1123 | Humans |
1019 | Salix |
689 | Animals |
596 | Male |
586 | Female |
332 | Adult |
322 | Plant Leaves |
298 | Middle Aged |
280 | Biodegradation, Environmental |
274 | Soil Pollutants |
234 | Trees |
225 | Plant Roots |
221 | Soil |
210 | Ecosystem |
200 | Biomass |
190 | Aged |
185 | United States |
174 | Plant Extracts |
163 | Seasons |
148 | Populus |
147 | Plants |
139 | Environmental Monitoring |
136 | Time Factors |
123 | Metals, Heavy |
121 | Species Specificity |
118 | Young Adult |
109 | Phylogeny |
103 | China |
97 | Adolescent |
96 | Plant Bark |
95 | Water |
95 | Treatment Outcome |
93 | Temperature |
88 | Cadmium |
86 | Veterans |
83 | Sequence Analysis, DNA |
78 | Nitrogen |
78 | Molecular Sequence Data |
76 | Substance-Related Disorders |
76 | Birds |
75 | Phytotherapy |
72 | Soil Microbiology |
71 | Water Pollutants, Chemical |
70 | United States Department of Veterans Affairs |
70 | Reproducibility of Results |
69 | Pollen |
69 | Glucosides |
67 | Rats |
66 | Plant Stems |
66 | Genetic Variation |
65 | Zinc |
65 | Coleoptera |
64 | Stress Disorders, Post-Traumatic |
64 | Plants, Medicinal |
63 | Aged, 80 and over |
61 | Population Dynamics |
60 | Conservation of Natural Resources |
60 | Chromatography, High Pressure Liquid |
59 | Wood |
57 | Surveys and Questionnaires |
57 | Phenols |
57 | Climate Change |
57 | Arctic Regions |
55 | Genotype |
54 | Larva |
54 | Benzyl Alcohols |
54 | Adaptation, Physiological |
53 | Kinetics |
52 | Anti-Inflammatory Agents, Non-Steroidal |
51 | Mice |
50 | Photosynthesis |
50 | Carbon |
49 | Retrospective Studies |
49 | Hydrogen-Ion Concentration |
49 | Copper |
49 | Air Pollutants |
48 | Plant Shoots |
48 | Dose-Response Relationship, Drug |
47 | Models, Biological |
46 | Plant Transpiration |
45 | Fungi |
45 | Bacteria |
43 | Rivers |
43 | Risk Factors |
43 | Antioxidants |
42 | Poaceae |
42 | Hydroponics |
42 | Gas Chromatography-Mass Spectrometry |
42 | Aspirin |
42 | Alcoholism |
41 | Home Care Services |
41 | Analgesics, Opioid |
40 | Plant Diseases |
40 | Mycorrhizae |
40 | Lead |
40 | History, 19th Century |
40 | Flavonoids |
39 | Biodiversity |
38 | Substance Abuse Detection |
38 | Plant Proteins |
38 | Molecular Structure |
38 | Geologic Sediments |
38 | Betula |
37 | Reproduction |
37 | History, 20th Century |
36 | Lignin |
36 | Environmental Restoration and Remediation |
36 | Charcoal |
36 | Agriculture |
35 | Randomized Controlled Trials as Topic |
35 | Phosphorus |
35 | Follow-Up Studies |
35 | Double-Blind Method |
35 | DNA, Fungal |
35 | Climate |
35 | Allergens |
35 | Adsorption |
34 | Wetlands |
34 | Feeding Behavior |
34 | Europe |
34 | Child |
34 | Base Sequence |
34 | Age Factors |
33 | Sweden |
33 | Severity of Illness Index |
33 | Salicylates |
33 | Models, Theoretical |
33 | Herbivory |
33 | Chromatography, Liquid |
32 | Mental Disorders |
32 | Gene Expression Regulation, Plant |
32 | Environment |
32 | Crops, Agricultural |
31 | Salicaceae |
31 | Mining |
31 | Magnoliopsida |
31 | Evolution, Molecular |
31 | Chlorophyll |
31 | Basidiomycota |
31 | Analysis of Variance |
30 | Tandem Mass Spectrometry |
30 | Sex Factors |
30 | Illicit Drugs |
30 | Hybridization, Genetic |
30 | Glycosides |
30 | Environmental Pollution |
30 | Canada |
29 | United Kingdom |
29 | Trace Elements |
29 | Seedlings |
29 | Refuse Disposal |
29 | Prevalence |
29 | Diet |
29 | Cross-Sectional Studies |
29 | California |
29 | Biofuels |
28 | Songbirds |
28 | Prospective Studies |
28 | Geography |
28 | Food Chain |
28 | Anti-Bacterial Agents |
28 | Amino Acid Sequence |
27 | Water Movements |
27 | Sensitivity and Specificity |
27 | Rhizosphere |
27 | Polymerase Chain Reaction |
27 | Phenotype |
27 | Metals |
27 | Mass Spectrometry |
27 | History, 18th Century |
27 | Genome, Plant |
27 | Forensic Toxicology |
27 | Environmental Pollutants |
27 | Carbon Dioxide |
27 | Altitude |
26 | Water Purification |
26 | Stress, Physiological |
26 | Plant Preparations |
26 | Oxidative Stress |
26 | Genetic Markers |
26 | Flowers |
26 | Ascomycota |
25 | Waste Disposal, Fluid |
25 | Sewage |
25 | Polycyclic Aromatic Hydrocarbons |
25 | Plant Development |
25 | Light |
25 | Internet |
25 | Genes, Plant |
25 | Forests |
25 | Ecology |
25 | DNA, Ribosomal |
25 | DNA, Plant |
25 | Child, Preschool |
25 | Analgesics |
24 | Volatile Organic Compounds |
24 | RNA, Ribosomal, 16S |
24 | Primary Health Care |
24 | Pain |
24 | Norway |
24 | Microsatellite Repeats |
24 | DNA, Ribosomal Spacer |
24 | Brain |
24 | Biological Evolution |
24 | Anti-Inflammatory Agents |
23 | Risk Assessment |
23 | Quality of Life |
23 | Predatory Behavior |
23 | Patient Acceptance of Health Care |
23 | Gene Expression Profiling |
23 | Biological Transport |
23 | Aging |
22 | Forestry |
22 | Fluorescent Dyes |
22 | Cost-Benefit Analysis |
22 | Comorbidity |
22 | Community Health Nursing |
22 | Chronic Disease |
22 | Algorithms |
21 | Signal Transduction |
21 | Salicylic Acid |
21 | Regression Analysis |
21 | History, Ancient |
21 | Genetics, Population |
21 | Fresh Water |
21 | Desert Climate |
21 | Cells, Cultured |
21 | Calcium |
21 | Biomarkers |
21 | Arsenic |
20 | Social Support |
20 | Sequence Alignment |
20 | Seeds |
20 | Poland |
20 | Magnetic Resonance Spectroscopy |
20 | Galliformes |
20 | Ethanol |
20 | DNA, Bacterial |
20 | Cohort Studies |
20 | Cell Survival |
20 | Cattle |
20 | Cannabinoids |
20 | Alcohol Drinking |
19 | Practice Guidelines as Topic |
19 | Longitudinal Studies |
19 | Hydrolysis |
19 | Host-Parasite Interactions |
19 | Gene Expression Regulation |
19 | Fertilizers |
19 | Clinical Trials as Topic |
19 | Bees |
19 | Adaptation, Psychological |
18 | Veterans Health |
18 | Socioeconomic Factors |
18 | Research Design |
18 | Oxidation-Reduction |
18 | Microbial Sensitivity Tests |
18 | Low Back Pain |
18 | Liver |
18 | Limit of Detection |
18 | Japan |
18 | Insecta |
18 | Hymenoptera |
18 | Disease Models, Animal |
18 | DNA, Mitochondrial |
18 | Chromosome Mapping |
18 | Cell Line, Tumor |
18 | Alleles |
17 | Zea mays |
17 | Visual Cortex |
17 | Tissue Distribution |
17 | Symbiosis |
17 | Solvents |
17 | Snow |
17 | Reference Standards |
17 | Rain |
17 | Quercus |
17 | Psychotherapy |
17 | Program Evaluation |
17 | Patient Education as Topic |
17 | Passeriformes |
17 | Oviposition |
17 | Hydrocarbons |
17 | HIV Infections |
17 | Cluster Analysis |
17 | Cities |
17 | Calibration |
17 | Biological Availability |
17 | Behavior, Animal |
17 | Apoptosis |
17 | Alaska |
16 | Tundra |
16 | Tumor Necrosis Factor-alpha |
16 | Transcriptome |
16 | Stress, Psychological |
16 | Population Density |
16 | Patient Care Team |
16 | Pain Measurement |
16 | Pain Management |
16 | Osteoarthritis |
16 | Opioid-Related Disorders |
16 | North America |
16 | Military Personnel |
16 | Mental Health Services |
16 | Medicare |
16 | Iron |
16 | Industrial Waste |
16 | Hot Temperature |
16 | Germination |
16 | Environmental Exposure |
16 | Demography |
16 | DNA Barcoding, Taxonomic |
16 | Computer Simulation |
16 | Cold Temperature |
16 | Cognitive Behavioral Therapy |
16 | Cellulose |
16 | Administration, Oral |
15 | Triticum |
15 | Tannins |
15 | Superoxide Dismutase |
15 | Russia |
15 | RNA, Messenger |
15 | Quality of Health Care |
15 | Proanthocyanidins |
15 | Polymorphism, Genetic |
15 | Plants, Edible |
15 | Pilot Projects |
15 | Particulate Matter |
15 | Motivation |
15 | Moths |
15 | Microscopy, Electron, Scanning |
15 | Linear Models |
15 | Italy |
15 | Health Care Costs |
15 | Drug Overdose |
15 | Droughts |
15 | Dietary Supplements |
15 | Diarrhea |
15 | Depression |
15 | Deer |
15 | Chromatography, Thin Layer |
15 | Cats |
15 | Anti-Infective Agents |
14 | Waste Water |
14 | Skin Tests |
14 | Reactive Oxygen Species |
14 | Qualitative Research |
14 | Polyphenols |
14 | Polymorphism, Restriction Fragment Length |
14 | Organ Size |
14 | Models, Genetic |
14 | Magnetic Resonance Imaging |
14 | Language |
14 | Hospitalization |
14 | Health Services Accessibility |
14 | Germany |
14 | Finland |
14 | England |
14 | Delivery of Health Care |
14 | Cyclooxygenase Inhibitors |
14 | Colitis, Ulcerative |
14 | Chromium |
14 | Chromatography, Gas |
14 | Arabidopsis |
14 | Air Pollution |
13 | Xylem |
13 | Water Pollutants |
13 | Volatilization |
13 | Silicon Dioxide |
13 | Remission Induction |
13 | Reference Values |
13 | Rats, Wistar |
13 | Polymorphism, Single Nucleotide |
13 | Pinus |
13 | Patient Satisfaction |
13 | Outcome Assessment, Health Care |
13 | Nickel |
13 | Neoplasms |
13 | Luteinizing Hormone |
13 | Insecticides |
13 | In Vitro Techniques |
13 | Home Health Nursing |
13 | Groundwater |
13 | Greenhouse Effect |
13 | Flow Cytometry |
13 | Evidence-Based Practice |
13 | Diagnosis, Differential |
13 | Crosses, Genetic |
13 | Crohn Disease |
13 | Communication |
13 | Cold Climate |
13 | Cognition |
13 | Cesium Radioisotopes |
13 | Cell Line |
13 | Cardiovascular Diseases |
13 | Carbon Isotopes |
13 | Breeding |
13 | Body Weight |
13 | Belgium |
13 | Arizona |
13 | Antineoplastic Agents, Phytogenic |
13 | Animal Migration |
13 | Adipose Tissue |
12 | Turkey |
12 | Suicide |
12 | Substance Abuse Treatment Centers |
12 | Structure-Activity Relationship |
12 | Spores, Fungal |
12 | Spectrometry, Fluorescence |
12 | Specimen Handling |
12 | Soil Pollutants, Radioactive |
12 | Skin |
12 | Self-Help Groups |
12 | Self Care |
12 | Referral and Consultation |
12 | Quantitative Trait Loci |
12 | Psychiatric Status Rating Scales |
12 | Picea |
12 | Petroleum |
12 | Patient-Centered Care |
12 | Organic Chemicals |
12 | NF-kappa B |
12 | Lipid Peroxidation |
12 | Infant |
12 | Indicators and Reagents |
12 | Hospice Care |
12 | Honey |
12 | High-Throughput Nucleotide Sequencing |
12 | Fentanyl |
12 | Feathers |
12 | Fatty Acids |
12 | Dogs |
12 | Cyclooxygenase 2 |
12 | Chromosomes, Plant |
12 | Bayes Theorem |
12 | Asthma |
12 | Ambulatory Care |
12 | Alnus |
12 | Aldehydes |
12 | Acer |
11 | Water Supply |
11 | Ultraviolet Rays |
11 | Tomography, X-Ray Computed |
11 | Synaptosomes |
11 | Swine |
11 | Stilbenes |
11 | Solubility |
11 | Solid Phase Extraction |
11 | Sequence Homology, Amino Acid |
11 | Self Report |
11 | Residential Treatment |
11 | Predictive Value of Tests |
11 | Polychlorinated Biphenyls |
11 | Plants, Genetically Modified |
11 | Periodicity |
11 | Peptides |
11 | Odorants |
11 | Nitrogen Isotopes |
11 | Neurons |
11 | Naltrexone |
11 | Isoenzymes |
11 | Irritable Bowel Syndrome |
11 | Interviews as Topic |
11 | Interpersonal Relations |
11 | Inflammation |
11 | History, 21st Century |
11 | Health Knowledge, Attitudes, Practice |
11 | Haplotypes |
11 | Genetic Linkage |
11 | Genes, Bacterial |
11 | Fluorescence |
11 | Floods |
11 | Feasibility Studies |
11 | Face |
11 | Escherichia coli |
11 | Designer Drugs |
11 | Depressive Disorder |
11 | Cloning, Molecular |
11 | Cell Wall |
11 | Case-Control Studies |
11 | Bird Diseases |
11 | Biological Products |
11 | Bacterial Proteins |
11 | Attitude of Health Personnel |
11 | Anxiety |
11 | Animal Feed |
11 | Animal Distribution |
11 | African Americans |
10 | gamma-Aminobutyric Acid |
10 | Wind |
10 | Svalbard |
10 | Survival Analysis |
10 | Steam |
10 | Spain |
10 | Solutions |
10 | Software |
10 | Sodium |
10 | Sodium Chloride |
10 | Siberia |
10 | Sexual Behavior, Animal |