World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
43
Citations
7745
World Ranking
17134
National Ranking
4216

Robert Callender 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 Robert Callender sits on this spectrum.

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 publications 1,295+

This scientist: 180 publications — 25th percentile

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

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

Robert Callender 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 Robert Callender sits on this spectrum.

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 D-Index 159+

This scientist: 43 D-Index — 5th percentile

5% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 1985 - Fellow of American Physical Society (APS) Citation For his contributions to the understanding of the energy transduction process of visual pigments and for the development of physical techniques to study spectroscopically photolabile molecules

Overview

Robert Callender is affiliated with the Albert Einstein College of Medicine in the United States. Their research contributions have earned recognition within the scientific community, including the distinction of being named a Fellow of the American Physical Society (APS) in 1985. This honor was awarded for contributions to understanding the energy transduction process of visual pigments and for developing physical techniques to study spectroscopically photolabile molecules.

Throughout their career, Robert Callender has concentrated on the study of physical processes related to biological molecules, specifically focusing on those that change upon exposure to light. Their work intersects areas of physical chemistry and biophysics, particularly the mechanisms underlying visual pigments, which are critical for vision.

Their fellowship citation highlights two main scientific impacts: elucidating the energy transduction mechanisms in visual pigments and advancing spectroscopic methods to analyze molecules sensitive to light exposure. These areas of study are important within the broader context of molecular photophysics and photochemistry, emphasizing experimental approaches to understanding functional biological molecules.

Additional details about Robert Callender's publications, coauthors, or specific research topics beyond visual pigments and photolabile molecules are not available. Likewise, information on frequent publication venues or book publications has not been provided.

Best Publications

  • Fast Events in Protein Folding: Helix Melting and Formation in a Small Peptide

    Unknown

  • Resonance Raman studies of the purple membrane

    B. Aton;A. G. Doukas;R. H. Callender;B. Becher

  • Photoisomerization, energy storage, and charge separation: a model for light energy transduction in visual pigments and bacteriorhodopsin.

    B. Honig;T. Ebrey;R. H. Callender;U. Dinur

  • Fast events in protein folding: Relaxation dynamics of secondary and tertiary structure in native apomyoglobin

    Rudolf Gilmanshin;Skip Williams;Robert H. Callender;William H. Woodruff

  • Resonance Raman spectroscopy of rhodopsin in retinal disk membranes

    Unknown

  • INFRARED STUDIES OF FAST EVENTS IN PROTEIN FOLDING

    R. Brian Dyer;R. Brian Dyer;Feng Gai;Feng Gai;Feng Gai;William H. Woodruff;Rudolf Gilmanshin

  • Acid-base equilibrium of the Schiff base in bacteriorhodopsin.

    S. Druckmann;M. Ottolenghi;A. Pande;J. Pande

  • Molecular flow resonance Raman effect from retinal and rhodopsin.

    R. H. Callender;A. Doukas;R. Crouch;K. Nakanishi

  • Resonance Raman studies of bovine metarhodopsin I and metarhodopsin II.

    A. G. Doukas;B. Aton;R. H. Callender;T. G. Ebrey

  • The dynamical nature of enzymatic catalysis.

    Robert Callender;R. Brian Dyer

  • Resonance Raman studies of the primary photochemical event in visual pigments

    B. Aton;A.G. Doukas;D. Narva;R.H. Callender

  • Dispersion of Raman Cross Section in CdS and ZnO over a Wide Energy Range

    Unknown

  • RESONANCE RAMAN STUDIES OF VISUAL PIGMENTS

    Unknown

  • Probing protein dynamics using temperature jump relaxation spectroscopy

    Robert Callender;R Brian Dyer

  • Active site loop motion in triosephosphate isomerase: T-jump relaxation spectroscopy of thermal activation.

    Ruel Desamero;Sharon Rozovsky;Nick Zhadin;Ann McDermott

  • Advances in time-resolved approaches to characterize the dynamical nature of enzymatic catalysis

    Robert Callender;R. Brian Dyer

  • Nonresonance Raman Difference Spectroscopy: A General Probe of Protein Structure, Ligand Binding, Enzymatic Catalysis, and the Structures of Other Biomacromolecules

    Unknown

  • Femtosecond Polarized Pump-Probe and Stimulated Emission Spectroscopy of the Isomerization Reaction of Rhodopsin

    Gilad Haran;Elisabeth A. Morlino;Jens Matthes;Robert H. Callender

  • Correlation of vibrational frequencies with absorption maxima in polyenes, rhodopsin, bacteriorhodopsin, and retinal analogs

    Hiroko Kakitani;Hiroko Kakitani;Toshiaki Kakitani;Toshiaki Kakitani;Hillary Rodman;Barry Honig

  • Determination by Raman spectroscopy of the pKa of N5 of dihydrofolate bound to dihydrofolate reductase: mechanistic implications.

    Y.-Q. Chen;Joseph Kraut;Raymond L. Blakley;Robert Callender

  • Fluorescence quantum yield of visual pigments: evidence for subpicosecond isomerization rates

    A. G. Doukas;M. R. Junnarkar;R. R. Alfano;R. H. Callender

  • Ligand binding and protein dynamics in lactate dehydrogenase.

    J. R. Exequiel T. Pineda;Robert Callender;Steven D. Schwartz

  • Source of catalysis in the lactate dehydrogenase system. Ground -state interactions in the enzyme-substrate complex

    Hua Deng;Jie Zheng;Jie Zheng;Jie Zheng;Anthony Clarke;Anthony Clarke;Anthony Clarke;John J. Holbrook;John J. Holbrook;John J. Holbrook

  • The Approach to the Michaelis Complex in Lactate Dehydrogenase: The Substrate Binding Pathway

    Sebastian McClendon;Nick Zhadin;Robert Callender

  • Lactate Dehydrogenase Undergoes a Substantial Structural Change to Bind its Substrate

    Linlin Qiu;Miriam Gulotta;Robert Callender

Frequent Co-Authors

R. Brian Dyer
R. Brian Dyer Emory University
Vern L. Schramm
Vern L. Schramm Albert Einstein College of Medicine
Feng Gai
Feng Gai University of Pennsylvania
Jie Zheng
Jie Zheng University of California, Los Angeles
Dehua Pei
Dehua Pei The Ohio State University
Richard H. Furneaux
Richard H. Furneaux Victoria University of Wellington
Charles L. Brooks
Charles L. Brooks University of Michigan–Ann Arbor
Gilad Haran
Gilad Haran Weizmann Institute of Science
Ann E. McDermott
Ann E. McDermott Columbia University
Zhong Yin Zhang
Zhong Yin Zhang Purdue University West Lafayette

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