5 publications 1992: 2 publications 1993: 11 publications 1994: 5 publications 1995: 5 publications 1996: 6 publications 1997: 10 publications 1998: 9 publications 1999: 9 publications 2000: 5 publications 2001: 3 publications 2002: 5 publications 2003: 3 publications 2004: 1 publication 2005: 2 publications 2006: 1 publication 2007: 1 publication 2008: 1 publication 2009: 0 publications 2010: 1 publication 2011: 3 publications 2012: 1 publication 2013: 0 publications 2014: 0 publications 2015: 1 publication 2016: 0 publications 2017: 0 publications 2018: 0 publications 2019: 1 publication
1963 2019

199 publications in total across all disciplines

View publications per year as a table
Richard A. Keller: publications per year, 1963 to 2019
Year Publications
1963 1
1964 0
1965 4
1966 0
1967 1
1968 3
1969 4
1970 1
1971 5
1972 2
1973 5
1974 2
1975 4
1976 2
1977 0
1978 2
1979 0
1980 23
1981 7
1982 4
1983 7
1984 3
1985 6
1986 2
1987 9
1988 0
1989 6
1990 5
1991 5
1992 2
1993 11
1994 5
1995 5
1996 6
1997 10
1998 9
1999 9
2000 5
2001 3
2002 5
2003 3
2004 1
2005 2
2006 1
2007 1
2008 1
2009 0
2010 1
2011 3
2012 1
2013 0
2014 0
2015 1
2016 0
2017 0
2018 0
2019 1
Total 199
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Richard A. Keller publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Richard A. Keller sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 121–140 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 137 publications — 10th percentile

10% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918 137
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Richard A. Keller D-index placement in Chemistry in 2026

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

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 40–41 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 41 D-Index — 2nd percentile

2% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289 41
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Research.com Recognitions

  • 2005 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

Richard A. Keller was affiliated with Los Alamos National Laboratory in the United States. Their research spanned multiple disciplines within medicine and biochemistry, genetics, and molecular biology. Over the course of their career, they contributed significantly to studies in gut microbiota and health, asthma and respiratory diseases, and digestive system-related conditions.

Throughout their publication record, Keller frequently collaborated with several coauthors, including Hermann Bremer-Neto, Heliard Rodrigues dos Santos Caetano, Marcos Natal Rufino, Sophia de Castro Bremer, and Luiz Waldemar de Oliveira. These collaborations supported a broad investigation into topics such as inflammatory bowel disease, microscopic colitis, and chronic obstructive pulmonary disease (COPD) research.

The main venues where their work appeared included Concilium, Research Society and Development, Nutrition Reviews, Journal of Allergy and Clinical Immunology, and Veterinary World.

Some recent papers authored by Keller are:

  • Synbiotics improve clinical indicators of ulcerative colitis: systematic review with meta-analysis (2021, Nutrition Reviews)
  • Incidence rates of childhood asthma with recurrent exacerbations in the US Environmental influences on Child Health Outcomes (ECHO) program (2023, Journal of Allergy and Clinical Immunology)
  • Prebiotics mannan-oligosaccharides accelerate sexual maturity in rats: A randomized preclinical study (2021, Veterinary World)
  • Probiotics, prebiotics and symbiotics attenuate chronic effects of passive smoking on physiological and biochemical parameters in rats: A randomized and controlled study (2021, Research Society and Development)
  • Evaluation of the Escherichia coli population in the intestinal microbiota of rattus wistar submitted to secondhand smoke and supplemented with prebiotics (2020, bioRxiv, Cold Spring Harbor Laboratory)

Keller's research contributed primarily to subfields such as molecular biology, genetics, physiology, food science, and nutrition and dietetics. Their work frequently addressed the interactions between diet, intestinal microbiota, and respiratory or digestive health, reflecting a multidisciplinary approach to understanding chronic diseases.

In recognition of their scientific contributions, Richard A. Keller was named a Fellow of the American Association for the Advancement of Science (AAAS) in 2005.

Best Publications

  • Detection of single fluorescent molecules

    E. Brooks Shera;Newton K. Seitzinger;Lloyd M. Davis;Richard A. Keller

  • Alterations of Single Molecule Fluorescence Lifetimes in Near-Field Optical Microscopy

    W. Patrick Ambrose;Peter M. Goodwin;Richard A. Keller;John C. Martin

  • Single molecule fluorescence analysis in solution

    Richard A. Keller;W. Patrick Ambrose;Peter M. Goodwin;James H. Jett

  • Single molecule detection and photochemistry on a surface using near-field optical excitation.

    W.P. Ambrose;P.M. Goodwin;J.C. Martin;R.A. Keller

  • Galvanic detection of optical absorptions in a gas discharge

    R. B. Green;R. A. Keller;G. G. Luther;P. K. Schenck

  • Detection of single molecules of phycoerythrin in hydrodynamically focused flows by laser-induced fluorescence.

    Dinh Cong Nguyen;Richard A. Keller;James H. Jett;John C. Martin

  • Single Molecule Detection in Solution

    Christoph Zander;Jörg Enderlein;Richard A. Keller

  • Single molecule detection in solution : methods and applications

    Christoph Zander;Jorg Enderlein;Richard A. Keller

  • High-speed DNA sequencing: an approach based upon fluorescence detection of single molecules.

    J H Jett;R A Keller;J C Martin;B L Marrone

  • Laser-induced fluorescence of flowing samples as an approach to single-molecule detection in liquids.

    Norman J. Dovichi;John C. Martin;James H. Jett;Mitchell. Trkula

  • THE PHOTOPHYSICAL CONSTANTS OF SEVERAL FLUORESCENT DYES PERTAINING TO ULTRASENSITIVE FLUORESCENCE SPECTROSCOPY

    Steve Allan Soper;Harvey L. Nutter;Richard A. Keller;Lloyd M. Davis

  • Method for rapid base sequencing in DNA and RNA with two base labeling

    James H. Jett;Richard A. Keller;John C. Martin;Richard G. Posner

  • Single-Molecule Detection in Liquids by Laser-Induced Fluorescence

    P.M. Goodwin;W.P. Ambrose;R.A. Keller

  • Detection and lifetime measurement of single molecules in flowing sample streams by laser‐induced fluorescence

    Charles W. Wilkerson;Peter M. Goodwin;W. Patrick Ambrose;John C. Martin

  • Determination of rate constants of reaction and lifetimes of singlet oxygen in solution by a flash photolysis technique

    Robert H. Young;David. Brewer;Richard A. Keller

  • SINGLE-MOLECULE DETECTION OF RHODAMINE 6G IN ETHANOLIC SOLUTIONS USING CONTINUOUS WAVE LASER EXCITATION

    Steve Allan Soper;E. Brooks Shera;John C. Martin;James H. Jett

  • Attogram detection limit for aqueous dye samples by laser-induced fluorescence

    Norman J. Dovichi;John C. Martin;James H. Jett;Richard A. Keller

  • Ring Puckering in Five‐Membered Rings. I. General Theory

    David O. Harris;Gail G. Engerholm;Chadwick A. Tolman;Alan C. Luntz

  • Enhancement of Absorption Spectra by Dye-Laser Quenching*

    Unknown

  • Fluorescence photon antibunching from single molecules on a surface

    W Patrick Ambrose;Peter M Goodwin;Jörg Enderlein;David J Semin

  • Laser induced impedance changes in a neon hollow cathode discharge. A mechanistic study

    E. F. Zalewski;R. A. Keller;R. Engleman

  • Characterization of DNA Size Determination of Small Fragments by Flow Cytometry

    Jeffrey T. Petty;Mitchell E. Johnson;Peter M. Goodwin;John C. Martin

  • Analysis of fluorescence lifetime data for single rhodamine molecules in flowing sample streams

    Joel. Tellinghuisen;Peter M. Goodwin;W. Patrick. Ambrose;John C. Martin

  • Application of Single Molecule Detection to Dna Sequencing

    Peter M. Goodwin;Hong Cai;James H. Jett;Susan L. Ishaug-Riley

Frequent Co-Authors

Jörg Enderlein
Jörg Enderlein University of Göttingen
James N. Demas
James N. Demas University of Virginia
Steven A. Soper
Steven A. Soper University of Kansas
Lawrence R. Pratt
Lawrence R. Pratt Tulane University
Norman J. Dovichi
Norman J. Dovichi University of Notre Dame
Larry A. Sklar
Larry A. Sklar University of New Mexico
Ming C. Wu
Ming C. Wu University of California, Berkeley
Michael W. Berns
Michael W. Berns University of California, Irvine
Joel R. Wendt
Joel R. Wendt Sandia National Laboratories
Robert K. Moyzis
Robert K. Moyzis University of California, Irvine

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