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D-Index & Metrics

Biology and Biochemistry

D-Index
65
Citations
14287
World Ranking
9200
National Ranking
4076

Hamid M. Said publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Hamid M. Said sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 413 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 848 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 949 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 840 scientists 207–216 publications: 733 scientists 217–226 publications: 708 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 417 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 196 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 59 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 383 publications — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Hamid M. Said D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Hamid M. Said sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 316 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 899 scientists 52–53 D-Index: 1,025 scientists 54–55 D-Index: 1,149 scientists 56–57 D-Index: 1,235 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,162 scientists 62–63 D-Index: 1,130 scientists 64–65 D-Index: 1,031 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 714 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 71 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 65 D-Index — 55th percentile

55% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Hamid M. Said is affiliated with the University of California, Irvine in the United States. Their research primarily spans the fields of Medicine and Biochemistry, Genetics and Molecular Biology, with a substantive focus on several subfields including Neurology, Physiology, Nutrition and Dietetics, Clinical Biochemistry, and Rheumatology.

The scientist's work covers a range of topics, notably:

  • Alcoholism and Thiamine Deficiency
  • Diet and metabolism studies
  • Metabolism and Genetic Disorders
  • Folate and B Vitamins Research
  • Biotin and Related Studies
  • Vitamin C and Antioxidants Research
  • Escherichia coli research studies

Hamid M. Said has contributed to several research articles in various reputable scientific journals. Some of their recent publications include:

  • Enterotoxigenic Escherichia coli heat-labile toxin drives enteropathic changes in small intestinal epithelia (2022), published in Nature Communications
  • pH-dependent pyridoxine transport by SLC19A2 and SLC19A3: Implications for absorption in acidic microclimates (2020), published in Journal of Biological Chemistry
  • Biotin Deficiency Induces Intestinal Dysbiosis Associated with an Inflammatory Bowel Disease-like Phenotype (2023), published in Nutrients
  • Alzheimer's disease is associated with disruption in thiamin transport physiology: A potential role for neuroinflammation (2022), published in Neurobiology of Disease
  • Hypoxia inhibits colonic uptake of the microbiota-generated forms of vitamin B1 via HIF-1α-mediated transcriptional regulation of their transporters (2022), published in Journal of Biological Chemistry

The frequent coauthors collaborating with Hamid M. Said include:

  • Subrata Sabui
  • Kalidas Ramamoorthy
  • James M. Fleckenstein
  • Anthonymuthu Selvaraj
  • Alaullah Sheikh

Regarding publication venues, Said has multiple works appearing in the following journals:

  • American Journal of Physiology-Gastrointestinal and Liver Physiology
  • American Journal of Physiology-Cell Physiology
  • Gastroenterology
  • Physiology
  • Journal of Biological Chemistry

Best Publications

  • TNF-α-induced increase in intestinal epithelial tight junction permeability requires NF-κB activation

    Thomas Y. Ma;Gary K. Iwamoto;Neil T. Hoa;Vimesh Akotia

  • Lipopolysaccharide Causes an Increase in Intestinal Tight Junction Permeability in Vitro and in Vivo by Inducing Enterocyte Membrane Expression and Localization of TLR-4 and CD14

    Shuhong Guo;Rana Al-Sadi;Rana Al-Sadi;Hamid M. Said;Thomas Y. Ma;Thomas Y. Ma

  • Mechanism of TNF-α modulation of Caco-2 intestinal epithelial tight junction barrier: role of myosin light-chain kinase protein expression

    Thomas Y. Ma;Michel A. Boivin;Dongmei Ye;Ali Pedram

  • Intestinal absorption of water-soluble vitamins in health and disease

    Hamid M. Said

  • IL-1β-Induced Increase in Intestinal Epithelial Tight Junction Permeability Is Mediated by MEKK-1 Activation of Canonical NF-κB Pathway

    Rana Al-Sadi;Dongmei Ye;Hamid M. Said;Thomas Y. Ma

  • Recent Advances in Carrier-Mediated Intestinal Absorption of Water-Soluble Vitamins

    Hamid M. Said

  • Intestinal absorption of water-soluble vitamins: an update.

    Hamid M Said;Zainab M Mohammed

  • Adaptive regulation of intestinal folate uptake: effect of dietary folate deficiency.

    Hamid M. Said;Nabendu Chatterjee;Riaz Ul Haq;Veedamali S. Subramanian

  • Mechanism of IL-1β Modulation of Intestinal Epithelial Barrier Involves p38 Kinase and Activating Transcription Factor-2 Activation

    Rana Al-Sadi;Shuhong Guo;Dongmei Ye;Karol Dokladny

  • Folate transport by human intestinal brush-border membrane vesicles

    H. M. Said;F. K. Ghishan;Reyadh Redha

  • Expression and functional contribution of hTHTR-2 in thiamin absorption in human intestine

    Hamid M. Said;Krishnaswamy Balamurugan;Krishnaswamy Balamurugan;Veedamali S. Subramanian;Veedamali S. Subramanian;Jonathan S. Marchant

  • Biotin uptake by human colonic epithelial NCM460 cells: a carrier-mediated process shared with pantothenic acid.

    Hamid M. Said;Alvaro Ortiz;Alvaro Ortiz;Eric McCloud;Eric McCloud;David Dyer;David Dyer

  • Effect of folate oversupplementation on folate uptake by human intestinal and renal epithelial cells

    Balasubramaniem Ashokkumar;Zainab M Mohammed;Nosratola D Vaziri;Hamid M Said

  • Human intestinal folate transport: Cloning, expression, and distribution of complementary RNA

    Toai T. Nguyen;David L. Dyer;Daniel D. Dunning;Stanley A. Rubin

  • Intestinal transport of zinc and folic acid: a mutual inhibitory effect

    F K Ghishan;H M Said;P C Wilson;J E Murrell

  • Biotin uptake by human intestinal and liver epithelial cells: role of the SMVT system

    Krishnaswamy Balamurugan;Alvaro Ortiz;Hamid M. Said

  • Cell and Molecular Aspects of Human Intestinal Biotin Absorption

    Hamid M. Said

  • Biotin transport in the human intestine: inhibition by anticonvulsant drugs.

    H M Said;R Redha;W Nylander

  • A carrier-mediated, Na+ gradient-dependent transport for biotin in human intestinal brush-border membrane vesicles

    H. M. Said;R. Redha;W. Nylander

  • Riboflavin uptake by human-derived colonic epithelial NCM460 cells.

    Hamid M. Said;Alvaro Ortiz;Mary Pat Moyer;Norimoto Yanagawa

Frequent Co-Authors

Thomas Y. Ma
Thomas Y. Ma Pennsylvania State University
Fayez K. Ghishan
Fayez K. Ghishan University of Arizona
Nosratola D. Vaziri
Nosratola D. Vaziri University of California, Irvine
Pradeep K. Dudeja
Pradeep K. Dudeja University of Illinois at Chicago
Ian Parker
Ian Parker University of California, Irvine
Michael D. Cahalan
Michael D. Cahalan University of California, Irvine
Ali Pedram
Ali Pedram University of California, Irvine
David E. Ong
David E. Ong Vanderbilt University Medical Center
Mary Pat Moyer
Mary Pat Moyer Incell Corporation (United States)
John Christodoulou
John Christodoulou University of Melbourne

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