Medicine & Life Sciences
Carbon
7%
Carbon Isotopes
7%
Dermatoglyphics
9%
Greenhouse Gases
13%
Hydrogen
73%
Isotopes
68%
Methane
86%
Nitrogen
27%
Nitrogen Fixation
6%
Nitrogenase
100%
Noble Gases
5%
Rhodopseudomonas
7%
Vanadium
5%
Agriculture & Biology
carbon
5%
carbon dioxide
6%
greenhouse gases
9%
hydrogen
57%
isotope fractionation
89%
methane
61%
methane production
8%
microorganisms
10%
nitrogen
16%
nitrogenase
70%
Rhodopseudomonas palustris
5%
vanadium
5%
Earth & Environmental Sciences
biogeochemical cycle
7%
biological nitrogen fixation
9%
byproduct
5%
carbon
7%
carbon isotope
5%
energy
6%
enzyme
10%
fractionation
52%
greenhouse gas
10%
hydrogen isotope
76%
isotopic composition
5%
isotopic fractionation
7%
methane
48%
methanogenesis
7%
microbial community
5%
nitrogen
26%
stable isotope
5%
vanadium
7%