| # | Discipline | Articles | Citations | R ARank | R CRank |
|---|
| 1 | Environment | 192 | 9,616 | 63 | 207 |
| 2 | Biomass Energy | 152 | 8,087 | 19 | 28 |
| 3 | Pollution | 191 | 6,047 | 169 | 454 |
| 4 | Ecology | 174 | 5,155 | 425 | 1.1K |
| 5 | environmental pollution | 184 | 4,858 | 62 | 150 |
| 6 | Environmental Health | 131 | 3,943 | 300 | 680 |
| 7 | Water pollution | 109 | 3,812 | 51 | 116 |
| 8 | Environmental monitoring | 93 | 3,128 | 114 | 184 |
| 9 | Water | 55 | 3,077 | 132 | 171 |
| 10 | Materials | 131 | 2,815 | 779 | 2.0K |
| 11 | Environmental Engineering | 64 | 1,940 | 362 | 994 |
| 12 | Chemical Engineering | 41 | 1,741 | 979 | 980 |
| 13 | Chemistry | 78 | 1,720 | 4.3K | 8.6K |
| 14 | China | 59 | 1,515 | 224 | 126 |
| 15 | environmental protection | 47 | 1,396 | 156 | 446 |
| 16 | Materials Science | 32 | 1,352 | 2.3K | 2.3K |
| 17 | Nanotechnology | 42 | 1,310 | 2.5K | 4.1K |
| 18 | Surface Chemistry | 36 | 1,170 | 811 | 1.0K |
| 19 | Environmental Policy | 35 | 1,166 | 176 | 511 |
| 20 | Biocompatible Materials | 18 | 1,073 | 4.0K | 3.2K |
| 21 | Colloids | 27 | 1,042 | 1.4K | 1.4K |
| 22 | Physics | 54 | 986 | 4.0K | 16.8K |
| 23 | sanitation | 14 | 850 | 1.1K | 1.7K |
| 24 | Biochemical Engineering | 16 | 809 | 629 | 2.1K |
| 25 | Analytical Chemistry | 30 | 797 | 2.2K | 2.8K |
| 25 | Building Materials | 22 | 797 | 32 | 23 |
| 27 | Electrochemistry | 33 | 731 | 668 | 787 |
| 28 | Renewable Energy Sources | 8 | 730 | 513 | 623 |
| 29 | Water quality management | 62 | 728 | 39 | 202 |
| 30 | Optical materials | 27 | 706 | 1.1K | 2.1K |
| 31 | Environmental Management | 34 | 705 | 126 | 726 |
| 32 | Waste management | 55 | 692 | 37 | 118 |
| 32 | Water Purification | 55 | 692 | 33 | 110 |
| 34 | Biotechnology | 30 | 688 | 3.3K | 7.7K |
| 35 | Microbiology | 18 | 653 | 8.5K | 11.0K |
| 36 | environmental exposure | 26 | 630 | 202 | 409 |
| 37 | nanoscience | 18 | 627 | 2.1K | 3.5K |
| 38 | Hazardous waste | 13 | 579 | 77 | 134 |
| 39 | Environmental Law | 3 | 571 | 1.5K | 605 |
| 40 | concrete | 32 | 550 | 23 | 23 |
| 41 | radioactive waste | 6 | 512 | 186 | 144 |
| 41 | industrial waste | 6 | 512 | 207 | 144 |
| 43 | Toxicology | 13 | 501 | 4.6K | 4.3K |
| 44 | pollutants | 11 | 473 | 644 | 707 |
| 44 | Environmental pollutants | 11 | 473 | 949 | 878 |
| 46 | Environmental Toxicology | 11 | 469 | 1.2K | 1.6K |
| 47 | Nanostructured Materials | 18 | 462 | 2.6K | 3.7K |
| 48 | Technology | 35 | 434 | 576 | 2.1K |
| 49 | fuel cells | 5 | 416 | 2.0K | 1.6K |
| 50 | Science | 28 | 402 | 13.0K | 46.6K |
| 51 | Medicine | 25 | 401 | 15.8K | 38.4K |
| 52 | Sustainable Engineering | 7 | 398 | 1.8K | 1.3K |
| 53 | Bioremediation | 9 | 391 | 35 | 67 |
| 54 | Green Chemistry | 4 | 372 | 3.6K | 2.0K |
| 55 | Energy Policy | 11 | 369 | 167 | 211 |
| 56 | Biodegradation | 3 | 364 | 283 | 43 |
| 57 | Structural Engineering | 25 | 352 | 165 | 220 |
| 58 | Ventilation | 28 | 340 | 30 | 143 |
| 59 | Biology | 15 | 337 | 19.9K | 39.4K |
| 59 | Biomedical Engineering | 11 | 337 | 4.8K | 6.0K |
| 61 | Research | 18 | 318 | 16.1K | 30.0K |
| 62 | Nanoparticles | 13 | 307 | 1.2K | 2.3K |
| 63 | Catalysis | 9 | 303 | 4.2K | 4.9K |
| 64 | Carbon | 2 | 302 | 113 | 21 |
| 65 | Environmental Chemistry | 9 | 296 | 1.4K | 2.6K |
| 66 | indoor air pollution | 23 | 292 | 17 | 164 |
| 66 | Sick building syndrome | 23 | 292 | 17 | 164 |
| 68 | Molecular Biology | 8 | 291 | 31.7K | 35.6K |
| 69 | Bioengineering | 9 | 289 | 5.5K | 10.4K |
| 70 | Metals | 15 | 287 | 520 | 448 |
| 71 | Membranes | 6 | 285 | 1.1K | 1.1K |
| 72 | Composite Materials | 9 | 274 | 565 | 418 |
| 73 | Statistical physics | 13 | 254 | 2.0K | 2.5K |
| 74 | Industrial Microbiology | 4 | 246 | 2.9K | 2.5K |
| 75 | Energy Conversion | 2 | 242 | 3.6K | 2.5K |
| 75 | Earthquake Engineering | 20 | 242 | 170 | 390 |
| 77 | Chemical industry | 13 | 241 | 431 | 415 |
| 78 | Magnetic Materials | 8 | 239 | 1.3K | 1.3K |
| 79 | Biochemistry | 10 | 220 | 28.1K | 35.4K |
| 80 | Electrochemical Analysis | 10 | 211 | 322 | 431 |
| 81 | Microbial Ecology | 5 | 210 | 4.5K | 6.4K |
| 82 | Lightweight concrete | 5 | 193 | 2 | 4 |
| 83 | Polymers | 22 | 185 | 3.1K | 7.9K |
| 84 | Ceramics | 15 | 184 | 606 | 1.4K |
| 85 | pottery | 14 | 183 | 478 | 1.3K |
| 86 | Glass | 13 | 180 | 534 | 1.3K |
| 87 | Metallography | 6 | 179 | 18 | 4 |
| 88 | Metallurgy | 19 | 171 | 475 | 1.2K |
| 89 | Nuclear Physics | 6 | 168 | 4.0K | 3.4K |
| 90 | Fracture mechanics | 5 | 165 | 491 | 339 |
| 91 | Nonlinear Dynamics | 4 | 164 | 2.9K | 2.1K |
| 92 | Cement | 5 | 158 | 78 | 35 |
| 93 | Soil Mechanics | 3 | 145 | 809 | 519 |
| 94 | Ceramic materials | 23 | 143 | 43 | 305 |
| 95 | Photonics | 6 | 141 | 2.3K | 3.2K |
| 96 | Geophysics | 4 | 138 | 5.6K | 5.5K |
| 97 | air quality management | 8 | 137 | 98 | 320 |
| 97 | mass transfer | 5 | 137 | 245 | 192 |
| 99 | Artificial Intelligence | 6 | 134 | 3.6K | 4.2K |
| 100 | Structural dynamics | 11 | 133 | 204 | 573 |
| 101 | Biogeochemistry | 6 | 126 | 567 | 1.2K |
| 101 | actuators | 2 | 126 | 1.4K | 766 |
| 101 | transducers | 2 | 126 | 1.4K | 766 |
| 104 | polymerization | 18 | 125 | 2.7K | 7.0K |
| 105 | Engineering | 8 | 124 | 2.9K | 4.4K |
| 106 | Analytical Biochemistry | 8 | 123 | 798 | 1.8K |
| 107 | Biosensors | 2 | 122 | 3.3K | 3.6K |
| 107 | Solid State Chemistry | 4 | 122 | 1.9K | 1.4K |
| 107 | Bioelectronics | 2 | 122 | 2.5K | 3.1K |
| 107 | Japan | 7 | 122 | 1.8K | 1.4K |
| 111 | Biophysics | 2 | 117 | 45.6K | 26.0K |
| 112 | Cancer | 1 | 115 | 40.0K | 30.0K |
| 113 | Microbial Biotechnology | 2 | 113 | 1.9K | 1.2K |
| 113 | energy conservation | 15 | 113 | 160 | 1.4K |
| 115 | Zeolites | 3 | 112 | 7 | 5 |
| 116 | Heat Exchangers | 4 | 110 | 13 | 19 |
| 116 | Corporate Social Responsibility | 2 | 110 | 108 | 132 |
| 116 | environmental auditing | 2 | 110 | 108 | 132 |
| 116 | Telecommunication | 5 | 110 | 2.2K | 2.0K |
| 120 | Ocean Engineering | 7 | 108 | 171 | 213 |
| 120 | city planning | 3 | 108 | 1.4K | 1.0K |
| 122 | Industrial Safety | 2 | 107 | 966 | 382 |
| 123 | miniaturization | 2 | 106 | 7.0K | 8.9K |
| 124 | Engineering Geology | 2 | 103 | 1.6K | 1.1K |
| 125 | Marine Biology | 4 | 102 | 3.0K | 3.7K |
| 125 | Urban Policy | 1 | 102 | 573 | 231 |
| 125 | Marine Pollution | 4 | 102 | 591 | 1.3K |
| 128 | Ultrasonics | 3 | 100 | 1.1K | 1.4K |
| 128 | Sonochemistry | 3 | 100 | 506 | 914 |
| 130 | body temperature | 4 | 99 | 147 | 202 |
| 131 | Atmospheric Physics | 3 | 98 | 2.0K | 2.3K |
| 132 | Tribology | 6 | 94 | 547 | 636 |
| 133 | Atmospheric Chemistry | 2 | 93 | 1.3K | 1.4K |
| 133 | Microelectronics | 1 | 93 | 8.3K | 7.8K |
| 135 | Energy Storage | 14 | 92 | 597 | 2.8K |
| 136 | Rock Mechanics | 2 | 87 | 728 | 504 |
| 137 | Mathematics | 14 | 86 | 4.2K | 6.5K |
| 137 | Spectrum analysis | 5 | 86 | 4.7K | 6.5K |
| 139 | Cosmology | 3 | 83 | 672 | 462 |
| 139 | Planets | 1 | 83 | 5.9K | 4.3K |
| 141 | Solar Energy | 2 | 82 | 639 | 523 |
| 142 | Organometallic chemistry | 6 | 81 | 1.3K | 1.9K |
| 142 | Molecular Spectroscopy | 4 | 81 | 1.6K | 2.0K |
| 144 | Meteorology | 1 | 80 | 8.1K | 6.6K |
| 144 | Engineering Mathematics | 6 | 80 | 2.6K | 2.6K |
| 144 | vibration | 3 | 80 | 1.3K | 838 |
| 147 | Solid State Physics | 5 | 79 | 4.6K | 5.9K |
| 147 | Noise | 2 | 79 | 117 | 27 |
| 147 | Sound | 2 | 79 | 1.3K | 831 |
| 150 | Electronics | 9 | 78 | 3.1K | 6.3K |
| 151 | Education | 1 | 72 | 12.3K | 5.1K |
| 152 | Ecological Engineering | 1 | 70 | 262 | 177 |
| 153 | Integrated Circuits | 9 | 65 | 231 | 295 |
| 154 | health planning | 2 | 62 | 2.3K | 2.2K |
| 155 | Optics | 1 | 61 | 12.6K | 6.9K |
| 155 | Luminescence | 4 | 61 | 460 | 558 |
| 157 | Soil dynamics | 5 | 60 | 40 | 168 |
| 158 | Land use | 2 | 59 | 891 | 1.0K |
| 158 | Bioinorganic chemistry | 2 | 59 | 2.9K | 3.0K |
| 160 | Control Theory | 9 | 58 | 956 | 2.7K |
| 161 | Signal Processing | 2 | 55 | 4.6K | 4.5K |
| 161 | management | 4 | 55 | 1.5K | 3.0K |
| 163 | Chromatography | 6 | 53 | 1.7K | 3.9K |
| 163 | Chromatographic analysis | 6 | 53 | 2.1K | 4.5K |
| 165 | Hydrogeology | 1 | 52 | 2.2K | 1.3K |
| 165 | Geothermal Energy | 1 | 52 | 18 | 34 |
| 165 | Plants | 1 | 52 | 9.1K | 8.9K |
| 168 | Highway Engineering | 2 | 51 | 570 | 461 |
| 168 | energy development | 2 | 51 | 920 | 1.7K |
| 170 | Petroleum Engineering | 2 | 50 | 379 | 381 |
| 171 | Hydraulic Engineering | 3 | 49 | 540 | 832 |
| 172 | Geotechnical Engineering | 1 | 48 | 956 | 884 |
| 172 | Nanostructures | 4 | 48 | 2.9K | 7.6K |
| 174 | Architecture | 5 | 44 | 282 | 686 |
| 174 | Telecommunications | 1 | 44 | 1.3K | 542 |
| 174 | Building | 4 | 44 | 442 | 796 |
| 177 | Transportation | 1 | 42 | 3.0K | 2.2K |
| 177 | air quality | 2 | 42 | 174 | 337 |
| 177 | Chemical processes | 5 | 42 | 409 | 1.1K |
| 180 | Entropy | 3 | 41 | 1.3K | 1.7K |
| 181 | Brain | 2 | 40 | 10.5K | 15.3K |
| 182 | Mining Engineering | 1 | 39 | 406 | 252 |
| 182 | Physiology | 2 | 39 | 25.0K | 37.3K |
| 182 | Combustion | 3 | 39 | 636 | 811 |
| 182 | Neurophysiology | 2 | 39 | 14.9K | 25.3K |
| 182 | human behavior | 2 | 39 | 5.7K | 11.0K |
| 182 | Behavior | 2 | 39 | 9.5K | 15.5K |
| 182 | Psychophysiology | 2 | 39 | 10.2K | 17.2K |
| 189 | Fluid Mechanics | 4 | 38 | 2.6K | 5.1K |
| 190 | lasers | 1 | 37 | 5.0K | 3.4K |
| 191 | Telecommunication Systems | 5 | 36 | 1.1K | 2.2K |
| 191 | Numerical Analysis | 4 | 36 | 2.6K | 3.8K |
| 193 | Health Services Administration | 1 | 35 | 3.5K | 3.9K |
| 193 | Neuropsychology | 1 | 35 | 12.7K | 12.7K |
| 193 | Neurochemistry | 1 | 35 | 17.8K | 20.2K |
| 193 | planning | 1 | 35 | 985 | 604 |
| 197 | Mathematical Physics | 2 | 34 | 4.3K | 3.7K |
| 197 | Electrophoresis | 5 | 34 | 2.2K | 7.4K |
| 197 | Business | 1 | 34 | 2.2K | 1.7K |
| 200 | Financial Engineering | 1 | 33 | 236 | 178 |
| 200 | finance | 1 | 33 | 2.7K | 2.3K |
| 202 | Sustainable agriculture | 1 | 32 | 1.1K | 982 |
| 202 | Semiconductors | 1 | 32 | 1.9K | 1.2K |
| 202 | Microstructure | 1 | 32 | 333 | 131 |
| 202 | Agriculture | 1 | 32 | 7.4K | 6.5K |
| 206 | solar power | 1 | 31 | 390 | 767 |
| 206 | solar cells | 1 | 31 | 741 | 1.2K |
| 208 | clay | 1 | 30 | 506 | 679 |
| 208 | Recycling | 1 | 30 | 92 | 331 |
| 210 | Environmental Geochemistry | 1 | 29 | 1.1K | 1.0K |
| 210 | Minerals | 1 | 29 | 1.4K | 1.4K |
| 212 | Electrical Engineering | 4 | 28 | 4.5K | 5.0K |
| 212 | Indoor air quality | 3 | 28 | 69 | 128 |
| 212 | Air Conditioning | 3 | 28 | 148 | 294 |
| 212 | Condensed Matter | 9 | 28 | 2.8K | 8.8K |
| 212 | heating | 3 | 28 | 116 | 255 |
| 217 | Water quality | 6 | 27 | 50 | 666 |
| 217 | Water chemistry | 6 | 27 | 65 | 802 |
| 219 | Automation | 3 | 26 | 3.1K | 5.8K |
| 219 | biofuels | 1 | 26 | 1.0K | 2.0K |
| 221 | Paleoclimatology | 1 | 25 | 1.0K | 1.4K |
| 221 | Paleoecology | 1 | 25 | 920 | 971 |
| 221 | Paleogeography | 1 | 25 | 80 | 106 |
| 221 | bioluminescence | 3 | 25 | 456 | 846 |
| 221 | computer networks | 2 | 25 | 2.9K | 3.6K |
| 226 | Bioenergetics | 2 | 23 | 1.3K | 3.7K |
| 226 | Dynamics | 8 | 23 | 843 | 3.9K |
| 226 | Avionics | 2 | 23 | 27 | 72 |
| 226 | Photochemistry | 1 | 23 | 4.9K | 6.1K |
| 226 | River Engineering | 1 | 23 | 114 | 82 |
| 226 | Ferroelectricity | 2 | 23 | 1.4K | 1.5K |
| 226 | Photobiology | 1 | 23 | 2.0K | 2.5K |
| 233 | Sedimentology | 3 | 22 | 432 | 1.9K |
| 233 | soil pollution | 3 | 22 | 390 | 1.3K |
| 233 | Evolutionary Computation | 1 | 22 | 559 | 982 |
| 233 | Swarm Intelligence | 1 | 22 | 90 | 206 |
| 233 | Australia | 2 | 22 | 4.6K | 7.4K |
| 238 | Data Mining | 1 | 21 | 4.1K | 5.0K |
| 238 | Nondestructive testing | 1 | 21 | 1.1K | 1.1K |
| 238 | data collection | 1 | 21 | 2.6K | 3.5K |
| 238 | marketing | 1 | 21 | 1.4K | 1.4K |
| 242 | Algebra | 3 | 20 | 1.4K | 1.3K |
| 242 | Manufacturing Processes | 2 | 20 | 3.4K | 5.1K |
| 242 | Decision making | 2 | 20 | 2.4K | 5.8K |
| 245 | Quantum Chemistry | 4 | 19 | 827 | 2.1K |
| 245 | Surface-Active Agents | 2 | 19 | 2.1K | 7.0K |
| 245 | Surface properties | 2 | 19 | 2.1K | 7.0K |
| 248 | Hydrology | 9 | 17 | 1.4K | 10.5K |
| 248 | particles | 2 | 17 | 826 | 2.3K |
| 250 | Traffic Engineering | 1 | 16 | 852 | 1.2K |
| 250 | Computational Biology | 4 | 16 | 8.2K | 31.2K |
| 250 | Statistical Mechanics | 6 | 16 | 333 | 1.5K |
| 250 | Computational Intelligence | 3 | 16 | 801 | 2.3K |
| 250 | forest policy | 1 | 16 | 221 | 252 |
| 255 | Computational Fluid Dynamics | 2 | 15 | 354 | 742 |
| 255 | Nanotubes | 2 | 15 | 215 | 471 |
| 257 | Mechanical Engineering | 2 | 14 | 4.3K | 6.1K |
| 257 | Information management | 1 | 14 | 122 | 247 |
| 259 | Measurement | 4 | 13 | 388 | 1.7K |
| 259 | Alloys | 4 | 13 | 171 | 503 |
| 261 | Soil ecology | 1 | 12 | 775 | 1.6K |
| 262 | Materials Engineering | 1 | 11 | 1.7K | 2.5K |
| 262 | Freshwater Ecology | 1 | 11 | 458 | 688 |
| 262 | rivers | 1 | 11 | 532 | 1.0K |
| 265 | Geography | 1 | 10 | 6.6K | 10.6K |
| 265 | Information Technology | 1 | 10 | 5.6K | 7.9K |
| 265 | Soil Science | 1 | 10 | 3.9K | 6.6K |
| 265 | Educational Technology | 1 | 10 | 3.1K | 4.9K |
| 265 | Social Change | 1 | 10 | 635 | 1.7K |
| 265 | Neuroplasticity | 1 | 10 | 1.4K | 3.4K |
| 265 | Calorimetry | 1 | 10 | 2.9K | 4.0K |
| 265 | neuronal plasticity | 1 | 10 | 1.1K | 3.1K |
| 265 | United States | 1 | 10 | 30.4K | 41.6K |
| 265 | biomedicine | 1 | 10 | 3.6K | 7.4K |
| 265 | biological monitoring | 2 | 10 | 678 | 2.7K |
| 265 | Quantum theory | 1 | 10 | 1.3K | 1.8K |
| 265 | Thermal analysis | 1 | 10 | 2.9K | 4.0K |
| 278 | Industrial Engineering | 2 | 9 | 4.9K | 12.3K |
| 278 | food contamination | 1 | 9 | 3.2K | 5.4K |
| 278 | Crystallography | 3 | 9 | 3.0K | 5.3K |
| 278 | compost | 1 | 9 | 48 | 102 |
| 282 | Computer Science | 2 | 8 | 3.3K | 8.0K |
| 282 | Agricultural Engineering | 1 | 8 | 535 | 435 |
| 282 | Public Administration | 1 | 8 | 2.4K | 3.7K |
| 282 | Superconductors | 1 | 8 | 1.3K | 1.6K |
| 282 | Parallel Processing | 1 | 8 | 687 | 1.2K |
| 282 | mathematical analysis | 1 | 8 | 4.3K | 4.3K |
| 282 | Nonlinear systems | 1 | 8 | 1.6K | 2.6K |
| 289 | Astronomy | 1 | 7 | 6.7K | 8.4K |
| 289 | Sustainable Architecture | 2 | 7 | 173 | 460 |
| 289 | Astrophysics | 1 | 7 | 5.8K | 7.7K |
| 289 | Geochemistry | 1 | 7 | 3.2K | 5.6K |
| 289 | Bifurcation Theory | 1 | 7 | 1.2K | 2.1K |
| 294 | Organic Chemistry | 1 | 6 | 13.0K | 21.4K |
| 294 | Regional Planning | 1 | 6 | 3.6K | 6.3K |
| 294 | Organometallic compounds | 1 | 6 | 3.8K | 6.5K |
| 297 | Social Sciences | 1 | 5 | 10.9K | 16.9K |
| 297 | Neurology | 1 | 5 | 62.7K | 65.0K |
| 297 | Genetics | 1 | 5 | 32.4K | 56.9K |
| 297 | Sociology | 1 | 5 | 8.1K | 15.8K |
| 297 | Climatology | 1 | 5 | 5.0K | 9.4K |
| 297 | Engineering Economics | 1 | 5 | 59 | 120 |
| 297 | Genomics | 1 | 5 | 22.9K | 41.5K |
| 297 | Clinical Chemistry | 1 | 5 | 18.9K | 35.8K |
| 297 | Biotransformation | 2 | 5 | 176 | 868 |
| 297 | bioclimatology | 1 | 5 | 1.9K | 4.1K |
| 297 | Quality of life | 1 | 5 | 5.3K | 11.3K |
| 297 | Climate | 1 | 5 | 986 | 2.6K |
| 297 | weather | 1 | 5 | 961 | 2.4K |
| 297 | enzymes | 2 | 5 | 3.5K | 13.1K |
| 311 | Medical Technology | 1 | 4 | 7.4K | 18.4K |
| 311 | Architectural Design | 1 | 4 | 1.1K | 2.5K |
| 311 | Wireless Communication Systems | 1 | 4 | 4.9K | 7.3K |
| 311 | Water Conservation | 2 | 4 | 52 | 282 |
| 311 | Multimedia Systems | 2 | 4 | 2.4K | 5.5K |
| 311 | East Asia | 1 | 4 | 864 | 1.5K |
| 311 | Chemical analysis | 1 | 4 | 4.4K | 9.1K |
| 311 | Granular materials | 1 | 4 | 314 | 665 |
| 311 | multimedia | 2 | 4 | 310 | 692 |
| 311 | Interactive multimedia | 2 | 4 | 328 | 864 |
| 311 | smart structures | 1 | 4 | 183 | 336 |
| 311 | venom | 1 | 4 | 1.4K | 3.6K |
| 311 | Toxins | 1 | 4 | 1.8K | 4.4K |
| 324 | Civil Engineering | 1 | 3 | 3.9K | 6.7K |
| 324 | Structural design | 1 | 3 | 1.4K | 3.0K |
| 324 | Quantum electronics | 1 | 3 | 3.6K | 5.8K |
| 324 | Smart Materials | 1 | 3 | 1.8K | 3.9K |
| 324 | Chemical kinetics | 1 | 3 | 1.8K | 3.1K |
| 324 | machinery | 1 | 3 | 1.1K | 1.9K |
| 324 | Asia | 2 | 3 | 4.4K | 15.4K |
| 324 | Fibers | 1 | 3 | 132 | 318 |
| 324 | India | 1 | 3 | 4.3K | 7.2K |
| 324 | impact | 1 | 3 | 17 | 50 |
| 334 | Risk assessment | 1 | 2 | 1.2K | 3.9K |
| 334 | ecological risk assessment | 1 | 2 | 595 | 2.0K |
| 334 | sustainability | 1 | 2 | 1.5K | 3.9K |
| 334 | Food | 1 | 2 | 15.8K | 32.8K |
| 334 | starch | 1 | 2 | 920 | 2.2K |
| 334 | internet | 1 | 2 | 2.6K | 5.4K |
| 334 | Health Risk Assessment | 1 | 2 | 1.0K | 3.2K |
| 334 | Heterocyclic compounds | 1 | 2 | 2.5K | 4.5K |
| 334 | Europe | 1 | 2 | 15.9K | 28.6K |
| 343 | Public Health | 2 | 1 | 24.3K | 62.9K |
| 343 | Robotics | 2 | 1 | 3.0K | 9.4K |
| 343 | Probability | 1 | 1 | 1.5K | 3.9K |
| 343 | Particle Physics | 1 | 1 | 641 | 1.3K |
| 343 | Risk Management | 1 | 1 | 1.7K | 5.3K |
| 343 | Electronic Packaging | 1 | 1 | 512 | 1.1K |
| 343 | Thin Films | 1 | 1 | 1.2K | 3.2K |
| 343 | Climate change | 2 | 1 | 2.3K | 9.0K |
| 343 | Biodiversity conservation | 2 | 1 | 3.7K | 12.6K |
| 343 | Eutrophication | 2 | 1 | 2.2K | 8.0K |
| 343 | Bioinformatics | 3 | 1 | 7.6K | 33.5K |
| 343 | Financial management | 1 | 1 | 1.0K | 3.3K |
| 343 | Risk | 1 | 1 | 1.4K | 4.1K |
| 343 | System analysis | 2 | 1 | 4.2K | 14.7K |
| 343 | Pacific Islands | 1 | 1 | 458 | 1.5K |
| 343 | Natural history | 1 | 1 | 22.6K | 42.6K |
| 359 | Systems Engineering | 1 | 0 | 6.2K | 12.3K |
| 359 | Environmental Microbiology | 1 | 0 | 6.4K | 16.1K |
| 359 | Systems Analysis | 1 | 0 | 2.4K | 6.5K |
| 359 | Agricultural Ecology | 1 | 0 | 3.5K | 9.3K |
| 359 | Quality Control | 1 | 0 | 3.6K | 9.7K |
| 359 | Organizational change | 1 | 0 | 694 | 2.4K |
| 359 | microwave antennas | 1 | 0 | 692 | 1.6K |
| 359 | gene therapy | 1 | 0 | 7.1K | 18.0K |
| 359 | Radio wave propagation | 1 | 0 | 1.6K | 3.7K |
| 359 | Child Development | 1 | 0 | 7.6K | 17.9K |
| 359 | Water Microbiology | 1 | 0 | 1.2K | 4.4K |
| 359 | innovation | 1 | 0 | 593 | 2.5K |
| 359 | Pakistan | 1 | 0 | 1.3K | 2.8K |
| 359 | Archaea | 1 | 0 | 117 | 569 |
| 359 | Genetic therapy | 1 | 0 | 9.3K | 23.1K |
| 359 | Microwaves | 1 | 0 | 3.0K | 5.6K |
| 359 | genome | 1 | 0 | 13.2K | 30.8K |
