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

Thomas P.A. Devasagayam

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 50 14242 12822 256 253 92 11840
Biology and Biochemistry 49 17890 16417 85 83 95 11696

Thomas P.A. Devasagayam publications per year

The chart shows the history of publications by Thomas P.A. Devasagayam between 1979 and 2017, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Thomas P.A. Devasagayam published across 39 years, from 1979 to 2017, averaging 2.6 papers a year. Output peaked at 9 publications in 2000. 1 of the 101 publications appeared in the last two years.

No. of publications
2 4 6 8
Bar chart. Horizontal axis: year, 1979 to 2017. Vertical axis: number of publications, 0 to 9. Peak 9 publications in 2000. 1979: 1 publication 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 2 publications 1984: 0 publications 1985: 0 publications 1986: 6 publications 1987: 1 publication 1988: 0 publications 1989: 1 publication 1990: 1 publication 1991: 2 publications 1992: 0 publications 1993: 1 publication 1994: 2 publications 1995: 2 publications 1996: 3 publications 1997: 8 publications 1998: 3 publications 1999: 5 publications 2000: 9 publications 2001: 2 publications 2002: 1 publication 2003: 0 publications 2004: 4 publications 2005: 4 publications 2006: 7 publications 2007: 6 publications 2008: 5 publications 2009: 6 publications 2010: 6 publications 2011: 5 publications 2012: 3 publications 2013: 2 publications 2014: 1 publication 2015: 1 publication 2016: 0 publications 2017: 1 publication
1979 2017

101 publications in total across all disciplines

View publications per year as a table
Thomas P.A. Devasagayam: publications per year, 1979 to 2017
Year Publications
1979 1
1980 0
1981 0
1982 0
1983 2
1984 0
1985 0
1986 6
1987 1
1988 0
1989 1
1990 1
1991 2
1992 0
1993 1
1994 2
1995 2
1996 3
1997 8
1998 3
1999 5
2000 9
2001 2
2002 1
2003 0
2004 4
2005 4
2006 7
2007 6
2008 5
2009 6
2010 6
2011 5
2012 3
2013 2
2014 1
2015 1
2016 0
2017 1
Total 101
Download as CSV

Thomas P.A. Devasagayam publications per year - data summary

  • Thomas P.A. Devasagayam, a Chemistry scholar from Bhabha Atomic Research Centre, has 101 publications recorded across 39 years, from 1979 to 2017.
  • The oldest publication on record dates to 1979 and the most recent to 2017.
  • The most productive year is 2000, with 9 publications.
  • The least productive years with any output are 1979, 1987, 1989, 1990 and others, with 1 publication each.
  • 9 of the 39 years in the span carry no publications at all (1980, 1981, 1982, 1984 and others).
  • The rate of publication averages 2.6 papers per year over the whole span, or 3.4 per year counting only the 30 years with at least one publication.
  • The last 5 years on the chart (2013-2017) hold 5 publications, 5% of the career total.
  • Split into equal eras - 1979-1991: 14 publications (1.1 per year); 1992-2004: 40 publications (3.1 per year); 2005-2017: 47 publications (3.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

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.

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, 81–100 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: 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.

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 92
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
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

Thomas P.A. Devasagayam publication distribution in Chemistry in 2026 - data summary

  • The chart plots the publication count of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 63 ranges running from 61–80 to 1,295+ publications.
  • Thomas P.A. Devasagayam, a Chemistry scholar from Bhabha Atomic Research Centre, records 92 publications - the 1st percentile of the discipline.
  • 1% of ranked Chemistry scientists score the same or lower than Thomas P.A. Devasagayam, and about 99% score higher.
  • The median of the discipline falls in the 241–260 publications range, and Thomas P.A. Devasagayam ranks below the median.
  • The most crowded range is 161–180 publications, holding 1,350 scientists (8% of the field).
  • 77% of the field sits in the lowest quarter of the value range (up to 361–380 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,295 publications or more, 100 scientists in all (<1% of the field).

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.

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, 50–51 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: 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.

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 50
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
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

Thomas P.A. Devasagayam D-index placement in Chemistry in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 61 ranges running from 40–41 to 159+ D-Index.
  • Thomas P.A. Devasagayam, a Chemistry scholar from Bhabha Atomic Research Centre, records 50 D-Index - the 21st percentile of the discipline.
  • 21% of ranked Chemistry scientists score the same or lower than Thomas P.A. Devasagayam, and about 79% score higher.
  • The median of the discipline falls in the 62–63 D-Index range, and Thomas P.A. Devasagayam ranks below the median.
  • The most crowded range is 56–57 D-Index, holding 1,051 scientists (6% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 70–71 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 159 D-Index or more, 98 scientists in all (<1% of the field).

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

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

For students interested in Chemistry, exploring related fields such as forensic science and criminal justice can open diverse career pathways. Many universities now offer flexible options, including the best online colleges for forensic science. These programs blend fundamental chemical knowledge with practical skills needed in crime labs and legal settings.

To advance further, one can consider an online master's in forensic psychology, which pairs well with a Chemistry background. This degree enhances understanding of human behavior in forensic investigations, adding valuable expertise for complex cases.

Career opportunities in forensics are promising, with many high paying jobs in forensics available to qualified individuals. Roles range from forensic chemists to crime analysts, all requiring a strong foundation in scientific principles and analytical thinking.

When considering education paths, it’s important to evaluate costs and program value. For those interested in legal aspects, researching criminal justice degree online cost helps in making informed decisions about budget and schooling options.

Best Scientists Citing Thomas P.A. Devasagayam

Trending Scientists

Recently Published Articles