Subject
tracer technique
10
isotope application
4
isotope
3
pollutant transport
3
soil
3
PET (positron emission tomography)
2
aquifer
2
autoradiography
2
ecosystem
2
environmental transport
2
equilibrium
2
fractionation
2
groundwater
2
hydrobiology
2
isotope ratio
2
kinetics
2
labeled compound
2
liquid scintillation counting
2
liquids
2
partitioning
2
plant
2
radioisotope
2
stable isotope
2
transpiration
2
transport properties
2
vapor
2
water
2
atmosphere
1
atmospheric circulation
1
atmospheric precipitation
1
case study
1
chromatography
1
environmental chemistry
1
environmental research
1
hydrobiophysics
1
hydrology
1
hydrosphere
1
isotope geochemistry
1
labeling
1
modeling
1
radiobiology
1
radiochemistry
1
radiodiagnosis
1
radionuclide migration
1
radiopharmaceutical
1
serotonin
1
tritium
1