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Microbiology
Portugal
2026

D-Index & Metrics

Microbiology

D-Index
68
Citations
12590
World Ranking
2214
National Ranking
6

Leonard Amaral publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Leonard Amaral sits on this spectrum.

55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55 publications 679+

This scientist: 264 publications — 69th percentile

69% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

Leonard Amaral D-index placement in Microbiology in 2026

The chart shows the D-index (discipline H-index) distribution of Microbiology scientists ranked by Research.com in 2026. The highlighted bar marks where Leonard Amaral sits on this spectrum.

40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 68 D-Index — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Microbiology in Portugal Leader Award
  • 2022 - Research.com Microbiology in Portugal Leader Award

Overview

Leonard Amaral is affiliated with Universidade Nova de Lisboa in Portugal. Their research spans several fields within the social sciences, with a particular focus on law and education. The scientist's interdisciplinary approach also touches on microbiology, information systems and management, and epidemiology.

The main fields of study represented in their publications include:

  • Social Sciences

Within these fields, Amaral's subfields are diverse, comprising:

  • Law
  • Education
  • Microbiology
  • Information Systems and Management
  • Epidemiology

Their research topics reveal a focus on issues relevant to Brazilian society and public health, including:

  • Brazilian Legal Issues
  • Academic Research in Diverse Fields
  • Business and Management Studies
  • Reproductive tract infections research
  • Microbial infections and disease research
  • Herpesvirus Infections and Treatments
  • Public Health in Brazil

Recent publications by Leonard Amaral demonstrate engagement with both legal and educational themes. Notable papers include:

  • "ARRENDAMENTO MERCANTIL COMO INSTRUMENTO DE PLANEJAMENTO TRIBUTÁRIO PARA O ARRENDATÁRIO NO BRASIL," published in 2024 in Revista Ibero-Americana de Humanidades, Ciências e Educação
  • "CRIMINALIZAÇÃO DO INADIMPLEMENTO DO ICMS," published in 2024 in Revista Ibero-Americana de Humanidades, Ciências e Educação
  • "RECONHECIMENTO DE UNIÃO ESTÁVEL POST MORTEM: PERSPECTIVAS LEGAIS E DESAFIOS PRÁTICOS," published in 2024 in Revista Ibero-Americana de Humanidades, Ciências e Educação
  • "TECNOLOGIAS NA SALA DE AULA," published in 2025 in Revista Ibero-Americana de Humanidades, Ciências e Educação
  • "LETRAMENTO DIGITAL E MULTILETRAMENTO," published in 2025 in Revista Ibero-Americana de Humanidades, Ciências e Educação

Amaral often collaborates with a group of recurring co-authors, including:

  • Valdenir Bandeira Gomes Júnior
  • Liliana Rodrigues
  • F. Leitão
  • Wanessa Rezende Silva
  • Eric Thomas Paiva Magalhães

The Revista Ibero-Americana de Humanidades, Ciências e Educação stands out as the primary venue for their work. Other publication venues include:

  • Venereology
  • Derecho y cambio social.

Best Publications

  • Multidrug Efflux Pumps in Staphylococcus aureus: an Update

    Sofia Santos Costa;Miguel Viveiros;Leonard Amaral;Isabel Couto

  • Mechanisms of drug efflux and strategies to combat them: Challenging the efflux pump of Gram-negative bacteria

    Jean-Marie Pagès;Leonard Amaral

  • Geraniol Restores Antibiotic Activities against Multidrug-Resistant Isolates from Gram-Negative Species

    Vannina Lorenzi;Alain Muselli;Antoine François Bernardini;Liliane Berti

  • Antibiotic stress, genetic response and altered permeability of E. coli.

    Miguel Viveiros;Myrielle Dupont;Liliana Rodrigues;Isabel Couto

  • Contribution of Efflux to the Emergence of Isoniazid and Multidrug Resistance in Mycobacterium tuberculosis

    Diana Machado;Isabel Couto;João Perdigão;Liliana Rodrigues

  • Clinical Concentrations of Thioridazine Kill Intracellular Multidrug-Resistant Mycobacterium tuberculosis

    Diane Ordway;Miguel Viveiros;Clara Leandro;Rosário Bettencourt

  • The potential management of resistant infections with non-antibiotics.

    Jette Elisabeth Kristiansen;Leonard Amaral

  • Fluorometric determination of ethidium bromide efflux kinetics in Escherichia coli

    Laura Paixão;Liliana Rodrigues;Isabel Couto;Marta Martins

  • Potential role of non-antibiotics (helper compounds) in the treatment of multidrug-resistant Gram-negative infections: mechanisms for their direct and indirect activities.

    Marta Martins;Sujata G. Dastidar;Seamus Fanning;Jette E. Kristiansen

  • Activity of phenothiazines against antibiotic-resistant Mycobacterium tuberculosis: a review supporting further studies that may elucidate the potential use of thioridazine as anti-tuberculosis therapy

    Leonard Amaral;Jette E. Kristiansen;Miguel Viveiros;Jorge Atouguia

  • New Roads Leading to Old Destinations: Efflux Pumps as Targets to Reverse Multidrug Resistance in Bacteria

    Gabriella Spengler;Annamária Kincses;Márió Gajdács;Leonard Amaral;Leonard Amaral

  • Demonstration of intrinsic efflux activity of Escherichia coli K-12 AG100 by an automated ethidium bromide method

    Miguel Viveiros;Ana Martins;Laura Paixão;Liliana Rodrigues

  • Inhibition of the respiration of multi-drug resistant clinical isolates of Mycobacterium tuberculosis by thioridazine: potential use for initial therapy of freshly diagnosed tuberculosis

    L. Amaral;J. E. Kristiansen;L. S. Abebe;W. Millett

  • Efflux-mediated response of Staphylococcus aureus exposed to ethidium bromide

    Isabel Couto;Sofia Santos Costa;Miguel Viveiros;Marta Martins

  • Efflux pumps of Gram-negative bacteria: what they do, how they do it, with what and how to deal with them

    Leonard Amaral;Ana Martins;Gabriella Spengler;Joseph Molnar

  • Inhibition of quorum-sensing signals by essential oils

    Mira Ágnes Szabó;Gábor Zoltán Varga;Judit Hohmann;Zsuzsanna Schelz

  • Enhancement of antibiotic activity against poly-drug resistant Mycobacterium tuberculosis by phenothiazines.

    Miguel Viveiros;Leonard Amaral

  • Antimicrobial Activity of Phenothiazines

    Leonard Amaral;Miguel Viveiros;Joseph Molnar

  • Contribution of efflux activity to isoniazid resistance in the Mycobacterium tuberculosis complex.

    Liliana Rodrigues;Diana Machado;Isabel Couto;Leonard Amaral

  • Inducement and Reversal of Tetracycline Resistance in Escherichia coli K-12 and Expression of Proton Gradient-Dependent Multidrug Efflux Pump Genes

    Miguel Viveiros;Ana R. Jesus;Mafalda Brito;Clara Leandro

  • Enhanced killing of intracellular multidrug-resistant Mycobacterium tuberculosis by compounds that affect the activity of efflux pumps

    Leonard Amaral;Marta Martins;Miguel Viveiros

Frequent Co-Authors

Miguel Viveiros
Miguel Viveiros Universidade Nova de Lisboa
Isabel Couto
Isabel Couto Universidade Nova de Lisboa
Joseph Molnár
Joseph Molnár University of Szeged
Marta Martins
Marta Martins Trinity College Dublin
Séamus Fanning
Séamus Fanning University College Dublin
Diane J. Ordway
Diane J. Ordway Colorado State University
José Melo-Cristino
José Melo-Cristino University of Lisbon
Jean-Marie Pagès
Jean-Marie Pagès Aix-Marseille University
Dick van Soolingen
Dick van Soolingen National Institute for Public Health and the Environment
Hazel M. Dockrell
Hazel M. Dockrell London School of Hygiene & Tropical Medicine

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