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The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 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 5 years. As of Jan 06, 2026, 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 (1.131.911) 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 Index Rankings
Rankings
2,871
World Rank
3
Country Rank
1
University
Ranking Based On Selection:
1
* Total H Index Rankings
Rankings
12,413
World Rank
41
Country Rank
22
University
Ranking Based On Selection:
2
Engineering & Technology / Chemical Engineering
Membranes | membrane separations | polymer synthesis | chemical engineerin
Membranes | membrane separations | polymer synthesis | chemical engineerin
H-Index Metrics
-
H-Index96
-
i10 Index244
-
Citation Counts32,848
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* Total H Index Rankings
Rankings
21,458
World Rank
3
Country Rank
2
University
Ranking Based On Selection:
3
Engineering & Technology / Chemical Engineering
Sustainable Energy | Sustainable Fuels | Waste to Energy | Biohydrogen | Biocha
Sustainable Energy | Sustainable Fuels | Waste to Energy | Biohydrogen | Biocha
H-Index Metrics
-
H-Index82
-
i10 Index221
-
Citation Counts23,972
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* Total H Index Rankings
Rankings
26,744
World Rank
83
Country Rank
33
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
27,553
World Rank
28
Country Rank
7
University
Ranking Based On Selection:
5
Engineering & Technology / Chemical Engineering
Graphene | 2D Materials | Membrane separations | sustainable desalination | Research Managemen
Graphene | 2D Materials | Membrane separations | sustainable desalination | Research Managemen
H-Index Metrics
-
H-Index76
-
i10 Index153
-
Citation Counts17,901
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* Total H Index Rankings
Rankings
32,381
World Rank
103
Country Rank
44
University
Ranking Based On Selection:
6
Engineering & Technology / Chemical Engineering
Polymerization | Block Copolymers | Chemical Synthesis | Macromolecular engineering | Functional polymers for biomedical applicatio
Polymerization | Block Copolymers | Chemical Synthesis | Macromolecular engineering | Functional polymers for biomedical applicatio
H-Index Metrics
-
H-Index73
-
i10 Index228
-
Citation Counts18,303
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* Total H Index Rankings
Rankings
33,348
World Rank
109
Country Rank
46
University
Ranking Based On Selection:
7
Engineering & Technology / Chemical Engineering
polymeric membranes | self-assembly | hybrid material
polymeric membranes | self-assembly | hybrid material
H-Index Metrics
-
H-Index72
-
i10 Index179
-
Citation Counts18,710
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* Total H Index Rankings
Rankings
35,720
World Rank
120
Country Rank
50
University
Ranking Based On Selection:
8
Engineering & Technology / Chemical Engineering
Membranes | Gas Separations | Water Desalination | Porous Materials | Chemical Engineerin
Membranes | Gas Separations | Water Desalination | Porous Materials | Chemical Engineerin
H-Index Metrics
-
H-Index70
-
i10 Index170
-
Citation Counts20,278
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* Total H Index Rankings
Rankings
37,445
World Rank
30
Country Rank
11
University
Ranking Based On Selection:
9
Engineering & Technology / Chemical Engineering
Ionic liquids | natural gas hydrates | membrane distilation CO2 conversion | wastewater treatment | adsorptio
Ionic liquids | natural gas hydrates | membrane distilation CO2 conversion | wastewater treatment | adsorptio
H-Index Metrics
-
H-Index69
-
i10 Index191
-
Citation Counts20,296
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* Total H Index Rankings
Rankings
40,771
World Rank
33
Country Rank
13
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
40,818
World Rank
40
Country Rank
10
University
Ranking Based On Selection:
11
Engineering & Technology / Chemical Engineering
Ionic liquids | deep eutectic solvents | green engineering | water and wastewater treatmen
Ionic liquids | deep eutectic solvents | green engineering | water and wastewater treatmen
H-Index Metrics
-
H-Index67
-
i10 Index156
-
Citation Counts16,771
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* Total H Index Rankings
Rankings
45,039
World Rank
7
Country Rank
2
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
49,183
World Rank
53
Country Rank
16
University
Ranking Based On Selection:
13
Engineering & Technology / Chemical Engineering
separation materials | resource recovery | micro-pollutants management | green metallurgy | membrane
separation materials | resource recovery | micro-pollutants management | green metallurgy | membrane
H-Index Metrics
-
H-Index63
-
i10 Index205
-
Citation Counts13,583
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* Total H Index Rankings
Rankings
49,349
World Rank
192
Country Rank
29
University
Ranking Based On Selection:
14
Engineering & Technology / Chemical Engineering
Acoustic Cavitation | Sonochemistry | Liquid Membrane | Advanced Oxidation | Separation Processe
Acoustic Cavitation | Sonochemistry | Liquid Membrane | Advanced Oxidation | Separation Processe
H-Index Metrics
-
H-Index63
-
i10 Index180
-
Citation Counts15,164
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* Total H Index Rankings
Rankings
54,700
World Rank
210
Country Rank
17
University
Ranking Based On Selection:
15
Engineering & Technology / Chemical Engineering
Catalysis | Reaction Engineering | Refining and Petrochemicals | CO2 capture | Renewable energ
Catalysis | Reaction Engineering | Refining and Petrochemicals | CO2 capture | Renewable energ
H-Index Metrics
-
H-Index61
-
i10 Index320
-
Citation Counts19,727
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* Total H Index Rankings
Rankings
56,599
World Rank
10
Country Rank
6
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
59,137
World Rank
232
Country Rank
1
University
Ranking Based On Selection:
17
Engineering & Technology / Chemical Engineering
Electrocoagulation | Chemical Engineering | Environmental Engineering | Green Chemistry | Wate
Electrocoagulation | Chemical Engineering | Environmental Engineering | Green Chemistry | Wate
H-Index Metrics
-
H-Index59
-
i10 Index183
-
Citation Counts10,368
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* Total H Index Rankings
Rankings
62,849
World Rank
70
Country Rank
25
University
Ranking Based On Selection:
18
Engineering & Technology / Chemical Engineering
chemical engineering | applied thermodynamics | separation technolog
chemical engineering | applied thermodynamics | separation technolog
H-Index Metrics
-
H-Index58
-
i10 Index107
-
Citation Counts12,546
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* Total H Index Rankings
Rankings
65,021
World Rank
260
Country Rank
30
University
Ranking Based On Selection:
19
Engineering & Technology / Chemical Engineering
Chemical Engineering | Energy and Fuels | Waste-to-Energy | Nanomaterials | Pyrolysi
Chemical Engineering | Energy and Fuels | Waste-to-Energy | Nanomaterials | Pyrolysi
H-Index Metrics
-
H-Index57
-
i10 Index111
-
Citation Counts13,477
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* Total H Index Rankings
Rankings
65,033
World Rank
24
Country Rank
4
University
Ranking Based On Selection:
20
Engineering & Technology / Chemical Engineering
Nanoporous Materials | Catalyst | Wastewater treatment | Desulfurization | Drug Delivery
Nanoporous Materials | Catalyst | Wastewater treatment | Desulfurization | Drug Delivery
H-Index Metrics
-
H-Index57
-
i10 Index96
-
Citation Counts6,025
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* Total H Index Rankings
Rankings
65,136
World Rank
13
Country Rank
1
University
Ranking Based On Selection:
21
Engineering & Technology / Chemical Engineering
Biochemical Engineering | Biopolymers | nanocomposite
Biochemical Engineering | Biopolymers | nanocomposite
H-Index Metrics
-
H-Index57
-
i10 Index111
-
Citation Counts10,486
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* Total H Index Rankings
Rankings
71,706
World Rank
296
Country Rank
3
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
76,049
World Rank
80
Country Rank
34
University
Ranking Based On Selection:
23
Engineering & Technology / Chemical Engineering
Solar Thermal Processes | Alternative Fuels | CO2 Capture & Utilization | Materials and Catalysi
Solar Thermal Processes | Alternative Fuels | CO2 Capture & Utilization | Materials and Catalysi
H-Index Metrics
-
H-Index54
-
i10 Index128
-
Citation Counts7,330
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* Total H Index Rankings
Rankings
77,645
World Rank
13
Country Rank
3
University
Ranking Based On Selection:
24
Engineering & Technology / Chemical Engineering
hydrotreating | hydrodesulfurization | sorption | fuel | CO2 captur
hydrotreating | hydrodesulfurization | sorption | fuel | CO2 captur
H-Index Metrics
-
H-Index54
-
i10 Index109
-
Citation Counts13,752
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Premium Data
* Total H Index Rankings
Rankings
83,397
World Rank
359
Country Rank
55
University
Ranking Based On Selection:
25
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