Classification
CLPS - Organic colloids, membranes
6
CWSW - Membrane separation process
6
FNP - Ceramics - specific materials
3
CXA - Coal and fossil fuel - chemistry and technology
2
EEA - Coal - general
2
ETFG - Polymer electrolyte membrane fuel cells ( PEMFC )
2
TKF - Power plants
2
UKA - Environmental damage and energy production
2
UKE - Environment and energy resources
2
UML - Air pollution by special sources
2
LMQ - Biophysics - membranes
1