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Barbara N. Timmermann

Barbara N. Timmermann

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 59 10313 9326 2855 2348 199 10631

Barbara N. Timmermann publications per year

The chart shows the history of publications by Barbara N. Timmermann between 1971 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Barbara N. Timmermann published across 55 years, from 1971 to 2025, averaging 4.6 papers a year. Output peaked at 24 publications in 2012. 1 of the 255 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1971 to 2025. Vertical axis: number of publications, 0 to 24. Peak 24 publications in 2012. 1971: 1 publication 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 1 publication 1976: 1 publication 1977: 0 publications 1978: 0 publications 1979: 2 publications 1980: 4 publications 1981: 2 publications 1982: 1 publication 1983: 4 publications 1984: 3 publications 1985: 3 publications 1986: 3 publications 1987: 5 publications 1988: 11 publications 1989: 1 publication 1990: 3 publications 1991: 1 publication 1992: 0 publications 1993: 3 publications 1994: 1 publication 1995: 3 publications 1996: 7 publications 1997: 2 publications 1998: 5 publications 1999: 13 publications 2000: 8 publications 2001: 9 publications 2002: 7 publications 2003: 11 publications 2004: 13 publications 2005: 9 publications 2006: 11 publications 2007: 4 publications 2008: 4 publications 2009: 6 publications 2010: 13 publications 2011: 8 publications 2012: 24 publications 2013: 14 publications 2014: 9 publications 2015: 7 publications 2016: 4 publications 2017: 2 publications 2018: 3 publications 2019: 4 publications 2020: 0 publications 2021: 1 publication 2022: 3 publications 2023: 0 publications 2024: 0 publications 2025: 1 publication
1971 2025

255 publications in total across all disciplines

View publications per year as a table
Barbara N. Timmermann: publications per year, 1971 to 2025
Year Publications
1971 1
1972 0
1973 0
1974 0
1975 1
1976 1
1977 0
1978 0
1979 2
1980 4
1981 2
1982 1
1983 4
1984 3
1985 3
1986 3
1987 5
1988 11
1989 1
1990 3
1991 1
1992 0
1993 3
1994 1
1995 3
1996 7
1997 2
1998 5
1999 13
2000 8
2001 9
2002 7
2003 11
2004 13
2005 9
2006 11
2007 4
2008 4
2009 6
2010 13
2011 8
2012 24
2013 14
2014 9
2015 7
2016 4
2017 2
2018 3
2019 4
2020 0
2021 1
2022 3
2023 0
2024 0
2025 1
Total 255
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Barbara N. Timmermann 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 Barbara N. Timmermann 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, 181–200 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: 199 publications — 32nd percentile

32% 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 1,344 199
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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Barbara N. Timmermann 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 Barbara N. Timmermann 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, 58–59 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: 59 D-Index — 44th percentile

44% 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 59
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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Overview

Barbara N. Timmermann is affiliated with the University of Kansas in the United States. Their research primarily focuses on Medicine, with key contributions in Oncology, Modeling and Simulation, General Health Professions, Molecular Biology, and Health, Toxicology and Mutagenesis.

The scientist's work covers various emergent topics, prominently including:

  • COVID-19 and healthcare impacts
  • COVID-19 epidemiological studies
  • Climate Change and Health Impacts
  • Global Health Care Issues
  • Healthcare cost, quality, practices
  • COVID-19 Clinical Research Studies
  • Heat shock proteins research

Barbara N. Timmermann has published several papers in notable journals such as DMW - Deutsche Medizinische Wochenschrift, Frontiers in Public Health, Journal of Infection, Deutsches Ärzteblatt international, and Melanoma Research. Selected research papers include:

  • COVID-19: Heterogeneous Excess Mortality and "Burden of Disease" in Germany and Italy and Their States and Regions, January-June 2020 (2021), Frontiers in Public Health
  • A novel C-terminal Hsp90 inhibitor KU758 synergizes efficacy in combination with BRAF or MEK inhibitors and targets drug-resistant pathways in BRAF-mutant melanomas (2021), Melanoma Research
  • COVID-19: Spatial resolution of excess mortality in Germany and Italy (2020), Journal of Infection
  • COVID-19: Wie änderte sich die Sterblichkeit? - Mortalität von Frauen und Männern in Deutschland und seinen Bundesländern bis Oktober 2020 (2020), DMW - Deutsche Medizinische Wochenschrift
  • Increased mortality in Germany and in the individual German states during the SARS-CoV-2-/COVID-19 pandemic in 2020 and 2021 (2022), Deutsches Ärzteblatt international

The researcher has collaborated frequently with the following co-authors:

  • Peter Morfeld
  • Philip Lewis
  • Thomas C. Erren
  • J. Valérie Groß
  • Pierluigi Cocco

Barbara N. Timmermann's interdisciplinary approach spans detailed clinical research studies on COVID-19 alongside investigations into molecular mechanisms such as heat shock proteins and oncological drug resistance pathways.

Best Publications

  • Inhibitory effect of six green tea catechins and caffeine on the growth of four selected human tumor cell lines.

    Susanne Valcic;Barbara N. Timmermann;David S. Alberts;Gerald A. Wächter

  • The effect of extracts from ginger rhizome on inflammatory mediator production.

    R.C. Lantz;G.J. Chen;M. Sarihan;A.M. Sólyom

  • Fresh organically grown ginger (Zingiber officinale): composition and effects on LPS-induced PGE2 production.

    Shivanand D. Jolad;R.Clark Lantz;Aniko M. Solyom;Guan Jie Chen

  • The effect of turmeric extracts on inflammatory mediator production.

    R.C. Lantz;G.J. Chen;A.M. Solyom;S.D. Jolad

  • Commercially processed dry ginger (Zingiber officinale): composition and effects on LPS-stimulated PGE2 production.

    Shivanand D. Jolad;R. Clark Lantz;Guan Jie Chen;Robert B. Bates

  • Turmeric extracts containing curcuminoids prevent experimental rheumatoid arthritis.

    Janet L. Funk;Janice N. Oyarzo;Jennifer B. Frye;Guanjie Chen

  • Formulation design and photochemical studies on nanocrystal solid dispersion of curcumin with improved oral bioavailability.

    Satomi Onoue;Haruki Takahashi;Yohei Kawabata;Yoshiki Seto

  • Antioxidant chemistry of green tea catechins. Identification of products of the reaction of (-)-epigallocatechin gallate with peroxyl radicals.

    Susanne Valcic;Annette Muders;Neil E. Jacobsen;Daniel C. Liebler

  • Interactions of Green Tea Catechins with Organic Anion-Transporting Polypeptides

    Megan Roth;Barbara N. Timmermann;Bruno Hagenbuch

  • Metabolic profiling and phylogenetic analysis of medicinal Zingiber species: Tools for authentication of ginger (Zingiber officinale Rosc).

    Hongliang Jiang;Zhengzhi Xie;Hyun Jo Koo;Steven P. McLaughlin

  • Antioxidant chemistry of green tea catechins. New oxidation products of (-)-epigallocatechin gallate and (-)-epigallocatechin from their reactions with peroxyl radicals.

    Susanne Valcic;Jeanne A. Burr;Barbara N. Timmermann;Daniel C. Liebler

  • Efficacy and mechanism of action of turmeric supplements in the treatment of experimental arthritis.

    Janet L. Funk;Jennifer B. Frye;Janice N. Oyarzo;Nesrin Kuscuoglu

  • Inhibition of ultraviolet B–induced c-fos gene expression and p38 mitogen-activated protein kinase activation by (-)-epigallocatechin gallate in a human keratinocyte cell line

    Weixing Chen;Zigang Dong;Susanne Valcic;Barbara N. Timmermann

  • Prevention of photocarcinogenesis by topical administration of pure epigallocatechin gallate isolated from green tea

    Helen L. Gensler;Barbara N. Timmermann;Susanne Valcic;Gerald A. Wächter

  • Characterization of gingerol-related compounds in ginger rhizome (Zingiber officinale Rosc.) by high-performance liquid chromatography/electrospray ionization mass spectrometry.

    Hongliang Jiang;Anikó M. Sólyom;Barbara N. Timmermann;David R. Gang

  • (-)-Epigallocatechin-3-gallate inhibition of ultraviolet B-induced AP-1 activity.

    M. Barthelman;W. B. Bair;K. K. Stickland;Weixing Chen

  • Biosynthesis of curcuminoids and gingerols in turmeric (Curcuma longa) and ginger (Zingiber officinale): identification of curcuminoid synthase and hydroxycinnamoyl-CoA thioesterases.

    Maria del Carmen Ramirez-Ahumada;Barbara N. Timmermann;David R. Gang

  • Structure−Activity Relationship Studies of Nordihydroguaiaretic Acid Inhibitors toward Soybean, 12-Human, and 15-Human Lipoxygenase

    Stephanie Whitman;Mikail Gezginci;Barbara N Timmermann;Theodore R Holman

  • Use of liquid chromatography-electrospray ionization tandem mass spectrometry to identify diarylheptanoids in turmeric (Curcuma longa L.) rhizome.

    Hongliang Jiang;Barbara N. Timmermann;David R. Gang

  • Bioactivity of Turmeric-Derived Curcuminoids and Related Metabolites in Breast Cancer

    Laura E. Wright;Jennifer B. Frye;Bhavana Gorti;Barbara N. Timmermann

  • Anti-Inflammatory Effects of the Essential Oils of Ginger (Zingiber officinale Roscoe) in Experimental Rheumatoid Arthritis.

    Janet L. Funk;Jennifer B. Frye;Janice N. Oyarzo;Jianling Chen

  • Antitubercular constituents of Valeriana laxiflora.

    Jian Qiao Gu;Yuehong Wang;Scott G. Franzblau;Gloria Montenegro

  • Tandem mass spectrometry studies of green tea catechins. Identification of three minor components in the polyphenolic extract of green tea

    Petra Miketova;Karl H. Schram;Jeff Whitney;Michael Li

  • Interaction of Green Tea Catechins with Organic Anion Transporting Polypeptides

    Megan Roth;Barbara Timmermann;Bruno Hagenbuch

Frequent Co-Authors

Robert B. Bates
Robert B. Bates University of Arizona
Scott G. Franzblau
Scott G. Franzblau University of Illinois at Chicago
Victor W. Day
Victor W. Day University of Kansas
David R. Gang
David R. Gang Washington State University
Jeffrey Aubé
Jeffrey Aubé University of North Carolina at Chapel Hill
Bruno Hagenbuch
Bruno Hagenbuch University of Kansas
Joshua D. Lambert
Joshua D. Lambert Pennsylvania State University
Tom J. Mabry
Tom J. Mabry The University of Texas at Austin
daniel c liebler
daniel c liebler Vanderbilt University
James J. Moon
James J. Moon University of Michigan–Ann Arbor

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