World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
120
Citations
51630
World Ranking
127
National Ranking
58

Larry L. Needham publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Larry L. Needham sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 407 publications — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Larry L. Needham D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Larry L. Needham sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 120 D-Index — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Best Publications

  • Exposure of the U.S. population to bisphenol A and 4-tertiary-octylphenol: 2003-2004

    Antonia M. Calafat;Xiaoyun Ye;Lee-Yang Wong;John A. Reidy

  • Polyfluoroalkyl chemicals in the U.S. population: data from the National Health and Nutrition Examination Survey (NHANES) 2003-2004 and comparisons with NHANES 1999-2000.

    Antonia M. Calafat;Lee-Yang Wong;Zsuzsanna Kuklenyik;John A. Reidy

  • Urinary concentrations of bisphenol A and 4-nonylphenol in a human reference population.

    Antonia M. Calafat;Zsuzsanna Kuklenyik;John A. Reidy;Samuel P. Caudill

  • Urinary levels of seven phthalate metabolites in the U.S. population from the National Health and Nutrition Examination Survey (NHANES) 1999-2000.

    Manori J Silva;Dana B Barr;John A Reidy;Nicole A Malek

  • Chlorinated hydrocarbon levels in human serum: effects of fasting and feeding.

    DL Phillips;JL Pirkle;VW Burse;Jr Jt Bernert

  • Effects of Prenatal and Postnatal Methylmercury Exposure From Fish Consumption on Neurodevelopment Outcomes at 66 Months of Age in the Seychelles Child Development Study

    Philip W. Davidson;Gary J. Myers;Christopher Cox;Catherine Axtell

  • PRENATAL EXPOSURE TO PBDES AND NEURODEVELOPMENT

    Julie B. Herbstman;Andreas Sjödin;Matthew Kurzon;Sally A. Lederman

  • Cord serum concentrations of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in relation to weight and size at birth.

    Benjamin J. Apelberg;Frank R. Witter;Julie B. Herbstman;Antonia M. Calafat

  • Urinary Concentrations of Triclosan in the U.S. Population: 2003–2004

    Antonia M. Calafat;Xiaoyun Ye;Lee-Yang Wong;John A. Reidy

  • Serum Concentrations of 11 Polyfluoroalkyl Compounds in the U.S. Population: Data from the National Health and Nutrition Examination Survey (NHANES) 1999−2000

    Antonia M. Calafat;Zsuzsanna Kuklenyik;John A. Reidy;Samuel P. Caudill

  • Automated on-line column-switching HPLC-MS/MS method with peak focusing for the determination of nine environmental phenols in urine.

    Xiaoyun Ye;Zsuzsanna Kuklenyik;Larry L Needham;Antonia M Calafat

  • Quantification of 22 phthalate metabolites in human urine

    Manori J. Silva;Ella Samandar;James L. Preau;John A. Reidy

  • Urinary Concentrations of Four Parabens in the U.S. Population: NHANES 2005–2006

    Antonia M. Calafat;Xiaoyun Ye;Lee-Yang Wong;Amber M. Bishop

  • Partition of Environmental Chemicals between Maternal and Fetal Blood and Tissues

    Larry L. Needham;Philippe Grandjean;Birger Heinzow;Poul J. Jørgensen

  • Low Dose Organochlorine Pesticides and Polychlorinated Biphenyls Predict Obesity, Dyslipidemia, and Insulin Resistance among People Free of Diabetes

    Duk Hee Lee;Michael W. Steffes;Andreas Sjödin;Richard S. Jones

  • Serum Concentrations of Polybrominated Diphenyl Ethers (PBDEs) and Polybrominated Biphenyl (PBB) in the United States Population: 2003-2004

    Andreas Sjödin;Lee Yang Wong;Richard S. Jones;Annie Park

  • Quantitative detection of eight phthalate metabolites in human urine using HPLC-APCI-MS/MS.

    B C Blount;K E Milgram;M J Silva;N A Malek

  • Exposure to Phthalates and Breast Cancer Risk in Northern Mexico

    Lizbeth López-Carrillo;Raúl U. Hernández-Ramírez;Antonia M. Calafat;Luisa Torres-Sánchez

  • Neurobehavioral deficits associated with PCB in 7-year-old children prenatally exposed to seafood neurotoxicants.

    Philippe Grandjean;Pal Weihe;Virlyn W. Burse;Larry L. Needham

  • Detection of phthalate metabolites in human amniotic fluid.

    M. J. Silva;J. A. Reidy;A. R. Herbert;J. L. Preau

Frequent Co-Authors

Donald G. Patterson
Donald G. Patterson Centers for Disease Control and Prevention
Brenda Eskenazi
Brenda Eskenazi University of California, Berkeley
Paolo Brambilla
Paolo Brambilla University of Milan
Donald L. Phillips
Donald L. Phillips Environmental Protection Agency
Antonia M. Calafat
Antonia M. Calafat Centers for Disease Control and Prevention
David L. Ashley
David L. Ashley Georgia State University

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Related Online Degrees & Career Pathways

Pursuing a degree in Environmental Sciences opens doors to diverse career paths, and many students now turn to flexible online programs to advance their education. For those looking to deepen their expertise, exploring eds to edd programs can be a valuable step, especially for roles in environmental education and leadership.

For professionals interested in combining social impact with environmental issues, earning an advanced degree through online dsw programs in social work offers an affordable way to address community and sustainability challenges hand-in-hand.

Students uncertain about their specific focus or those seeking foundational knowledge might find an online general studies degree affordable and adaptable, providing a broad base that supports further specialization in environmental topics.

Lastly, those beginning their academic journey can consider some of the easiest bachelor degree programs available online to build confidence and credits before transitioning to more specialized Environmental Sciences courses.

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