Classification
ETF - Fuel cells - general
280
ESB - Hydrogen energy
26
TKJ - Traffic
24
ETC - Energy conversion
19
CNW - Electrochemical energy production and conversion
15
CXX - Hydrogen production - chemistry and technology
10
CNWK - Electric batteries
8
TKH - Air flight, space flight
8
UHK - Traffic and environment - incl. automobile exhaust gas
8
CNR - Electrodes
6
CNJ - Electrochemistry - comprehensive works
5
ETA - Energy storage
5
EVP - Energy models, energy system analysis
5
CNU - Electrochemical synthesis, electrochemical engineering
4
CXA - Coal and fossil fuel - chemistry and technology
4
EUU - Cogeneration
4
CH - Physical chemistry
3
CLJ - Catalyst materials
3
CLM - Catalytic processes
3
CNWE - Electrochemical cells
3
EBA - Energy production, energy technology
3
ENA - Energy from biomass and waste
3
ETFD - Solid oxide fuel cells ( SOFC )
3
EWA - Energy economy
3
FNPH - Ceramics for specific applications
3
THN - Heat exchanger
3
CLJE - Catalyst characterization and surface phenomena
2
CNE - Electrochemistry
2
CNO - Electrolytes
2
CWSW - Membrane separation process
2
EIP - Photovoltaics
2
EPK - Nuclear energy
2
EXA - Energy policy
2
LHH - Microbiology - methods
2
TIG - Reliability, safety, quality control
2
TNA - Nuclear engineering - general
2
UKA - Environmental damage and energy production
2
CAN - Chemistry - mathematical methods, computer applications
1
CLPS - Organic colloids, membranes
1
CNLH - Organic electrochemistry
1
CWB - Chemical engineering - comprehensive works
1
CWE - Chemical engineering, chemical industry - general
1
CWGH - Chemical plants - development, optimization, process control
1
CWGP - Chemical engineering - energy aspects
1
CXRU - Synthetic fuels
1
CXXE - Thermal and photochemical hydrogen production
1
EAD - Energy - comprehensive works
1
ETFK - Direct methanol fuel cells ( DMFC )
1
ETFP - Fuel cell construction and modeling
1
EUC - Energy conservation - civil engineering
1
more ...