World's Best Scientists 2026 revealed!
Thomas P.A. Devasagayam

Thomas P.A. Devasagayam

D-Index & Metrics

Chemistry

D-Index
50
Citations
11840
World Ranking
14242
National Ranking
256

Biology and Biochemistry

D-Index
49
Citations
11696
World Ranking
17890
National Ranking
85

Thomas P.A. Devasagayam 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 Thomas P.A. Devasagayam 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: 92 publications — 1st percentile

1% of scientists in this discipline score the same or lower.

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

Thomas P.A. Devasagayam 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 Thomas P.A. Devasagayam 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: 50 D-Index — 21st percentile

21% of scientists in this discipline score the same or lower.

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

Overview

What is he best known for?

The fields of study he is best known for:

  • Enzyme
  • Biochemistry
  • Antioxidant

His primary areas of investigation include Antioxidant, Lipid peroxidation, Biochemistry, Glutathione and Ascorbic acid. His studies examine the connections between Antioxidant and genetics, as well as such issues in Food science, with regards to Wheatgrass Juice, Botany and Trolox. His Lipid peroxidation research integrates issues from Microsome and Mitochondrion.

His study in Protein oxidation, TBARS, ABTS, Vitamin E and Flavonoid falls under the purview of Biochemistry. His work deals with themes such as Reactive oxygen species and Superoxide dismutase, which intersect with Glutathione. His Reactive oxygen species course of study focuses on Hydroxyl radical and Caffeine and Xanthine.

His most cited work include:

  • Free radicals and antioxidants in human health: current status and future prospects. (1148 citations)
  • Indian Herbs and Herbal Drugs Used for the Treatment of Diabetes (514 citations)
  • Caffeine as an antioxidant: inhibition of lipid peroxidation induced by reactive oxygen species. (240 citations)

What are the main themes of his work throughout his whole career to date?

His scientific interests lie mostly in Biochemistry, Lipid peroxidation, Antioxidant, Reactive oxygen species and Ascorbic acid. He works mostly in the field of Biochemistry, limiting it down to topics relating to Singlet oxygen and, in certain cases, Porphyrin and Sodium azide. His research integrates issues of Microsome, Glutathione and Mitochondrion in his study of Lipid peroxidation.

As a part of the same scientific family, Thomas P.A. Devasagayam mostly works in the field of Microsome, focusing on Internal medicine and, on occasion, Phospholipid. In Antioxidant, Thomas P.A. Devasagayam works on issues like Food science, which are connected to Ethyl acetate. His work in the fields of Reactive oxygen species, such as Reactive nitrogen species, overlaps with other areas such as Chlorophyllin.

He most often published in these fields:

  • Biochemistry (66.67%)
  • Lipid peroxidation (52.08%)
  • Antioxidant (46.88%)

What were the highlights of his more recent work (between 2007-2017)?

  • Biochemistry (66.67%)
  • Antioxidant (46.88%)
  • Lipid peroxidation (52.08%)

In recent papers he was focusing on the following fields of study:

Thomas P.A. Devasagayam spends much of his time researching Biochemistry, Antioxidant, Lipid peroxidation, ABTS and Oxidative stress. His Biochemistry study incorporates themes from Toxicity, Molecular biology and Pharmacology. His biological study spans a wide range of topics, including Reactive oxygen species, Ferulic acid and Aminothiazole.

His research in Reactive oxygen species focuses on subjects like Radical, which are connected to Mushroom. Thomas P.A. Devasagayam has researched Lipid peroxidation in several fields, including Phenols and Hydroxyl radical. The Oxidative stress study combines topics in areas such as Geraniin and Kinase, Kinase activity, Cell biology.

Between 2007 and 2017, his most popular works were:

  • Antioxidant and prooxidant nature of hydroxycinnamic acid derivatives ferulic and caffeic acids. (206 citations)
  • Anticancer property of gallic acid in A549, a human lung adenocarcinoma cell line, and possible mechanisms. (87 citations)
  • Antioxidant activity and toxicity profile of total triterpenes isolated from Ganoderma lucidum (Fr.) P. Karst occurring in South India. (64 citations)

In his most recent research, the most cited papers focused on:

  • Enzyme
  • Biochemistry
  • Antioxidant

Thomas P.A. Devasagayam mainly focuses on Biochemistry, Antioxidant, Lipid peroxidation, ABTS and Geraniin. Apoptosis, Cell and Cell growth are the subjects of his Biochemistry studies. Within one scientific family, Thomas P.A. Devasagayam focuses on topics pertaining to Toxicity under Lipid peroxidation, and may sometimes address concerns connected to Terpene.

His research investigates the connection between ABTS and topics such as Phenols that intersect with issues in Oxygen radical absorbance capacity, Radiation Induced DNA Damage, Saccharum officinarum, Phenolic acid and Hydroxycinnamic acid. His Geraniin research includes themes of Oxidative stress, Rutin, Quercetin and Polyphenol. His Protein oxidation research is multidisciplinary, relying on both Free radical scavenger, Trolox, Hydroxyl radical and Aminothiazole.

Best Publications

  • Free radicals and antioxidants in human health: current status and future prospects.

    T P A Devasagayam;J C Tilak;K K Boloor;Ketaki S Sane

  • Indian Herbs and Herbal Drugs Used for the Treatment of Diabetes

    Manisha Modak;Priyanjali Dixit;Jayant Londhe;Saroj Ghaskadbi

  • Caffeine as an antioxidant: inhibition of lipid peroxidation induced by reactive oxygen species.

    T.P.A. Devasagayam;J.P. Kamat;Hari Mohan;P.C. Kesavan

  • Decreased lipid peroxidation in the rat kidney during gestation

    Thomas P.A. Devasagayam;U. Tarachand

  • Formation of 8-hydroxy(deoxy)guanosine and generation of strand breaks at guanine residues in DNA by singlet oxygen

    Thomas P. A. Devasagayam;Steen Steenken;Maik S. W. Obendorf;Wolfgang A. Schulz

  • Carotenoids, tocopherols and thiols as biological singlet molecular oxygen quenchers.

    P. di Mascio;T. P. A. Devasagayam;S. Kaiser;H. Sies

  • Antioxidant and prooxidant nature of hydroxycinnamic acid derivatives ferulic and caffeic acids.

    Dharmendra Kumar Maurya;Thomas Paul Asir Devasagayam

  • Reactive oxygen species mediated membrane damage induced by fullerene derivatives and its possible biological implications.

    J.P. Kamat;T.P.A. Devasagayam;K.I. Priyadarsini;H. Mohan

  • Current Status of Herbal Drugs in India: An Overview

    Ashok D.B. Vaidya;Thomas P.A. Devasagayam

  • Antioxidant properties of Asparagus racemosus against damage induced by γ-radiation in rat liver mitochondria

    Jayashree P Kamat;Krutin K Boloor;Thomas P.A Devasagayam;S.R Venkatachalam

  • Antioxidant properties of germinated fenugreek seeds

    Priyanjali Dixit;Saroj Ghaskadbi;Hari Mohan;Thomas P. A. Devasagayam

  • Evaluation of the antioxidant activity of wheatgrass (Triticum aestivum L.) as a function of growth under different conditions

    Sunil D. Kulkarni;Jai. C. Tilak;R. Acharya;Nilima S. Rajurkar

  • Antioxidant properties of Plumbago zeylanica, an Indian medicinal plant and its active ingredient, plumbagin.

    Jai C. Tilak;Soumyakanti Adhikari;Thomas P.A. Devasagayam

  • Tocotrienols from palm oil as potent inhibitors of lipid peroxidation and protein oxidation in rat brain mitochondria

    J.P. Kamat;T.P.A. Devasagayam

  • Chlorophyllin as an effective antioxidant against membrane damage in vitro and ex vivo.

    Jayashree P Kamat;Krutin K Boloor;Thomas P.A Devasagayam

  • Tocotrienols from palm oil as effective inhibitors of protein oxidation and lipid peroxidation in rat liver microsomes.

    J.P. Kamat;H.D. Sarma;T.P.A. Devasagayam;K. Nesaretnam

  • Some novel approaches for radioprotection and the beneficial effect of natural products.

    Dharmendra K. Maurya;Thomas P. A. Devasagayam;Cherupally Krishnan K. Nair

  • Anticancer property of gallic acid in A549, a human lung adenocarcinoma cell line, and possible mechanisms.

    Dharmendra K. Maurya;Nivedita Nandakumar;Thomas Paul Asir Devasagayam

  • Lipid peroxidation in rat uterus.

    Thomas P.A. Devasagayam

  • Antioxidant availability of turmeric in relation to its medicinal and culinary uses

    Jai C. Tilak;Meenal Banerjee;Hari Mohan;T. P. A. Devasagayam

Frequent Co-Authors

Bharat Bhushan
Bharat Bhushan The Ohio State University
Vishwas A. Bapat
Vishwas A. Bapat Shivaji University
Penna Suprasanna
Penna Suprasanna Amity University
Gerald Wolf
Gerald Wolf Otto-von-Guericke University Magdeburg
Yuji Naito
Yuji Naito Kyoto Prefectural University of Medicine
Toshikazu Yoshikawa
Toshikazu Yoshikawa Kyoto Prefectural University of Medicine

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