| 1 | Science | 1,328 | 180.9K | 269 | 168 |
| 2 | Biology | 1,114 | 141.8K | 319 | 213 |
| 3 | Physics | 824 | 126.1K | 564 | 268 |
| 4 | Oceanography | 1,906 | 123.8K | 4 | 3 |
| 5 | Geophysics | 2,095 | 111.9K | 27 | 18 |
| 6 | Natural history | 598 | 109.0K | 89 | 138 |
| 7 | Marine Biology | 930 | 73.1K | 13 | 3 |
| 8 | Geology | 854 | 64.6K | 40 | 18 |
| 9 | Meteorology | 832 | 50.3K | 32 | 32 |
| 10 | Planets | 817 | 46.3K | 25 | 23 |
| 11 | Ecology | 533 | 45.1K | 290 | 213 |
| 12 | Astronomy | 503 | 39.2K | 309 | 258 |
| 13 | Microbiology | 369 | 37.8K | 507 | 296 |
| 14 | Climatology | 533 | 35.8K | 22 | 22 |
| 15 | Earth Sciences | 300 | 33.8K | 96 | 25 |
| 16 | Geochemistry | 538 | 32.9K | 33 | 25 |
| 17 | Marine Meteorology | 495 | 32.3K | 4 | 3 |
| 18 | Biotechnology | 38 | 27.6K | 2296 | 213 |
| 19 | Chemistry | 355 | 27.1K | 1121 | 727 |
| 20 | Bioengineering | 18 | 25.7K | 2298 | 136 |
| 21 | Biochemical Engineering | 13 | 25.6K | 1914 | 99 |
| 22 | Atmospheric Physics | 430 | 24.7K | 48 | 52 |
| 23 | Biochemistry | 390 | 23.6K | 1014 | 712 |
| 24 | Microbial Ecology | 280 | 23.1K | 63 | 75 |
| 25 | Meteorites | 273 | 22.6K | 30 | 26 |
| 26 | Environment | 243 | 22.5K | 351 | 269 |
| 27 | Atmospheric Chemistry | 270 | 19.2K | 43 | 55 |
| 28 | Research | 222 | 18.0K | 1123 | 511 |
| 29 | natural products | 187 | 17.9K | 35 | 5 |
| 30 | Medicine | 217 | 17.9K | 1531 | 937 |
| 31 | Water | 123 | 12.8K | 213 | 103 |
| 32 | biological evolution | 147 | 11.8K | 169 | 161 |
| 33 | Environmental Health | 214 | 11.3K | 406 | 373 |
| 34 | Chemical Oceanography | 81 | 11.0K | 10 | 2 |
| 35 | Pollution | 182 | 10.9K | 559 | 508 |
| 36 | Molecular Biology | 183 | 9.9K | 1315 | 1253 |
| 37 | biological factors | 53 | 9.4K | 234 | 11 |
| 38 | Biodiversity | 121 | 9.2K | 130 | 80 |
| 39 | Evolution | 102 | 8.8K | 204 | 156 |
| 40 | Biogeochemistry | 102 | 8.7K | 72 | 51 |
| 41 | Seismology | 164 | 8.7K | 21 | 13 |
| 42 | Pharmacognosy | 133 | 8.5K | 74 | 34 |
| 43 | Zoology | 159 | 8.4K | 179 | 67 |
| 44 | Neurophysiology | 127 | 7.9K | 443 | 429 |
| 45 | Developmental Biology | 143 | 7.9K | 215 | 269 |
| 46 | Botany | 135 | 7.6K | 633 | 511 |
| 47 | Geomagnetism | 202 | 7.6K | 21 | 12 |
| 48 | Comparative Physiology | 132 | 7.1K | 17 | 11 |
| 49 | Animal Behavior | 122 | 7.1K | 205 | 166 |
| 50 | Environmental Engineering | 118 | 7.0K | 370 | 321 |
| 51 | Statistical physics | 42 | 6.8K | 1329 | 362 |
| 52 | Neurology | 102 | 6.5K | 1326 | 1131 |
| 53 | Neuropsychology | 105 | 6.2K | 265 | 165 |
| 54 | Psychophysiology | 105 | 5.9K | 488 | 395 |
| 55 | Physiology | 136 | 5.7K | 625 | 580 |
| 56 | Optics | 103 | 5.6K | 935 | 376 |
| 57 | sanitation | 80 | 5.2K | 207 | 259 |
| 58 | Environmental Microbiology | 77 | 5.2K | 83 | 94 |
| 59 | Algae | 125 | 5.0K | 26 | 20 |
| 60 | Hydrometeorology | 56 | 4.4K | 14 | 19 |
| 61 | optical instruments | 20 | 4.4K | 115 | 17 |
| 62 | Biodiversity conservation | 58 | 4.3K | 295 | 360 |
| 63 | Cytology | 60 | 4.2K | 1283 | 1248 |
| 64 | Fisheries | 106 | 4.2K | 141 | 110 |
| 65 | environmental protection | 42 | 4.2K | 795 | 310 |
| 66 | Petrology | 55 | 4.1K | 189 | 104 |
| 67 | Molecular evolution | 57 | 3.8K | 238 | 193 |
| 68 | Molecular Genetics | 63 | 3.8K | 330 | 282 |
| 69 | Water pollution | 61 | 3.7K | 478 | 366 |
| 70 | Mineralogy | 44 | 3.6K | 340 | 142 |
| 71 | Cell Biology | 47 | 3.6K | 1409 | 1354 |
| 72 | Seaweed | 81 | 3.6K | 21 | 19 |
| 73 | Climate change | 41 | 3.6K | 199 | 350 |
| 73 | Eutrophication | 41 | 3.6K | 193 | 348 |
| 75 | Nuclear Physics | 7 | 3.6K | 3544 | 1048 |
| 76 | Biogeochemical cycles | 63 | 3.5K | 24 | 68 |
| 77 | plankton | 64 | 3.4K | 1 | 1 |
| 78 | Embryology | 66 | 3.4K | 292 | 345 |
| 79 | Marine Pollution | 43 | 3.3K | 140 | 70 |
| 80 | Aquatic ecology | 30 | 3.1K | 158 | 17 |
| 81 | Anatomy | 64 | 3.1K | 345 | 333 |
| 82 | Nonlinear Dynamics | 36 | 3.1K | 743 | 303 |
| 83 | Genetics | 29 | 3.0K | 1683 | 1153 |
| 84 | Pharmaceutical Chemistry | 45 | 3.0K | 1219 | 797 |
| 85 | Organic Chemistry | 44 | 2.9K | 1046 | 510 |
| 86 | Marine Ecology | 74 | 2.9K | 34 | 15 |
| 87 | Environmental Policy | 43 | 2.8K | 765 | 612 |
| 88 | atmospheric models | 62 | 2.6K | 98 | 145 |
| 89 | Marine mammals | 62 | 2.6K | 13 | 9 |
| 90 | Ocean Engineering | 65 | 2.6K | 229 | 164 |
| 91 | cryosphere | 51 | 2.6K | 47 | 49 |
| 92 | Growth | 41 | 2.5K | 288 | 362 |
| 93 | Microorganisms | 20 | 2.5K | 401 | 223 |
| 94 | Hydrology | 54 | 2.4K | 507 | 410 |
| 95 | Virology | 13 | 2.4K | 2033 | 1322 |
| 96 | Environmental monitoring | 51 | 2.4K | 833 | 802 |
| 97 | Fluid Mechanics | 32 | 2.3K | 507 | 193 |
| 98 | polar regions | 49 | 2.3K | 74 | 34 |
| 99 | infection | 11 | 2.3K | 1073 | 274 |
| 100 | Analytical Chemistry | 50 | 2.3K | 1408 | 1035 |
| 101 | Mathematics | 42 | 2.3K | 2311 | 929 |
| 102 | Paleoclimatology | 38 | 2.3K | 231 | 148 |
| 103 | Virulence | 7 | 2.3K | 953 | 330 |
| 104 | Molecular ecology | 38 | 2.3K | 244 | 281 |
| 105 | United States | 75 | 2.2K | 1040 | 944 |
| 106 | Infections | 5 | 2.2K | 1222 | 228 |
| 107 | Bioorganic chemistry | 34 | 2.2K | 944 | 565 |
| 108 | atmosphere | 23 | 2.2K | 186 | 53 |
| 109 | Technology | 45 | 2.2K | 1122 | 657 |
| 110 | Animal ecology | 17 | 2.1K | 527 | 202 |
| 111 | Engineering | 35 | 2.1K | 1339 | 456 |
| 112 | Population Genetics | 36 | 2.1K | 296 | 291 |
| 113 | Earthquakes | 65 | 2.0K | 24 | 16 |
| 114 | environmental pollution | 52 | 1.9K | 1150 | 1258 |
| 115 | Fluid Dynamics | 38 | 1.9K | 230 | 117 |
| 116 | Biophysics | 71 | 1.9K | 1681 | 1778 |
| 116 | Aerosols | 25 | 1.9K | 144 | 64 |
| 118 | Continental shelf | 41 | 1.9K | 41 | 47 |
| 119 | Phylogeny | 31 | 1.8K | 168 | 141 |
| 120 | Geodynamics | 41 | 1.8K | 162 | 161 |
| 121 | Ecosystem management | 8 | 1.7K | 412 | 76 |
| 122 | Bacteriology | 14 | 1.7K | 1073 | 619 |
| 123 | Cell differentiation | 16 | 1.7K | 968 | 733 |
| 124 | Paleoceanography | 21 | 1.7K | 44 | 46 |
| 125 | Clinical Chemistry | 20 | 1.7K | 1460 | 801 |
| 126 | water supply | 36 | 1.6K | 222 | 228 |
| 127 | Estuaries | 25 | 1.6K | 38 | 36 |
| 128 | Systems Biology | 40 | 1.6K | 264 | 191 |
| 129 | Origin of life | 25 | 1.6K | 6 | 5 |
| 129 | Organelle biogenesis | 25 | 1.6K | 15 | 8 |
| 131 | Geochemical Modeling | 34 | 1.5K | 47 | 70 |
| 131 | geological modeling | 34 | 1.5K | 56 | 71 |
| 133 | Environmental Law | 21 | 1.5K | 323 | 307 |
| 134 | Thermodynamics | 2 | 1.4K | 1711 | 64 |
| 134 | Thermochemistry | 2 | 1.4K | 691 | 44 |
| 136 | Paleoecology | 33 | 1.4K | 238 | 207 |
| 137 | Marine Geophysics | 43 | 1.4K | 15 | 7 |
| 138 | Paleogeography | 29 | 1.4K | 236 | 190 |
| 139 | Cosmochemistry | 48 | 1.4K | 77 | 149 |
| 140 | Astrophysics | 42 | 1.3K | 1373 | 1466 |
| 141 | Agriculture | 29 | 1.3K | 685 | 484 |
| 142 | Data Mining | 23 | 1.3K | 376 | 361 |
| 142 | data collection | 23 | 1.3K | 181 | 260 |
| 144 | Photochemistry | 20 | 1.3K | 611 | 304 |
| 145 | Light | 39 | 1.2K | 147 | 436 |
| 146 | Environmental Chemistry | 24 | 1.1K | 648 | 791 |
| 147 | Ethology | 15 | 1.1K | 751 | 608 |
| 148 | Public Health | 24 | 1.1K | 2705 | 2127 |
| 149 | Environmental Toxicology | 17 | 1.1K | 1069 | 796 |
| 150 | Respiration | 20 | 1.1K | 648 | 476 |
| 151 | gene mapping | 16 | 1.1K | 1003 | 797 |
| 152 | Planetary Science | 33 | 1.1K | 107 | 81 |
| 152 | Genetic engineering | 25 | 1.1K | 759 | 767 |
| 154 | Asia | 15 | 1.0K | 1277 | 339 |
| 155 | soil microbiology | 12 | 1.0K | 798 | 646 |
| 156 | Climate | 26 | 995 | 80 | 109 |
| 157 | Immunology | 9 | 986 | 3087 | 2025 |
| 158 | ecosystem | 31 | 972 | 323 | 509 |
| 159 | Chemical Ecology | 14 | 962 | 200 | 117 |
| 160 | Transport | 24 | 942 | 117 | 129 |
| 160 | Sea | 24 | 942 | 100 | 93 |
| 160 | Fishery resources | 24 | 942 | 117 | 103 |
| 163 | Medical Microbiology | 9 | 931 | 1811 | 1219 |
| 164 | pheromones | 13 | 930 | 186 | 110 |
| 165 | Brain | 14 | 886 | 1673 | 1265 |
| 166 | Pharmacology | 15 | 873 | 3449 | 2568 |
| 167 | air | 19 | 872 | 42 | 62 |
| 168 | Morphology | 34 | 861 | 120 | 123 |
| 169 | Sedimentology | 19 | 856 | 139 | 133 |
| 170 | Serology | 7 | 831 | 304 | 62 |
| 171 | exobiology | 11 | 819 | 121 | 92 |
| 172 | Plant physiology | 8 | 798 | 1551 | 1024 |
| 173 | Glaciology | 9 | 789 | 101 | 45 |
| 174 | Algal blooms | 16 | 788 | 79 | 119 |
| 174 | Cyanobacteria | 16 | 788 | 79 | 119 |
| 174 | microalgae | 16 | 788 | 79 | 119 |
| 177 | glaciers | 8 | 777 | 107 | 43 |
| 178 | Genomics | 23 | 773 | 1448 | 1496 |
| 179 | Fishery management | 11 | 764 | 461 | 193 |
| 180 | Geomorphology | 20 | 763 | 507 | 539 |
| 181 | Molecular cloning | 17 | 758 | 568 | 439 |
| 181 | Genetic recombination | 17 | 758 | 553 | 434 |
| 181 | Recombinant DNA | 17 | 758 | 631 | 465 |
| 184 | Sedimentary rocks | 9 | 753 | 319 | 132 |
| 185 | Statistical Mechanics | 16 | 747 | 491 | 189 |
| 185 | Magnetohydrodynamics | 16 | 747 | 143 | 94 |
| 187 | Energy Policy | 10 | 744 | 1630 | 1264 |
| 188 | Fisheries Law | 8 | 731 | 89 | 49 |
| 188 | fisheries management | 8 | 731 | 89 | 49 |
| 188 | Plants | 5 | 731 | 2014 | 1025 |
| 191 | Neurobiology | 11 | 725 | 1263 | 1114 |
| 192 | Conservation Biology | 19 | 724 | 411 | 474 |
| 193 | Physical Chemistry | 24 | 711 | 934 | 1005 |
| 194 | Volcanoes | 13 | 693 | 106 | 78 |
| 195 | Marine Geology | 10 | 683 | 302 | 164 |
| 196 | Biomass Energy | 7 | 681 | 1980 | 1224 |
| 197 | Petroleum Geology | 9 | 676 | 310 | 172 |
| 198 | Surface Chemistry | 12 | 655 | 2465 | 1828 |
| 198 | Colloids | 12 | 655 | 2415 | 1894 |
| 200 | Extreme environments | 9 | 653 | 80 | 38 |
| 201 | Wildlife conservation | 11 | 640 | 680 | 622 |
| 202 | Sustainable Development | 19 | 638 | 675 | 784 |
| 203 | Climate Change Mitigation | 3 | 637 | 37 | 18 |
| 203 | Global warming | 3 | 637 | 125 | 18 |
| 203 | sea level | 3 | 637 | 37 | 18 |
| 206 | Ophthalmology | 17 | 633 | 947 | 831 |
| 206 | Vision | 17 | 633 | 264 | 294 |
| 208 | Perception | 27 | 629 | 753 | 901 |
| 209 | natural disasters | 16 | 616 | 423 | 394 |
| 210 | Computational Biology | 18 | 614 | 1344 | 1379 |
| 211 | Protozoa | 6 | 613 | 304 | 150 |
| 212 | Neurochemistry | 8 | 607 | 1926 | 1364 |
| 212 | Solar System | 11 | 607 | 528 | 426 |
| 214 | Chromosome mapping | 15 | 604 | 935 | 989 |
| 215 | Toxicology | 19 | 601 | 2582 | 2605 |
| 216 | Social behavior | 9 | 600 | 726 | 496 |
| 217 | Spectrum analysis | 23 | 595 | 2200 | 2225 |
| 218 | Nanotechnology | 14 | 592 | 3103 | 2895 |
| 219 | antibiotics | 12 | 589 | 167 | 106 |
| 220 | Visual Perception | 25 | 588 | 696 | 825 |
| 220 | Memory | 25 | 588 | 777 | 949 |
| 220 | Attention | 25 | 588 | 725 | 857 |
| 223 | sustainability | 13 | 586 | 271 | 377 |
| 224 | Industry | 1 | 577 | 519 | 54 |
| 225 | Geodesy | 14 | 568 | 234 | 150 |
| 226 | weather forecasting | 14 | 559 | 70 | 65 |
| 227 | nucleic acids | 2 | 540 | 2582 | 1313 |
| 228 | Paleontology | 19 | 537 | 577 | 486 |
| 229 | Genes | 12 | 505 | 558 | 389 |
| 230 | Coral reef biology | 14 | 486 | 32 | 55 |
| 231 | Cybernetics | 12 | 483 | 662 | 502 |
| 231 | Artificial Intelligence | 12 | 483 | 2285 | 1723 |
| 233 | global environmental change | 9 | 481 | 501 | 518 |
| 234 | DNA polymerases | 1 | 476 | 1011 | 495 |
| 235 | Biogeography | 12 | 474 | 549 | 747 |
| 236 | Mass Spectrometry | 9 | 462 | 832 | 561 |
| 237 | Agricultural Ecology | 9 | 455 | 667 | 692 |
| 238 | energy resources | 5 | 448 | 1184 | 1011 |
| 239 | Acoustics | 13 | 441 | 97 | 9 |
| 240 | Plant Ecology | 6 | 424 | 1515 | 1146 |
| 241 | Birds | 12 | 421 | 702 | 438 |
| 242 | Neurons | 5 | 419 | 705 | 1040 |
| 243 | Psychology | 11 | 415 | 3480 | 2792 |
| 243 | Microscopy | 9 | 415 | 1098 | 585 |
| 245 | Epidemiology | 29 | 412 | 1517 | 2404 |
| 246 | nanoscience | 5 | 402 | 2755 | 1990 |
| 247 | plant molecular biology | 4 | 401 | 1541 | 1232 |
| 248 | United Kingdom | 2 | 397 | 2581 | 1081 |
| 249 | Sound | 22 | 395 | 176 | 134 |
| 249 | Nervous system | 7 | 395 | 2156 | 1909 |
| 251 | Radiation | 23 | 389 | 818 | 981 |
| 252 | Histology | 15 | 387 | 978 | 1214 |
| 253 | Economic Development | 5 | 386 | 1577 | 1034 |
| 254 | Industrial Microbiology | 8 | 379 | 1383 | 1278 |
| 254 | Radio wave propagation | 9 | 379 | 447 | 189 |
| 256 | Robotics | 4 | 378 | 1680 | 757 |
| 257 | Anthropology | 5 | 365 | 1559 | 641 |
| 257 | Archaeology | 16 | 365 | 636 | 571 |
| 257 | Human evolution | 5 | 365 | 371 | 290 |
| 260 | Freeze-Drying | 7 | 360 | 305 | 106 |
| 260 | Hypothermia | 7 | 360 | 305 | 106 |
| 260 | Freeze Drying | 7 | 360 | 305 | 106 |
| 263 | Computer Science | 3 | 359 | 2708 | 674 |
| 264 | Environmental Management | 12 | 355 | 1683 | 2163 |
| 264 | Marine invertebrates | 19 | 355 | 19 | 21 |
| 266 | computer networks | 2 | 354 | 3321 | 1133 |
| 267 | Biomedical Engineering | 8 | 340 | 4118 | 3272 |
| 268 | cell physiology | 10 | 339 | 1036 | 1338 |
| 269 | Genetic variation | 6 | 313 | 73 | 30 |
| 269 | hazard mitigation | 12 | 313 | 336 | 428 |
| 269 | weather | 11 | 313 | 216 | 266 |
| 272 | California | 11 | 308 | 225 | 198 |
| 273 | Geography | 12 | 304 | 1374 | 1335 |
| 274 | biological invasions | 8 | 299 | 364 | 351 |
| 275 | Developmental Genetics | 7 | 283 | 459 | 677 |
| 276 | Nuclear Energy | 4 | 282 | 1182 | 472 |
| 277 | Coastal zone management | 10 | 275 | 310 | 336 |
| 278 | Hydraulic Engineering | 14 | 273 | 427 | 511 |
| 278 | rivers | 2 | 273 | 458 | 133 |
| 280 | Political Geography | 1 | 268 | 545 | 138 |
| 281 | Analytical Biochemistry | 10 | 266 | 1066 | 1147 |
| 282 | Reproduction | 12 | 262 | 1536 | 1713 |
| 283 | Organic Geochemistry | 6 | 261 | 279 | 310 |
| 284 | Japan | 6 | 251 | 1852 | 952 |
| 285 | Magnetic Resonance Spectroscopy | 4 | 246 | 1350 | 740 |
| 285 | Entomology | 8 | 246 | 1861 | 1317 |
| 287 | viruses | 2 | 244 | 2240 | 1536 |
| 288 | Plant cells | 2 | 239 | 1551 | 1446 |
| 289 | Molecular structure | 3 | 236 | 3047 | 1796 |
| 290 | Ichthyology | 7 | 232 | 300 | 127 |
| 291 | Engineering Geology | 5 | 231 | 1244 | 991 |
| 292 | Culture techniques | 12 | 230 | 123 | 169 |
| 293 | Public Policy | 6 | 228 | 1496 | 1241 |
| 294 | Condensed Matter | 2 | 226 | 4327 | 2382 |
| 295 | Solutions | 10 | 220 | 143 | 123 |
| 296 | Landscape Ecology | 2 | 218 | 707 | 379 |
| 297 | Environmental pollutants | 9 | 217 | 1573 | 1912 |
| 297 | Membranes | 6 | 217 | 1582 | 1694 |
| 299 | bioclimatology | 15 | 216 | 293 | 548 |
| 300 | nuclear magnetic resonance | 2 | 214 | 1615 | 750 |
| 301 | Waterways | 7 | 213 | 38 | 22 |
| 301 | Harbors | 7 | 213 | 49 | 24 |
| 303 | Gene expression regulation | 6 | 209 | 858 | 968 |
| 303 | Genetic regulation | 6 | 209 | 1034 | 1307 |
| 305 | Chemical Engineering | 5 | 208 | 4297 | 3808 |
| 306 | Signal Processing | 10 | 207 | 1212 | 1175 |
| 307 | Molecular Microbiology | 2 | 201 | 1308 | 1088 |
| 307 | Geobiology | 11 | 201 | 221 | 359 |
| 309 | Marine resources | 7 | 195 | 429 | 452 |
| 310 | glycoproteins | 3 | 191 | 594 | 429 |
| 310 | Glycoconjugates | 3 | 191 | 594 | 429 |
| 310 | glycolipids | 3 | 191 | 594 | 429 |
| 313 | venom | 3 | 188 | 1065 | 565 |
| 313 | Toxins | 3 | 188 | 1183 | 625 |
| 315 | Therapeutics | 5 | 187 | 1853 | 1917 |
| 316 | Atmospheric Science | 6 | 186 | 138 | 134 |
| 316 | embryonic development | 7 | 186 | 277 | 328 |
| 318 | Proteomics | 2 | 184 | 1787 | 1183 |
| 319 | Landslides | 2 | 182 | 356 | 233 |
| 320 | Pediatrics | 5 | 181 | 2723 | 2804 |
| 321 | Aquaculture | 9 | 179 | 992 | 1141 |
| 322 | mammals | 14 | 175 | 462 | 756 |
| 323 | power plants | 2 | 173 | 9 | 20 |
| 324 | Environmental Geology | 2 | 171 | 2207 | 1308 |
| 325 | Synthetic biology | 6 | 169 | 221 | 259 |
| 326 | enzymes | 11 | 168 | 889 | 1505 |
| 327 | Pediatric Neurology | 1 | 166 | 2087 | 1642 |
| 328 | pollutants | 7 | 162 | 1480 | 1956 |
| 329 | Catalysis | 3 | 161 | 3823 | 3294 |
| 329 | Bacteria | 3 | 161 | 441 | 514 |
| 331 | Host-parasite interactions | 3 | 156 | 1619 | 1860 |
| 332 | Medical Laboratory Science | 6 | 154 | 1840 | 2181 |
| 333 | emergency management | 3 | 152 | 1047 | 670 |
| 334 | Hydrogeology | 5 | 151 | 574 | 493 |
| 334 | Nanostructured Materials | 3 | 151 | 3575 | 2985 |
| 336 | Coastal Engineering | 15 | 149 | 19 | 37 |
| 336 | ports | 4 | 149 | 163 | 127 |
| 338 | China | 9 | 148 | 1973 | 2338 |
| 339 | Marine Biotechnology | 3 | 146 | 266 | 213 |
| 340 | Plant Biotechnology | 1 | 145 | 1588 | 791 |
| 340 | Plant genetic engineering | 1 | 145 | 1777 | 1067 |
| 342 | Oligosaccharide | 2 | 144 | 496 | 398 |
| 342 | Carbohydrates | 2 | 144 | 719 | 502 |
| 344 | Lipids | 1 | 143 | 2675 | 1597 |
| 345 | Trace elements | 3 | 142 | 294 | 287 |
| 346 | Underwater acoustics | 9 | 141 | 13 | 20 |
| 346 | Proteome | 1 | 141 | 2360 | 1484 |
| 348 | Cytogenetics | 6 | 139 | 1477 | 2130 |
| 349 | radiative transfer | 9 | 138 | 369 | 446 |
| 350 | freshwater biology | 6 | 137 | 748 | 834 |
| 351 | Population | 6 | 135 | 832 | 912 |
| 352 | Immunopharmacology | 1 | 132 | 2150 | 1055 |
| 352 | Immunotoxicology | 1 | 132 | 770 | 162 |
| 354 | Surveying | 3 | 131 | 179 | 29 |
| 355 | Korea | 4 | 129 | 325 | 152 |
| 355 | Plant diseases | 3 | 129 | 2318 | 1717 |
| 357 | Remote Sensing | 5 | 127 | 1363 | 998 |
| 358 | Radiobiology | 5 | 126 | 1923 | 1784 |
| 359 | biological monitoring | 7 | 125 | 280 | 501 |
| 360 | Archaea | 2 | 120 | 48 | 44 |
| 361 | Wireless Communication Systems | 4 | 119 | 2039 | 1503 |
| 361 | Medical innovations | 3 | 119 | 1366 | 2044 |
| 363 | plant communities | 1 | 118 | 1921 | 1365 |
| 364 | Plate Tectonics | 7 | 116 | 147 | 220 |
| 364 | drug therapy | 3 | 116 | 3148 | 2828 |
| 366 | biomimicry | 2 | 115 | 218 | 150 |
| 367 | Freshwater Ecology | 5 | 114 | 185 | 106 |
| 367 | Soil Science | 2 | 114 | 2589 | 1975 |
| 367 | Aquatic animals | 5 | 114 | 141 | 138 |
| 370 | genome | 4 | 113 | 1828 | 2466 |
| 371 | calcification | 2 | 112 | 854 | 732 |
| 371 | human behavior | 4 | 112 | 2653 | 3497 |
| 371 | Classification | 1 | 112 | 644 | 218 |
| 374 | Mechanics | 5 | 110 | 1211 | 972 |
| 375 | Ornithology | 2 | 109 | 1415 | 799 |
| 375 | Materials | 5 | 109 | 5662 | 5881 |
| 375 | Cognition | 3 | 109 | 2006 | 1866 |
| 378 | Stem cells | 2 | 108 | 2434 | 2107 |
| 379 | Biomass | 3 | 107 | 747 | 955 |
| 379 | Water chemistry | 9 | 107 | 77 | 229 |
| 381 | environmental indicators | 4 | 106 | 1145 | 1487 |
| 381 | Developmental Immunology | 3 | 106 | 1012 | 955 |
| 381 | Australia | 5 | 106 | 1859 | 1715 |
| 384 | animals | 7 | 105 | 969 | 1066 |
| 385 | Medical Technology | 5 | 104 | 1775 | 2103 |
| 385 | Greenhouse gases | 2 | 104 | 503 | 464 |
| 385 | Biotelemetry | 7 | 104 | 28 | 74 |
| 385 | biofuels | 1 | 104 | 636 | 571 |
| 389 | actuators | 1 | 103 | 3718 | 2591 |
| 389 | shellfish | 6 | 103 | 109 | 128 |
| 389 | transducers | 1 | 103 | 3718 | 2591 |
| 392 | Molecular Pharmacology | 1 | 101 | 1591 | 1191 |
| 393 | Neural circuitry | 3 | 100 | 2268 | 2222 |
| 393 | Cytoskeleton | 4 | 100 | 272 | 358 |
| 393 | Sites | 3 | 100 | 651 | 772 |
| 396 | Environmental Science | 3 | 98 | 8 | 13 |
| 396 | Developmental Psychology | 1 | 98 | 1957 | 1264 |
| 396 | Child | 1 | 98 | 4987 | 2736 |
| 396 | Child Development | 1 | 98 | 3730 | 2393 |
| 396 | Child psychology | 1 | 98 | 2906 | 1946 |
| 396 | behavior modification | 1 | 98 | 722 | 567 |
| 396 | child behavior | 1 | 98 | 790 | 519 |
| 396 | children | 1 | 98 | 1142 | 594 |
| 404 | cell movement | 3 | 94 | 265 | 364 |
| 405 | Structural dynamics | 4 | 92 | 1032 | 1306 |
| 405 | air quality management | 2 | 92 | 842 | 675 |
| 405 | indoor air pollution | 2 | 92 | 604 | 498 |
| 405 | Ventilation | 2 | 92 | 816 | 581 |
| 405 | Sick building syndrome | 2 | 92 | 604 | 498 |
| 410 | Biodegradation | 3 | 86 | 855 | 1021 |
| 410 | Water Microbiology | 3 | 86 | 542 | 604 |
| 410 | Fouling | 3 | 86 | 268 | 379 |
| 413 | Ecological Genetics | 5 | 85 | 543 | 610 |
| 413 | occupational diseases | 4 | 85 | 996 | 1328 |
| 413 | Bioinformatics | 3 | 85 | 2657 | 2714 |
| 416 | Parasitology | 11 | 84 | 1572 | 2763 |
| 417 | Maritime Law | 4 | 83 | 73 | 28 |
| 417 | Marine Conservation | 4 | 83 | 60 | 24 |
| 417 | Law of the Sea | 4 | 83 | 60 | 24 |
| 420 | Bioinorganic chemistry | 1 | 82 | 2514 | 1661 |
| 421 | Solid State Physics | 3 | 81 | 4238 | 3722 |
| 421 | wind erosion | 2 | 81 | 159 | 171 |
| 423 | Behavioral Genetics | 1 | 79 | 521 | 411 |
| 423 | Fire ecology | 1 | 79 | 168 | 103 |
| 423 | Diet | 3 | 79 | 2777 | 3289 |
| 426 | Immunity | 2 | 78 | 2899 | 3386 |
| 427 | Oxidative stress | 1 | 77 | 2308 | 1952 |
| 427 | Cellular senescence | 1 | 77 | 1571 | 1279 |
| 427 | Biocompatible Materials | 5 | 77 | 3615 | 5208 |
| 430 | Earthquake Engineering | 5 | 76 | 1098 | 1496 |
| 431 | Marine biodiversity | 7 | 72 | 167 | 200 |
| 432 | Pharmacogenetics | 1 | 71 | 2265 | 1777 |
| 432 | Genetic therapy | 1 | 71 | 2533 | 2077 |
| 434 | Physical organic chemistry | 4 | 70 | 1419 | 1636 |
| 435 | Ceramic materials | 1 | 67 | 2455 | 1614 |
| 436 | Agricultural Chemistry | 5 | 66 | 2273 | 3113 |
| 436 | Biomolecules | 1 | 66 | 996 | 883 |
| 436 | Structure-activity relationship | 1 | 66 | 1012 | 520 |
| 436 | Thorax | 1 | 66 | 1080 | 924 |
| 440 | Obesity | 2 | 65 | 3093 | 3342 |
| 440 | protein | 3 | 65 | 1573 | 1759 |
| 440 | Physical fitness | 2 | 65 | 1550 | 1448 |
| 440 | proteins | 3 | 65 | 2724 | 2969 |
| 444 | Photography | 23 | 64 | 706 | 787 |
| 445 | Mathematical Physics | 4 | 63 | 3189 | 2771 |
| 445 | Radioisotopes | 3 | 63 | 1589 | 1314 |
| 447 | Metallurgy | 2 | 62 | 3501 | 2839 |
| 447 | Invertebrates | 5 | 62 | 542 | 860 |
| 447 | Metals | 2 | 62 | 3146 | 2758 |
| 450 | Critical Care | 1 | 61 | 3277 | 3021 |
| 450 | Critical Care Medicine | 1 | 61 | 2942 | 2896 |
| 450 | Parasitic Diseases | 8 | 61 | 1651 | 3141 |
| 453 | Chromosomes | 1 | 58 | 1959 | 1659 |
| 454 | Soil biology | 1 | 57 | 1615 | 1606 |
| 455 | Health Policy | 4 | 56 | 2686 | 3575 |
| 455 | Wetland ecology | 4 | 56 | 420 | 661 |
| 457 | toxicity testing | 2 | 55 | 1186 | 1274 |
| 457 | Navigation | 5 | 55 | 357 | 417 |
| 459 | Cardiovascular system | 1 | 54 | 3011 | 3050 |
| 459 | Steroids | 1 | 54 | 1994 | 1615 |
| 461 | Geotechnical Engineering | 1 | 53 | 1052 | 688 |
| 461 | Bioacoustics | 5 | 53 | 50 | 116 |
| 461 | soil conservation | 1 | 53 | 1603 | 1248 |
| 461 | soil pollution | 1 | 53 | 1257 | 823 |
| 465 | Ecophysiology | 1 | 52 | 587 | 379 |
| 465 | Solar Energy | 2 | 52 | 2418 | 2751 |
| 465 | Image Processing | 4 | 52 | 2051 | 2774 |
| 465 | health services accessibility | 4 | 52 | 1016 | 1428 |
| 465 | Mollusks | 3 | 52 | 257 | 205 |
| 470 | dietary supplements | 1 | 51 | 1659 | 1406 |
| 471 | Social Sciences | 3 | 49 | 4669 | 3991 |
| 471 | Turbulence | 4 | 49 | 213 | 312 |
| 471 | visualization | 8 | 49 | 1159 | 1293 |
| 471 | Developing countries | 2 | 49 | 3749 | 3455 |
| 475 | Information Technology | 1 | 48 | 4887 | 3031 |
| 475 | Chromatography | 1 | 48 | 3141 | 2453 |
| 475 | Chromatographic analysis | 1 | 48 | 3573 | 2633 |
| 475 | mathematical analysis | 1 | 48 | 3639 | 2269 |
| 479 | Sociology | 1 | 47 | 5963 | 4273 |
| 479 | Geothermal Energy | 3 | 47 | 282 | 427 |
| 479 | Medical Anthropology | 1 | 47 | 2621 | 2627 |
| 479 | Groundwater | 3 | 47 | 848 | 1016 |
| 479 | Oligosaccharides | 1 | 47 | 589 | 508 |
| 479 | Insects | 6 | 47 | 1284 | 1893 |
| 479 | Behavior | 5 | 47 | 3226 | 5601 |
| 486 | Renewable Energy Sources | 2 | 45 | 3607 | 4699 |
| 487 | Microbial Biotechnology | 2 | 44 | 1499 | 1757 |
| 488 | Materials Science | 3 | 43 | 5588 | 6207 |
| 488 | clay | 1 | 43 | 1530 | 1584 |
| 488 | Chemical analysis | 2 | 43 | 1779 | 2012 |
| 488 | clay minerals | 1 | 43 | 590 | 552 |
| 492 | Information Systems | 1 | 42 | 3096 | 2397 |
| 492 | Cosmology | 1 | 42 | 2297 | 1490 |
| 492 | Polymers | 3 | 42 | 5192 | 5874 |
| 492 | nuclear astrophysics | 1 | 42 | 892 | 760 |
| 496 | Signal Transduction | 3 | 41 | 1793 | 2715 |
| 496 | aerosol | 3 | 41 | 495 | 652 |
| 498 | Contraception | 2 | 40 | 1006 | 1228 |
| 498 | Reproductive health | 2 | 40 | 1266 | 1463 |
| 498 | Mitochondrial DNA | 4 | 40 | 162 | 167 |
| 498 | Minerals | 2 | 40 | 1170 | 1342 |
| 498 | Birth control | 2 | 40 | 715 | 959 |
| 503 | Green Chemistry | 2 | 39 | 2277 | 3065 |
| 503 | Sustainable Engineering | 2 | 39 | 2284 | 2813 |
| 503 | Fertilization | 1 | 39 | 174 | 168 |
| 503 | gametes | 1 | 39 | 174 | 168 |
| 503 | Primates | 1 | 39 | 1446 | 1196 |
| 508 | Electronics | 4 | 38 | 3816 | 4273 |
| 509 | Ecological Engineering | 2 | 37 | 953 | 1504 |
| 509 | Ocean-atmosphere interaction | 2 | 37 | 143 | 80 |
| 509 | wetland management | 2 | 37 | 275 | 392 |
| 512 | Africa | 2 | 36 | 2460 | 2066 |
| 512 | Middle East | 2 | 36 | 1466 | 1160 |
| 514 | Engineering Mathematics | 3 | 35 | 3057 | 3053 |
| 514 | Optical materials | 1 | 35 | 4044 | 4067 |
| 516 | biological agents | 3 | 33 | 761 | 483 |
| 516 | Synapses | 1 | 33 | 624 | 676 |
| 518 | vibration | 2 | 32 | 1757 | 1929 |
| 518 | nuclear magnetic resonance spectroscopy | 2 | 32 | 1135 | 1170 |
| 518 | oceans | 1 | 32 | 30 | 12 |
| 518 | ocean temperature | 1 | 32 | 31 | 12 |
| 518 | Cheminformatics | 1 | 32 | 789 | 850 |
| 518 | NMR | 2 | 32 | 829 | 845 |
| 518 | Informatics | 1 | 32 | 1743 | 1641 |
| 518 | magnetic resonance | 2 | 32 | 870 | 872 |
| 526 | Composite Materials | 2 | 31 | 3581 | 4393 |
| 526 | Moon | 2 | 31 | 288 | 282 |
| 526 | Luminescence | 2 | 31 | 1878 | 2049 |
| 526 | bioluminescence | 2 | 31 | 552 | 539 |
| 526 | radar | 1 | 31 | 484 | 383 |
| 526 | Sonar | 1 | 31 | 428 | 337 |
| 526 | Isotopes | 1 | 31 | 322 | 201 |
| 533 | Medical Physics | 1 | 30 | 3123 | 2730 |
| 533 | Electrochemistry | 1 | 30 | 5741 | 5121 |
| 533 | Electrochemical Analysis | 1 | 30 | 2610 | 2481 |
| 533 | body temperature | 2 | 30 | 722 | 1009 |
| 533 | extraterrestrial environment | 3 | 30 | 761 | 1073 |
| 538 | Applied Sciences | 1 | 29 | 51 | 121 |
| 538 | Numerical Analysis | 3 | 29 | 2667 | 3087 |
| 538 | Applied Mechanics | 1 | 29 | 51 | 121 |
| 538 | Dynamics | 2 | 29 | 2562 | 2453 |
| 538 | Combustion | 2 | 29 | 1718 | 2113 |
| 543 | Immunopathology | 1 | 28 | 2669 | 2831 |
| 544 | Humanities | 1 | 27 | 3877 | 2276 |
| 544 | Tourism | 2 | 27 | 2162 | 2799 |
| 544 | Quantum theory | 1 | 27 | 1697 | 1478 |
| 544 | Radiation effects | 2 | 27 | 949 | 1489 |
| 544 | Marine algae | 2 | 27 | 193 | 290 |
| 549 | Palynology | 1 | 26 | 568 | 477 |
| 550 | Biological Systems | 1 | 25 | 1696 | 1575 |
| 550 | Biofilms | 1 | 25 | 383 | 573 |
| 550 | Plant breeding | 4 | 25 | 872 | 1723 |
| 550 | eugenics | 4 | 25 | 613 | 1436 |
| 550 | Breeding | 4 | 25 | 1260 | 2353 |
| 555 | Audiology | 1 | 24 | 1535 | 1560 |
| 555 | Biomechanics | 3 | 24 | 1829 | 2916 |
| 555 | Cell death | 1 | 24 | 2231 | 2801 |
| 555 | Cancer | 1 | 24 | 6448 | 6845 |
| 559 | Soil Mechanics | 2 | 23 | 1553 | 1915 |
| 559 | Mobile Computing | 1 | 23 | 2283 | 1769 |
| 559 | Hydraulics | 1 | 23 | 8 | 29 |
| 559 | pressure | 1 | 23 | 8 | 29 |
| 559 | Fluid flow | 1 | 23 | 8 | 29 |
| 559 | Chemical properties | 1 | 23 | 8 | 29 |
| 559 | Parasites | 2 | 23 | 2393 | 3132 |
| 559 | drugs | 2 | 23 | 3427 | 4518 |
| 567 | Endocrinology | 1 | 22 | 5665 | 6062 |
| 567 | Ergonomics | 1 | 22 | 2128 | 1928 |
| 567 | Bioenergetics | 1 | 22 | 1728 | 1928 |
| 567 | Technology Assessment | 2 | 22 | 522 | 1158 |
| 567 | Energy metabolism | 1 | 22 | 1230 | 1348 |
| 567 | Microcirculation | 2 | 22 | 760 | 1201 |
| 567 | Multiphase Flow | 1 | 22 | 730 | 849 |
| 567 | Crystallography | 2 | 22 | 2388 | 2190 |
| 567 | X-ray crystallography | 2 | 22 | 893 | 1037 |
| 567 | Blood vessels | 2 | 22 | 614 | 998 |
| 567 | Dementia | 3 | 22 | 1815 | 2131 |
| 567 | drug development | 2 | 22 | 1727 | 3006 |
| 567 | Alzheimer's disease | 3 | 22 | 1860 | 2261 |
| 567 | Prospecting | 2 | 22 | 146 | 196 |
| 581 | Energy Conversion | 1 | 21 | 2049 | 2434 |
| 581 | Energy Storage | 1 | 21 | 2210 | 2292 |
| 581 | fuel cells | 1 | 21 | 2117 | 2417 |
| 581 | Photobiology | 2 | 21 | 2082 | 2905 |
| 581 | System analysis | 3 | 21 | 2980 | 4353 |
| 586 | Micropaleontology | 4 | 20 | 85 | 249 |
| 586 | Control Theory | 1 | 20 | 2861 | 2542 |
| 586 | Foraminifera | 2 | 20 | 126 | 222 |
| 586 | inscriptions | 2 | 20 | 94 | 77 |
| 590 | Ethnoarchaeology | 1 | 19 | 382 | 457 |
| 590 | Wetland conservation | 2 | 19 | 496 | 864 |
| 590 | coastal areas | 2 | 19 | 110 | 170 |
| 590 | Antarctica | 3 | 19 | 670 | 1042 |
| 590 | coastal archaeology | 2 | 19 | 110 | 170 |
| 590 | islands | 2 | 19 | 110 | 170 |
| 590 | Wetlands | 2 | 19 | 509 | 866 |
| 597 | Histochemistry | 2 | 18 | 1691 | 2402 |
| 597 | Paleobiology | 1 | 18 | 739 | 650 |
| 597 | Water quality management | 3 | 18 | 2231 | 3685 |
| 597 | air quality | 1 | 18 | 653 | 755 |
| 601 | Nutrition | 3 | 17 | 5555 | 8637 |
| 601 | Health Services Research | 1 | 17 | 3704 | 4045 |
| 601 | Primary health care | 1 | 17 | 3823 | 4194 |
| 601 | Latin America | 3 | 17 | 1620 | 1710 |
| 601 | Porous materials | 2 | 17 | 1095 | 1508 |
| 606 | Algorithms | 1 | 16 | 1412 | 1330 |
| 606 | Soil dynamics | 1 | 16 | 871 | 1085 |
| 606 | Gene expression | 1 | 16 | 647 | 845 |
| 606 | Cell division | 1 | 16 | 1251 | 1644 |
| 606 | disease outbreaks | 1 | 16 | 1248 | 1708 |
| 606 | Epidemics | 1 | 16 | 1171 | 1674 |
| 612 | Watershed management | 1 | 15 | 572 | 605 |
| 612 | Radio | 4 | 15 | 835 | 1383 |
| 612 | cell interaction | 1 | 15 | 2344 | 2961 |
| 615 | Systems Engineering | 1 | 14 | 3990 | 3843 |
| 615 | Underwater Archaeology | 3 | 14 | 136 | 214 |
| 615 | Computer Vision | 1 | 14 | 2201 | 2672 |
| 615 | Quantum Gravity | 1 | 14 | 2785 | 2877 |
| 615 | Cognitive neuroscience | 1 | 14 | 1756 | 2203 |
| 615 | Earthquake prediction | 1 | 14 | 132 | 102 |
| 615 | Societies | 2 | 14 | 251 | 340 |
| 615 | Europe | 5 | 14 | 3324 | 6377 |
| 623 | Waste management | 1 | 13 | 2716 | 3166 |
| 623 | Water Purification | 1 | 13 | 2184 | 2623 |
| 623 | Urbanization | 1 | 13 | 612 | 611 |
| 623 | Air pollution | 1 | 13 | 48 | 88 |
| 623 | Urban climatology | 1 | 13 | 48 | 88 |
| 623 | management | 2 | 13 | 4700 | 6346 |
| 623 | libraries | 3 | 13 | 929 | 1085 |
| 623 | DNA | 2 | 13 | 975 | 1738 |
| 623 | Cell communication | 1 | 13 | 1724 | 2371 |
| 632 | Psychiatry | 2 | 12 | 6456 | 8796 |
| 632 | Internet of Things | 1 | 12 | 1240 | 1554 |
| 632 | Educational Psychology | 1 | 12 | 2566 | 2953 |
| 632 | Measurement | 1 | 12 | 2501 | 3012 |
| 632 | Nanostructures | 1 | 12 | 4023 | 4727 |
| 632 | Environmental risk assessment | 1 | 12 | 996 | 1297 |
| 632 | environmental control | 1 | 12 | 563 | 827 |
| 632 | internet | 1 | 12 | 2476 | 2731 |
| 640 | Environmental Archaeology | 1 | 11 | 203 | 262 |
| 640 | Drug design | 1 | 11 | 3440 | 4174 |
| 640 | Learning | 2 | 11 | 2000 | 3191 |
| 643 | Nondestructive testing | 1 | 10 | 1370 | 1651 |
| 643 | Stochastic Processes | 1 | 10 | 1798 | 1998 |
| 643 | Geographic information systems | 1 | 10 | 2254 | 2671 |
| 643 | Bioremediation | 1 | 10 | 1807 | 2501 |
| 643 | Organometallic chemistry | 3 | 10 | 2305 | 3735 |
| 643 | Community Archaeology | 1 | 10 | 50 | 44 |
| 643 | Quantum Optics | 2 | 10 | 1285 | 1866 |
| 643 | environmental remediation | 1 | 10 | 854 | 1256 |
| 643 | Organometallic compounds | 3 | 10 | 1450 | 2583 |
| 643 | Paleobotany | 2 | 10 | 239 | 570 |
| 643 | Vegetation dynamics | 2 | 10 | 229 | 552 |
| 643 | Atomic spectroscopy | 2 | 10 | 1642 | 2434 |
| 643 | Laser Spectroscopy | 2 | 10 | 1217 | 1773 |
| 656 | Geriatrics | 2 | 9 | 4652 | 6495 |
| 656 | Human genetics | 1 | 9 | 4076 | 5512 |
| 656 | Rock Mechanics | 1 | 9 | 1600 | 1936 |
| 656 | sedimentary basins | 1 | 9 | 416 | 637 |
| 656 | Wireless Communication | 1 | 9 | 959 | 1167 |
| 656 | Adaptive control systems | 1 | 9 | 1145 | 1402 |
| 662 | Plant Taxonomy | 2 | 8 | 634 | 1033 |
| 662 | Pacific Islands | 1 | 8 | 808 | 1078 |
| 662 | health planning | 1 | 8 | 4267 | 5408 |
| 662 | Information Science | 1 | 8 | 4777 | 5763 |
| 666 | Occupational Health | 1 | 7 | 2586 | 3040 |
| 666 | Ceramics | 1 | 7 | 2726 | 3275 |
| 666 | Natural resources | 1 | 7 | 1551 | 2147 |
| 666 | industrial hygiene | 1 | 7 | 2614 | 2911 |
| 666 | Hydrodynamics | 1 | 7 | 1067 | 1604 |
| 666 | Marine mineral resources | 1 | 7 | 347 | 503 |
| 666 | Microbiota | 1 | 7 | 182 | 426 |
| 666 | Glass | 1 | 7 | 2063 | 2746 |
| 666 | pottery | 1 | 7 | 1987 | 2662 |
| 666 | Seabed | 1 | 7 | 347 | 503 |
| 666 | synthesis | 1 | 7 | 1950 | 2352 |
| 666 | silicon | 1 | 7 | 883 | 1136 |
| 678 | Chronobiology | 1 | 6 | 941 | 1399 |
| 678 | Global Health | 1 | 6 | 2576 | 3564 |
| 678 | Mechatronics | 1 | 6 | 1462 | 2036 |
| 678 | Sleep Disorders | 1 | 6 | 3312 | 3935 |
| 678 | Circadian rhythms | 1 | 6 | 684 | 1159 |
| 678 | biological clocks | 1 | 6 | 941 | 1399 |
| 678 | Photogrammetry | 2 | 6 | 1361 | 1653 |
| 678 | preventive medicine | 1 | 6 | 2922 | 4173 |
| 678 | zoos | 2 | 6 | 134 | 319 |
| 678 | circadian rhythm | 1 | 6 | 941 | 1399 |
| 678 | biological rhythms | 1 | 6 | 898 | 1357 |
| 678 | heredity | 1 | 6 | 1521 | 2127 |
| 678 | Sleep | 2 | 6 | 2616 | 3950 |
| 691 | Pharmacy | 1 | 5 | 4217 | 5612 |
| 691 | Pharmaceutical Technology | 1 | 5 | 2812 | 3947 |
| 691 | Pharmacokinetics | 1 | 5 | 2087 | 2951 |
| 691 | Restoration Ecology | 1 | 5 | 980 | 1497 |
| 691 | Rock deformation | 1 | 5 | 454 | 775 |
| 691 | water resources | 2 | 5 | 328 | 633 |
| 691 | particles | 1 | 5 | 2000 | 2837 |
| 691 | Telecommunication | 1 | 5 | 4175 | 4768 |
| 691 | aquatic insects | 1 | 5 | 215 | 299 |
| 691 | Granular materials | 1 | 5 | 1207 | 1927 |
| 691 | Fish | 1 | 5 | 809 | 1144 |
| 702 | Marine Engineering | 2 | 4 | 433 | 776 |
| 702 | Aerospace Engineering | 1 | 4 | 756 | 1062 |
| 702 | Comparative Psychology | 1 | 4 | 303 | 546 |
| 702 | Forest Ecology | 1 | 4 | 1940 | 2863 |
| 702 | Crystallization | 1 | 4 | 1095 | 1452 |
| 702 | Technological Innovations | 1 | 4 | 2124 | 3180 |
| 702 | Ultrasonics | 2 | 4 | 1570 | 3152 |
| 702 | Ferroelectricity | 2 | 4 | 1304 | 1959 |
| 702 | Entropy | 1 | 4 | 2199 | 3032 |
| 702 | Animal welfare | 1 | 4 | 757 | 1259 |
| 702 | Probiotics | 1 | 4 | 491 | 996 |
| 702 | Wind power | 1 | 4 | 683 | 1078 |
| 702 | radioactive waste | 1 | 4 | 1615 | 2711 |
| 702 | industrial waste | 1 | 4 | 1666 | 2736 |
| 702 | Hazardous waste | 1 | 4 | 1861 | 3005 |
| 702 | Ultrasound | 2 | 4 | 837 | 1852 |
| 702 | Radio frequency | 2 | 4 | 509 | 1083 |
| 719 | Civil Engineering | 3 | 3 | 2137 | 3985 |
| 719 | Helminthology | 1 | 3 | 372 | 615 |
| 719 | Library Science | 1 | 3 | 2703 | 3038 |
| 719 | environmental exposure | 1 | 3 | 3904 | 5709 |
| 719 | Helminths | 1 | 3 | 372 | 615 |
| 719 | Culture | 1 | 3 | 2126 | 2789 |
| 719 | astronomical phenomena | 2 | 3 | 866 | 1817 |
| 726 | Petroleum Engineering | 1 | 2 | 1434 | 2159 |
| 726 | Economic History | 2 | 2 | 5131 | 7581 |
| 726 | Human Geography | 2 | 2 | 1558 | 3043 |
| 726 | Photonics | 21 | 2 | 710 | 4170 |
| 726 | Electromagnetism | 1 | 2 | 1462 | 2121 |
| 726 | Mental Disorders | 1 | 2 | 5863 | 8014 |
| 726 | Research Design | 1 | 2 | 2751 | 4397 |
| 726 | Bifurcation Theory | 1 | 2 | 1257 | 1778 |
| 726 | economic policy | 2 | 2 | 3554 | 5651 |
| 726 | Electromagnetic waves | 1 | 2 | 517 | 931 |
| 726 | ethnobiology | 1 | 2 | 566 | 1062 |
| 726 | Liposomes | 1 | 2 | 1150 | 1908 |
| 726 | Radio waves | 1 | 2 | 656 | 1001 |
| 726 | Lipid bilayers | 1 | 2 | 915 | 1470 |
| 726 | Microwaves | 1 | 2 | 1965 | 2538 |
| 726 | polymerization | 2 | 2 | 4999 | 7670 |
| 742 | History | 2 | 1 | 1615 | 1872 |
| 742 | Physical Geography | 2 | 1 | 840 | 1853 |
| 742 | Environmental Education | 1 | 1 | 798 | 1418 |
| 742 | Urban Geography | 1 | 1 | 467 | 854 |
| 742 | Psychometrics | 1 | 1 | 815 | 1343 |
| 742 | Functional Genomics | 1 | 1 | 714 | 1345 |
| 742 | Diabetes mellitus | 1 | 1 | 4124 | 6111 |
| 742 | Laser-plasma interactions | 1 | 1 | 185 | 300 |
| 742 | Herpetology | 3 | 1 | 400 | 1200 |
| 742 | Plasma density | 1 | 1 | 185 | 300 |
| 742 | Mountains | 2 | 1 | 642 | 1567 |
| 742 | Amphibians | 3 | 1 | 348 | 1073 |
| 742 | Diabetes | 1 | 1 | 4209 | 6176 |
| 755 | Education | 4 | 0 | 4294 | 10095 |
| 755 | Statistics | 2 | 0 | 3813 | 6579 |
| 755 | Systems Analysis | 1 | 0 | 2233 | 3757 |
| 755 | infrared radiation | 1 | 0 | 1286 | 2109 |
| 755 | Politics | 1 | 0 | 1390 | 1824 |
| 755 | Biometrics | 1 | 0 | 2136 | 3289 |
| 755 | nuclear power | 1 | 0 | 1052 | 1602 |
| 755 | Quality of life | 1 | 0 | 3137 | 5170 |
| 755 | Tropical Medicine | 1 | 0 | 3777 | 5783 |
| 755 | government | 1 | 0 | 1476 | 2053 |
| 755 | Imaging systems | 1 | 0 | 1680 | 2836 |
| 755 | rehabilitation | 1 | 0 | 4377 | 6693 |
