| 1 | Environment | 413 | 24.4K | 174 | 243 |
| 2 | Biomass Energy | 524 | 21.4K | 9 | 25 |
| 3 | Chemical Engineering | 395 | 20.9K | 225 | 176 |
| 4 | Chemistry | 388 | 17.6K | 1053 | 1025 |
| 5 | Biochemical Engineering | 284 | 15.6K | 111 | 202 |
| 6 | Ecology | 500 | 15.4K | 314 | 579 |
| 7 | Pollution | 317 | 15.3K | 308 | 365 |
| 8 | Environmental Management | 342 | 15.1K | 15 | 22 |
| 9 | Science | 364 | 14.2K | 933 | 1612 |
| 10 | Green Chemistry | 174 | 13.5K | 51 | 29 |
| 11 | Materials | 166 | 12.9K | 1012 | 577 |
| 12 | Botany | 394 | 12.7K | 214 | 327 |
| 13 | Mycology | 182 | 11.5K | 50 | 27 |
| 14 | Fungi | 151 | 10.8K | 23 | 18 |
| 15 | Biotechnology | 451 | 10.7K | 235 | 585 |
| 16 | Biochemistry | 379 | 10.4K | 1035 | 1296 |
| 17 | Molecular Biology | 352 | 9.4K | 773 | 1302 |
| 18 | China | 610 | 8.9K | 53 | 60 |
| 19 | Biology | 160 | 8.8K | 1734 | 2105 |
| 20 | Environmental Health | 235 | 8.6K | 363 | 501 |
| 21 | Research | 303 | 8.2K | 856 | 1070 |
| 22 | environmental pollution | 254 | 8.0K | 227 | 334 |
| 23 | Biocompatible Materials | 75 | 7.9K | 826 | 463 |
| 24 | Sustainable Engineering | 122 | 7.7K | 57 | 31 |
| 25 | Medicine | 287 | 7.6K | 1233 | 1770 |
| 26 | Materials Science | 76 | 7.5K | 1108 | 530 |
| 27 | Physics | 87 | 7.0K | 2801 | 2508 |
| 28 | Biophysics | 211 | 6.5K | 753 | 743 |
| 29 | Catalysis | 102 | 6.2K | 747 | 557 |
| 30 | environmental indicators | 182 | 5.9K | 6 | 7 |
| 31 | Water | 92 | 5.9K | 306 | 286 |
| 32 | Environmental Engineering | 159 | 5.8K | 253 | 384 |
| 33 | Nanotechnology | 118 | 5.7K | 895 | 860 |
| 34 | Plant physiology | 181 | 5.5K | 95 | 228 |
| 35 | Water pollution | 105 | 5.4K | 255 | 251 |
| 36 | Forest Ecology | 182 | 5.2K | 33 | 56 |
| 37 | Hydrology | 148 | 4.9K | 184 | 212 |
| 38 | Agricultural Chemistry | 80 | 4.9K | 330 | 171 |
| 39 | Soil Science | 146 | 4.6K | 95 | 124 |
| 40 | Plants | 170 | 4.6K | 101 | 313 |
| 41 | Environmental Policy | 130 | 4.3K | 211 | 397 |
| 42 | Forest Management | 157 | 4.3K | 39 | 69 |
| 43 | Genomics | 140 | 4.3K | 278 | 390 |
| 44 | Plant cells | 67 | 4.1K | 205 | 335 |
| 45 | plant molecular biology | 124 | 4.0K | 108 | 329 |
| 46 | Polymers | 146 | 3.9K | 727 | 744 |
| 47 | Geomorphology | 112 | 3.9K | 46 | 83 |
| 48 | Environmental monitoring | 104 | 3.8K | 406 | 508 |
| 49 | Composite Materials | 79 | 3.7K | 424 | 379 |
| 50 | Environmental Geology | 116 | 3.6K | 36 | 45 |
| 51 | Microbiology | 151 | 3.4K | 1095 | 1809 |
| 52 | Biodiversity conservation | 62 | 3.3K | 270 | 480 |
| 53 | Plant Ecology | 148 | 3.1K | 82 | 266 |
| 54 | Natural history | 23 | 3.1K | 1845 | 2405 |
| 55 | sanitation | 46 | 3.1K | 349 | 394 |
| 56 | Cellulose | 70 | 3.0K | 27 | 27 |
| 57 | Colloids | 82 | 2.9K | 762 | 765 |
| 58 | nanoscience | 43 | 2.9K | 801 | 641 |
| 59 | polymerization | 106 | 2.9K | 743 | 747 |
| 60 | Climate change | 22 | 2.8K | 395 | 435 |
| 60 | Eutrophication | 22 | 2.8K | 389 | 432 |
| 62 | wood | 155 | 2.7K | 12 | 13 |
| 63 | environmental protection | 68 | 2.6K | 497 | 535 |
| 64 | Optical materials | 26 | 2.5K | 1022 | 560 |
| 65 | Land use | 72 | 2.4K | 51 | 57 |
| 66 | Plant genetic engineering | 44 | 2.2K | 127 | 129 |
| 67 | Surface Chemistry | 66 | 2.1K | 904 | 909 |
| 68 | Food | 83 | 2.1K | 402 | 550 |
| 69 | Bioengineering | 70 | 2.0K | 882 | 1442 |
| 70 | Toxicology | 33 | 1.9K | 1830 | 1309 |
| 71 | biofuels | 24 | 1.9K | 37 | 30 |
| 72 | Plant Biotechnology | 51 | 1.8K | 66 | 94 |
| 73 | gene mapping | 56 | 1.7K | 340 | 574 |
| 74 | Industrial Engineering | 43 | 1.7K | 346 | 271 |
| 75 | Chromosome mapping | 54 | 1.7K | 292 | 451 |
| 76 | soil microbiology | 67 | 1.7K | 186 | 440 |
| 77 | Environmental Toxicology | 28 | 1.7K | 722 | 582 |
| 78 | Environmental Chemistry | 16 | 1.7K | 934 | 609 |
| 79 | Technology | 49 | 1.7K | 1042 | 813 |
| 80 | Genetics | 76 | 1.6K | 852 | 1648 |
| 81 | Energy Conversion | 7 | 1.6K | 915 | 472 |
| 82 | food technology | 67 | 1.6K | 392 | 503 |
| 83 | Building Materials | 55 | 1.6K | 240 | 380 |
| 84 | Geography | 43 | 1.6K | 563 | 430 |
| 85 | plant communities | 41 | 1.5K | 206 | 318 |
| 86 | Horticulture | 45 | 1.5K | 93 | 42 |
| 87 | Environmental pollutants | 20 | 1.5K | 866 | 468 |
| 88 | Geophysics | 43 | 1.5K | 1292 | 1246 |
| 89 | Analytical Chemistry | 41 | 1.5K | 1591 | 1397 |
| 90 | Membranes | 23 | 1.5K | 686 | 529 |
| 91 | soil conservation | 65 | 1.4K | 25 | 39 |
| 92 | Plant diseases | 95 | 1.4K | 250 | 424 |
| 93 | Bioremediation | 39 | 1.4K | 37 | 41 |
| 94 | pollutants | 19 | 1.4K | 721 | 410 |
| 94 | environmental exposure | 19 | 1.4K | 693 | 316 |
| 96 | Biodegradation | 35 | 1.4K | 39 | 46 |
| 97 | Renewable Energy Sources | 31 | 1.3K | 645 | 1006 |
| 98 | Nanostructured Materials | 40 | 1.3K | 1067 | 1061 |
| 99 | energy conservation | 23 | 1.3K | 539 | 496 |
| 100 | Japan | 64 | 1.3K | 318 | 225 |
| 101 | Plant Genetics | 38 | 1.2K | 97 | 208 |
| 102 | land degradation | 54 | 1.2K | 13 | 26 |
| 102 | degradation | 54 | 1.2K | 13 | 26 |
| 104 | Hazardous waste | 20 | 1.2K | 184 | 171 |
| 105 | biological evolution | 36 | 1.2K | 617 | 891 |
| 106 | mycoses | 62 | 1.2K | 37 | 307 |
| 107 | radioactive waste | 18 | 1.2K | 162 | 160 |
| 107 | industrial waste | 18 | 1.2K | 175 | 161 |
| 109 | Ecological Engineering | 36 | 1.2K | 39 | 72 |
| 110 | Earth Sciences | 44 | 1.2K | 941 | 1001 |
| 111 | Biomedical Engineering | 37 | 1.1K | 1656 | 1638 |
| 112 | Computational Biology | 27 | 1.1K | 965 | 959 |
| 113 | Biodiversity | 52 | 1.1K | 407 | 724 |
| 114 | Energy Policy | 25 | 1.1K | 875 | 933 |
| 115 | Soil biology | 28 | 1.1K | 271 | 397 |
| 116 | Entomology | 86 | 993 | 340 | 543 |
| 117 | Cell Biology | 29 | 992 | 1868 | 2556 |
| 118 | Population | 9 | 982 | 612 | 167 |
| 119 | Housing | 6 | 963 | 322 | 55 |
| 120 | Urban Planning | 5 | 961 | 294 | 46 |
| 120 | community development | 5 | 961 | 460 | 44 |
| 122 | Aquatic ecology | 17 | 953 | 315 | 147 |
| 123 | Plant tissue culture | 35 | 892 | 88 | 127 |
| 123 | Plant cell culture | 35 | 892 | 69 | 126 |
| 125 | Wildlife conservation | 34 | 880 | 281 | 495 |
| 126 | forest policy | 38 | 867 | 45 | 42 |
| 127 | Nutrition | 34 | 860 | 1605 | 1934 |
| 128 | Agriculture | 37 | 851 | 551 | 692 |
| 129 | Molecular evolution | 46 | 824 | 303 | 665 |
| 130 | Computational Intelligence | 13 | 823 | 279 | 60 |
| 130 | Recycling | 19 | 823 | 121 | 219 |
| 132 | Meteorology | 30 | 810 | 817 | 1147 |
| 133 | Radiation effects | 32 | 802 | 47 | 123 |
| 134 | Nanostructures | 23 | 787 | 730 | 866 |
| 135 | Sustainable Development | 31 | 768 | 406 | 681 |
| 136 | Cytology | 17 | 764 | 2630 | 2817 |
| 137 | Water quality management | 50 | 736 | 221 | 411 |
| 138 | Molecular Genetics | 47 | 721 | 459 | 979 |
| 139 | Industrial Microbiology | 28 | 708 | 511 | 835 |
| 140 | Ultrasonics | 14 | 691 | 405 | 323 |
| 140 | Sonochemistry | 14 | 691 | 154 | 185 |
| 142 | Ecohydrology | 14 | 684 | 65 | 29 |
| 143 | Food additives | 19 | 682 | 398 | 418 |
| 144 | Agricultural Ecology | 11 | 668 | 571 | 522 |
| 145 | Bioinformatics | 23 | 666 | 768 | 1023 |
| 145 | Plant breeding | 25 | 666 | 208 | 211 |
| 147 | Genetic engineering | 28 | 648 | 676 | 1116 |
| 148 | hydrocolloids | 14 | 642 | 240 | 310 |
| 149 | Geodesy | 33 | 638 | 94 | 136 |
| 150 | Soil ecology | 26 | 637 | 159 | 304 |
| 151 | Electrochemistry | 34 | 633 | 1560 | 1676 |
| 152 | soil management | 23 | 620 | 112 | 178 |
| 153 | Atmospheric Physics | 10 | 606 | 1110 | 830 |
| 154 | Landslides | 12 | 599 | 69 | 86 |
| 154 | Phylogeny | 19 | 599 | 280 | 410 |
| 156 | Geochemistry | 25 | 590 | 867 | 1086 |
| 157 | tillage | 21 | 589 | 87 | 149 |
| 158 | Landscape Ecology | 10 | 577 | 201 | 177 |
| 159 | Biogeochemistry | 15 | 572 | 564 | 674 |
| 160 | Waste management | 33 | 569 | 225 | 314 |
| 161 | Zoology | 49 | 567 | 649 | 979 |
| 161 | Adhesion | 22 | 567 | 71 | 72 |
| 161 | adhesives | 22 | 567 | 83 | 74 |
| 164 | Astrophysics | 25 | 555 | 1718 | 1918 |
| 165 | actuators | 6 | 538 | 1883 | 1079 |
| 165 | transducers | 6 | 538 | 1883 | 1079 |
| 167 | Water Purification | 31 | 502 | 176 | 286 |
| 168 | Economic History | 14 | 501 | 2053 | 1181 |
| 169 | coal | 23 | 498 | 502 | 828 |
| 170 | Chemical industry | 13 | 493 | 653 | 313 |
| 171 | Plastics | 24 | 490 | 521 | 536 |
| 172 | Developmental Biology | 10 | 489 | 1432 | 1505 |
| 173 | Insects | 43 | 475 | 268 | 540 |
| 174 | Psychiatry | 7 | 467 | 3907 | 2805 |
| 175 | water supply | 10 | 465 | 552 | 534 |
| 176 | carbon monoxide | 6 | 463 | 156 | 85 |
| 177 | Mountains | 37 | 447 | 26 | 26 |
| 178 | Manufacturing Processes | 11 | 437 | 1381 | 1085 |
| 179 | Microbial Ecology | 24 | 434 | 898 | 1808 |
| 180 | Plant hormones | 16 | 429 | 68 | 90 |
| 181 | Pharmacology | 12 | 427 | 3843 | 3612 |
| 182 | Recombinant DNA | 17 | 422 | 631 | 774 |
| 183 | Molecular cloning | 16 | 417 | 601 | 725 |
| 183 | Genetic recombination | 16 | 417 | 584 | 716 |
| 185 | Biogeography | 9 | 413 | 643 | 801 |
| 186 | Atmospheric Chemistry | 3 | 401 | 1123 | 746 |
| 187 | Economic Development | 9 | 399 | 1099 | 1008 |
| 187 | Mental Disorders | 2 | 399 | 4635 | 2191 |
| 189 | air quality management | 6 | 393 | 327 | 185 |
| 190 | Forest genetics | 22 | 391 | 44 | 62 |
| 191 | atmosphere | 9 | 384 | 458 | 365 |
| 192 | Rural Development | 3 | 379 | 669 | 185 |
| 193 | global environmental change | 8 | 377 | 550 | 602 |
| 193 | Breeding | 13 | 377 | 617 | 682 |
| 195 | Multimedia Systems | 20 | 373 | 508 | 450 |
| 196 | Transgenic plants | 8 | 371 | 256 | 229 |
| 197 | Quality Control | 8 | 369 | 1177 | 805 |
| 197 | ecosystem | 8 | 369 | 947 | 993 |
| 199 | Solid State Chemistry | 9 | 365 | 1810 | 1264 |
| 200 | fuel cells | 3 | 360 | 1452 | 917 |
| 201 | Social Change | 8 | 357 | 559 | 633 |
| 202 | Carbon | 8 | 354 | 957 | 998 |
| 203 | Climatology | 19 | 352 | 792 | 1160 |
| 204 | Statistical physics | 11 | 351 | 2504 | 2063 |
| 205 | Microbial Biotechnology | 18 | 346 | 202 | 402 |
| 206 | energy resources | 4 | 343 | 1339 | 1185 |
| 207 | Fracture mechanics | 13 | 341 | 735 | 705 |
| 207 | economic policy | 11 | 341 | 1551 | 899 |
| 209 | food handling | 6 | 340 | 642 | 482 |
| 210 | Remote Sensing | 33 | 339 | 278 | 466 |
| 211 | Economics | 22 | 338 | 2056 | 2092 |
| 212 | Physical Geography | 16 | 336 | 149 | 187 |
| 213 | Medicinal plants | 8 | 335 | 957 | 905 |
| 214 | genome | 13 | 329 | 878 | 1571 |
| 215 | Mathematical Physics | 24 | 315 | 1318 | 1452 |
| 215 | Microscopy | 14 | 315 | 777 | 716 |
| 217 | Environmental Microbiology | 19 | 314 | 482 | 1183 |
| 218 | Spectrum analysis | 14 | 313 | 2803 | 2949 |
| 219 | Medical Laboratory Science | 10 | 310 | 1322 | 1460 |
| 220 | natural disasters | 16 | 309 | 423 | 704 |
| 221 | Data Mining | 13 | 308 | 678 | 1055 |
| 222 | Birds | 43 | 307 | 274 | 538 |
| 223 | Wetland ecology | 12 | 301 | 141 | 188 |
| 223 | sustainability | 7 | 301 | 506 | 635 |
| 223 | Wetland conservation | 12 | 301 | 102 | 137 |
| 223 | Developing countries | 17 | 301 | 1009 | 1343 |
| 223 | Wetlands | 12 | 301 | 103 | 137 |
| 228 | Pharmacognosy | 4 | 297 | 1923 | 1314 |
| 228 | data collection | 12 | 297 | 405 | 772 |
| 230 | Erosion | 11 | 290 | 14 | 18 |
| 231 | Information Science | 14 | 285 | 1220 | 1553 |
| 232 | Ornithology | 37 | 284 | 219 | 453 |
| 233 | Conservation Biology | 26 | 282 | 310 | 878 |
| 234 | Plant Morphology | 16 | 279 | 155 | 214 |
| 234 | animals | 31 | 279 | 265 | 546 |
| 236 | Tourism | 11 | 276 | 858 | 1098 |
| 237 | Evolution | 20 | 272 | 812 | 1573 |
| 238 | Electronics | 17 | 269 | 1930 | 1905 |
| 239 | hazard mitigation | 15 | 266 | 274 | 483 |
| 239 | United States | 21 | 266 | 2476 | 3455 |
| 241 | Organometallic chemistry | 10 | 265 | 1226 | 967 |
| 242 | Microorganisms | 14 | 264 | 553 | 1179 |
| 243 | Image Processing | 8 | 263 | 1430 | 1319 |
| 244 | Planets | 7 | 259 | 1325 | 1449 |
| 245 | Information Technology | 9 | 257 | 1628 | 1206 |
| 245 | Alternative Medicine | 7 | 257 | 1406 | 1122 |
| 245 | complementary therapies | 7 | 257 | 1545 | 1138 |
| 248 | freshwater biology | 9 | 253 | 572 | 569 |
| 249 | Computer Graphics | 23 | 242 | 553 | 982 |
| 249 | environmental issues | 4 | 242 | 391 | 259 |
| 251 | Food Preservation | 20 | 237 | 164 | 252 |
| 252 | Engineering Mathematics | 14 | 233 | 1304 | 1147 |
| 252 | transgenic organisms | 4 | 233 | 209 | 159 |
| 252 | transgenic animals | 4 | 233 | 193 | 152 |
| 255 | Pharmaceutical Chemistry | 9 | 232 | 3076 | 3375 |
| 256 | Nanoparticles | 15 | 231 | 891 | 1460 |
| 257 | Molecular ecology | 9 | 228 | 752 | 1181 |
| 257 | System analysis | 24 | 228 | 842 | 1504 |
| 259 | Cheminformatics | 2 | 224 | 543 | 343 |
| 259 | Informatics | 2 | 224 | 1304 | 628 |
| 261 | food industry | 11 | 218 | 193 | 212 |
| 262 | reforestation | 13 | 216 | 37 | 61 |
| 262 | Magnetic Materials | 4 | 216 | 1484 | 1074 |
| 262 | Parasitology | 18 | 216 | 1177 | 1748 |
| 262 | afforestation | 13 | 216 | 37 | 61 |
| 266 | Population Genetics | 23 | 215 | 441 | 1199 |
| 266 | soil pollution | 12 | 215 | 144 | 270 |
| 268 | Physiology | 9 | 212 | 3391 | 3819 |
| 269 | Evidence-Based Medicine | 7 | 210 | 908 | 729 |
| 270 | Engineering | 17 | 207 | 2262 | 2710 |
| 271 | Artificial Intelligence | 28 | 205 | 1393 | 2589 |
| 271 | Geographic information systems | 9 | 205 | 600 | 499 |
| 273 | Animal Behavior | 20 | 203 | 820 | 1862 |
| 273 | dietary supplements | 10 | 203 | 340 | 572 |
| 275 | Soft Condensed Matter | 5 | 202 | 976 | 847 |
| 275 | biopolymers | 5 | 202 | 1104 | 937 |
| 277 | Calorimetry | 8 | 197 | 719 | 578 |
| 277 | Thermal analysis | 8 | 197 | 719 | 578 |
| 279 | Agricultural Engineering | 11 | 196 | 210 | 298 |
| 279 | Human genetics | 1 | 196 | 4076 | 3760 |
| 281 | Bioinorganic chemistry | 4 | 195 | 1471 | 1067 |
| 282 | Public Health | 9 | 192 | 4675 | 5328 |
| 283 | Metabolism | 2 | 190 | 4183 | 3115 |
| 284 | Immunology | 13 | 189 | 2613 | 3837 |
| 284 | biological invasions | 8 | 189 | 364 | 512 |
| 286 | Public Policy | 10 | 186 | 1062 | 1427 |
| 286 | Development | 3 | 186 | 957 | 742 |
| 288 | Safety management | 6 | 183 | 371 | 217 |
| 289 | Drug design | 10 | 178 | 1030 | 1562 |
| 290 | sustainable forestry | 23 | 177 | 8 | 24 |
| 291 | Signal Transduction | 9 | 176 | 951 | 1565 |
| 291 | Ethology | 15 | 176 | 751 | 1702 |
| 293 | Energy Storage | 6 | 173 | 1001 | 1048 |
| 294 | Soil fertility | 6 | 171 | 236 | 371 |
| 295 | Herbal medicine | 8 | 170 | 369 | 663 |
| 296 | Robotics | 8 | 169 | 1164 | 1235 |
| 296 | Biomass | 5 | 169 | 492 | 718 |
| 298 | Diet | 3 | 168 | 2777 | 2415 |
| 299 | Bacteriology | 9 | 167 | 1417 | 2260 |
| 300 | Asia | 17 | 166 | 1166 | 1605 |
| 300 | Scandinavia | 19 | 166 | 141 | 391 |
| 302 | Marine Biology | 11 | 161 | 1702 | 2328 |
| 302 | Genes | 12 | 161 | 558 | 954 |
| 304 | forestry | 16 | 160 | 74 | 177 |
| 305 | Oncogenes | 2 | 158 | 1753 | 1767 |
| 305 | Economic Assistance | 2 | 158 | 1056 | 735 |
| 305 | world | 2 | 158 | 1097 | 890 |
| 308 | Chromatography | 10 | 157 | 1022 | 1305 |
| 308 | Chromatographic analysis | 10 | 157 | 1211 | 1416 |
| 310 | Urban Policy | 7 | 155 | 480 | 680 |
| 310 | Systems Analysis | 9 | 155 | 634 | 734 |
| 312 | Engineering Geology | 7 | 153 | 1036 | 1240 |
| 312 | Sustainable agriculture | 15 | 153 | 242 | 610 |
| 314 | Social Sciences | 16 | 150 | 1837 | 2304 |
| 315 | Automation | 5 | 149 | 1687 | 1501 |
| 315 | eugenics | 1 | 149 | 1457 | 481 |
| 317 | Structural Engineering | 14 | 148 | 853 | 1204 |
| 318 | Animal ecology | 15 | 147 | 564 | 1065 |
| 319 | Endocrinology | 11 | 146 | 2306 | 3592 |
| 319 | Nanochemistry | 3 | 146 | 1420 | 870 |
| 321 | Production Engineering | 6 | 144 | 1621 | 1371 |
| 321 | Solar Energy | 3 | 144 | 1992 | 1792 |
| 321 | Electrophoresis | 9 | 144 | 1145 | 1566 |
| 324 | Systems Biology | 9 | 140 | 1063 | 1588 |
| 324 | computer networks | 12 | 140 | 1344 | 1875 |
| 326 | Geology | 9 | 139 | 2295 | 2601 |
| 326 | Histology | 8 | 139 | 1463 | 2070 |
| 328 | Drying | 6 | 138 | 253 | 293 |
| 329 | Oceanography | 5 | 137 | 1754 | 1756 |
| 329 | Solid State Physics | 10 | 137 | 2783 | 3101 |
| 331 | Australia | 8 | 135 | 1402 | 1469 |
| 332 | solar power | 2 | 134 | 1171 | 982 |
| 332 | solar cells | 2 | 134 | 1304 | 1076 |
| 334 | Food Microbiology | 2 | 133 | 1884 | 1619 |
| 334 | bioclimatology | 12 | 133 | 353 | 811 |
| 334 | textile fibers | 9 | 133 | 258 | 210 |
| 337 | Optics | 13 | 132 | 3158 | 3495 |
| 338 | Ecological Genetics | 18 | 131 | 142 | 416 |
| 339 | Organic Chemistry | 10 | 130 | 2346 | 3054 |
| 340 | Proteomics | 9 | 129 | 723 | 1438 |
| 341 | Anatomy | 3 | 128 | 2525 | 2127 |
| 342 | Sociology | 8 | 127 | 2249 | 2757 |
| 343 | food contamination | 11 | 126 | 471 | 798 |
| 344 | Psychology | 19 | 124 | 2560 | 4929 |
| 345 | Behavior | 6 | 123 | 2939 | 3978 |
| 346 | Plant Pathology | 11 | 122 | 45 | 100 |
| 347 | Lipids | 2 | 119 | 2077 | 1748 |
| 348 | Molecular Spectroscopy | 2 | 118 | 2529 | 1663 |
| 348 | nucleic acids | 4 | 118 | 1973 | 2408 |
| 350 | Embryology | 3 | 117 | 1981 | 2106 |
| 350 | Environmental Law | 3 | 117 | 1370 | 1745 |
| 352 | Epidemiology | 4 | 115 | 4448 | 4449 |
| 352 | Ecosystem management | 13 | 115 | 277 | 748 |
| 352 | Cell differentiation | 2 | 115 | 2581 | 2548 |
| 352 | Growth | 2 | 115 | 1763 | 1798 |
| 356 | Systems Engineering | 10 | 114 | 1259 | 1619 |
| 356 | Post-traumatic stress disorder | 1 | 114 | 1535 | 875 |
| 358 | Mechanical Engineering | 20 | 113 | 1072 | 1789 |
| 358 | Neural circuitry | 7 | 113 | 1425 | 2091 |
| 358 | Ocean Engineering | 7 | 113 | 1235 | 1652 |
| 361 | Measurement | 7 | 112 | 854 | 1137 |
| 361 | DNS | 5 | 112 | 410 | 566 |
| 361 | management | 6 | 112 | 2896 | 3274 |
| 364 | Earthquake Engineering | 5 | 111 | 1098 | 1271 |
| 365 | Microbial Genetics | 10 | 107 | 150 | 408 |
| 366 | Geobiology | 6 | 106 | 359 | 542 |
| 366 | Aquaculture | 5 | 106 | 1367 | 1470 |
| 368 | miniaturization | 6 | 105 | 1580 | 2417 |
| 369 | Dynamics | 16 | 103 | 802 | 1371 |
| 369 | Psychophysiology | 6 | 103 | 2635 | 3495 |
| 371 | Investment analysis | 7 | 100 | 467 | 764 |
| 371 | Zeolites | 6 | 100 | 692 | 1190 |
| 373 | Statistics | 6 | 99 | 2389 | 2354 |
| 373 | Biomechanics | 7 | 99 | 1138 | 1658 |
| 373 | Fertilizers | 4 | 99 | 360 | 417 |
| 376 | Mathematics | 30 | 98 | 2725 | 4664 |
| 376 | vibration | 7 | 98 | 920 | 1188 |
| 376 | human behavior | 3 | 98 | 3066 | 3664 |
| 376 | Detectors | 14 | 98 | 283 | 600 |
| 380 | Electrical Engineering | 11 | 97 | 2307 | 2342 |
| 381 | Serology | 7 | 95 | 304 | 543 |
| 381 | Bioorganic chemistry | 3 | 95 | 3309 | 3339 |
| 381 | commerce | 4 | 95 | 1617 | 1509 |
| 384 | Wireless Communication Systems | 5 | 94 | 1853 | 1683 |
| 385 | International Finance | 4 | 93 | 1577 | 1580 |
| 386 | Palynology | 2 | 92 | 418 | 192 |
| 387 | Bibliometrics | 4 | 91 | 116 | 190 |
| 388 | Computer Engineering | 9 | 89 | 342 | 650 |
| 389 | Neurophysiology | 2 | 88 | 4043 | 3827 |
| 390 | Virology | 1 | 87 | 5604 | 4718 |
| 390 | viruses | 1 | 87 | 2830 | 2431 |
| 390 | weather | 7 | 87 | 338 | 722 |
| 393 | Microelectronics | 4 | 85 | 1907 | 2250 |
| 393 | economic indicators | 2 | 85 | 156 | 69 |
| 395 | Cartography | 9 | 84 | 253 | 305 |
| 395 | Immunochemistry | 5 | 84 | 984 | 1242 |
| 395 | Arthropods | 10 | 84 | 65 | 175 |
| 395 | urban forestry | 4 | 84 | 195 | 289 |
| 395 | immunoassay | 5 | 84 | 122 | 106 |
| 400 | Immunotherapy | 1 | 82 | 3625 | 2797 |
| 400 | Immunopharmacology | 1 | 82 | 2150 | 1410 |
| 400 | cytokines | 1 | 82 | 2646 | 1946 |
| 403 | Structural dynamics | 4 | 81 | 1032 | 1388 |
| 403 | Environmental Geochemistry | 3 | 81 | 604 | 604 |
| 403 | Minerals | 3 | 81 | 888 | 919 |
| 403 | Primates | 3 | 81 | 931 | 828 |
| 407 | Hormones | 10 | 80 | 879 | 1920 |
| 407 | Spain | 6 | 80 | 625 | 247 |
| 409 | aromatic plants | 7 | 79 | 110 | 103 |
| 409 | city planning | 6 | 79 | 1278 | 1696 |
| 411 | Physical organic chemistry | 1 | 77 | 2386 | 1567 |
| 412 | Clinical Chemistry | 5 | 76 | 3095 | 4126 |
| 412 | Adolescent | 4 | 76 | 2470 | 2604 |
| 412 | proteins | 5 | 76 | 2164 | 2782 |
| 415 | Fluid Mechanics | 3 | 75 | 1997 | 1818 |
| 415 | Nonlinear functional analysis | 3 | 75 | 1278 | 1109 |
| 415 | Friction | 3 | 75 | 101 | 172 |
| 415 | phytopathogenic bacteria | 4 | 75 | 235 | 462 |
| 419 | Semiconductors | 2 | 74 | 2877 | 2117 |
| 419 | pigments | 4 | 74 | 784 | 1013 |
| 421 | Educational Psychology | 4 | 73 | 1381 | 1598 |
| 421 | finance | 8 | 73 | 1647 | 2242 |
| 423 | Photochemistry | 2 | 72 | 2633 | 2283 |
| 423 | Photobiology | 2 | 72 | 2082 | 1773 |
| 423 | Climate | 6 | 72 | 419 | 914 |
| 423 | enzymes | 3 | 72 | 1892 | 2221 |
| 427 | Surface-Active Agents | 4 | 71 | 1062 | 1746 |
| 427 | emergency management | 5 | 71 | 713 | 1091 |
| 427 | Surface properties | 4 | 71 | 1142 | 1862 |
| 427 | Reproduction | 11 | 71 | 1608 | 3093 |
| 427 | Parasites | 8 | 71 | 1182 | 2031 |
| 432 | Educational Technology | 2 | 70 | 2206 | 1700 |
| 433 | infrared radiation | 3 | 69 | 741 | 582 |
| 433 | Child welfare | 3 | 69 | 1374 | 1360 |
| 433 | Social work | 3 | 69 | 1820 | 1450 |
| 433 | Molecular structure | 3 | 69 | 3047 | 3010 |
| 437 | supercritical fluids | 2 | 68 | 548 | 607 |
| 437 | Steroids | 9 | 68 | 672 | 1453 |
| 439 | Municipal Engineering | 2 | 67 | 571 | 468 |
| 439 | Nonlinear Dynamics | 3 | 67 | 2478 | 2493 |
| 441 | visualization | 20 | 66 | 575 | 1095 |
| 441 | natural products | 7 | 66 | 1345 | 2012 |
| 443 | Metals | 2 | 64 | 3146 | 2718 |
| 444 | Radiation | 7 | 63 | 1828 | 2651 |
| 444 | Electrochemical Analysis | 4 | 63 | 1550 | 1878 |
| 444 | mass transfer | 3 | 63 | 1898 | 2154 |
| 444 | Luminescence | 6 | 63 | 1075 | 1487 |
| 448 | plant viruses | 7 | 62 | 114 | 329 |
| 449 | Business | 1 | 61 | 3924 | 2712 |
| 450 | Tribology | 4 | 60 | 1223 | 1470 |
| 450 | Control Theory | 4 | 60 | 1715 | 1711 |
| 450 | Cognitive Science | 5 | 60 | 1356 | 2232 |
| 453 | breastfeeding | 2 | 59 | 833 | 774 |
| 454 | Simulation Methods | 2 | 58 | 1479 | 1215 |
| 454 | drug toxicity | 1 | 58 | 1108 | 812 |
| 456 | Phylogenetics | 7 | 57 | 39 | 114 |
| 456 | violence | 3 | 57 | 1120 | 1357 |
| 458 | Wildlife management | 7 | 55 | 433 | 734 |
| 458 | economic analysis | 3 | 55 | 271 | 318 |
| 458 | mathematical concepts | 1 | 55 | 893 | 415 |
| 461 | Linguistics | 1 | 54 | 2851 | 1417 |
| 461 | Applied Linguistics | 1 | 54 | 1192 | 605 |
| 461 | Synthetic biology | 1 | 54 | 685 | 526 |
| 461 | Transport | 1 | 54 | 1267 | 1089 |
| 461 | Sea | 1 | 54 | 1142 | 914 |
| 461 | particles | 5 | 54 | 822 | 1384 |
| 461 | Fishery resources | 1 | 54 | 1279 | 1008 |
| 461 | Enzyme | 1 | 54 | 1012 | 953 |
| 461 | Industry | 3 | 54 | 184 | 646 |
| 461 | Fisheries | 1 | 54 | 3089 | 2191 |
| 471 | Parasitic Diseases | 5 | 53 | 2119 | 3310 |
| 471 | East Asia | 3 | 53 | 731 | 587 |
| 471 | disease vectors | 5 | 53 | 875 | 1601 |
| 471 | Fuzzy systems | 12 | 53 | 764 | 1759 |
| 475 | Fermentation | 3 | 52 | 327 | 388 |
| 475 | starch | 5 | 52 | 303 | 512 |
| 475 | brewing | 3 | 52 | 280 | 273 |
| 475 | Quality of life | 6 | 52 | 1259 | 2649 |
| 479 | Soil Mechanics | 3 | 51 | 1289 | 1509 |
| 479 | irrigation | 3 | 51 | 419 | 436 |
| 481 | Neurology | 2 | 50 | 7485 | 7710 |
| 481 | Second Language Acquisition | 1 | 50 | 383 | 368 |
| 481 | Animal welfare | 3 | 50 | 384 | 528 |
| 481 | Pesticides | 7 | 50 | 430 | 967 |
| 485 | Computer Science | 8 | 49 | 1543 | 2516 |
| 485 | Mobile Computing | 5 | 49 | 972 | 1247 |
| 487 | Photonics | 2 | 48 | 2365 | 2576 |
| 487 | Energy Harvesting | 1 | 48 | 808 | 983 |
| 487 | Magnetic Resonance Spectroscopy | 1 | 48 | 2245 | 1630 |
| 487 | nuclear magnetic resonance spectroscopy | 1 | 48 | 1447 | 987 |
| 487 | NMR | 1 | 48 | 1097 | 680 |
| 487 | mathematical analysis | 10 | 48 | 1713 | 2266 |
| 487 | magnetic resonance | 1 | 48 | 1152 | 697 |
| 494 | DNA polymerases | 1 | 47 | 1011 | 1408 |
| 495 | Psychometrics | 1 | 46 | 815 | 636 |
| 495 | Mineral resources | 2 | 46 | 823 | 1072 |
| 497 | sex crimes | 1 | 45 | 1215 | 945 |
| 498 | Biofilms | 2 | 44 | 222 | 457 |
| 498 | Social policy | 3 | 44 | 1198 | 1298 |
| 498 | Microstructure | 1 | 44 | 1757 | 1063 |
| 501 | plant health | 1 | 43 | 99 | 74 |
| 501 | cell physiology | 1 | 43 | 2856 | 3012 |
| 503 | Developmental Psychology | 3 | 42 | 1196 | 1716 |
| 504 | Telecommunication Systems | 2 | 41 | 2171 | 1961 |
| 504 | Plant Taxonomy | 7 | 41 | 315 | 661 |
| 504 | Medical Microbiology | 2 | 41 | 3611 | 4546 |
| 507 | Freshwater Ecology | 3 | 40 | 298 | 330 |
| 507 | Internet of Things | 7 | 40 | 433 | 978 |
| 507 | Pharmaceutical Technology | 2 | 40 | 2185 | 2613 |
| 507 | internet | 7 | 40 | 820 | 1743 |
| 507 | catalytic activity | 2 | 40 | 864 | 1109 |
| 507 | planning | 2 | 40 | 1102 | 1088 |
| 507 | Economic planning | 2 | 40 | 709 | 880 |
| 514 | Monomers | 1 | 39 | 182 | 96 |
| 515 | Flood control | 2 | 38 | 407 | 447 |
| 515 | indoor air pollution | 2 | 38 | 604 | 834 |
| 515 | drainage | 2 | 38 | 415 | 350 |
| 515 | Ventilation | 2 | 38 | 816 | 959 |
| 515 | Sick building syndrome | 2 | 38 | 604 | 834 |
| 515 | drugs | 4 | 38 | 2529 | 3849 |
| 515 | Cognition | 8 | 38 | 1235 | 2739 |
| 515 | gastrointestinal tract | 2 | 38 | 463 | 863 |
| 523 | Physical Chemistry | 1 | 37 | 3971 | 3496 |
| 523 | Green Technology | 3 | 37 | 473 | 761 |
| 525 | Molecular Pharmacology | 1 | 36 | 1591 | 1796 |
| 525 | Cosmochemistry | 1 | 36 | 1692 | 1685 |
| 525 | ovary | 2 | 36 | 323 | 477 |
| 525 | concrete | 1 | 36 | 1767 | 1808 |
| 525 | Cement | 1 | 36 | 1130 | 1239 |
| 530 | Pathology | 1 | 35 | 4565 | 4526 |
| 530 | Intelligent Transportation Systems | 3 | 35 | 850 | 1186 |
| 530 | Agronomy | 3 | 35 | 627 | 1152 |
| 530 | Family | 1 | 35 | 1900 | 1587 |
| 530 | families | 1 | 35 | 1684 | 1232 |
| 535 | Agricultural Science | 2 | 34 | 333 | 656 |
| 535 | Epigenetics | 5 | 34 | 143 | 436 |
| 535 | Hydrodynamics | 3 | 34 | 656 | 1056 |
| 535 | Fire ecology | 1 | 34 | 168 | 217 |
| 535 | Epigenomics | 5 | 34 | 141 | 427 |
| 540 | Phytochemistry | 2 | 33 | 446 | 656 |
| 540 | Signal Processing | 5 | 33 | 1797 | 2889 |
| 540 | Energy Consumption | 2 | 33 | 310 | 453 |
| 540 | Phytoremediation | 2 | 33 | 446 | 656 |
| 540 | environmental remediation | 2 | 33 | 550 | 756 |
| 540 | Bioreactors | 2 | 33 | 446 | 656 |
| 540 | Drug delivery systems | 3 | 33 | 1858 | 3005 |
| 540 | Korea | 6 | 33 | 226 | 466 |
| 540 | biological factors | 4 | 33 | 2051 | 3361 |
| 540 | Product life cycle | 1 | 33 | 702 | 757 |
| 540 | green products | 1 | 33 | 615 | 728 |
| 551 | Education | 3 | 32 | 4914 | 4926 |
| 551 | Histochemistry | 3 | 32 | 1360 | 1960 |
| 551 | Biological Systems | 6 | 32 | 501 | 1383 |
| 551 | human development | 1 | 32 | 1456 | 1472 |
| 551 | Vegetation | 6 | 32 | 51 | 129 |
| 551 | rivers | 2 | 32 | 458 | 611 |
| 557 | Development Economics | 2 | 31 | 703 | 842 |
| 557 | Human-Computer Interaction | 3 | 31 | 1787 | 2602 |
| 557 | Entropy | 3 | 31 | 1293 | 1652 |
| 557 | crops | 3 | 31 | 157 | 244 |
| 561 | Geriatrics | 2 | 30 | 4652 | 4968 |
| 561 | Marine Pollution | 2 | 30 | 1760 | 2467 |
| 563 | Humanities | 8 | 29 | 1188 | 2185 |
| 563 | Nuclear Energy | 2 | 29 | 1685 | 1508 |
| 563 | Structural design | 1 | 29 | 1593 | 1441 |
| 563 | Geriatric Psychiatry | 1 | 29 | 2286 | 2305 |
| 563 | Mental Health | 1 | 29 | 3487 | 3009 |
| 563 | Smart Materials | 1 | 29 | 1799 | 1636 |
| 563 | Water quality | 3 | 29 | 215 | 553 |
| 563 | Mental Health Services | 1 | 29 | 2758 | 2453 |
| 563 | Production Management | 1 | 29 | 1951 | 2174 |
| 563 | Gerontology | 1 | 29 | 3914 | 3200 |
| 563 | Spectroscopy | 3 | 29 | 246 | 170 |
| 563 | Water chemistry | 3 | 29 | 357 | 740 |
| 563 | health planning | 2 | 29 | 3285 | 3765 |
| 576 | Environmental Economics | 1 | 28 | 992 | 860 |
| 576 | Restoration Ecology | 4 | 28 | 416 | 986 |
| 576 | Combustion | 2 | 28 | 1718 | 2136 |
| 579 | Food Science | 3 | 27 | 177 | 332 |
| 579 | Nervous system | 3 | 27 | 3153 | 4929 |
| 581 | Analytical Biochemistry | 4 | 26 | 1956 | 3441 |
| 581 | wind erosion | 1 | 26 | 264 | 352 |
| 581 | Host-parasite interactions | 1 | 26 | 2508 | 3142 |
| 581 | energy development | 5 | 26 | 664 | 1981 |
| 581 | silicon | 1 | 26 | 883 | 620 |
| 586 | Industrial Safety | 2 | 25 | 1851 | 2254 |
| 586 | Nanobiotechnology | 2 | 25 | 620 | 1342 |
| 586 | poverty | 2 | 25 | 660 | 1035 |
| 586 | Microbial Metabolism | 1 | 25 | 486 | 701 |
| 586 | Mobile Commerce | 4 | 25 | 274 | 376 |
| 586 | phenomics | 2 | 25 | 58 | 145 |
| 586 | heredity | 5 | 25 | 602 | 1478 |
| 586 | DNA | 2 | 25 | 975 | 1354 |
| 594 | Environmental Ethics | 9 | 24 | 42 | 247 |
| 594 | Numerical Analysis | 4 | 24 | 2419 | 3267 |
| 594 | Intelligent Control Systems | 7 | 24 | 727 | 1634 |
| 594 | Adaptive control systems | 1 | 24 | 1145 | 970 |
| 594 | personality | 2 | 24 | 1932 | 2693 |
| 594 | telemarketing | 1 | 24 | 197 | 310 |
| 594 | Aging | 1 | 24 | 5476 | 5196 |
| 594 | packaging | 2 | 24 | 186 | 336 |
| 602 | Coastal zone management | 1 | 23 | 1398 | 1548 |
| 602 | Computer-Aided Design | 1 | 23 | 2444 | 2322 |
| 602 | healthcare disparities | 1 | 23 | 1200 | 1260 |
| 602 | Socioeconomic Factors | 1 | 23 | 1731 | 1993 |
| 602 | Edible plants | 5 | 23 | 131 | 737 |
| 602 | Emulsions | 5 | 23 | 266 | 670 |
| 602 | Marine resources | 1 | 23 | 1424 | 1592 |
| 602 | Fibers | 4 | 23 | 93 | 143 |
| 610 | Cytogenetics | 3 | 22 | 2043 | 3616 |
| 610 | Cognitive Behavioral Therapy | 1 | 22 | 500 | 595 |
| 610 | Cognitive Therapy | 1 | 22 | 1289 | 1357 |
| 610 | Happiness | 3 | 22 | 448 | 1089 |
| 610 | Child psychology | 3 | 22 | 1844 | 3097 |
| 610 | Library Science | 3 | 22 | 1552 | 1574 |
| 610 | behavior therapy | 1 | 22 | 1645 | 1754 |
| 610 | psychotherapy | 1 | 22 | 2607 | 2540 |
| 610 | ecotourism | 2 | 22 | 326 | 651 |
| 619 | Rock Mechanics | 2 | 21 | 1230 | 1639 |
| 619 | Metallic Glasses | 1 | 21 | 856 | 971 |
| 619 | Antioxidants | 1 | 21 | 1567 | 2096 |
| 619 | Oxidation-reduction | 1 | 21 | 1609 | 2220 |
| 623 | protein | 3 | 20 | 1573 | 2576 |
| 623 | Mitochondrial DNA | 7 | 20 | 82 | 316 |
| 623 | Learning | 3 | 20 | 1633 | 2774 |
| 626 | Cybernetics | 4 | 19 | 1332 | 2585 |
| 626 | Comparative Physiology | 4 | 19 | 854 | 1746 |
| 626 | Technology Assessment | 1 | 19 | 845 | 1220 |
| 626 | bioluminescence | 1 | 19 | 820 | 709 |
| 626 | Navier-Stokes equations | 1 | 19 | 319 | 251 |
| 631 | Paleontology | 3 | 18 | 1561 | 2233 |
| 631 | Clinical Immunology | 1 | 18 | 2604 | 2956 |
| 631 | Information visualization | 5 | 18 | 112 | 375 |
| 631 | Animal breeding | 2 | 18 | 1093 | 1584 |
| 631 | Food service management | 1 | 18 | 758 | 1108 |
| 631 | Decision Support Systems | 1 | 18 | 694 | 698 |
| 631 | Developmental Immunology | 1 | 18 | 1693 | 2084 |
| 631 | Computational Complexity | 6 | 18 | 787 | 1820 |
| 631 | Papermaking | 5 | 18 | 147 | 169 |
| 631 | Europe | 2 | 18 | 5067 | 5978 |
| 631 | wildlife diseases | 3 | 18 | 165 | 372 |
| 631 | Egypt | 1 | 18 | 1232 | 1473 |
| 643 | Civil Engineering | 4 | 17 | 1819 | 2678 |
| 643 | Planetary Science | 1 | 17 | 1052 | 1063 |
| 643 | landscapes | 3 | 17 | 200 | 517 |
| 643 | econometric models | 1 | 17 | 1171 | 1342 |
| 647 | Paleoclimatology | 2 | 16 | 1453 | 2190 |
| 647 | Paleoecology | 2 | 16 | 1412 | 2073 |
| 647 | Social Psychology | 2 | 16 | 3016 | 4279 |
| 647 | Fishery management | 1 | 16 | 1683 | 1839 |
| 647 | Greenhouse gases | 2 | 16 | 503 | 1065 |
| 647 | Paleogeography | 2 | 16 | 1248 | 1898 |
| 647 | Ethnology | 2 | 16 | 2281 | 2669 |
| 647 | Communication | 2 | 16 | 2995 | 3809 |
| 647 | Tropical Medicine | 2 | 16 | 2956 | 4081 |
| 656 | Nuclear Physics | 3 | 15 | 4556 | 5672 |
| 656 | Risk Management | 3 | 15 | 852 | 1972 |
| 656 | Natural resources | 2 | 15 | 1096 | 1840 |
| 656 | Child | 4 | 15 | 2891 | 5160 |
| 656 | Bifurcation Theory | 2 | 15 | 933 | 1215 |
| 656 | Methodology | 2 | 15 | 720 | 1088 |
| 656 | synthesis | 1 | 15 | 1950 | 1923 |
| 656 | children | 4 | 15 | 524 | 1253 |
| 664 | Functional Analysis | 3 | 14 | 1417 | 1945 |
| 664 | Emergency Medical Services | 2 | 14 | 1343 | 2145 |
| 664 | Higher Education | 1 | 14 | 1126 | 1223 |
| 664 | Econometrics | 3 | 14 | 1575 | 2301 |
| 664 | Genetic epidemiology | 1 | 14 | 668 | 901 |
| 664 | Heritage Tourism | 2 | 14 | 169 | 420 |
| 664 | cultural tourism | 2 | 14 | 162 | 420 |
| 664 | foods | 1 | 14 | 690 | 880 |
| 664 | Granular materials | 1 | 14 | 1207 | 1630 |
| 664 | color | 1 | 14 | 601 | 665 |
| 674 | Visual Communication | 1 | 13 | 1001 | 1031 |
| 674 | Environmental Psychology | 2 | 13 | 508 | 1170 |
| 674 | Morphology | 1 | 13 | 1649 | 1679 |
| 674 | Image enhancement | 1 | 13 | 706 | 903 |
| 674 | Reproductive toxicology | 1 | 13 | 1104 | 1444 |
| 674 | machinery | 4 | 13 | 758 | 1692 |
| 674 | Telecommunication | 4 | 13 | 2398 | 3910 |
| 674 | scholarly publishing | 1 | 13 | 369 | 388 |
| 674 | Social behavior | 3 | 13 | 1398 | 2754 |
| 683 | Software Engineering | 3 | 12 | 1228 | 1962 |
| 683 | Biogeochemical cycles | 1 | 12 | 838 | 1287 |
| 683 | Cognitive Radio Networks | 1 | 12 | 186 | 251 |
| 683 | clay | 1 | 12 | 1530 | 2143 |
| 683 | compost | 1 | 12 | 53 | 98 |
| 683 | Aggression | 2 | 12 | 671 | 1353 |
| 683 | lasers | 2 | 12 | 2777 | 3441 |
| 683 | Insect biochemistry | 1 | 12 | 911 | 1221 |
| 691 | Landscape Architecture | 2 | 11 | 220 | 308 |
| 691 | Computer Vision | 3 | 11 | 1375 | 2793 |
| 691 | Hydraulic Engineering | 2 | 11 | 1394 | 2113 |
| 691 | Nuclear Chemistry | 2 | 11 | 1649 | 2216 |
| 691 | Radiochemistry | 2 | 11 | 1562 | 2061 |
| 691 | Risk assessment | 4 | 11 | 578 | 1760 |
| 691 | Wireless Communication | 2 | 11 | 662 | 1091 |
| 691 | ecological risk assessment | 4 | 11 | 211 | 963 |
| 691 | Behavioral Finance | 1 | 11 | 143 | 265 |
| 691 | Gene expression regulation | 2 | 11 | 1618 | 2766 |
| 691 | Genetic regulation | 2 | 11 | 1834 | 3126 |
| 691 | Radioisotopes | 2 | 11 | 1923 | 2662 |
| 691 | Health Risk Assessment | 4 | 11 | 417 | 1437 |
| 704 | Statistical Mechanics | 1 | 10 | 2221 | 2119 |
| 704 | Anti-inflammatory agents | 1 | 10 | 599 | 915 |
| 704 | Immunotoxicology | 1 | 10 | 770 | 1070 |
| 704 | Inflammation | 1 | 10 | 2573 | 3518 |
| 704 | Family Therapy | 1 | 10 | 1476 | 1794 |
| 704 | child mental health | 1 | 10 | 944 | 1275 |
| 704 | Eastern Europe | 2 | 10 | 1487 | 1766 |
| 704 | Brain | 2 | 10 | 3747 | 5585 |
| 704 | Vocational guidance | 1 | 10 | 1640 | 2079 |
| 704 | counseling | 1 | 10 | 2744 | 3287 |
| 704 | Condensed Matter | 2 | 10 | 4327 | 5370 |
| 715 | Systems Theory | 5 | 9 | 479 | 1536 |
| 715 | Chronobiology | 2 | 9 | 660 | 1268 |
| 715 | Algebra | 6 | 9 | 1271 | 2048 |
| 715 | Architectural Design | 2 | 9 | 638 | 1021 |
| 715 | Combinatorial optimization | 1 | 9 | 1002 | 1066 |
| 715 | biological clocks | 2 | 9 | 660 | 1268 |
| 715 | Chemical kinetics | 2 | 9 | 1125 | 1659 |
| 715 | Molecules | 1 | 9 | 2644 | 2926 |
| 715 | Chemical processes | 1 | 9 | 1299 | 1700 |
| 715 | circadian rhythm | 2 | 9 | 660 | 1268 |
| 715 | Capital market | 1 | 9 | 803 | 1172 |
| 715 | biological rhythms | 2 | 9 | 622 | 1232 |
| 715 | Vietnam | 1 | 9 | 433 | 455 |
| 715 | Isotopes | 1 | 9 | 322 | 491 |
| 715 | cycles | 2 | 9 | 235 | 427 |
| 730 | Mechatronics | 2 | 8 | 1027 | 1912 |
| 730 | Dendrochronology | 1 | 8 | 88 | 157 |
| 730 | occupational diseases | 1 | 8 | 2081 | 3050 |
| 730 | Ubiquitous computing | 1 | 8 | 592 | 603 |
| 730 | Visual Perception | 1 | 8 | 3728 | 4626 |
| 730 | Chemical structure | 1 | 8 | 1190 | 1365 |
| 730 | Memory | 1 | 8 | 3934 | 4973 |
| 730 | Attention | 1 | 8 | 3889 | 4886 |
| 730 | economic development projects | 1 | 8 | 489 | 808 |
| 730 | Perception | 1 | 8 | 3986 | 4936 |
| 740 | Surveying | 2 | 7 | 245 | 394 |
| 740 | Database Management | 1 | 7 | 1472 | 1959 |
| 740 | Genetic translocation | 1 | 7 | 445 | 771 |
| 740 | adolescence | 1 | 7 | 1815 | 2522 |
| 740 | Adolescent Psychology | 1 | 7 | 1737 | 2391 |
| 740 | Video Games | 3 | 7 | 62 | 322 |
| 740 | marketing | 1 | 7 | 3202 | 3874 |
| 740 | plasmids | 1 | 7 | 445 | 771 |
| 740 | Philippines | 1 | 7 | 313 | 417 |
| 749 | Audiology | 1 | 6 | 1535 | 2085 |
| 749 | Comparative Education | 1 | 6 | 616 | 793 |
| 749 | Emerging infectious diseases | 1 | 6 | 777 | 1411 |
| 749 | Adsorption | 1 | 6 | 485 | 730 |
| 749 | Education and globalization | 1 | 6 | 62 | 82 |
| 749 | Real Estate Investment | 1 | 6 | 345 | 495 |
| 749 | International Education | 1 | 6 | 532 | 871 |
| 749 | Portfolio Management | 1 | 6 | 685 | 786 |
| 749 | reasoning | 1 | 6 | 850 | 1103 |
| 749 | Aquatic animals | 1 | 6 | 466 | 792 |
| 749 | Transnational education | 1 | 6 | 62 | 82 |
| 749 | biological monitoring | 1 | 6 | 1160 | 1918 |
| 749 | herbicides | 1 | 6 | 576 | 869 |
| 749 | educational innovations | 1 | 6 | 1074 | 1458 |
| 749 | real estate | 1 | 6 | 144 | 224 |
| 764 | Biostatistics | 2 | 5 | 278 | 616 |
| 764 | Computational Chemistry | 1 | 5 | 1319 | 1870 |
| 764 | Thermodynamics | 2 | 5 | 1711 | 2685 |
| 764 | Chemical Ecology | 1 | 5 | 1032 | 1628 |
| 764 | Nondestructive testing | 1 | 5 | 1370 | 1898 |
| 764 | Veterinary Pathology | 1 | 5 | 717 | 999 |
| 764 | Regional Planning | 2 | 5 | 2201 | 3704 |
| 764 | Operations Research | 2 | 5 | 2941 | 4592 |
| 764 | Thin Films | 1 | 5 | 1254 | 1728 |
| 764 | Superconductors | 1 | 5 | 1216 | 1516 |
| 764 | Genetic databases | 1 | 5 | 140 | 253 |
| 764 | Social Systems | 2 | 5 | 332 | 765 |
| 764 | Superconductivity | 1 | 5 | 916 | 1201 |
| 764 | Ceramic materials | 1 | 5 | 2455 | 3301 |
| 764 | Crystallography | 2 | 5 | 2388 | 3150 |
| 764 | pheromones | 1 | 5 | 957 | 1534 |
| 764 | Southeast Asia | 2 | 5 | 640 | 1155 |
| 764 | atmospheric models | 1 | 5 | 1239 | 1820 |
| 782 | Cosmology | 1 | 4 | 2297 | 2533 |
| 782 | Cryptography | 3 | 4 | 747 | 1541 |
| 782 | Particle Physics | 1 | 4 | 1463 | 1607 |
| 782 | Stochastic Processes | 1 | 4 | 1798 | 2409 |
| 782 | Labor Economics | 1 | 4 | 992 | 1384 |
| 782 | Agricultural Biotechnology | 1 | 4 | 701 | 865 |
| 782 | Crystallization | 1 | 4 | 1095 | 1452 |
| 782 | Photogrammetry | 3 | 4 | 1072 | 1892 |
| 782 | Cross-Cultural Studies | 1 | 4 | 1499 | 2279 |
| 782 | Mass Spectrometry | 1 | 4 | 2369 | 3365 |
| 782 | Food inspection | 1 | 4 | 101 | 238 |
| 782 | Industrial Policy | 1 | 4 | 974 | 1437 |
| 782 | Formal Languages | 1 | 4 | 522 | 639 |
| 782 | Taste | 1 | 4 | 664 | 1180 |
| 782 | forest conservation | 3 | 4 | 5 | 11 |
| 782 | Sound | 1 | 4 | 1780 | 2058 |
| 782 | smell | 1 | 4 | 664 | 1180 |
| 782 | X-ray crystallography | 1 | 4 | 1120 | 1498 |
| 782 | Metallography | 1 | 4 | 1591 | 2284 |
| 782 | industrial relations | 1 | 4 | 1600 | 2146 |
| 782 | innovation | 1 | 4 | 1198 | 1898 |
| 782 | cross-cultural comparison | 1 | 4 | 1210 | 1921 |
| 782 | Food preferences | 1 | 4 | 789 | 1348 |
| 782 | California | 2 | 4 | 649 | 1291 |
| 782 | food quality | 1 | 4 | 101 | 238 |
| 782 | Grasslands | 1 | 4 | 175 | 292 |
| 808 | Archaeology | 1 | 3 | 2502 | 3109 |
| 808 | Language Disorders | 1 | 3 | 1632 | 2403 |
| 808 | Psycholinguistics | 1 | 3 | 1743 | 2564 |
| 808 | Sedimentology | 1 | 3 | 1258 | 1958 |
| 808 | Distributed Databases | 1 | 3 | 349 | 570 |
| 808 | Speech Perception | 1 | 3 | 515 | 953 |
| 808 | auditory perception | 1 | 3 | 662 | 1151 |
| 808 | Freeze-Drying | 9 | 3 | 246 | 1540 |
| 808 | Hypothermia | 9 | 3 | 246 | 1540 |
| 808 | Freeze Drying | 9 | 3 | 246 | 1540 |
| 808 | Sports | 1 | 3 | 3730 | 4466 |
| 808 | Proteome | 1 | 3 | 2360 | 3549 |
| 808 | Medical innovations | 4 | 3 | 1149 | 3607 |
| 808 | Latin America | 1 | 3 | 2436 | 2716 |
| 808 | Writing | 1 | 3 | 534 | 899 |
| 808 | school environment | 1 | 3 | 223 | 489 |
| 808 | Reading | 1 | 3 | 1028 | 1498 |
| 808 | Oral communication | 1 | 3 | 881 | 1450 |
| 808 | Speech | 1 | 3 | 1720 | 2545 |
| 827 | Biosensors | 1 | 2 | 2391 | 3720 |
| 827 | Fluid Dynamics | 1 | 2 | 2173 | 3166 |
| 827 | Aerial Photography | 1 | 2 | 34 | 91 |
| 827 | housing policy | 1 | 2 | 269 | 506 |
| 827 | Urban Transportation | 1 | 2 | 420 | 871 |
| 827 | Diagnostic Imaging | 2 | 2 | 3233 | 5758 |
| 827 | Organometallic compounds | 1 | 2 | 2122 | 2944 |
| 827 | Mortgages | 1 | 2 | 439 | 743 |
| 827 | Wind power | 1 | 2 | 683 | 1180 |
| 827 | peptides | 1 | 2 | 1916 | 2964 |
| 827 | Bioelectronics | 1 | 2 | 2094 | 3274 |
| 827 | North America | 1 | 2 | 1985 | 3040 |
| 827 | Imaging systems | 2 | 2 | 1170 | 2499 |
| 827 | multimedia | 1 | 2 | 409 | 720 |
| 827 | cryosphere | 1 | 2 | 744 | 1221 |
| 827 | Youth | 1 | 2 | 1316 | 2157 |
| 827 | Interactive multimedia | 1 | 2 | 729 | 1243 |
| 827 | mammals | 1 | 2 | 2109 | 3073 |
| 827 | winds | 1 | 2 | 301 | 535 |
| 827 | smart structures | 3 | 2 | 93 | 485 |
| 827 | Vaccines | 1 | 2 | 3691 | 5453 |
| 848 | Medical Technology | 3 | 1 | 2411 | 6303 |
| 848 | Applied Mathematics | 1 | 1 | 1955 | 2509 |
| 848 | Astronomy | 1 | 1 | 4231 | 5566 |
| 848 | Ergonomics | 1 | 1 | 2128 | 3073 |
| 848 | Probability | 1 | 1 | 1264 | 2153 |
| 848 | Nonverbal Communication | 1 | 1 | 405 | 797 |
| 848 | Organizational learning | 1 | 1 | 1268 | 2243 |
| 848 | Heterocyclic chemistry | 1 | 1 | 1158 | 1809 |
| 848 | consumer behavior | 1 | 1 | 1070 | 1824 |
| 848 | Lipid metabolism | 1 | 1 | 946 | 1640 |
| 848 | Integrated Circuits | 2 | 1 | 1133 | 2125 |
| 848 | Expert Systems | 1 | 1 | 539 | 1198 |
| 848 | Behavioral research | 1 | 1 | 1193 | 2330 |
| 848 | Body language | 1 | 1 | 240 | 560 |
| 848 | Functional foods | 2 | 1 | 594 | 1654 |
| 848 | Helminthology | 1 | 1 | 372 | 725 |
| 848 | Quantum Optics | 1 | 1 | 1622 | 2295 |
| 848 | Knowledge management | 1 | 1 | 1504 | 2474 |
| 848 | Financial management | 1 | 1 | 1111 | 2051 |
| 848 | Risk | 1 | 1 | 1230 | 2157 |
| 848 | Lipid | 1 | 1 | 951 | 1648 |
| 848 | free radicals | 1 | 1 | 2758 | 3877 |
| 848 | Helminths | 1 | 1 | 372 | 725 |
| 848 | Atomic spectroscopy | 1 | 1 | 2079 | 2944 |
| 848 | Laser Spectroscopy | 1 | 1 | 1540 | 2207 |
| 848 | gardens | 1 | 1 | 91 | 139 |
| 848 | Decision making | 1 | 1 | 3214 | 5155 |
| 875 | Geometry | 2 | 0 | 1641 | 2721 |
| 875 | Ceramics | 1 | 0 | 2726 | 3950 |
| 875 | Tissue Engineering | 1 | 0 | 716 | 1360 |
| 875 | Marine Meteorology | 1 | 0 | 656 | 1090 |
| 875 | International Law | 3 | 0 | 439 | 1067 |
| 875 | Industrial Ecology | 1 | 0 | 418 | 906 |
| 875 | Viticulture | 1 | 0 | 287 | 611 |
| 875 | Ocean-atmosphere interaction | 1 | 0 | 220 | 459 |
| 875 | Nonlinear Optics | 1 | 0 | 626 | 1082 |
| 875 | Noise control | 1 | 0 | 677 | 717 |
| 875 | isomerism | 1 | 0 | 756 | 1405 |
| 875 | Soviet Union | 1 | 0 | 1625 | 2533 |
| 875 | Amphibians | 1 | 0 | 712 | 1181 |
| 875 | Reptiles | 1 | 0 | 777 | 1233 |
| 875 | Chirality | 1 | 0 | 756 | 1405 |
| 875 | Cancer | 1 | 0 | 6448 | 8729 |
