Earth & Environmental Sciences
gene
100%
nitrite
97%
oxygen
90%
nitrification
82%
nitrogen
81%
ammonia
80%
oxidation
78%
bacterium
77%
ammonium
76%
denitrification
74%
nitrous oxide
68%
nitrate
62%
phytoplankton
47%
ocean
46%
rate
44%
community composition
39%
water column
39%
nitrogen cycle
33%
sediment
30%
incubation
27%
sea
25%
assimilation
25%
DNA
23%
loss
22%
water
22%
microbial community
20%
substrate
20%
methane
20%
algal bloom
19%
marine environment
19%
upwelling
19%
detection
18%
distribution
18%
clone
17%
nitrifying bacterium
17%
surface water
17%
diatom
17%
probe
16%
organic matter
16%
metabolism
15%
euphotic zone
15%
phylogenetics
15%
consumption
15%
North Atlantic Ocean
15%
library
14%
genome
13%
cell
13%
seawater
13%
experiment
13%
estuary
13%
tracer
12%
summer
12%
Antarctica
12%
nutrient
12%
lake
12%
saltmarsh
12%
gene expression
12%
fixation
11%
station
11%
otolith
11%
kinetics
11%
budget
10%
analysis
10%
organism
10%
inorganic nitrogen
10%
assay
10%
salinity
10%
coastal water
10%
organic carbon
10%
niche
9%
photic zone
9%
coastal sediment
9%
carbon
9%
estuarine sediment
9%
genetic diversity
9%
isotope
9%
dissolved organic nitrogen
9%
anoxia
9%
in situ
9%
amplification
9%
mesocosm
9%
enzyme
9%
ice
8%
greenhouse gas
8%
genomics
8%
vertical distribution
8%
copper
8%
sea surface
8%
fractionation
8%
world
8%
nitric oxide
7%
community structure
7%
stable isotope
7%
environmental factor
7%
oxidation-reduction
7%
winter
7%
amino acid
7%
mixed layer
7%
surface layer
6%
atmosphere
6%
Agriculture & Biology
ammonia
68%
denitrification
63%
nitrification
57%
oxygen
55%
nitrogen
49%
phytoplankton
49%
oceans
49%
sediments
47%
nitrites
44%
bacteria
44%
ammonium
43%
oxidation
43%
genes
38%
Chesapeake Bay
37%
nitrous oxide
37%
anaerobic ammonium oxidation
36%
denitrifying bacteria
33%
nitrates
31%
nitrogen cycle
31%
nitrite reductase
29%
Nitrosococcus oceani
26%
water
24%
Arabian Sea
22%
marine environment
21%
nitrate reductase
20%
Bacillariophyceae
20%
nitrifying bacteria
19%
Proteobacteria
19%
methane
19%
sampling
18%
surface water
17%
nitrous oxide production
17%
lakes
17%
euphotic zone
17%
microbial communities
17%
dissolved organic nitrogen
16%
oxidants
16%
nitrogen-fixing bacteria
16%
Antarctica
16%
Nitrosomonas europaea
15%
ribosomal RNA
15%
Archaea
14%
estuaries
14%
coastal sediments
13%
estuarine sediments
13%
ice
13%
nitrogen fixation
12%
seawater
12%
DNA
12%
fluorescent antibody technique
12%
clones
12%
ammonia monooxygenase
12%
phylogeny
12%
salinity
11%
organic carbon
11%
Sargasso Sea
10%
environmental factors
10%
ecological differentiation
10%
bacterial communities
10%
Pseudomonas stutzeri
10%
kinetics
9%
nutrients
9%
copper
9%
organisms
9%
Nitrosococcus
9%
community structure
9%
microorganisms
9%
aquatic bacteria
9%
Nitrosomonas
8%
hybridization
8%
English Channel
8%
summer
8%
DNA microarrays
8%
tracer techniques
8%
marine sediments
8%
dissolved inorganic nitrogen
7%
assimilation (physiology)
7%
Atlantic Ocean
7%
metabolism
7%
Nitrosococcus halophilus
7%
benzoates
7%
aquatic environment
7%
methodology
6%
Nitrospina
6%
genome
6%
Peru
6%
winter
6%
Dunaliella tertiolecta
6%
Choptank River
6%
gene expression
6%
Synechococcus
6%
Nitrobacter
6%
basins
6%
Nitrobacter hamburgensis
6%
carbon dioxide fixation
6%
genetic variation
6%
coasts
6%
primary productivity
5%
Pacific Ocean
5%
carbon
5%
Medicine & Life Sciences
Ammonia
83%
Bacteria
59%
Nitrogen
59%
Oceans and Seas
56%
Denitrification
48%
Nitrification
48%
Nitrogen Cycle
43%
Ammonium Compounds
36%
Nitrite Reductases
32%
Oxygen
31%
Bays
31%
Genes
31%
Nitrites
26%
Proteobacteria
23%
Water
20%
Archaea
19%
Nitrous Oxide
19%
Phytoplankton
17%
Microbiota
16%
Nitrosomonas europaea
15%
Nitrosomonas
15%
ammonia monooxygenase
15%
Seawater
15%
Polymerase Chain Reaction
14%
Oligonucleotide Array Sequence Analysis
12%
Ecosystem
12%
16S Ribosomal RNA
11%
Pseudomonas stutzeri
11%
Nitrogen Fixation
10%
DNA
9%
Greenhouse Gases
9%
Genome
9%
Salinity
8%
Isotopes
8%
Clone Cells
8%
Wetlands
8%
Nitrobacter
8%
Estuaries
7%
Ribosomal DNA
7%
Nitrates
7%
Geologic Sediments
7%
Pacific Ocean
7%
chlorite dismutase
7%
Carbon
6%
Nutrients
6%
rRNA Genes
6%
Soil
6%
Rivers
6%
Metagenome
6%
benzoyl-coenzyme A
6%
Chromatiaceae
6%
Paramphistomatidae
6%
fluoromethane
6%
Fresh Water
6%
Environmental Microbiology
6%
Synechococcus
6%
dimethyl ether
6%
nitric-oxide reductase
5%
Gulf of Mexico
5%
Sequence Analysis
5%
Sequoia
5%
Genetic Variation
5%
Diatoms
5%
Kinetics
5%
Methyl Ethers
5%
Nitrogenase
5%
Growth
5%
Immunomagnetic Separation
5%
Gases
5%
Gene Expression
5%
arsenic acid
5%
