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Microbiology
Portugal
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 68 2214 2022 6 6 264 12590

Leonard Amaral publications per year

The chart shows the history of publications by Leonard Amaral between 1969 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Leonard Amaral published across 57 years, from 1969 to 2025, averaging 5.2 papers a year. Output peaked at 31 publications in 2012. 11 of the 299 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1969 to 2025. Vertical axis: number of publications, 0 to 31. Peak 31 publications in 2012. 1969: 2 publications 1970: 3 publications 1971: 4 publications 1972: 1 publication 1973: 3 publications 1974: 4 publications 1975: 2 publications 1976: 4 publications 1977: 0 publications 1978: 0 publications 1979: 1 publication 1980: 3 publications 1981: 5 publications 1982: 3 publications 1983: 1 publication 1984: 1 publication 1985: 1 publication 1986: 2 publications 1987: 0 publications 1988: 0 publications 1989: 2 publications 1990: 1 publication 1991: 2 publications 1992: 3 publications 1993: 0 publications 1994: 1 publication 1995: 1 publication 1996: 1 publication 1997: 1 publication 1998: 0 publications 1999: 0 publications 2000: 5 publications 2001: 5 publications 2002: 3 publications 2003: 8 publications 2004: 6 publications 2005: 11 publications 2006: 6 publications 2007: 11 publications 2008: 14 publications 2009: 24 publications 2010: 24 publications 2011: 30 publications 2012: 31 publications 2013: 26 publications 2014: 12 publications 2015: 8 publications 2016: 7 publications 2017: 3 publications 2018: 0 publications 2019: 1 publication 2020: 1 publication 2021: 0 publications 2022: 0 publications 2023: 0 publications 2024: 5 publications 2025: 6 publications
1969 2025

299 publications in total across all disciplines

View publications per year as a table
Leonard Amaral: publications per year, 1969 to 2025
Year Publications
1969 2
1970 3
1971 4
1972 1
1973 3
1974 4
1975 2
1976 4
1977 0
1978 0
1979 1
1980 3
1981 5
1982 3
1983 1
1984 1
1985 1
1986 2
1987 0
1988 0
1989 2
1990 1
1991 2
1992 3
1993 0
1994 1
1995 1
1996 1
1997 1
1998 0
1999 0
2000 5
2001 5
2002 3
2003 8
2004 6
2005 11
2006 6
2007 11
2008 14
2009 24
2010 24
2011 30
2012 31
2013 26
2014 12
2015 8
2016 7
2017 3
2018 0
2019 1
2020 1
2021 0
2022 0
2023 0
2024 5
2025 6
Total 299
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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.

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 255–264 publications, is where this scientist sits. 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
55–64 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.

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234
205–214 208
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146 264
265–274 139
275–284 148
285–294 115
295–304 96
305–314 88
315–324 106
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
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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.

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 68 D-Index, is where this scientist sits. 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.

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151
60 139
61 123
62 126
63 144
64 109
65 103
66 124
67 112
68 103 68
69 131
70 94
71 93
72 96
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34
92 27
93 26
94 33
95 22
96 37
97 22
98 21
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
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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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