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 03, 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 (1.131.752) 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].
Rankings
Rankings
Drying | Adsorption | Extraction | Essential Oils | Biofuel
H-Index Metrics
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H-Index52
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i10 Index140
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Citation Counts8,324
Rankings
Chemical Engineering | Bioprocess | Food Engineering | Microalgae
H-Index Metrics
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H-Index44
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i10 Index193
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Citation Counts7,847
Rankings
Virtual Material and Artificial Intelligence | Sustainability | Ionic Liquid
H-Index Metrics
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H-Index38
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i10 Index71
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Citation Counts4,236
Rankings
Supercritical Fluids Technology | Extraction | Micronization | Material Synthesi
H-Index Metrics
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H-Index37
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i10 Index105
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Citation Counts5,235
Rankings
Rankings
Food Engineering | Chemical Reaction Engineering | Membrane Development for WWT | Separation Processe
H-Index Metrics
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H-Index34
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i10 Index101
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Citation Counts3,974
Rankings
Chemical Reaction Engineering | Biofuel | Essential oil | sonochemistry | microwave chemistr
H-Index Metrics
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H-Index33
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i10 Index116
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Citation Counts4,140
Rankings
Process system engineering | Microalgae biorefinery | Energy & exergy analysis | Biodiesel | Biomass to energ
H-Index Metrics
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H-Index33
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i10 Index120
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Citation Counts4,576
Rankings
Biotechnology | Chemical Engineering | Bio Energy | Food Engineering | Food Technolog
H-Index Metrics
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H-Index31
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i10 Index71
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Citation Counts2,832
Rankings
Membrane Technology | Inorganic Membranes | organa-silica membranes | Wetland saline water | Coal Bed Methan
H-Index Metrics
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H-Index30
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i10 Index78
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Citation Counts3,415
Rankings
Rankings
Rankings
Rankings
chemical engineering | aerosol technology | particles technolog
H-Index Metrics
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H-Index29
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i10 Index73
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Citation Counts3,233
Rankings
Chemical Engineering | Environment | Nanomaterials | Biomass Valorizatio
H-Index Metrics
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H-Index29
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i10 Index47
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Citation Counts2,978
Rankings
Water and Waste Water Treatment | Membrane Technolog
H-Index Metrics
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H-Index28
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i10 Index62
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Citation Counts2,093
Rankings
Chemical Engineering | Bioprocess Engineering | Environmental Engineerin
H-Index Metrics
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H-Index28
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i10 Index87
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Citation Counts3,034
Rankings
Reaction engineering | Catalysis | Chemical and Natural New Product Design | Natural resources utilizatio
H-Index Metrics
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H-Index28
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i10 Index59
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Citation Counts2,642
Rankings
Biorefinery | Bioprocess | Catalysis | Marine Natural Produc
H-Index Metrics
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H-Index27
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i10 Index53
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Citation Counts2,220
Rankings
Emulsion | membrane | membrane emulsification | surfactant
H-Index Metrics
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H-Index27
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i10 Index73
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Citation Counts2,678
Rankings
Rankings
Metallurgy | Circular Economy | Mineral Processing | Hydrometallurgy | Hydro-electrometallurg
H-Index Metrics
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H-Index26
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i10 Index78
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Citation Counts2,569
Rankings
bioenergy and biofuel | energy conservation | food fermentation | material technology | catalyst and catalysi
H-Index Metrics
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H-Index26
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i10 Index74
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Citation Counts2,658
Rankings
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