University, Subject, Country, Region, World
Africa University 2.247 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Jan 30, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (873.690) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Haematology
Immunology
Blood Group Serology
Blood Transfusion Science
Public Health
Metrics
H-Index
i10 Index
Citation Counts
119
499
35,892
* Total H IndexRankings
Ranking Based On Selection: 2
corrosion
corrosion inhibition
corrosion of metals
adsorption
quantum chemical calculations
Metrics
H-Index
i10 Index
Citation Counts
109
471
40,098
* Total H IndexRankings
Ranking Based On Selection: 3
Macroeconomic Policy
Metrics
H-Index
i10 Index
Citation Counts
67
243
16,039
* Total H IndexRankings
Ranking Based On Selection: 4
Nanotechnology for Water Treatment
Membrane Technology
Water Treatment Technologies
Metrics
H-Index
i10 Index
Citation Counts
65
369
20,892
* Total H IndexRankings
Ranking Based On Selection: 5
Fractional Differential equations
Lie Symmetry
Bio-Mathematics
Metrics
H-Index
i10 Index
Citation Counts
59
215
12,449
* Total H IndexRankings
Ranking Based On Selection: 6
Wastewater treatment technologies
Bioreactors
Membrane technology
Water reuse
Microbial fuel
Metrics
H-Index
i10 Index
Citation Counts
55
167
16,073
* Total H IndexRankings
Ranking Based On Selection: 7
Career and Human Capacity Development
Metrics
H-Index
i10 Index
Citation Counts
51
146
10,400
* Total H IndexRankings
Ranking Based On Selection: 8
Analytical Chemistry
Aquatic Toxicology
Chromatography
Mass spectrometry
Food Chemistry
Metrics
H-Index
i10 Index
Citation Counts
49
188
9,865
* Total H IndexRankings
Ranking Based On Selection: 9
Preservation
Records management
Knowledge management
Research methods
indigenous knowledge
Metrics
H-Index
i10 Index
Citation Counts
49
177
8,398
* Total H IndexRankings
Ranking Based On Selection: 10
Polymers
Organic chemistry
Coating
Corrosion
Nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
45
116
6,020
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* Total H IndexRankings
Ranking Based On Selection: 11
Catalysis
catalytic energy conversion
fuel cell technology
surface chemistry
Metrics
H-Index
i10 Index
Citation Counts
43
94
5,996
* Total H IndexRankings
Ranking Based On Selection: 12
Advanced oxidation processes
Nanomaterial synthesis
Heterogeneous catalysis
Water treatment
Metrics
H-Index
i10 Index
Citation Counts
41
106
5,208
* Total H IndexRankings
Ranking Based On Selection: 13
Energy Efficiency
Fischer Tropsch
Process Synthesis
Metrics
H-Index
i10 Index
Citation Counts
41
152
6,108
* Total H IndexRankings
Ranking Based On Selection: 14
educational technology
higher education
learning analytics
student success
Metrics
H-Index
i10 Index
Citation Counts
40
88
6,592
* Total H IndexRankings
Ranking Based On Selection: 15
Electrochemistry
Electrocatalysis
Energy Storage devices
Electrodeposition
Metrics
H-Index
i10 Index
Citation Counts
40
86
6,214
* Total H IndexRankings
Ranking Based On Selection: 16
Sol-Gel Technology
Nanomaterials
Ceramics and Water Treatment
Metrics
H-Index
i10 Index
Citation Counts
39
103
5,828
* Total H IndexRankings
Ranking Based On Selection: 17
Climate Change
Loss and Damage
Disaster Risk Reduction
SDGs
Coastal Resilience and Livelihoods
Metrics
H-Index
i10 Index
Citation Counts
38
116
5,807
* Total H IndexRankings
Ranking Based On Selection: 18
NanoScience and Nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
38
123
7,656
* Total H IndexRankings
Ranking Based On Selection: 19
Fischer-Tropsch
Reactor design
Process Engineering
Comminution
Metrics
H-Index
i10 Index
Citation Counts
38
140
5,642
* Total H IndexRankings
Ranking Based On Selection: 20
genomics
bioinformatics
genetics
plant breeding
plant pathogens
Metrics
H-Index
i10 Index
Citation Counts
37
61
9,162
* Total H IndexRankings
Ranking Based On Selection: 21
Natural Organic Matter
Urban Water Cycle
Nanotechnology for Water Treatment
Drinking Water Treatment
Membrane Science and Te
Metrics
H-Index
i10 Index
Citation Counts
35
89
3,750
* Total H IndexRankings
Ranking Based On Selection: 22
Artificial Intelligence
Industry 4.0/5.0
Control Engineering
Evolutionary Optimization
Chaos
Metrics
H-Index
i10 Index
Citation Counts
34
96
8,925
* Total H IndexRankings
Ranking Based On Selection: 23
Polymer Blends & Composites
Preparation and Characterization of Bio-based Polymer Composites
Green Synthesis of Nanomaterial's
Metrics
H-Index
i10 Index
Citation Counts
33
42
3,645
* Total H IndexRankings
Ranking Based On Selection: 24
Fischer Tropsch
catalysis
alternative energy
energy materials
CO2 utilization
Metrics
H-Index
i10 Index
Citation Counts
33
81
3,111
* Total H IndexRankings
Ranking Based On Selection: 25
Facilitation of learning
research as active involvement
researcher accountabilities
Metrics
H-Index
i10 Index
Citation Counts
33
73
4,499
Emmanuel Ifeanyi Obeagu
Africa University
Mutare, Zimbabwe
Metrics
H-Index
i10-Index
Citation Counts
119
499
35,892
Haematology
Immunology
Blood Group Serology
Blood Transfusion Science
Public Health
Eno E. Ebenso
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
109
471
40,098
corrosion
corrosion inhibition
corrosion of metals
adsorption
quantum chemical calculations
Nicholas M Odhiambo
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
67
243
16,039
Bhekie Mamba
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
65
369
20,892
Nanotechnology for Water Treatment
Membrane Technology
Water Treatment Technologies
Hossein Jafari
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
59
215
12,449
Fractional Differential equations
Lie Symmetry
Bio-Mathematics
Ali Akbar Zinatizadeh
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
55
167
16,073
Wastewater treatment technologies
Bioreactors
Membrane technology
Water reuse
Microbial fuel
Melinde Coetzee
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
51
146
10,400
Titus AM Msagati
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
49
188
9,865
Analytical Chemistry
Aquatic Toxicology
Chromatography
Mass spectrometry
Food Chemistry
Patrick Ngulube
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
49
177
8,398
Preservation
Records management
Knowledge management
Research methods
indigenous knowledge
Omar Dagdag
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
45
116
6,020
Polymers
Organic chemistry
Coating
Corrosion
Nanotechnology
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Mike Scurrell
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
43
94
5,996
Catalysis
catalytic energy conversion
fuel cell technology
surface chemistry
Alex Kuvarega
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
41
106
5,208
Advanced oxidation processes
Nanomaterial synthesis
Heterogeneous catalysis
Water treatment
Diane Hildebrandt
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
41
152
6,108
Energy Efficiency
Fischer Tropsch
Process Synthesis
Paul Prinsloo
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
40
88
6,592
educational technology
higher education
learning analytics
student success
Mkhulu Mathe
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
40
86
6,214
Electrochemistry
Electrocatalysis
Energy Storage devices
Electrodeposition
Shivani Bhardwaj Mishra
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
39
103
5,828
Sol-Gel Technology
Nanomaterials
Ceramics and Water Treatment
Godwell Nhamo
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
38
116
5,807
Climate Change
Loss and Damage
Disaster Risk Reduction
SDGs
Coastal Resilience and Livelihoods
Sekhar Chandra Ray
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
38
123
7,656
David Glasser
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
38
140
5,642
Jasper Rees
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
37
61
9,162
genomics
bioinformatics
genetics
plant breeding
plant pathogens
Thabo Ti Nkambule
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
35
89
3,750
Natural Organic Matter
Urban Water Cycle
Nanotechnology for Water Treatment
Drinking Water Treatment
Membrane Science and Te
Zenghui Wang
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
34
96
8,925
Artificial Intelligence
Industry 4.0/5.0
Control Engineering
Evolutionary Optimization
Chaos
K. Obi Reddy
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
33
42
3,645
Polymer Blends & Composites
Preparation and Characterization of Bio-based Polymer Composites
Green Synthesis of Nanomaterial's
Xinying Liu
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
33
81
3,111
Fischer Tropsch
catalysis
alternative energy
energy materials
CO2 utilization
Norma Romm
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
33
73
4,499
Facilitation of learning
research as active involvement
researcher accountabilities