| 36 | Humans |
| 26 | Female |
| 26 | Animals |
| 25 | Male |
| 20 | Nickel (toxicity) |
| 20 | Nickel (chemistry) |
| 18 | Metals, Heavy (analysis) |
| 16 | Egypt |
| 13 | Water Pollutants, Chemical (toxicity) |
| 13 | Adult |
| 12 | Hydrogen-Ion Concentration |
| 11 | Metals, Heavy (toxicity) |
| 11 | Environmental Monitoring |
| 10 | Water Pollutants, Chemical (analysis) |
| 10 | Nickel (metabolism) |
| 9 | Rats, Wistar |
| 9 | Nickel (analysis) |
| 9 | Middle Aged |
| 8 | Spectrophotometry, Atomic |
| 8 | Rats |
| 7 | Morocco |
| 7 | Kinetics |
| 7 | Geologic Sediments (chemistry) |
| 7 | Adsorption |
| 7 | Adolescent |
| 6 | Water Pollutants, Chemical (metabolism) |
| 6 | Tunisia |
| 6 | Time Factors |
| 6 | Nickel (isolation & purification) |
| 6 | Nickel (blood) |
| 6 | Metals, Heavy (chemistry) |
| 6 | Egypt (epidemiology) |
| 6 | Copper (chemistry) |
| 6 | Aged |
| 5 | Water Pollutants, Chemical (chemistry) |
| 5 | Waste Disposal, Fluid (methods) |
| 5 | Temperature |
| 5 | Risk Assessment |
| 5 | Nickel |
| 5 | Metals, Heavy (metabolism) |
| 5 | Environmental Monitoring (methods) |
| 5 | Dose-Response Relationship, Drug |
| 5 | Cadmium (analysis) |
| 5 | Biodegradation, Environmental |
| 4 | Water Pollutants, Chemical (isolation & purification) |
| 4 | Thermodynamics |
| 4 | Smoking (epidemiology) |
| 4 | Seawater (chemistry) |
| 4 | Plant Roots (metabolism) |
| 4 | Oxidative Stress (drug effects) |
| 4 | Occupational Exposure (statistics & numerical data) |
| 4 | Nickel (pharmacology) |
| 4 | Mediterranean Sea |
| 4 | Liver (drug effects) |
| 4 | Lead (chemistry) |
| 4 | Kidney (drug effects) |
| 4 | Head and Neck Neoplasms (epidemiology) |
| 4 | Geologic Sediments (analysis) |
| 4 | Environmental Pollutants (toxicity) |
| 4 | Environmental Exposure (analysis) |
| 4 | Electrochemical Techniques |
| 4 | Corrosion |
| 4 | Chronic Disease |
| 4 | Cadmium (chemistry) |
| 3 | Water Purification (methods) |
| 3 | Water Pollution, Chemical (statistics & numerical data) |
| 3 | Water Microbiology |
| 3 | Tunisia (epidemiology) |
| 3 | Titanium (chemistry) |
| 3 | Syndrome |
| 3 | Surveys and Questionnaires |
| 3 | Surface Properties |
| 3 | Soil (chemistry) |
| 3 | Smoking (adverse effects) |
| 3 | Sewage (analysis) |
| 3 | Risk Factors |
| 3 | Recombinant Proteins (metabolism) |
| 3 | Prevalence |
| 3 | Plant Shoots (metabolism) |
| 3 | Pelvic Pain (etiology) |
| 3 | Particle Size |
| 3 | Occupational Exposure (adverse effects) |
| 3 | Nickel (pharmacokinetics) |
| 3 | Mytilus (drug effects) |
| 3 | Microscopy, Electron, Scanning |
| 3 | Metals (analysis) |
| 3 | Materials Testing |
| 3 | Liver (metabolism) |
| 3 | Lipid Peroxidation (drug effects) |
| 3 | Ligands |
| 3 | Iron (chemistry) |
| 3 | Interdisciplinary Communication |
| 3 | Hot Temperature |
| 3 | Food Contamination (analysis) |
| 3 | Ferric Compounds (chemistry) |
| 3 | Environmental Pollutants (blood) |
| 3 | Environmental Exposure (statistics & numerical data) |
| 3 | Environmental Exposure (adverse effects) |
| 3 | Electrodes |
| 3 | Dust (analysis) |
| 3 | Dental Alloys (chemistry) |
| 3 | Cross-Sectional Studies |
| 3 | Copper (toxicity) |
| 3 | Copper (metabolism) |
| 3 | Copper (analysis) |
| 3 | Chromium (toxicity) |
| 3 | Chromium (metabolism) |
| 3 | Chromium (blood) |
| 3 | Chromium (analysis) |
| 3 | Child |
| 3 | Catalysis |
| 3 | Case-Control Studies |
| 3 | Cadmium (toxicity) |
| 3 | Cadmium (metabolism) |
| 3 | Cadmium (isolation & purification) |
| 3 | Analysis of Variance |
| 3 | Algeria |
| 2 | Zinc |
| 2 | Zinc (isolation & purification) |
| 2 | Zinc (chemistry) |
| 2 | Zinc (analysis) |
| 2 | Young Adult |
| 2 | X-Ray Diffraction |
| 2 | United States |
| 2 | Trace Elements (analysis) |
| 2 | Tea (chemistry) |
| 2 | Sulfides (analysis) |
| 2 | Structure-Activity Relationship |
| 2 | Stress, Physiological |
| 2 | Staphylococcus (genetics) |
| 2 | Staphylococcus (enzymology) |
| 2 | Stainless Steel (chemistry) |
| 2 | Spectrophotometry, Ultraviolet |
| 2 | Soil |
| 2 | Soil Pollutants (metabolism) |
| 2 | Soil Pollutants (chemistry) |
| 2 | Soil Pollutants (analysis) |
| 2 | Sodium (chemistry) |
| 2 | Sewage (chemistry) |
| 2 | Severity of Illness Index |
| 2 | Seasons |
| 2 | Salt-Tolerant Plants |
| 2 | Research Design |
| 2 | Recombinant Proteins (genetics) |
| 2 | RNA, Ribosomal, 16S (genetics) |
| 2 | Prostatitis (physiopathology) |
| 2 | Principal Component Analysis |
| 2 | Pregnancy |
| 2 | Polycyclic Aromatic Hydrocarbons (analysis) |
| 2 | Polychlorinated Biphenyls (analysis) |
| 2 | Plasmids |
| 2 | Plant Extracts (pharmacology) |
| 2 | Pichia (genetics) |
| 2 | Photosynthesis (drug effects) |
| 2 | Penicillium (enzymology) |
| 2 | Pelvic Pain (physiopathology) |
| 2 | Oxides (chemistry) |
| 2 | Oxidation-Reduction |
| 2 | Orthodontic Appliances |
| 2 | Oligosaccharides (biosynthesis) |
| 2 | Occupational Exposure (analysis) |
| 2 | Nickel (poisoning) |
| 2 | Nickel (adverse effects) |
| 2 | Nickel (administration & dosage) |
| 2 | Nematoda (drug effects) |
| 2 | National Institute of Diabetes and Digestive and Kidney Diseases (U.S.) |
| 2 | Mytilus (metabolism) |
| 2 | Mustard Plant (metabolism) |
| 2 | Models, Theoretical |
| 2 | Models, Chemical |
| 2 | Microbial Sensitivity Tests |
| 2 | Metals, Heavy (pharmacokinetics) |
| 2 | Metals, Heavy (isolation & purification) |
| 2 | Metallothionein (metabolism) |
| 2 | Mesembryanthemum (metabolism) |
| 2 | Manganese Compounds (chemistry) |
| 2 | Logistic Models |
| 2 | Liver (pathology) |
| 2 | Liver (enzymology) |
| 2 | Liver (chemistry) |
| 2 | Lipase (genetics) |
| 2 | Limit of Detection |
| 2 | Lethal Dose 50 |
| 2 | Lead (metabolism) |
| 2 | Lead (isolation & purification) |
| 2 | Lead (analysis) |
| 2 | Kidney Function Tests |
| 2 | Kidney (pathology) |
| 2 | History, Ancient |
| 2 | Head and Neck Neoplasms (etiology) |
| 2 | Glutathione Transferase (metabolism) |
| 2 | Glucuronates (biosynthesis) |
| 2 | Fungal Proteins (metabolism) |
| 2 | Europe |
| 2 | Environmental Pollution (prevention & control) |
| 2 | Environmental Pollutants (metabolism) |
| 2 | Environmental Pollutants (analysis) |
| 2 | Endo-1,4-beta Xylanases (metabolism) |
| 2 | Ecosystem |
| 2 | Drug Implants |
| 2 | Drinking Water (chemistry) |
| 2 | Dermatitis, Contact (etiology) |
| 2 | Dermatitis, Contact (epidemiology) |
| 2 | Cystitis, Interstitial (physiopathology) |
| 2 | Creatinine (urine) |
| 2 | Copepoda (metabolism) |
| 2 | Copepoda (drug effects) |
| 2 | Construction Materials |
| 2 | Chlorophyll (metabolism) |
| 2 | Child, Preschool |
| 2 | Chemical and Drug Induced Liver Injury (prevention & control) |
| 2 | Chemical Fractionation |
| 2 | Catalase (metabolism) |
| 2 | Calcium Channels (physiology) |
| 2 | Calcium (metabolism) |
| 2 | Bone and Bones (metabolism) |
| 2 | Biomedical Research (organization & administration) |
| 2 | Biomass |
| 2 | Biodiversity |
| 2 | Biocompatible Materials (therapeutic use) |
| 2 | Biocompatible Materials (administration & dosage) |
| 2 | Aspartate Aminotransferases (blood) |
| 2 | Arsenic (metabolism) |
| 2 | Arsenic (analysis) |
| 2 | Antidotes (therapeutic use) |
| 2 | Antidotes (administration & dosage) |
| 2 | Anti-Bacterial Agents (pharmacology) |
| 2 | Alanine Transaminase (blood) |
| 2 | Air Pollutants (analysis) |
| 1 | omega-Conotoxin GVIA |
| 1 | Zinc (metabolism) |
| 1 | Zinc (blood) |
| 1 | Zinc (adverse effects) |
| 1 | Zea mays |
| 1 | Xylem |
| 1 | Xylans (metabolism) |
| 1 | World Health Organization |
| 1 | Wind |
| 1 | Wetlands |
| 1 | Water Supply (standards) |
| 1 | Water Supply (analysis) |
| 1 | Water Pollutants, Chemical |
| 1 | Water Pollutants, Chemical (pharmacology) |
| 1 | Water Pollutants, Chemical (pharmacokinetics) |
| 1 | Water Pollutants (toxicity) |
| 1 | Water Pollutants (analysis) |
| 1 | Water Movements |
| 1 | Waste Water (microbiology) |
| 1 | Waste Water (analysis) |
| 1 | Viral Proteins (immunology) |
| 1 | Verticillium (pathogenicity) |
| 1 | Vegetables (chemistry) |
| 1 | Urinary Bladder Neoplasms (pathology) |
| 1 | Urinary Bladder Neoplasms (chemistry) |
| 1 | Urinary Bladder (pathology) |
| 1 | Urinary Bladder (chemistry) |
| 1 | Urea (blood) |
| 1 | Ulva (chemistry) |
| 1 | Ultrafiltration (methods) |
| 1 | Turkey |
| 1 | Trisaccharides (biosynthesis) |
| 1 | Triolein (metabolism) |
| 1 | Triglycerides (metabolism) |
| 1 | Triglycerides (blood) |
| 1 | Treatment Outcome |
| 1 | Transformation, Bacterial |
| 1 | Transfection |
| 1 | Transcriptome (drug effects) |
| 1 | Transcription, Genetic (physiology) |
| 1 | Transcription, Genetic (drug effects) |
| 1 | Traction |
| 1 | Trace Elements (toxicity) |
| 1 | Trace Elements (blood) |
| 1 | Toxicokinetics |
| 1 | Toxicity Tests, Acute |
| 1 | Tobacco Smoke Pollution (statistics & numerical data) |
| 1 | Tobacco Smoke Pollution (analysis) |
| 1 | Titanium |
| 1 | Tissue Distribution |
| 1 | Tissue Distribution (drug effects) |
| 1 | Tin (analysis) |
| 1 | Tin (adverse effects) |
| 1 | Thlaspi (metabolism) |
| 1 | Thiobarbituric Acid Reactive Substances (metabolism) |
| 1 | Thiadiazoles (pharmacology) |
| 1 | Thiadiazoles (chemistry) |
| 1 | Thapsigargin (pharmacology) |
| 1 | Technology, Dental (instrumentation) |
| 1 | Technology, Dental (history) |
| 1 | Tea (adverse effects) |
| 1 | TRPC Cation Channels (physiology) |
| 1 | TRPC Cation Channels (immunology) |
| 1 | Symptom Assessment |
| 1 | Superoxide Dismutase (metabolism) |
| 1 | Substrate Specificity (genetics) |
| 1 | Substrate Specificity (drug effects) |
| 1 | Subcutaneous Tissue |
| 1 | Stress, Physiological (drug effects) |
| 1 | Stress, Mechanical |
| 1 | Streptococcus mutans (isolation & purification) |
| 1 | Streptococcus mutans (chemistry) |
| 1 | Streptococcaceae (growth & development) |
| 1 | Staphylococcus (drug effects) |
| 1 | Spectroscopy, Fourier Transform Infrared |
| 1 | Spectrophotometry, Atomic (methods) |
| 1 | Species Specificity |
| 1 | Sorption Detoxification |
| 1 | Solutions |
| 1 | Soil Pollutants |
| 1 | Soil Pollutants (isolation & purification) |
| 1 | Soil Microbiology |
| 1 | Sodium Chloride, Dietary (analysis) |
| 1 | Sodium Chloride (pharmacology) |
| 1 | Smoking |
| 1 | Smoking (blood) |
| 1 | Silicon Dioxide (chemistry) |
| 1 | Sexual Maturation (physiology) |
| 1 | Sex Characteristics |
| 1 | Sewage (microbiology) |
| 1 | Seroepidemiologic Studies |
| 1 | Self Disclosure |
| 1 | Selenium (pharmacology) |
| 1 | Selenium (isolation & purification) |
| 1 | Selenium (blood) |
| 1 | Seawater (analysis) |
| 1 | Seafood |
| 1 | Scorpions (genetics) |
| 1 | Schistosomiasis (immunology) |
| 1 | Schistosomiasis (epidemiology) |
| 1 | Schistosomiasis (complications) |
| 1 | Schistosomiasis (blood) |
| 1 | Salt-Tolerant Plants (metabolism) |
| 1 | Saliva, Artificial |
| 1 | Saliva, Artificial (chemistry) |
| 1 | Saliva (chemistry) |
| 1 | SEC Translocation Channels |
| 1 | Rural Health (statistics & numerical data) |
| 1 | Rivers |
| 1 | Rivers (chemistry) |
| 1 | Ribosomes (drug effects) |
| 1 | Retrospective Studies |
| 1 | Respiration, Artificial (history) |
| 1 | Reproductive Techniques, Assisted (utilization) |
| 1 | Reproductive Techniques, Assisted (trends) |
| 1 | Reproducibility of Results |
| 1 | Renal Insufficiency (prevention & control) |
| 1 | Renal Insufficiency (etiology) |
| 1 | Registries |
| 1 | Refuse Disposal |
| 1 | Reference Values |
| 1 | Reference Standards |
| 1 | Recombinant Proteins (isolation & purification) |
| 1 | Recombinant Fusion Proteins (isolation & purification) |
| 1 | Recombinant Fusion Proteins (genetics) |
| 1 | Recombinant Fusion Proteins (chemistry) |
| 1 | Recombinant Fusion Proteins (biosynthesis) |
| 1 | Receptors, Cytoplasmic and Nuclear (physiology) |
| 1 | Reactive Oxygen Species (metabolism) |
| 1 | Rats, Sprague-Dawley |
| 1 | Rabies virus (immunology) |
| 1 | Rabies Vaccines (immunology) |
| 1 | Rabies (immunology) |
| 1 | Rabies (genetics) |
| 1 | RNA (isolation & purification) |
| 1 | RNA (genetics) |
| 1 | Pyridines (pharmacology) |
| 1 | Pyridines (chemistry) |
| 1 | Pyramidal Cells (physiology) |
| 1 | Pyramidal Cells (drug effects) |
| 1 | Psychometrics |
| 1 | Psychology, Adolescent |
| 1 | Pseudomonas aeruginosa (isolation & purification) |
| 1 | Pseudomonas aeruginosa (growth & development) |
| 1 | Pseudomonas aeruginosa (genetics) |
| 1 | Pseudomonas aeruginosa (drug effects) |
| 1 | Proteolysis (drug effects) |
| 1 | Proteins (metabolism) |
| 1 | Protein-Tyrosine Kinases (metabolism) |
| 1 | Protein Folding (drug effects) |
| 1 | Prospective Studies |
| 1 | Progesterone (blood) |
| 1 | Pregnancy, Animal (drug effects) |
| 1 | Pregnancy, Animal (blood) |
| 1 | Pregnancy Rate |
| 1 | Powders |
| 1 | Potassium (metabolism) |
| 1 | Population Density |
| 1 | Polymers |
| 1 | Poisoning (therapy) |
| 1 | Poisoning (physiopathology) |
| 1 | Poisoning (metabolism) |
| 1 | Point Mutation |
| 1 | Plasmids (genetics) |
| 1 | Plants, Genetically Modified (metabolism) |
| 1 | Plant Transpiration |
| 1 | Plant Stems (metabolism) |
| 1 | Plant Proteins (metabolism) |
| 1 | Plant Leaves (metabolism) |
| 1 | Plant Leaves (drug effects) |
| 1 | Plant Leaves (chemistry) |
| 1 | Plant Extracts (isolation & purification) |
| 1 | Plant Diseases |
| 1 | Picrates (chemistry) |
| 1 | Pichia (metabolism) |
| 1 | Pichia (enzymology) |
| 1 | Phylogeny |
| 1 | Photosynthesis |
| 1 | Photoelectron Spectroscopy |
| 1 | Phosphates (therapeutic use) |
| 1 | Phosphates (administration & dosage) |
| 1 | Phenotype |
| 1 | Peptides (pharmacology) |
| 1 | Peptide Library |
| 1 | Penicillium (genetics) |
| 1 | Pelvic Pain (psychology) |
| 1 | Pelvic Pain (epidemiology) |
| 1 | Pelvic Pain (diagnosis) |
| 1 | Patch Tests |
| 1 | Oxygen Consumption (physiology) |
| 1 | Oxygen (analysis) |
| 1 | Oxidative Stress |
| 1 | Oxidative Stress (physiology) |
| 1 | Oxidants (toxicity) |
| 1 | Oxidants (metabolism) |
| 1 | Oxidants (antagonists & inhibitors) |
| 1 | Ovulation |
| 1 | Ovary (metabolism) |
| 1 | Ovary (drug effects) |
| 1 | Orthodontics |
| 1 | Orthodontic Wires |
| 1 | Orthodontic Wires (microbiology) |
| 1 | Orthodontic Appliances (adverse effects) |
| 1 | Organometallic Compounds (toxicity) |
| 1 | Organometallic Compounds (pharmacology) |
| 1 | Organometallic Compounds (chemistry) |
| 1 | Organ Size (drug effects) |
| 1 | Opuntia (chemistry) |
| 1 | Oligosaccharides (chemistry) |
| 1 | Oil and Gas Fields |
| 1 | Odds Ratio |
| 1 | Occupational Exposure |
| 1 | Occupational Diseases (etiology) |
| 1 | Occupational Diseases (epidemiology) |
| 1 | Nutritional Status |
| 1 | North Sea |
| 1 | Nocardia (metabolism) |
| 1 | Nocardia (isolation & purification) |
| 1 | Nocardia (genetics) |
| 1 | Nocardia (classification) |
| 1 | Nitrogen (analysis) |
| 1 | Nifedipine (pharmacology) |
| 1 | Nickel (antagonists & inhibitors) |
| 1 | Neutralization Tests |
| 1 | Nematoda (classification) |
| 1 | Nasopharyngeal Neoplasms (epidemiology) |
| 1 | Nasopharyngeal Neoplasms (chemically induced) |
| 1 | Nasal Polyps (metabolism) |
| 1 | Nasal Polyps (chemically induced) |
| 1 | Nasal Mucosa (metabolism) |
| 1 | Nanoparticles (toxicity) |
| 1 | Nanoparticles (chemistry) |
| 1 | NADPH-Ferrihemoprotein Reductase (metabolism) |
| 1 | Mytilus |
| 1 | Mytilus (physiology) |
| 1 | Mytilus (enzymology) |
| 1 | Mytilus (chemistry) |
| 1 | Mutation (genetics) |
| 1 | Mutant Proteins (isolation & purification) |
| 1 | Mutagenesis, Site-Directed |
| 1 | Muscle, Skeletal (chemistry) |
| 1 | Mummies (history) |
| 1 | Multivariate Analysis |
| 1 | Mouth (physiology) |
| 1 | Motor Activity (drug effects) |
| 1 | Molecular Structure |
| 1 | Mitosporic Fungi |
| 1 | Mining (statistics & numerical data) |
| 1 | Microscopy, Electron, Transmission |
| 1 | Microelectrodes |
| 1 | Mice |
| 1 | Mice, Inbred Strains |
| 1 | Metals, Heavy (pharmacology) |
| 1 | Metals, Heavy (blood) |
| 1 | Metals, Heavy (adverse effects) |
| 1 | Metals (toxicity) |
| 1 | Metals (metabolism) |
| 1 | Metals (chemistry) |
| 1 | Metal Nanoparticles (chemistry) |
| 1 | Mercury (chemistry) |
| 1 | Menstruation |
| 1 | Menstrual Cycle |
| 1 | Membrane Proteins |
| 1 | Membrane Proteins (metabolism) |
| 1 | Medical Waste |
| 1 | Medical Waste Disposal (methods) |
| 1 | Maternal Exposure (adverse effects) |
| 1 | Manufactured Materials (adverse effects) |
| 1 | Manganese |
| 1 | Manganese (metabolism) |
| 1 | Manganese (chemistry) |
