- Materials Science, general 10
- Soil Science & Conservation 7
- Applied and Technical Physics 6
- Inorganic Chemistry 6
- Materials Engineering 6
- Nanotechnology 6
- Characterization and Evaluation of Materials 5
- Ecotoxicology 5
- Electronics and Microelectronics, Instrumentation 5
- Environmental Chemistry 5
- Environmental Health 5
- Pollution, general 5
- Solid State Physics 5
- Measurement Science and Instrumentation 4
- Spectroscopy and Microscopy 4
- Communications Engineering, Networks 3
- Computer Communication Networks 3
- Environment, general 3
- Hydrogeology 3
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 3