World's Best Scientists 2026 revealed!
Timothy L. Macdonald

Timothy L. Macdonald

D-Index & Metrics

Biology and Biochemistry

D-Index
74
Citations
15302
World Ranking
5746
National Ranking
2718

Chemistry

D-Index
74
Citations
15984
World Ranking
4828
National Ranking
1512

Timothy L. Macdonald 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 Timothy L. Macdonald 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: 260 publications — 53rd percentile

53% of scientists in this discipline score the same or lower.

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

Timothy L. Macdonald 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 Timothy L. Macdonald 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: 74 D-Index — 75th percentile

75% 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

  • 1981 - Fellow of Alfred P. Sloan Foundation

Overview

Timothy L. Macdonald is affiliated with the University of Virginia in the United States. Their research spans multiple disciplines, predominantly within engineering, physics and astronomy, as well as biochemistry, genetics, and molecular biology.

The main fields of study for Macdonald include:

  • Engineering
  • Physics and Astronomy
  • Biochemistry, Genetics and Molecular Biology

More specific subfields covered in their research are:

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Dermatology
  • Molecular Biology
  • Cell Biology

The research topics they engage with highlight a focus on photonics, semiconductors, and skin-related biological studies. These topics include:

  • Photonic and Optical Devices
  • Advanced Fiber Laser Technologies
  • Semiconductor materials and devices
  • Skin Protection and Aging
  • Bioluminescence and chemiluminescence research
  • Melanin and skin pigmentation
  • Nonlinear Optical Materials Research

Macdonald has published papers in various scientific venues, including:

  • Optical Materials Express
  • Journal of Investigative Dermatology
  • arXiv (Cornell University)

Recent publications cover research in optical materials and dermatology, reflecting the interdisciplinary nature of their work. Notable papers include:

  • "Engineered second-order nonlinearity in silicon nitride," 2022, Optical Materials Express
  • "709 Malassezin: A preclinical assessment of a novel microbiome-based skin lightener," 2020, Journal of Investigative Dermatology
  • "Engineered second-order nonlinearity in silicon nitride," 2022, arXiv (Cornell University)

Frequent collaborators in Macdonald's work are:

  • Yi Zhang
  • Juniyali Nauriyal
  • Meiting Song
  • Marissa Granados Baez
  • Jaime Cárdenas

The scholar was recognized in 1981 as a Fellow of the Alfred P. Sloan Foundation.

Best Publications

  • Chemical mechanisms of catalysis by cytochromes P-450: a unified view

    F. Peter Guengerich;Timothy L. Macdonald

  • Immunosuppressive and Anti-Angiogenic Sphingosine 1-phosphate receptor-1 Agonists Induce Ubiquitinylation and Proteasomal Degradation of the Receptor

    Myat Lin Oo;Shobha Thangada;Ming-Tao Wu;Catherine H. Liu

  • S -Nitrosothiols signal the ventilatory response to hypoxia

    Andrew J. Lipton;Michael A. Johnson;Timothy Macdonald;Michael W. Lieberman

  • Sphingosine 1-phosphate analogs as receptor antagonists.

    Michael D. Davis;Jeremy J. Clemens;Timothy L. Macdonald;Kevin R. Lynch

  • Characterization of posttranslational modifications in neuron-specific class III beta-tubulin by mass spectrometry.

    Janice E. Alexander;Donald F. Hunt;Michael K. Lee;Jeffrey Shabanowitz

  • Aluminum ion in biological systems

    Unknown

  • Sphingosine Kinase 2 Is Required for Modulation of Lymphocyte Traffic by FTY720

    Yugesh Kharel;Sangderk Lee;Ashley H. Snyder;Stacey L. Sheasley-O'Neill

  • Selective A2A adenosine receptor activation reduces ischemia-reperfusion injury in rat kidney

    Mark D. Okusa;Joel Linden;Timothy Macdonald;Liping Huang

  • Selective sphingosine 1-phosphate 1 receptor activation reduces ischemia-reperfusion injury in mouse kidney

    Alaa S. Awad;Hong Ye;Liping Huang;Li Li

  • Cyclic AMP-dependent inhibition of human neutrophil oxidative activity by substituted 2-propynylcyclohexyl adenosine A2A receptor agonists

    Gail W Sullivan;Jayson M Rieger;W Michael Scheld;Timothy L Macdonald

  • A2A adenosine receptor-mediated inhibition of renal injury and neutrophil adhesion

    Mark D. Okusa;Joel Linden;Liping Huang;Jayson M. Rieger

  • Evidence for a 1-Electron Oxidation Mechanism in N-Dealkylation of N,N-Dialkylanilines by Cytochrome P450 2B1 KINETIC HYDROGEN ISOTOPE EFFECTS, LINEAR FREE ENERGY RELATIONSHIPS, COMPARISONS WITH HORSERADISH PEROXIDASE, AND STUDIES WITH OXYGEN SURROGATES

    F P Guengerich;C H Yun;T L Macdonald

  • Synthesis and biological evaluation of gamma-aminophosphonates as potent, subtype-selective sphingosine 1-phosphate receptor agonists and antagonists.

    Frank W. Foss;Ashley H. Snyder;Michael D. Davis;Michael Rouse

  • Allyloxy carbanions. New synthesis of aldehydes via a .beta.-acyl carbanion equivalent

    W. Clark Still;T. L. Macdonald

  • Physical properties and synthetic utility of .alpha.-alkoxyorganolithium species as studied through ligand selectivity in tin-lithium exchange

    J. Scott. Sawyer;Andrew. Kucerovy;Timothy L. Macdonald;Glenn J. McGarvey

  • In vitro metabolism of tolcapone to reactive intermediates: relevance to tolcapone liver toxicity.

    Kirsten S Smith;Philip L Smith;Tiffany N Heady;Joel M Trugman

  • Mechanism of cytochrome P-450 inhibition by cyclopropylamines

    Timothy L. Macdonald;Karimullah Zirvi;Leo T. Burka;Pamela Peyman

  • Mechanisms of cytochrome P‐450 catalysis

    Unknown

  • Reductive Assays forS-Nitrosothiols: Implications for Measurements in Biological Systems☆☆☆★

    Kezhong Fang;N.Virginia Ragsdale;Robert M. Carey;Timothy MacDonald

  • S-Nitrosothiols signal hypoxia-mimetic vascular pathology

    Lisa A. Palmer;Allan Doctor;Preeti Chhabra;Mary Lynn Sheram

  • Oxidation of substituted N,N-dimethylanilines by cytochrome P-450: estimation of the effective oxidation-reduction potential of cytochrome P-450

    Macdonald Tl;Gutheim Wg;Martin Rb;Guengerich Fp

  • Lysophosphatidic acid-induced mitogenesis is regulated by lipid phosphate phosphatases and is Edg-receptor independent.

    Shelley B. Hooks;Webster L. Santos;Dong-Soon Im;Christopher E. Heise

Frequent Co-Authors

Kevin R. Lynch
Kevin R. Lynch University of Virginia
Joel Linden
Joel Linden University of Virginia
George A. Beller
George A. Beller University of Virginia
Paul S. Hoffman
Paul S. Hoffman University of Virginia
Benjamin Gaston
Benjamin Gaston Indiana University
Yves Pommier
Yves Pommier National Institutes of Health
Richard L. Guerrant
Richard L. Guerrant University of Virginia
F. Peter Guengerich
F. Peter Guengerich Vanderbilt University
Edward Perez-Reyes
Edward Perez-Reyes University of Virginia
Eric R. Houpt
Eric R. Houpt University of Virginia

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Related Online Degrees & Career Pathways

Studying Chemistry in the USA opens doors to a variety of specialized career paths, especially when combined with fields like forensic science. Many students are now exploring related options that complement their chemistry background, such as becoming an autopsy technician jobs, where detailed chemical knowledge assists in understanding biological processes during post-mortem examinations.

For those interested in advancing their education, there are numerous online colleges for forensic science that offer flexible learning opportunities. These programs provide essential skills to analyze physical evidence, often integrating chemistry principles directly into the curriculum.

Additionally, pursuing an online masters degree in forensic psychology can complement a chemistry degree by focusing on the psychological aspects behind criminal behavior, enhancing your versatility in the forensic field.

Overall, combining chemistry with forensic science opens diverse forensic career paths, ranging from lab analysis to crime scene investigation, making it a promising area of study with practical applications in law enforcement and healthcare.

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