| 1 | Environment | 494 | 27.9K | 115 | 188 |
| 2 | Chemical Engineering | 473 | 24.2K | 187 | 157 |
| 3 | Biomass Energy | 295 | 20.5K | 24 | 25 |
| 4 | Chemistry | 411 | 19.7K | 857 | 769 |
| 5 | Ecology | 578 | 18.6K | 234 | 414 |
| 6 | Environmental Management | 433 | 18.2K | 5 | 8 |
| 7 | Biochemical Engineering | 353 | 18.2K | 87 | 153 |
| 8 | Pollution | 349 | 17.6K | 237 | 286 |
| 9 | Science | 369 | 15.3K | 675 | 851 |
| 10 | Green Chemistry | 191 | 14.9K | 38 | 18 |
| 11 | Botany | 422 | 14.0K | 168 | 262 |
| 12 | Materials | 181 | 14.0K | 799 | 475 |
| 13 | Mycology | 188 | 12.4K | 38 | 12 |
| 14 | Biochemistry | 418 | 11.6K | 776 | 851 |
| 15 | Fungi | 155 | 11.6K | 13 | 5 |
| 16 | Environmental Health | 277 | 9.9K | 260 | 362 |
| 17 | Molecular Biology | 349 | 9.9K | 635 | 808 |
| 18 | Biology | 150 | 9.8K | 1103 | 1045 |
| 19 | China | 630 | 9.8K | 37 | 46 |
| 20 | environmental pollution | 282 | 9.3K | 165 | 255 |
| 21 | Research | 311 | 8.7K | 651 | 702 |
| 22 | Biotechnology | 209 | 8.4K | 479 | 563 |
| 23 | Sustainable Engineering | 132 | 8.4K | 40 | 24 |
| 24 | Biocompatible Materials | 78 | 8.4K | 696 | 398 |
| 25 | Physics | 96 | 8.1K | 1843 | 1301 |
| 26 | Materials Science | 75 | 8.0K | 892 | 424 |
| 27 | Medicine | 282 | 7.8K | 840 | 976 |
| 28 | environmental indicators | 222 | 7.5K | 3 | 5 |
| 29 | Biophysics | 231 | 7.1K | 579 | 591 |
| 30 | Catalysis | 119 | 7.0K | 600 | 469 |
| 31 | Water | 113 | 6.6K | 227 | 227 |
| 32 | Nanotechnology | 123 | 6.5K | 744 | 655 |
| 33 | Environmental Engineering | 167 | 6.3K | 212 | 311 |
| 34 | Plant physiology | 216 | 6.2K | 60 | 177 |
| 35 | Water pollution | 121 | 6.0K | 207 | 208 |
| 36 | Forest Ecology | 206 | 5.9K | 17 | 38 |
| 37 | Hydrology | 176 | 5.7K | 116 | 145 |
| 38 | Soil Science | 175 | 5.5K | 74 | 98 |
| 39 | Environmental Policy | 176 | 5.4K | 124 | 267 |
| 40 | Agricultural Chemistry | 84 | 5.1K | 234 | 129 |
| 41 | Plants | 180 | 5.1K | 71 | 223 |
| 42 | Forest Management | 178 | 5.0K | 23 | 45 |
| 43 | Genomics | 149 | 4.7K | 209 | 263 |
| 44 | Environmental monitoring | 114 | 4.7K | 318 | 357 |
| 45 | Polymers | 147 | 4.6K | 620 | 566 |
| 46 | Geomorphology | 135 | 4.6K | 31 | 66 |
| 47 | Plant cells | 80 | 4.5K | 132 | 246 |
| 48 | plant molecular biology | 133 | 4.4K | 85 | 226 |
| 49 | Environmental Geology | 139 | 4.3K | 21 | 41 |
| 50 | Composite Materials | 87 | 4.2K | 385 | 338 |
| 51 | Microbiology | 163 | 3.9K | 753 | 1065 |
| 52 | Biodiversity conservation | 70 | 3.8K | 186 | 320 |
| 53 | polymerization | 111 | 3.5K | 607 | 556 |
| 54 | Natural history | 23 | 3.5K | 1027 | 1085 |
| 55 | Plant Ecology | 162 | 3.4K | 65 | 224 |
| 56 | Colloids | 103 | 3.4K | 586 | 632 |
| 57 | nanoscience | 48 | 3.3K | 642 | 493 |
| 58 | sanitation | 47 | 3.3K | 274 | 299 |
| 59 | Climate change | 26 | 3.2K | 259 | 296 |
| 59 | Eutrophication | 26 | 3.2K | 254 | 294 |
| 61 | Cellulose | 73 | 3.2K | 25 | 22 |
| 62 | environmental protection | 79 | 2.9K | 390 | 422 |
| 63 | Optical materials | 32 | 2.9K | 775 | 417 |
| 64 | wood | 157 | 2.9K | 8 | 9 |
| 65 | Land use | 74 | 2.6K | 40 | 44 |
| 66 | Food | 95 | 2.5K | 297 | 423 |
| 67 | Plant genetic engineering | 47 | 2.4K | 88 | 88 |
| 68 | Surface Chemistry | 84 | 2.4K | 697 | 760 |
| 69 | Bioengineering | 78 | 2.2K | 679 | 933 |
| 70 | Toxicology | 36 | 2.1K | 1279 | 893 |
| 71 | soil microbiology | 72 | 2.1K | 140 | 320 |
| 72 | Building Materials | 71 | 2.0K | 223 | 351 |
| 73 | Plant Biotechnology | 56 | 2.0K | 45 | 56 |
| 74 | food technology | 81 | 2.0K | 290 | 377 |
| 75 | Environmental Chemistry | 16 | 2.0K | 734 | 412 |
| 76 | Energy Conversion | 8 | 1.9K | 724 | 343 |
| 77 | biofuels | 25 | 1.9K | 29 | 24 |
| 78 | Environmental Toxicology | 32 | 1.9K | 531 | 382 |
| 79 | gene mapping | 63 | 1.9K | 231 | 366 |
| 80 | Industrial Engineering | 44 | 1.9K | 314 | 244 |
| 81 | Chromosome mapping | 61 | 1.8K | 195 | 292 |
| 82 | Horticulture | 47 | 1.7K | 57 | 27 |
| 83 | Geography | 48 | 1.7K | 397 | 362 |
| 84 | Genetics | 55 | 1.7K | 687 | 883 |
| 85 | Environmental pollutants | 23 | 1.7K | 634 | 325 |
| 86 | Technology | 48 | 1.7K | 820 | 653 |
| 87 | plant communities | 51 | 1.7K | 144 | 252 |
| 88 | biological evolution | 40 | 1.7K | 479 | 567 |
| 89 | environmental exposure | 23 | 1.6K | 496 | 227 |
| 90 | pollutants | 22 | 1.6K | 517 | 282 |
| 91 | Membranes | 27 | 1.6K | 540 | 440 |
| 92 | Plant diseases | 102 | 1.6K | 177 | 303 |
| 93 | soil conservation | 67 | 1.6K | 14 | 20 |
| 94 | Renewable Energy Sources | 36 | 1.6K | 581 | 837 |
| 95 | Geophysics | 47 | 1.6K | 866 | 806 |
| 96 | Energy Policy | 28 | 1.5K | 783 | 686 |
| 97 | Analytical Chemistry | 40 | 1.5K | 1312 | 1134 |
| 97 | Bioremediation | 40 | 1.5K | 24 | 28 |
| 99 | Biodegradation | 36 | 1.5K | 28 | 31 |
| 100 | Nanostructured Materials | 43 | 1.4K | 849 | 851 |
| 101 | energy conservation | 25 | 1.4K | 538 | 533 |
| 102 | Hazardous waste | 22 | 1.4K | 157 | 143 |
| 103 | Biodiversity | 56 | 1.4K | 312 | 471 |
| 104 | Soil biology | 34 | 1.4K | 186 | 263 |
| 105 | land degradation | 55 | 1.4K | 9 | 15 |
| 105 | degradation | 55 | 1.4K | 9 | 15 |
| 107 | radioactive waste | 19 | 1.4K | 149 | 132 |
| 107 | industrial waste | 19 | 1.4K | 162 | 132 |
| 109 | Plant Genetics | 39 | 1.3K | 78 | 157 |
| 110 | Japan | 67 | 1.3K | 166 | 137 |
| 111 | Earth Sciences | 48 | 1.3K | 737 | 748 |
| 112 | Ecological Engineering | 38 | 1.3K | 20 | 49 |
| 113 | mycoses | 62 | 1.3K | 27 | 217 |
| 114 | Biomedical Engineering | 38 | 1.2K | 1377 | 1308 |
| 115 | Cell Biology | 31 | 1.1K | 1123 | 1305 |
| 116 | Population | 9 | 1.1K | 439 | 147 |
| 117 | Entomology | 83 | 1.0K | 253 | 400 |
| 118 | Housing | 6 | 1.0K | 295 | 56 |
| 119 | Urban Planning | 5 | 1.0K | 254 | 46 |
| 119 | community development | 5 | 1.0K | 417 | 48 |
| 121 | Recycling | 25 | 1.0K | 77 | 161 |
| 122 | Aquatic ecology | 17 | 1.0K | 253 | 109 |
| 123 | Nutrition | 37 | 995 | 1045 | 1197 |
| 124 | Sustainable Development | 33 | 958 | 295 | 474 |
| 125 | forest policy | 41 | 943 | 34 | 34 |
| 126 | Plant tissue culture | 36 | 925 | 63 | 87 |
| 126 | Plant cell culture | 36 | 925 | 44 | 84 |
| 128 | Agriculture | 38 | 912 | 393 | 482 |
| 129 | Radiation effects | 38 | 885 | 23 | 89 |
| 130 | Cytology | 18 | 877 | 1539 | 1430 |
| 131 | Food additives | 22 | 856 | 257 | 298 |
| 132 | soil management | 28 | 803 | 77 | 130 |
| 133 | hydrocolloids | 17 | 802 | 176 | 242 |
| 134 | Soil ecology | 36 | 790 | 88 | 206 |
| 135 | Water quality management | 51 | 781 | 207 | 350 |
| 136 | Meteorology | 23 | 773 | 688 | 777 |
| 137 | tillage | 26 | 771 | 64 | 112 |
| 138 | Nanostructures | 17 | 759 | 715 | 663 |
| 139 | Wildlife conservation | 29 | 745 | 246 | 416 |
| 140 | Industrial Microbiology | 28 | 744 | 448 | 678 |
| 141 | Bioinformatics | 29 | 742 | 527 | 634 |
| 142 | Phylogeny | 23 | 738 | 191 | 276 |
| 143 | Ultrasonics | 15 | 732 | 426 | 337 |
| 143 | Sonochemistry | 15 | 732 | 136 | 162 |
| 145 | Ecohydrology | 14 | 722 | 46 | 24 |
| 146 | Agricultural Ecology | 11 | 709 | 451 | 368 |
| 147 | Geodesy | 32 | 688 | 72 | 97 |
| 148 | Landslides | 12 | 687 | 53 | 57 |
| 149 | Electrochemistry | 35 | 675 | 1318 | 1326 |
| 150 | Genetic engineering | 29 | 672 | 518 | 723 |
| 151 | energy resources | 5 | 671 | 1011 | 671 |
| 152 | Atmospheric Physics | 12 | 663 | 703 | 558 |
| 153 | Landscape Ecology | 11 | 659 | 159 | 131 |
| 154 | Molecular evolution | 20 | 658 | 457 | 555 |
| 155 | Adhesion | 26 | 644 | 53 | 65 |
| 155 | adhesives | 26 | 644 | 60 | 66 |
| 157 | coal | 29 | 629 | 387 | 657 |
| 158 | Zoology | 52 | 627 | 487 | 723 |
| 159 | Geochemistry | 25 | 623 | 683 | 768 |
| 160 | Biogeochemistry | 16 | 606 | 404 | 490 |
| 161 | Waste management | 33 | 591 | 222 | 292 |
| 162 | Plant breeding | 20 | 590 | 168 | 161 |
| 162 | Evolution | 22 | 590 | 613 | 762 |
| 164 | Astrophysics | 25 | 586 | 1253 | 1318 |
| 165 | actuators | 6 | 572 | 1567 | 914 |
| 165 | transducers | 6 | 572 | 1567 | 914 |
| 167 | Microbial Ecology | 27 | 570 | 632 | 1065 |
| 168 | Economic History | 14 | 566 | 1513 | 943 |
| 169 | water supply | 14 | 562 | 330 | 353 |
| 170 | Molecular Genetics | 21 | 545 | 592 | 779 |
| 171 | Insects | 42 | 528 | 199 | 385 |
| 172 | carbon monoxide | 8 | 527 | 119 | 73 |
| 173 | Developmental Biology | 10 | 526 | 938 | 878 |
| 174 | Water Purification | 31 | 524 | 173 | 256 |
| 175 | Chemical industry | 14 | 519 | 509 | 263 |
| 176 | Plastics | 23 | 512 | 483 | 483 |
| 177 | Economic Development | 9 | 506 | 814 | 657 |
| 178 | Psychiatry | 7 | 497 | 2297 | 1540 |
| 179 | Mountains | 37 | 485 | 18 | 21 |
| 180 | Economics | 27 | 475 | 1477 | 1444 |
| 181 | Pharmacology | 13 | 464 | 2214 | 2022 |
| 182 | Remote Sensing | 41 | 462 | 184 | 334 |
| 182 | atmosphere | 12 | 462 | 262 | 238 |
| 184 | Manufacturing Processes | 11 | 455 | 1208 | 942 |
| 185 | sustainability | 9 | 453 | 370 | 400 |
| 186 | Biogeography | 9 | 451 | 539 | 585 |
| 187 | Breeding | 16 | 445 | 430 | 458 |
| 188 | Plant hormones | 16 | 443 | 48 | 75 |
| 189 | Recombinant DNA | 18 | 441 | 479 | 533 |
| 190 | Molecular cloning | 17 | 436 | 458 | 510 |
| 190 | Genetic recombination | 17 | 436 | 443 | 503 |
| 192 | Atmospheric Chemistry | 3 | 429 | 773 | 520 |
| 193 | Image Processing | 11 | 428 | 1190 | 1006 |
| 194 | global environmental change | 11 | 425 | 313 | 391 |
| 195 | Mental Disorders | 2 | 423 | 2502 | 1179 |
| 196 | Data Mining | 18 | 421 | 448 | 629 |
| 197 | Climatology | 22 | 420 | 546 | 777 |
| 197 | air quality management | 5 | 420 | 329 | 136 |
| 199 | data collection | 17 | 410 | 268 | 426 |
| 199 | ecosystem | 9 | 410 | 687 | 689 |
| 201 | Social Change | 8 | 407 | 565 | 610 |
| 202 | Rural Development | 3 | 401 | 508 | 172 |
| 203 | Multimedia Systems | 22 | 398 | 534 | 568 |
| 204 | Quality Control | 9 | 396 | 827 | 632 |
| 205 | economic policy | 11 | 395 | 1224 | 707 |
| 205 | fuel cells | 5 | 395 | 940 | 710 |
| 207 | United States | 26 | 393 | 1547 | 1850 |
| 208 | Solid State Chemistry | 10 | 386 | 1517 | 1077 |
| 209 | Fracture mechanics | 14 | 379 | 641 | 584 |
| 210 | Transgenic plants | 8 | 377 | 175 | 150 |
| 211 | Carbon | 6 | 375 | 892 | 828 |
| 212 | Environmental Microbiology | 19 | 368 | 404 | 789 |
| 213 | Statistical physics | 10 | 367 | 1893 | 1527 |
| 214 | Microbial Biotechnology | 18 | 363 | 180 | 338 |
| 214 | Birds | 47 | 363 | 195 | 365 |
| 216 | Developing countries | 22 | 360 | 674 | 935 |
| 217 | food handling | 6 | 358 | 541 | 393 |
| 218 | Medicinal plants | 8 | 356 | 772 | 743 |
| 219 | Physical Geography | 16 | 352 | 108 | 159 |
| 220 | genome | 14 | 351 | 558 | 841 |
| 221 | natural disasters | 17 | 350 | 352 | 550 |
| 222 | Computational Biology | 15 | 342 | 971 | 1132 |
| 223 | Ornithology | 41 | 340 | 157 | 327 |
| 224 | Conservation Biology | 31 | 338 | 199 | 545 |
| 225 | Food Preservation | 21 | 333 | 132 | 158 |
| 226 | Information Science | 17 | 332 | 991 | 1328 |
| 227 | Mathematical Physics | 19 | 329 | 1255 | 1185 |
| 228 | Organometallic chemistry | 12 | 328 | 1093 | 820 |
| 229 | Wetland ecology | 12 | 321 | 109 | 140 |
| 229 | Wetland conservation | 12 | 321 | 69 | 101 |
| 229 | Wetlands | 12 | 321 | 69 | 101 |
| 232 | Medical Laboratory Science | 10 | 318 | 985 | 1132 |
| 233 | Pharmacognosy | 4 | 316 | 1546 | 1057 |
| 234 | animals | 31 | 311 | 214 | 404 |
| 234 | food industry | 18 | 311 | 117 | 163 |
| 236 | hazard mitigation | 16 | 309 | 211 | 361 |
| 237 | Erosion | 12 | 306 | 11 | 12 |
| 238 | Microorganisms | 15 | 304 | 331 | 664 |
| 239 | Nanoparticles | 17 | 300 | 719 | 1015 |
| 240 | Tourism | 11 | 295 | 796 | 1064 |
| 241 | Plant Morphology | 16 | 293 | 136 | 173 |
| 242 | Electronics | 18 | 288 | 1423 | 1524 |
| 243 | freshwater biology | 11 | 279 | 370 | 409 |
| 244 | Planets | 9 | 275 | 805 | 931 |
| 245 | Computer Graphics | 24 | 269 | 516 | 827 |
| 246 | Information Technology | 8 | 262 | 1493 | 1257 |
| 247 | Pharmaceutical Chemistry | 9 | 255 | 1973 | 1941 |
| 247 | Forest genetics | 16 | 255 | 42 | 67 |
| 249 | Systems Engineering | 13 | 253 | 1007 | 1139 |
| 250 | Molecular ecology | 10 | 248 | 535 | 757 |
| 251 | Spectrum analysis | 12 | 247 | 2245 | 2283 |
| 251 | environmental issues | 4 | 247 | 320 | 196 |
| 253 | Agricultural Engineering | 9 | 238 | 180 | 217 |
| 253 | Geographic information systems | 11 | 238 | 455 | 407 |
| 253 | transgenic organisms | 4 | 238 | 170 | 103 |
| 253 | transgenic animals | 4 | 238 | 158 | 100 |
| 257 | soil pollution | 13 | 237 | 101 | 197 |
| 258 | Engineering Mathematics | 4 | 234 | 1679 | 802 |
| 258 | Cheminformatics | 2 | 234 | 397 | 238 |
| 258 | Informatics | 2 | 234 | 994 | 456 |
| 261 | biological invasions | 9 | 233 | 273 | 338 |
| 262 | Engineering | 16 | 232 | 1917 | 2102 |
| 263 | reforestation | 14 | 230 | 23 | 44 |
| 263 | afforestation | 14 | 230 | 23 | 44 |
| 265 | Population Genetics | 24 | 229 | 347 | 784 |
| 266 | Systems Biology | 13 | 226 | 605 | 804 |
| 266 | Animal Behavior | 21 | 226 | 657 | 1234 |
| 266 | Biomass | 8 | 226 | 291 | 478 |
| 269 | Human genetics | 2 | 225 | 1568 | 1570 |
| 269 | Magnetic Materials | 4 | 225 | 1323 | 906 |
| 271 | Parasitology | 19 | 224 | 847 | 1209 |
| 272 | Public Policy | 10 | 222 | 852 | 976 |
| 273 | Physiology | 9 | 221 | 2161 | 2318 |
| 274 | Public Health | 11 | 219 | 2414 | 2592 |
| 275 | dietary supplements | 11 | 217 | 305 | 483 |
| 276 | Calorimetry | 8 | 216 | 681 | 535 |
| 276 | Thermal analysis | 8 | 216 | 681 | 535 |
| 278 | Safety management | 8 | 212 | 220 | 139 |
| 279 | Social Sciences | 19 | 209 | 1275 | 1553 |
| 280 | Structural Engineering | 16 | 207 | 687 | 931 |
| 281 | Urban Policy | 10 | 205 | 364 | 522 |
| 281 | Soft Condensed Matter | 5 | 205 | 791 | 654 |
| 281 | biopolymers | 5 | 205 | 866 | 731 |
| 284 | Artificial Intelligence | 19 | 204 | 1540 | 2289 |
| 285 | Signal Processing | 9 | 203 | 1503 | 1607 |
| 286 | Herbal medicine | 8 | 200 | 333 | 511 |
| 287 | Immunology | 13 | 199 | 1323 | 1801 |
| 287 | Drug design | 10 | 199 | 734 | 967 |
| 287 | Bioinorganic chemistry | 4 | 199 | 1205 | 881 |
| 290 | Metabolism | 2 | 198 | 2068 | 1552 |
| 291 | Ethology | 16 | 195 | 606 | 1125 |
| 292 | Marine Biology | 13 | 193 | 1206 | 1586 |
| 293 | sustainable forestry | 25 | 192 | 3 | 14 |
| 294 | Bacteriology | 10 | 188 | 894 | 1295 |
| 295 | Signal Transduction | 10 | 187 | 690 | 1040 |
| 296 | Diet | 3 | 186 | 1626 | 1455 |
| 296 | Asia | 16 | 186 | 1037 | 1293 |
| 298 | Energy Storage | 6 | 185 | 850 | 837 |
| 298 | Soil fertility | 6 | 185 | 182 | 261 |
| 298 | finance | 17 | 185 | 968 | 1352 |
| 301 | Scandinavia | 19 | 181 | 135 | 310 |
| 302 | Engineering Geology | 7 | 180 | 894 | 936 |
| 303 | Automation | 6 | 177 | 1596 | 1567 |
| 304 | Solar Energy | 4 | 174 | 1507 | 1417 |
| 304 | Sustainable agriculture | 15 | 174 | 179 | 442 |
| 306 | Power Electronics | 3 | 173 | 983 | 806 |
| 307 | Ocean Engineering | 9 | 172 | 979 | 1125 |
| 308 | System analysis | 10 | 171 | 1326 | 1515 |
| 309 | Systems Analysis | 9 | 170 | 580 | 640 |
| 309 | bioclimatology | 14 | 170 | 259 | 574 |
| 309 | Chromatography | 10 | 170 | 812 | 933 |
| 309 | Development | 2 | 170 | 934 | 629 |
| 309 | Chromatographic analysis | 10 | 170 | 966 | 1013 |
| 309 | Economic Assistance | 2 | 170 | 822 | 578 |
| 309 | world | 2 | 170 | 835 | 650 |
| 316 | Genes | 12 | 167 | 448 | 679 |
| 317 | Animal ecology | 17 | 165 | 447 | 757 |
| 318 | Earthquake Engineering | 7 | 164 | 892 | 946 |
| 319 | Sociology | 9 | 163 | 1705 | 1778 |
| 320 | Nanochemistry | 4 | 162 | 1102 | 767 |
| 321 | Virology | 2 | 159 | 2388 | 1928 |
| 321 | Oncogenes | 2 | 159 | 973 | 943 |
| 323 | forestry | 14 | 158 | 63 | 141 |
| 324 | Bioorganic chemistry | 5 | 157 | 2051 | 1954 |
| 325 | Electrophoresis | 9 | 156 | 887 | 1084 |
| 325 | Detectors | 14 | 156 | 627 | 1016 |
| 325 | computer networks | 10 | 156 | 1346 | 1688 |
| 328 | Geology | 9 | 154 | 1632 | 1764 |
| 329 | Environmental Law | 4 | 153 | 873 | 1096 |
| 330 | eugenics | 1 | 152 | 880 | 321 |
| 330 | Behavior | 8 | 152 | 1795 | 2398 |
| 332 | solar power | 2 | 151 | 1002 | 773 |
| 332 | solar cells | 2 | 151 | 1066 | 824 |
| 334 | Psychology | 28 | 150 | 1518 | 2803 |
| 334 | Production Engineering | 6 | 150 | 1376 | 1199 |
| 336 | Proteomics | 10 | 148 | 495 | 838 |
| 336 | Solid State Physics | 11 | 148 | 2124 | 2281 |
| 338 | Oceanography | 5 | 147 | 1175 | 1171 |
| 339 | Histology | 8 | 146 | 1047 | 1302 |
| 339 | Wireless Communication Systems | 11 | 146 | 1285 | 1527 |
| 339 | Measurement | 10 | 146 | 677 | 923 |
| 339 | Australia | 8 | 146 | 991 | 1012 |
| 343 | food contamination | 11 | 145 | 346 | 561 |
| 343 | Drying | 6 | 145 | 226 | 252 |
| 345 | Endocrinology | 10 | 144 | 1345 | 1870 |
| 346 | Food Microbiology | 3 | 143 | 1114 | 1119 |
| 347 | textile fibers | 9 | 141 | 175 | 164 |
| 347 | Microscopy | 10 | 141 | 671 | 797 |
| 349 | Neural circuitry | 8 | 140 | 1257 | 1701 |
| 350 | Molecular Spectroscopy | 3 | 139 | 1804 | 1314 |
| 351 | Anatomy | 3 | 137 | 1730 | 1276 |
| 351 | Robotics | 4 | 137 | 1469 | 1192 |
| 351 | International Finance | 9 | 137 | 994 | 1264 |
| 354 | Green Technology | 4 | 136 | 282 | 232 |
| 355 | Ecological Genetics | 18 | 135 | 120 | 333 |
| 355 | miniaturization | 8 | 135 | 1050 | 1465 |
| 357 | Organic Chemistry | 10 | 134 | 1817 | 2157 |
| 358 | Epidemiology | 5 | 131 | 2289 | 2186 |
| 358 | Ecosystem management | 14 | 131 | 217 | 510 |
| 360 | Investment analysis | 11 | 130 | 332 | 644 |
| 361 | Optics | 15 | 129 | 2018 | 2380 |
| 362 | Embryology | 3 | 127 | 1190 | 1164 |
| 362 | Plant Pathology | 11 | 127 | 47 | 81 |
| 364 | nucleic acids | 4 | 125 | 1191 | 1312 |
| 364 | management | 5 | 125 | 2657 | 2673 |
| 366 | Cell differentiation | 2 | 124 | 1358 | 1294 |
| 366 | Growth | 2 | 124 | 1096 | 1058 |
| 368 | Lipids | 3 | 123 | 1155 | 1100 |
| 369 | Aquaculture | 5 | 122 | 1057 | 1057 |
| 370 | Geobiology | 6 | 119 | 265 | 368 |
| 371 | city planning | 9 | 118 | 877 | 1198 |
| 372 | Mechanical Engineering | 17 | 116 | 1066 | 1489 |
| 372 | Internet of Things | 16 | 116 | 399 | 1009 |
| 372 | internet | 16 | 116 | 565 | 1271 |
| 375 | DNS | 5 | 115 | 321 | 407 |
| 376 | Microelectronics | 6 | 114 | 1199 | 1404 |
| 376 | Post-traumatic stress disorder | 1 | 114 | 1144 | 677 |
| 378 | Mathematics | 33 | 113 | 2311 | 3361 |
| 378 | Biomechanics | 5 | 113 | 966 | 1027 |
| 378 | human behavior | 5 | 113 | 1760 | 2403 |
| 381 | Psychophysiology | 7 | 111 | 1640 | 2080 |
| 382 | Statistics | 7 | 110 | 1682 | 1527 |
| 382 | Microbial Genetics | 10 | 110 | 116 | 323 |
| 382 | Parallel Processing | 1 | 110 | 691 | 444 |
| 385 | vibration | 7 | 109 | 764 | 975 |
| 386 | Structural dynamics | 6 | 104 | 682 | 992 |
| 386 | Zeolites | 6 | 104 | 632 | 1017 |
| 388 | Cartography | 8 | 103 | 185 | 233 |
| 389 | urban forestry | 5 | 102 | 130 | 212 |
| 389 | commerce | 4 | 102 | 1364 | 1260 |
| 391 | Serology | 7 | 101 | 228 | 401 |
| 391 | Bibliometrics | 5 | 101 | 76 | 153 |
| 391 | Fertilizers | 4 | 101 | 272 | 318 |
| 394 | Adolescent | 8 | 99 | 1148 | 1534 |
| 394 | weather | 7 | 99 | 291 | 525 |
| 396 | Educational Psychology | 6 | 94 | 972 | 1213 |
| 396 | Arthropods | 10 | 94 | 50 | 132 |
| 398 | enzymes | 5 | 92 | 1063 | 1346 |
| 399 | Immunotherapy | 2 | 91 | 1667 | 1524 |
| 399 | Immunopharmacology | 2 | 91 | 1196 | 977 |
| 399 | Radiation | 9 | 91 | 1213 | 1553 |
| 399 | cytokines | 2 | 91 | 1279 | 1178 |
| 403 | economic indicators | 2 | 90 | 128 | 52 |
| 403 | viruses | 1 | 90 | 1556 | 1263 |
| 405 | Surface-Active Agents | 5 | 89 | 849 | 1303 |
| 405 | Surface properties | 5 | 89 | 899 | 1359 |
| 405 | Primates | 4 | 89 | 591 | 590 |
| 408 | Neurophysiology | 2 | 88 | 2592 | 2258 |
| 408 | Friction | 4 | 88 | 77 | 140 |
| 410 | Immunochemistry | 5 | 87 | 710 | 818 |
| 410 | immunoassay | 5 | 87 | 104 | 83 |
| 412 | mass transfer | 4 | 86 | 1474 | 1617 |
| 412 | Hormones | 11 | 86 | 587 | 1114 |
| 412 | Reproduction | 13 | 86 | 991 | 1674 |
| 415 | Child welfare | 3 | 85 | 1048 | 885 |
| 415 | Environmental Geochemistry | 3 | 85 | 552 | 514 |
| 415 | Social work | 3 | 85 | 1296 | 983 |
| 415 | Minerals | 3 | 85 | 791 | 757 |
| 419 | aromatic plants | 7 | 84 | 103 | 103 |
| 420 | Fluid Mechanics | 3 | 83 | 1406 | 1222 |
| 420 | Educational Technology | 2 | 83 | 1991 | 1522 |
| 422 | cell physiology | 2 | 82 | 1394 | 1443 |
| 422 | pigments | 4 | 82 | 746 | 872 |
| 424 | Physical organic chemistry | 1 | 81 | 1915 | 1252 |
| 424 | emergency management | 5 | 81 | 477 | 676 |
| 424 | natural products | 8 | 81 | 1103 | 1515 |
| 424 | Climate | 6 | 81 | 320 | 633 |
| 424 | proteins | 4 | 81 | 1532 | 1621 |
| 429 | Clinical Chemistry | 5 | 80 | 1762 | 2177 |
| 429 | Pesticides | 9 | 80 | 259 | 558 |
| 429 | East Asia | 4 | 80 | 507 | 385 |
| 432 | Photochemistry | 2 | 78 | 1885 | 1615 |
| 432 | Photobiology | 2 | 78 | 1626 | 1356 |
| 434 | Nonlinear functional analysis | 3 | 77 | 1219 | 1021 |
| 434 | phytopathogenic bacteria | 4 | 77 | 190 | 338 |
| 436 | Cognitive Science | 5 | 76 | 1180 | 1629 |
| 436 | Semiconductors | 2 | 76 | 2354 | 1759 |
| 436 | supercritical fluids | 2 | 76 | 492 | 491 |
| 439 | Parasites | 9 | 75 | 871 | 1385 |
| 440 | visualization | 20 | 74 | 472 | 800 |
| 440 | plant viruses | 9 | 74 | 81 | 244 |
| 440 | Enzyme | 3 | 74 | 522 | 727 |
| 443 | infrared radiation | 3 | 73 | 612 | 454 |
| 443 | Biofilms | 3 | 73 | 152 | 271 |
| 443 | Steroids | 10 | 73 | 441 | 867 |
| 443 | Molecular structure | 3 | 73 | 2380 | 2089 |
| 447 | Mobile Computing | 5 | 72 | 862 | 1022 |
| 448 | Electrochemical Analysis | 4 | 71 | 1393 | 1528 |
| 448 | Industry | 3 | 71 | 156 | 466 |
| 448 | violence | 3 | 71 | 933 | 987 |
| 451 | breastfeeding | 2 | 69 | 576 | 485 |
| 452 | Municipal Engineering | 2 | 67 | 444 | 416 |
| 453 | Linguistics | 2 | 66 | 1527 | 1062 |
| 453 | Metals | 2 | 66 | 2168 | 1834 |
| 455 | Social policy | 3 | 65 | 1024 | 923 |
| 455 | Luminescence | 6 | 65 | 988 | 1307 |
| 457 | Applied Linguistics | 1 | 64 | 1035 | 522 |
| 457 | Business | 1 | 64 | 3023 | 2367 |
| 457 | particles | 6 | 64 | 657 | 1104 |
| 457 | economic analysis | 3 | 64 | 224 | 286 |
| 461 | Tribology | 4 | 63 | 987 | 1136 |
| 462 | Alternative Medicine | 1 | 62 | 2293 | 1694 |
| 462 | complementary therapies | 1 | 62 | 2579 | 1770 |
| 464 | Humanities | 12 | 61 | 732 | 1412 |
| 464 | planning | 2 | 61 | 972 | 761 |
| 464 | drug toxicity | 1 | 61 | 928 | 663 |
| 464 | Economic planning | 2 | 61 | 673 | 627 |
| 468 | Soil Mechanics | 3 | 60 | 1007 | 1103 |
| 468 | Phylogenetics | 7 | 60 | 27 | 93 |
| 468 | starch | 5 | 60 | 219 | 377 |
| 468 | Quality of life | 6 | 60 | 935 | 1621 |
| 472 | Wildlife management | 8 | 59 | 284 | 492 |
| 473 | Simulation Methods | 2 | 58 | 1309 | 1090 |
| 473 | Transport | 1 | 58 | 928 | 739 |
| 473 | Sea | 1 | 58 | 829 | 607 |
| 473 | Fishery resources | 1 | 58 | 910 | 665 |
| 473 | Fisheries | 1 | 58 | 2082 | 1428 |
| 478 | Heterocyclic chemistry | 3 | 57 | 549 | 377 |
| 478 | Nonlinear Dynamics | 2 | 57 | 1967 | 1766 |
| 478 | Synthetic biology | 1 | 57 | 507 | 394 |
| 478 | Fuzzy systems | 12 | 57 | 718 | 1505 |
| 478 | mathematical concepts | 1 | 57 | 729 | 347 |
| 483 | Asymmetric synthesis | 2 | 56 | 137 | 69 |
| 483 | Mineral resources | 2 | 56 | 842 | 954 |
| 485 | concrete | 2 | 55 | 1080 | 1256 |
| 486 | Computer Science | 9 | 54 | 1160 | 1883 |
| 486 | Control Theory | 3 | 54 | 1712 | 1611 |
| 486 | Fermentation | 3 | 54 | 225 | 264 |
| 486 | Parasitic Diseases | 6 | 54 | 1241 | 1857 |
| 486 | irrigation | 3 | 54 | 344 | 347 |
| 486 | brewing | 3 | 54 | 182 | 190 |
| 486 | disease vectors | 6 | 54 | 608 | 1115 |
| 486 | Product life cycle | 2 | 54 | 358 | 414 |
| 486 | green products | 2 | 54 | 316 | 398 |
| 486 | Cement | 1 | 54 | 867 | 873 |
| 486 | mathematical analysis | 11 | 54 | 1477 | 1937 |
| 497 | Intelligent Transportation Systems | 4 | 53 | 937 | 1360 |
| 497 | Medical Microbiology | 2 | 53 | 1970 | 2203 |
| 497 | Energy Harvesting | 1 | 53 | 653 | 763 |
| 500 | Neurology | 2 | 52 | 3783 | 3788 |
| 501 | Photonics | 2 | 51 | 1906 | 1908 |
| 501 | Second Language Acquisition | 1 | 51 | 374 | 325 |
| 501 | DNA polymerases | 1 | 51 | 551 | 727 |
| 504 | Developmental Psychology | 3 | 50 | 991 | 1159 |
| 504 | Animal welfare | 3 | 50 | 243 | 372 |
| 504 | sex crimes | 1 | 50 | 1012 | 765 |
| 507 | Marine Pollution | 3 | 49 | 1151 | 1591 |
| 507 | Cognition | 9 | 49 | 968 | 1769 |
| 509 | Magnetic Resonance Spectroscopy | 1 | 48 | 1448 | 1027 |
| 509 | nuclear magnetic resonance spectroscopy | 1 | 48 | 1023 | 705 |
| 509 | NMR | 1 | 48 | 850 | 531 |
| 509 | magnetic resonance | 1 | 48 | 863 | 540 |
| 513 | Electrical Engineering | 7 | 47 | 2109 | 2507 |
| 513 | biological factors | 5 | 47 | 1476 | 2100 |
| 515 | Psychometrics | 1 | 46 | 650 | 523 |
| 515 | Microstructure | 1 | 46 | 1534 | 932 |
| 517 | plant health | 1 | 45 | 69 | 53 |
| 518 | Freshwater Ecology | 4 | 44 | 193 | 256 |
| 518 | Family | 1 | 44 | 1498 | 1099 |
| 518 | families | 1 | 44 | 1371 | 913 |
| 521 | Education | 3 | 43 | 3407 | 3224 |
| 521 | Pharmaceutical Technology | 2 | 43 | 1658 | 1813 |
| 521 | catalytic activity | 2 | 43 | 775 | 920 |
| 524 | Agricultural Science | 3 | 42 | 194 | 418 |
| 524 | indoor air pollution | 2 | 42 | 471 | 561 |
| 524 | phenomics | 3 | 42 | 26 | 48 |
| 524 | Ventilation | 2 | 42 | 652 | 663 |
| 524 | Host-parasite interactions | 4 | 42 | 902 | 1554 |
| 524 | Sick building syndrome | 2 | 42 | 471 | 561 |
| 524 | gastrointestinal tract | 2 | 42 | 387 | 653 |
| 531 | Molecular Pharmacology | 1 | 41 | 1106 | 1157 |
| 531 | Epigenetics | 6 | 41 | 104 | 323 |
| 531 | Plant Taxonomy | 6 | 41 | 247 | 496 |
| 531 | Epigenomics | 6 | 41 | 103 | 317 |
| 531 | Korea | 6 | 41 | 176 | 301 |
| 531 | Monomers | 1 | 41 | 164 | 96 |
| 537 | Geriatrics | 2 | 40 | 2668 | 2582 |
| 537 | Fire ecology | 1 | 40 | 134 | 165 |
| 537 | human development | 1 | 40 | 1231 | 1128 |
| 537 | drugs | 4 | 40 | 1554 | 2150 |
| 541 | Entropy | 4 | 39 | 1052 | 1339 |
| 541 | Flood control | 2 | 39 | 333 | 359 |
| 541 | drainage | 2 | 39 | 357 | 303 |
| 541 | Nervous system | 3 | 39 | 1979 | 2526 |
| 545 | Physical Chemistry | 1 | 38 | 2720 | 2275 |
| 545 | Cosmochemistry | 1 | 38 | 1224 | 1176 |
| 545 | econometric models | 2 | 38 | 832 | 963 |
| 545 | rivers | 2 | 38 | 351 | 433 |
| 549 | Hydrodynamics | 3 | 37 | 545 | 783 |
| 550 | Food Science | 4 | 36 | 130 | 250 |
| 550 | Pathology | 1 | 36 | 2139 | 2060 |
| 550 | Telecommunication Systems | 1 | 36 | 2325 | 1752 |
| 550 | Agronomy | 3 | 36 | 400 | 775 |
| 550 | Drug delivery systems | 3 | 36 | 1509 | 2036 |
| 550 | personality | 2 | 36 | 1677 | 1958 |
| 550 | ovary | 2 | 36 | 249 | 346 |
| 557 | Nanobiotechnology | 2 | 35 | 521 | 943 |
| 557 | Human-Computer Interaction | 3 | 35 | 1518 | 2016 |
| 557 | Energy Consumption | 2 | 35 | 487 | 735 |
| 557 | silicon | 1 | 35 | 742 | 439 |
| 561 | Phytochemistry | 2 | 34 | 399 | 579 |
| 561 | Histochemistry | 3 | 34 | 948 | 1208 |
| 561 | Combustion | 2 | 34 | 1365 | 1570 |
| 561 | Phytoremediation | 2 | 34 | 399 | 579 |
| 561 | environmental remediation | 2 | 34 | 483 | 653 |
| 561 | Bioreactors | 2 | 34 | 399 | 579 |
| 561 | wind erosion | 1 | 34 | 216 | 248 |
| 561 | Edible plants | 5 | 34 | 104 | 520 |
| 569 | Industrial Safety | 3 | 33 | 1162 | 1523 |
| 569 | crops | 2 | 33 | 169 | 190 |
| 569 | Vegetation | 6 | 33 | 34 | 95 |
| 569 | Europe | 2 | 33 | 3014 | 2890 |
| 569 | Aging | 1 | 33 | 3008 | 2612 |
| 574 | Nuclear Energy | 2 | 32 | 1128 | 1075 |
| 574 | Production Management | 2 | 32 | 1379 | 1812 |
| 576 | Structural design | 2 | 31 | 1047 | 1150 |
| 576 | Geriatric Psychiatry | 1 | 31 | 1363 | 1262 |
| 576 | Mental Health | 1 | 31 | 2227 | 1893 |
| 576 | Technology Assessment | 1 | 31 | 853 | 1007 |
| 576 | Smart Materials | 2 | 31 | 1155 | 1278 |
| 576 | Mental Health Services | 1 | 31 | 1580 | 1450 |
| 576 | Gerontology | 1 | 31 | 2516 | 1948 |
| 576 | Spectroscopy | 3 | 31 | 156 | 94 |
| 584 | Computer Engineering | 3 | 30 | 1016 | 1386 |
| 584 | Environmental Ethics | 9 | 30 | 34 | 190 |
| 584 | Water quality | 3 | 30 | 179 | 446 |
| 584 | Capital market | 3 | 30 | 436 | 797 |
| 584 | Water chemistry | 3 | 30 | 312 | 612 |
| 584 | health planning | 2 | 30 | 2482 | 2635 |
| 590 | Higher Education | 1 | 29 | 1112 | 885 |
| 590 | Stochastic Processes | 2 | 29 | 1137 | 1150 |
| 590 | Restoration Ecology | 4 | 29 | 327 | 679 |
| 590 | Analytical Biochemistry | 4 | 29 | 1438 | 2138 |
| 594 | Child psychology | 3 | 28 | 1268 | 1854 |
| 594 | packaging | 2 | 28 | 146 | 251 |
| 596 | Rock Mechanics | 2 | 27 | 974 | 1196 |
| 596 | Biogeochemical cycles | 2 | 27 | 451 | 796 |
| 596 | Biological Systems | 3 | 27 | 523 | 936 |
| 596 | poverty | 2 | 27 | 527 | 733 |
| 596 | protein | 3 | 27 | 1087 | 1483 |
| 596 | energy development | 5 | 27 | 568 | 1546 |
| 602 | Numerical Analysis | 5 | 26 | 1944 | 2565 |
| 602 | Happiness | 3 | 26 | 435 | 942 |
| 602 | Microbial Metabolism | 1 | 26 | 418 | 579 |
| 602 | heredity | 5 | 26 | 461 | 907 |
| 606 | Intelligent Control Systems | 7 | 25 | 715 | 1422 |
| 606 | Emulsions | 5 | 25 | 241 | 565 |
| 606 | DNA | 2 | 25 | 724 | 924 |
| 606 | Egypt | 1 | 25 | 1134 | 1146 |
| 610 | Coastal zone management | 1 | 24 | 1079 | 1142 |
| 610 | healthcare disparities | 1 | 24 | 795 | 842 |
| 610 | Socioeconomic Factors | 1 | 24 | 1255 | 1385 |
| 610 | Adaptive control systems | 1 | 24 | 1023 | 893 |
| 610 | Marine resources | 1 | 24 | 1111 | 1191 |
| 610 | Body Image | 1 | 24 | 385 | 513 |
| 610 | Telecommunication | 6 | 24 | 1847 | 2960 |
| 610 | telemarketing | 1 | 24 | 230 | 313 |
| 610 | ecotourism | 2 | 24 | 314 | 585 |
| 619 | Social Psychology | 2 | 23 | 2427 | 2869 |
| 619 | Comparative Physiology | 4 | 23 | 657 | 1225 |
| 619 | Child | 5 | 23 | 1564 | 2520 |
| 619 | Computer-Aided Design | 1 | 23 | 1830 | 1745 |
| 619 | landscapes | 3 | 23 | 164 | 369 |
| 619 | children | 5 | 23 | 329 | 759 |
| 625 | Antioxidants | 1 | 22 | 1061 | 1318 |
| 625 | Library Science | 2 | 22 | 1180 | 1174 |
| 625 | Mitochondrial DNA | 9 | 22 | 42 | 233 |
| 625 | Learning | 3 | 22 | 1167 | 1799 |
| 625 | Oxidation-reduction | 1 | 22 | 1064 | 1381 |
| 630 | Risk Management | 3 | 21 | 635 | 1148 |
| 630 | Dynamics | 3 | 21 | 1649 | 2033 |
| 630 | Metallic Glasses | 1 | 21 | 736 | 787 |
| 630 | Navier-Stokes equations | 1 | 21 | 314 | 227 |
| 630 | Aggression | 2 | 21 | 605 | 928 |
| 630 | wildlife diseases | 3 | 21 | 152 | 274 |
| 636 | Civil Engineering | 2 | 20 | 1740 | 1758 |
| 636 | Emergency Medical Services | 2 | 20 | 760 | 1000 |
| 636 | Environmental Psychology | 4 | 20 | 278 | 888 |
| 636 | Greenhouse gases | 1 | 20 | 462 | 668 |
| 636 | bioluminescence | 1 | 20 | 724 | 615 |
| 641 | Paleoclimatology | 2 | 19 | 1161 | 1593 |
| 641 | Paleoecology | 2 | 19 | 1133 | 1506 |
| 641 | Cytogenetics | 3 | 19 | 1108 | 1796 |
| 641 | Cognitive Radio Networks | 1 | 19 | 377 | 420 |
| 641 | Paleogeography | 2 | 19 | 1037 | 1392 |
| 641 | Ethnology | 2 | 19 | 1717 | 1863 |
| 641 | Tropical Medicine | 2 | 19 | 1840 | 2342 |
| 641 | Papermaking | 6 | 19 | 52 | 103 |
| 649 | Cybernetics | 5 | 18 | 1198 | 2288 |
| 649 | Information visualization | 5 | 18 | 100 | 325 |
| 649 | Animal breeding | 3 | 18 | 725 | 1155 |
| 649 | Food service management | 1 | 18 | 798 | 1096 |
| 649 | Decision Support Systems | 1 | 18 | 339 | 371 |
| 654 | Paleontology | 2 | 17 | 1362 | 1642 |
| 654 | Planetary Science | 1 | 17 | 764 | 736 |
| 654 | Computer Vision | 4 | 17 | 975 | 1760 |
| 654 | Heritage Tourism | 2 | 17 | 163 | 377 |
| 654 | cultural tourism | 2 | 17 | 163 | 377 |
| 654 | Methodology | 2 | 17 | 689 | 927 |
| 654 | Algal blooms | 1 | 17 | 461 | 641 |
| 654 | Cyanobacteria | 1 | 17 | 461 | 641 |
| 654 | lasers | 3 | 17 | 2041 | 2671 |
| 654 | microalgae | 1 | 17 | 461 | 641 |
| 664 | Econometrics | 3 | 16 | 1331 | 1757 |
| 664 | Landscape Architecture | 3 | 16 | 135 | 218 |
| 664 | Fishery management | 1 | 16 | 1195 | 1285 |
| 664 | Communication | 2 | 16 | 2366 | 2883 |
| 664 | Granular materials | 1 | 16 | 1069 | 1328 |
| 669 | Functional Analysis | 3 | 15 | 1371 | 1781 |
| 669 | Genetic epidemiology | 1 | 15 | 368 | 456 |
| 669 | Gene expression regulation | 2 | 15 | 1032 | 1507 |
| 669 | Genetic regulation | 2 | 15 | 1100 | 1623 |
| 669 | Computational Complexity | 4 | 15 | 909 | 1622 |
| 669 | synthesis | 1 | 15 | 1666 | 1625 |
| 675 | adolescence | 5 | 14 | 680 | 1624 |
| 675 | machinery | 4 | 14 | 697 | 1374 |
| 675 | foods | 2 | 14 | 154 | 407 |
| 675 | Social behavior | 3 | 14 | 1128 | 1873 |
| 675 | color | 1 | 14 | 489 | 539 |
| 675 | venom | 1 | 14 | 1234 | 1431 |
| 675 | Toxins | 1 | 14 | 1364 | 1577 |
| 682 | Visual Communication | 1 | 13 | 842 | 916 |
| 682 | Hydraulic Engineering | 2 | 13 | 975 | 1366 |
| 682 | Morphology | 1 | 13 | 1378 | 1298 |
| 682 | Nuclear Chemistry | 2 | 13 | 1251 | 1526 |
| 682 | Radiochemistry | 2 | 13 | 1169 | 1410 |
| 682 | Image enhancement | 1 | 13 | 679 | 825 |
| 682 | Adolescent Psychology | 3 | 13 | 780 | 1408 |
| 682 | Reproductive toxicology | 1 | 13 | 702 | 956 |
| 682 | clay | 1 | 13 | 1284 | 1666 |
| 682 | scholarly publishing | 1 | 13 | 276 | 309 |
| 682 | Insect biochemistry | 1 | 13 | 712 | 904 |
| 693 | Architectural Design | 2 | 12 | 589 | 838 |
| 693 | Combinatorial optimization | 2 | 12 | 690 | 885 |
| 693 | Risk assessment | 4 | 12 | 495 | 1368 |
| 693 | Transnational corporations | 2 | 12 | 518 | 1061 |
| 693 | ecological risk assessment | 4 | 12 | 148 | 736 |
| 693 | Evidence-Based Medicine | 1 | 12 | 1219 | 1439 |
| 693 | Eastern Europe | 2 | 12 | 1145 | 1353 |
| 693 | Brain | 2 | 12 | 2408 | 3285 |
| 693 | compost | 1 | 12 | 48 | 96 |
| 693 | Health Risk Assessment | 4 | 12 | 340 | 1087 |
| 693 | economic development projects | 1 | 12 | 391 | 529 |
| 704 | Nuclear Physics | 2 | 11 | 3578 | 4099 |
| 704 | Regional Planning | 4 | 11 | 1232 | 2337 |
| 704 | Comparative Education | 1 | 11 | 476 | 563 |
| 704 | Natural resources | 2 | 11 | 882 | 1439 |
| 704 | Anti-inflammatory agents | 1 | 11 | 520 | 730 |
| 704 | Education and globalization | 1 | 11 | 57 | 54 |
| 704 | Wireless Communication | 2 | 11 | 595 | 959 |
| 704 | Behavioral Finance | 1 | 11 | 143 | 248 |
| 704 | International Education | 1 | 11 | 501 | 675 |
| 704 | Inflammation | 1 | 11 | 1465 | 1918 |
| 704 | Radioisotopes | 2 | 11 | 1201 | 1589 |
| 704 | Transnational education | 1 | 11 | 57 | 54 |
| 704 | educational innovations | 1 | 11 | 954 | 1165 |
| 717 | Algebra | 6 | 10 | 1129 | 1715 |
| 717 | Photogrammetry | 3 | 10 | 839 | 1071 |
| 717 | Immunotoxicology | 1 | 10 | 580 | 775 |
| 717 | Chemical kinetics | 2 | 10 | 1000 | 1343 |
| 717 | Family Therapy | 1 | 10 | 1157 | 1309 |
| 717 | child mental health | 1 | 10 | 790 | 998 |
| 717 | Chemical processes | 1 | 10 | 985 | 1203 |
| 717 | Vocational guidance | 1 | 10 | 1384 | 1669 |
| 717 | counseling | 1 | 10 | 1862 | 2033 |
| 717 | Vietnam | 1 | 10 | 268 | 401 |
| 717 | Philippines | 1 | 10 | 248 | 356 |
| 728 | Chronobiology | 2 | 9 | 634 | 1078 |
| 728 | biological clocks | 2 | 9 | 634 | 1078 |
| 728 | Visual Perception | 1 | 9 | 1783 | 2092 |
| 728 | Molecules | 1 | 9 | 2056 | 2191 |
| 728 | circadian rhythm | 2 | 9 | 634 | 1078 |
| 728 | Chemical structure | 1 | 9 | 1028 | 1165 |
| 728 | biological rhythms | 2 | 9 | 608 | 1049 |
| 728 | Youth | 4 | 9 | 561 | 1412 |
| 728 | Memory | 1 | 9 | 1933 | 2354 |
| 728 | Attention | 1 | 9 | 1863 | 2258 |
| 728 | Perception | 1 | 9 | 1985 | 2306 |
| 728 | Isotopes | 1 | 9 | 244 | 382 |
| 728 | cycles | 2 | 9 | 212 | 385 |
| 741 | Mechatronics | 3 | 8 | 900 | 1763 |
| 741 | Dendrochronology | 1 | 8 | 76 | 140 |
| 741 | Adsorption | 2 | 8 | 278 | 606 |
| 741 | Genetic translocation | 1 | 8 | 364 | 538 |
| 741 | Computational Intelligence | 2 | 8 | 891 | 1511 |
| 741 | Ubiquitous computing | 1 | 8 | 620 | 650 |
| 741 | Aquatic animals | 1 | 8 | 349 | 544 |
| 741 | plasmids | 1 | 8 | 364 | 538 |
| 749 | Audiology | 1 | 7 | 1001 | 1204 |
| 749 | Operations Research | 2 | 7 | 2351 | 3168 |
| 749 | Aerial Photography | 1 | 7 | 48 | 50 |
| 749 | Real Estate Investment | 1 | 7 | 307 | 416 |
| 749 | Portfolio Management | 1 | 7 | 509 | 535 |
| 749 | marketing | 1 | 7 | 2667 | 3169 |
| 749 | atmospheric models | 1 | 7 | 815 | 1128 |
| 749 | real estate | 1 | 7 | 119 | 183 |
| 757 | Emerging infectious diseases | 1 | 6 | 533 | 856 |
| 757 | Solitons | 1 | 6 | 1891 | 2320 |
| 757 | Fractals | 1 | 6 | 1899 | 2323 |
| 757 | Chaos | 1 | 6 | 1891 | 2320 |
| 757 | reasoning | 1 | 6 | 809 | 986 |
| 757 | North America | 2 | 6 | 978 | 1633 |
| 757 | multimedia | 2 | 6 | 606 | 1107 |
| 757 | Agricultural systems | 1 | 6 | 534 | 931 |
| 757 | Interactive multimedia | 2 | 6 | 702 | 1331 |
| 757 | biological monitoring | 1 | 6 | 866 | 1320 |
| 757 | herbicides | 1 | 6 | 409 | 619 |
| 768 | Systems Theory | 3 | 5 | 406 | 1076 |
| 768 | Computational Chemistry | 1 | 5 | 1048 | 1424 |
| 768 | Language Disorders | 1 | 5 | 1176 | 1504 |
| 768 | Thermodynamics | 2 | 5 | 1497 | 2186 |
| 768 | Chemical Ecology | 1 | 5 | 810 | 1184 |
| 768 | Nondestructive testing | 1 | 5 | 1082 | 1416 |
| 768 | Veterinary Pathology | 1 | 5 | 558 | 765 |
| 768 | Psycholinguistics | 1 | 5 | 1324 | 1757 |
| 768 | Agricultural Biotechnology | 2 | 5 | 413 | 704 |
| 768 | Thin Films | 1 | 5 | 896 | 1205 |
| 768 | Cross-Cultural Studies | 1 | 5 | 1280 | 1773 |
| 768 | Superconductors | 1 | 5 | 1194 | 1395 |
| 768 | Genetic databases | 1 | 5 | 120 | 216 |
| 768 | Superconductivity | 1 | 5 | 695 | 883 |
| 768 | Ceramic materials | 1 | 5 | 1929 | 2461 |
| 768 | Industrial Policy | 1 | 5 | 818 | 1134 |
| 768 | Crystallography | 2 | 5 | 1801 | 2204 |
| 768 | Taste | 1 | 5 | 588 | 921 |
| 768 | smell | 1 | 5 | 588 | 921 |
| 768 | Metallography | 1 | 5 | 1257 | 1664 |
| 768 | Writing | 1 | 5 | 513 | 786 |
| 768 | innovation | 1 | 5 | 1023 | 1522 |
| 768 | pheromones | 1 | 5 | 763 | 1120 |
| 768 | cross-cultural comparison | 1 | 5 | 934 | 1339 |
| 768 | Reading | 1 | 5 | 924 | 1220 |
| 768 | Southeast Asia | 2 | 5 | 490 | 962 |
| 768 | Food preferences | 1 | 5 | 671 | 1025 |
| 768 | California | 2 | 5 | 444 | 799 |
| 796 | Palynology | 1 | 4 | 426 | 627 |
| 796 | Cryptography | 3 | 4 | 682 | 1302 |
| 796 | Labor Economics | 1 | 4 | 833 | 1088 |
| 796 | Multiscale Modeling | 1 | 4 | 164 | 234 |
| 796 | Crystallization | 1 | 4 | 793 | 1007 |
| 796 | consumer behavior | 1 | 4 | 975 | 1486 |
| 796 | Behavioral research | 3 | 4 | 605 | 1761 |
| 796 | Mass Spectrometry | 1 | 4 | 1477 | 1960 |
| 796 | Food inspection | 1 | 4 | 85 | 196 |
| 796 | Formal Languages | 1 | 4 | 569 | 685 |
| 796 | Proteome | 1 | 4 | 1379 | 1930 |
| 796 | Sound | 1 | 4 | 1555 | 1858 |
| 796 | Organometallic compounds | 1 | 4 | 1818 | 2309 |
| 796 | Latin America | 1 | 4 | 1658 | 1803 |
| 796 | X-ray crystallography | 1 | 4 | 741 | 945 |
| 796 | industrial relations | 1 | 4 | 1319 | 1774 |
| 796 | school environment | 1 | 4 | 218 | 422 |
| 796 | food quality | 1 | 4 | 85 | 196 |
| 796 | Grasslands | 1 | 4 | 135 | 222 |
| 796 | Vaccines | 1 | 4 | 2054 | 2744 |
| 816 | Arts | 1 | 3 | 800 | 886 |
| 816 | Archaeology | 1 | 3 | 1746 | 2069 |
| 816 | Food Safety | 1 | 3 | 581 | 1051 |
| 816 | Development Economics | 1 | 3 | 766 | 1171 |
| 816 | Fluid Dynamics | 1 | 3 | 1561 | 2063 |
| 816 | Sedimentology | 1 | 3 | 973 | 1455 |
| 816 | housing policy | 1 | 3 | 248 | 415 |
| 816 | Distributed Databases | 1 | 3 | 312 | 506 |
| 816 | Speech Perception | 1 | 3 | 577 | 891 |
| 816 | auditory perception | 1 | 3 | 693 | 1040 |
| 816 | Functional foods | 3 | 3 | 342 | 1156 |
| 816 | Sports | 1 | 3 | 2749 | 3110 |
| 816 | Medical innovations | 2 | 3 | 973 | 1902 |
| 816 | Mortgages | 1 | 3 | 382 | 610 |
| 816 | Oral communication | 1 | 3 | 775 | 1179 |
| 816 | body temperature | 1 | 3 | 993 | 1555 |
| 816 | cryosphere | 1 | 3 | 528 | 811 |
| 816 | Speech | 1 | 3 | 1300 | 1756 |
| 834 | Speech-Language Pathology | 1 | 2 | 528 | 868 |
| 834 | Marine Ecology | 1 | 2 | 1107 | 1606 |
| 834 | Biosensors | 1 | 2 | 1731 | 2411 |
| 834 | Marine Meteorology | 2 | 2 | 349 | 710 |
| 834 | Nonverbal Communication | 1 | 2 | 371 | 655 |
| 834 | Organizational learning | 1 | 2 | 998 | 1752 |
| 834 | Lipid metabolism | 2 | 2 | 503 | 1045 |
| 834 | Integrated Circuits | 2 | 2 | 980 | 1570 |
| 834 | Expert Systems | 2 | 2 | 305 | 979 |
| 834 | Diagnostic Imaging | 2 | 2 | 1863 | 3027 |
| 834 | Animal husbandry | 1 | 2 | 505 | 838 |
| 834 | Ocean-atmosphere interaction | 2 | 2 | 95 | 251 |
| 834 | Body language | 1 | 2 | 244 | 496 |
| 834 | Quantum Optics | 1 | 2 | 1269 | 1672 |
| 834 | Knowledge management | 1 | 2 | 1037 | 1780 |
| 834 | Wind power | 1 | 2 | 529 | 866 |
| 834 | automatic speech recognition | 1 | 2 | 325 | 604 |
| 834 | Bioelectronics | 1 | 2 | 1556 | 2185 |
| 834 | Lipid | 2 | 2 | 505 | 1047 |
| 834 | free radicals | 1 | 2 | 1648 | 2259 |
| 834 | Imaging systems | 2 | 2 | 1051 | 1935 |
| 834 | livestock | 1 | 2 | 767 | 1137 |
| 834 | Atomic spectroscopy | 1 | 2 | 1548 | 2024 |
| 834 | Laser Spectroscopy | 1 | 2 | 1206 | 1623 |
| 834 | mammals | 1 | 2 | 1391 | 1953 |
| 834 | Decision making | 1 | 2 | 2211 | 3105 |
| 834 | winds | 1 | 2 | 233 | 436 |
| 861 | Astronomy | 1 | 1 | 2881 | 3550 |
| 861 | Ergonomics | 1 | 1 | 1354 | 1926 |
| 861 | Logistics | 1 | 1 | 1010 | 1568 |
| 861 | Probability | 1 | 1 | 924 | 1393 |
| 861 | Avionics | 1 | 1 | 253 | 475 |
| 861 | Algorithms | 1 | 1 | 1227 | 1724 |
| 861 | Industrial Ecology | 1 | 1 | 324 | 605 |
| 861 | Transportation | 1 | 1 | 2242 | 3117 |
| 861 | Freeze-Drying | 1 | 1 | 666 | 1076 |
| 861 | Hypothermia | 1 | 1 | 666 | 1076 |
| 861 | Financial management | 1 | 1 | 794 | 1340 |
| 861 | Freeze Drying | 1 | 1 | 666 | 1076 |
| 861 | Risk | 1 | 1 | 848 | 1367 |
| 861 | individual differences | 1 | 1 | 529 | 944 |
| 861 | Urban Areas | 1 | 1 | 467 | 868 |
| 861 | gardens | 1 | 1 | 82 | 118 |
| 861 | Cancer | 1 | 1 | 2969 | 4039 |
| 878 | Medical Technology | 1 | 0 | 2270 | 3361 |
| 878 | Geometry | 1 | 0 | 1676 | 2167 |
| 878 | Health Policy | 1 | 0 | 2697 | 3837 |
| 878 | Ceramics | 1 | 0 | 2033 | 2719 |
| 878 | Crime prevention | 1 | 0 | 460 | 813 |
| 878 | Tissue Engineering | 1 | 0 | 616 | 1019 |
| 878 | International Law | 3 | 0 | 412 | 872 |
| 878 | Language and Education | 1 | 0 | 272 | 555 |
| 878 | Medical Anthropology | 1 | 0 | 1696 | 2563 |
| 878 | Noise control | 1 | 0 | 490 | 562 |
| 878 | isomerism | 1 | 0 | 629 | 1089 |
| 878 | Africa | 1 | 0 | 2357 | 3329 |
| 878 | Chirality | 1 | 0 | 629 | 1089 |