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Timothy L. Macdonald

Timothy L. Macdonald

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 74 4828 4389 1512 1262 260 15984
Biology and Biochemistry 74 5745 5297 2717 2436 233 15302

Timothy L. Macdonald publications per year

The chart shows the history of publications by Timothy L. Macdonald between 1974 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Timothy L. Macdonald published across 52 years, from 1974 to 2025, averaging 5.5 papers a year. Output peaked at 21 publications in 2001. 1 of the 287 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1974 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2001. 1974: 1 publication 1975: 4 publications 1976: 4 publications 1977: 0 publications 1978: 4 publications 1979: 2 publications 1980: 5 publications 1981: 5 publications 1982: 2 publications 1983: 3 publications 1984: 5 publications 1985: 5 publications 1986: 3 publications 1987: 2 publications 1988: 8 publications 1989: 10 publications 1990: 4 publications 1991: 4 publications 1992: 4 publications 1993: 5 publications 1994: 7 publications 1995: 4 publications 1996: 7 publications 1997: 10 publications 1998: 4 publications 1999: 6 publications 2000: 10 publications 2001: 21 publications 2002: 14 publications 2003: 8 publications 2004: 12 publications 2005: 16 publications 2006: 15 publications 2007: 13 publications 2008: 8 publications 2009: 9 publications 2010: 14 publications 2011: 10 publications 2012: 4 publications 2013: 4 publications 2014: 2 publications 2015: 3 publications 2016: 2 publications 2017: 0 publications 2018: 0 publications 2019: 0 publications 2020: 0 publications 2021: 0 publications 2022: 2 publications 2023: 1 publication 2024: 0 publications 2025: 1 publication
1974 2025

287 publications in total across all disciplines

View publications per year as a table
Timothy L. Macdonald: publications per year, 1974 to 2025
Year Publications
1974 1
1975 4
1976 4
1977 0
1978 4
1979 2
1980 5
1981 5
1982 2
1983 3
1984 5
1985 5
1986 3
1987 2
1988 8
1989 10
1990 4
1991 4
1992 4
1993 5
1994 7
1995 4
1996 7
1997 10
1998 4
1999 6
2000 10
2001 21
2002 14
2003 8
2004 12
2005 16
2006 15
2007 13
2008 8
2009 9
2010 14
2011 10
2012 4
2013 4
2014 2
2015 3
2016 2
2017 0
2018 0
2019 0
2020 0
2021 0
2022 2
2023 1
2024 0
2025 1
Total 287
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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.

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, 241–260 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: 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.

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
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100 260
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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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.

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, 74–75 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: 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.

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
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 74
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

  • 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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