World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 63 8501 2440 199 12984

Martha L. Ludwig publications per year

The chart shows the history of publications by Martha L. Ludwig between 1955 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Martha L. Ludwig published across 71 years, from 1955 to 2025, averaging 3.4 papers a year. Output peaked at 16 publications in 1997. 7 of the 244 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1955 to 2025. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 1997. 1955: 1 publication 1956: 0 publications 1957: 1 publication 1958: 1 publication 1959: 1 publication 1960: 2 publications 1961: 0 publications 1962: 3 publications 1963: 1 publication 1964: 0 publications 1965: 1 publication 1966: 1 publication 1967: 4 publications 1968: 0 publications 1969: 2 publications 1970: 0 publications 1971: 0 publications 1972: 5 publications 1973: 1 publication 1974: 1 publication 1975: 2 publications 1976: 0 publications 1977: 1 publication 1978: 3 publications 1979: 1 publication 1980: 0 publications 1981: 2 publications 1982: 1 publication 1983: 4 publications 1984: 5 publications 1985: 3 publications 1986: 1 publication 1987: 2 publications 1988: 1 publication 1989: 2 publications 1990: 3 publications 1991: 6 publications 1992: 2 publications 1993: 4 publications 1994: 9 publications 1995: 6 publications 1996: 9 publications 1997: 16 publications 1998: 6 publications 1999: 9 publications 2000: 5 publications 2001: 4 publications 2002: 7 publications 2003: 5 publications 2004: 13 publications 2005: 8 publications 2006: 5 publications 2007: 4 publications 2008: 8 publications 2009: 6 publications 2010: 1 publication 2011: 3 publications 2012: 6 publications 2013: 5 publications 2014: 4 publications 2015: 0 publications 2016: 6 publications 2017: 8 publications 2018: 4 publications 2019: 3 publications 2020: 2 publications 2021: 5 publications 2022: 1 publication 2023: 1 publication 2024: 4 publications 2025: 3 publications
1955 2025

244 publications in total across all disciplines

View publications per year as a table
Martha L. Ludwig: publications per year, 1955 to 2025
Year Publications
1955 1
1956 0
1957 1
1958 1
1959 1
1960 2
1961 0
1962 3
1963 1
1964 0
1965 1
1966 1
1967 4
1968 0
1969 2
1970 0
1971 0
1972 5
1973 1
1974 1
1975 2
1976 0
1977 1
1978 3
1979 1
1980 0
1981 2
1982 1
1983 4
1984 5
1985 3
1986 1
1987 2
1988 1
1989 2
1990 3
1991 6
1992 2
1993 4
1994 9
1995 6
1996 9
1997 16
1998 6
1999 9
2000 5
2001 4
2002 7
2003 5
2004 13
2005 8
2006 5
2007 4
2008 8
2009 6
2010 1
2011 3
2012 6
2013 5
2014 4
2015 0
2016 6
2017 8
2018 4
2019 3
2020 2
2021 5
2022 1
2023 1
2024 4
2025 3
Total 244
Download as CSV

Martha L. Ludwig 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 Martha L. Ludwig 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
Download as CSV

Martha L. Ludwig 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 Martha L. Ludwig 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, 62–63 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: 63 D-Index — 54th percentile

54% 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 63
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
Download as CSV

Overview

Martha L. Ludwig was affiliated with the University of Michigan-Ann Arbor in the United States. Their research primarily focused on biochemistry, genetics, molecular biology, and agricultural and biological sciences, with a significant emphasis on molecular biology and plant science subfields.

The main topics covered in their work included photosynthetic processes and mechanisms, algal biology and biofuel production, lipid metabolism and biosynthesis, plant nutrient uptake and metabolism, plant water relations and carbon dynamics, plant molecular biology research, and mitochondrial function and pathology.

Their recent published papers illustrate a focus on photosynthesis, particularly in C4 plants and related evolutionary pathways. These papers include:

  • Installation of C4 photosynthetic pathway enzymes in rice using a single construct (2020, Plant Biotechnology Journal)
  • Metabolic profiles in C3, C3-C4 intermediate, C4-like, and C4 species in the genus Flaveria (2021, Journal of Experimental Botany)
  • The Calvin-Benson-Bassham cycle in C4 and Crassulacean acid metabolism species (2023, Seminars in Cell and Developmental Biology)
  • The coordination of major events in C4 photosynthesis evolution in the genus Flaveria (2021, Scientific Reports)
  • Tribulus (Zygophyllaceae) as a case study for the evolution of C2 and C4 photosynthesis (2024, Plant Cell & Environment)

The scientist collaborated frequently with other researchers, including Sarah Covshoff, Rowan F. Sage, Florian A. Busch, Steven Kelly, and Julian M. Hibberd. These co-authors appeared frequently alongside them in publications, indicating ongoing research partnerships.

Their work was published across various venues such as Plant Biotechnology Journal, Journal of Experimental Botany, Seminars in Cell and Developmental Biology, Scientific Reports, and Plant Cell & Environment.

In addition to journal articles, they also contributed to book publications. Notably, they published a book titled Understanding C4 Evolution and Function (2021) through Frontiers Media.

Best Publications

  • THE DIVERSITY AND COEVOLUTION OF RUBISCO, PLASTIDS, PYRENOIDS, AND CHLOROPLAST-BASED CO2-CONCENTRATING MECHANISMS IN ALGAE

    Murray R Badger;T John Andrews;S M Whitney;Martha Ludwig

  • The structure and properties of methylenetetrahydrofolate reductase from Escherichia coli suggest how folate ameliorates human hyperhomocysteinemia.

    Brian D. Guenther;Christal A. Sheppard;Pamela Tran;Rima Rozen

  • Structure-function in Escherichia coli iron superoxide dismutase: comparisons with the manganese enzyme from Thermus thermophilus.

    Myoung S. Lah;Melinda M. Dixon;Katherine A. Pattridge;William C. Stallings

  • Thioredoxin reductase two modes of catalysis have evolved.

    C H Williams;L D Arscott;S Müller;B W Lennon

  • Structure-Based Perspectives on B12-Dependent Enzymes

    Martha L. Ludwig;Rowena G. Matthews

  • Phthalate Dioxygenase Reductase: A Modular Structure for Electron Transfer from Pyridine Nucleotides to [2Fe-2S]

    Carl C. Correll;Christopher J. Batie;Christopher J. Batie;David P. Ballou;Martha L. Ludwig

  • The structure of the oxidized form of clostridial flavodoxin at 1.9-A resolution.

    Roger M. Burnett;George D. Darling;Douglas S. Kendall;Mary E. LeQuesne

  • Twists in Catalysis: Alternating Conformations of Escherichia coli Thioredoxin Reductase

    Brett W. Lennon;Charles H. Williams;Charles H. Williams;Martha L. Ludwig

  • Structure of the semiquinone form of flavodoxin from Clostridum MP. Extension of 1.8 A resolution and some comparisons with the oxidized state.

    Ward W. Smith;Roger M. Burnett;George D. Darling;Martha L. Ludwig

  • Manganese superoxide dismutase from Thermus thermophilus. A structural model refined at 1.8 A resolution.

    Martha L. Ludwig;Anita L. Metzger;Katherine A. Pattridge;William C. Stallings

  • The structure of manganese superoxide dismutase from Thermus thermophilus HB8 at 2.4-A resolution.

    W C Stallings;K A Pattridge;R K Strong;M L Ludwig

  • The mobile flavin of 4-OH benzoate hydroxylase.

    Domenico L. Gatti;Bruce A. Palfey;Myoung Soo Lah;Barrie Entsch

  • Plant Carbonic Anhydrases: Structures, Locations, Evolution, and Physiological Roles

    Robert J. DiMario;Harmony Clayton;Ananya Mukherjee;Martha Ludwig

  • The functioning of the CO2 concentrating mechanism in several cyanobacterial strains: a review of general physiological characteristics, genes, proteins, and recent advances

    G Dean Price;Dieter Sültemeyer;Barbara Klughammer;Martha Ludwig

  • Control of oxidation-reduction potentials in flavodoxin from Clostridium beijerinckii: the role of conformation changes.

    Martha L. Ludwig;Katherine A. Pattridge;Anita L. Metzger;Melinda M. Dixon

  • Manganese and iron superoxide dismutases are structural homologs.

    W C Stallings;K A Pattridge;R K Strong;M L Ludwig

  • 2 Flavodoxins and Electron-Transferring Flavoproteins

    Stephen G. Mayhew;Martha L. Ludwig

  • Structural prototypes for an extended family of flavoprotein reductases: comparison of phthalate dioxygenase reductase with ferredoxin reductase and ferredoxin.

    C. C. Correll;M. L. Ludwig;C. M. Bruns;P. A. Karplus

  • Structures of the N-terminal modules imply large domain motions during catalysis by methionine synthase.

    John C. Evans;Donald P. Huddler;Mark T. Hilgers;Gail Romanchuk

  • Iron superoxide dismutase. Nucleotide sequence of the gene from Escherichia coli K12 and correlations with crystal structures.

    A Carlioz;M L Ludwig;W C Stallings;J A Fee

  • Crystal structure of reduced thioredoxin reductase from Escherichia coli: structural flexibility in the isoalloxazine ring of the flavin adenine dinucleotide cofactor.

    Brett W. Lennon;Charles H. Williams;Charles H. Williams;Martha L. Ludwig

  • Cobalamin-independent methionine synthase (MetE): a face-to-face double barrel that evolved by gene duplication

    Robert Pejchal;Martha L Ludwig

  • The structure of the C-terminal domain of methionine synthase: presenting S-adenosylmethionine for reductive methylation of B12

    Melinda M Dixon;Sha Huang;Rowena G Matthews;Martha Ludwig

  • Crystal structure of the quorum-sensing protein LuxS reveals a catalytic metal site

    Mark T. Hilgers;Martha L. Ludwig

Frequent Co-Authors

Rowena G. Matthews
Rowena G. Matthews University of Michigan–Ann Arbor
David P. Ballou
David P. Ballou University of Michigan–Ann Arbor
James A. Fee
James A. Fee Scripps Research Institute
Myoung Soo Lah
Myoung Soo Lah Ulsan National Institute of Science and Technology
Christian Weber
Christian Weber Ludwig-Maximilians-Universität München
Vincent Massey
Vincent Massey University of Michigan–Ann Arbor
Charles H. Williams
Charles H. Williams University of Michigan–Ann Arbor
James E. Penner-Hahn
James E. Penner-Hahn University of Michigan–Ann Arbor
Katja Becker
Katja Becker University of Giessen

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a degree in Chemistry often opens doors to various related fields that blend science with practical applications. For those interested in expanding their career options, exploring degrees like criminal justice or paralegal studies online can be beneficial. Understanding how much is criminal justice school is essential for planning your educational budget if you choose to diversify your skill set with such programs.

Many students opt for an accredited online criminal justice associate degree to gain foundational knowledge and increase employability. This degree can complement Chemistry by preparing graduates for roles in regulatory compliance or forensic sciences.

Career pathways like paralegal work also intersect with scientific knowledge, especially in intellectual property or environmental law. Research into what types of paralegals make the most money can guide students toward specialized roles that offer higher returns.

For Chemistry graduates interested in industry roles, positions such as pharmaceutical sales reps offer attractive salaries and dynamic career paths. Learning about pharma sales rep salary and progression opportunities can help inform career decisions post-graduation.

Best Scientists Citing Martha L. Ludwig

Recently Published Articles