Earth & Environmental Sciences
biomarker
100%
lipid
72%
carbon isotope
67%
alkane
50%
isotopic composition
47%
sediment
42%
carbon
41%
Olduvai event
41%
basin
37%
alkenone
34%
organic matter
34%
Paleocene
31%
wax
30%
Eocene
28%
fractionation
27%
isotope
27%
organic carbon
26%
gorge
26%
sulfur
23%
total organic carbon
23%
water column
23%
Black Sea
22%
Miocene
21%
isoprenoid
21%
cyanobacterium
21%
climate
20%
angiosperm
19%
fossil
18%
chlorin
18%
carbonate
17%
Cretaceous
17%
aridity
17%
lake
16%
organic acid
16%
vegetation
16%
oxidation
15%
Holocene
15%
sulfide
15%
phytoplankton
15%
isotopic fractionation
15%
porphyrin
14%
ecosystem
14%
hydrogen isotope
14%
methane
14%
mass spectrometry
14%
lacustrine deposit
14%
kerogen
13%
Pleistocene
13%
alga
13%
carbon cycle
13%
Chemical Compounds
Biological Marker
62%
Lipid
46%
Organic Carbon
40%
Fractionation
36%
Organic Matter
34%
Leaf Like Crystal
29%
Isotope
27%
Black
26%
Ecosystem
23%
Isoprenoid
23%
Carbon Atom
23%
Soil
22%
Phytane
22%
Pristane
18%
Organic Acid
15%
Kerogen
14%
Wax
14%
Carbonate
13%
Porphyrin
12%
Hydrocarbon
12%
Column Like Crystal
12%
Soil Organic Matter
11%
Triterpenoid
11%
Surface Water
11%
Environment
11%
Diterpenoid
10%
Salinity
10%
Glycerol
10%
Chlorins
10%
Nutrient
10%
Mineral
10%
Terpenoid
9%
Gas
9%
Arene
9%
Evaporation
8%
Particulate Organic Matter
8%
Fire
8%
Oil Field Water
8%
Chlorobactene
8%
Sedimentary Organic Matter
7%
Hopanoid
7%
Isorenieratene
7%
Carbon Cycle
6%
Sulfide
6%
Gas Chromatography Mass Spectrometry (GCMS)
6%
Scytonemin
6%
Isotope Effect
6%
Sulfur Cycle
6%
Acetic Acid
6%
Mass Spectrometry
6%
Agriculture & Biology
biomarkers
27%
basins
18%
methane
16%
sediments
16%
tuff
15%
climate
14%
lakes
14%
climate change
13%
Tanzania
11%
total organic carbon
11%
carbon
11%
carbon isotopes
10%
dimethyl sulfide
10%
organic matter
10%
nitrogen cycle
9%
lipids
9%
Eastern Africa
9%
oxidation
8%
wet environmental conditions
8%
Methanosarcina acetivorans
8%
hopanoids
7%
methanotrophs
7%
dry environmental conditions
7%
geochemistry
7%
organic carbon
7%
lacustrine sediments
6%
soil
6%
nitrogen
6%
Cyanobacteria
6%
Archaea
6%
chlorins
5%
Chromatiaceae
5%
fossils
5%
Euryarchaeota
5%
Methanosarcina
5%
methanogens
5%
herding
5%