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Introduction | |
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Motivation | |
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Pesticides and opinion | |
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The fly in the soup | |
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Low-tech food production | |
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Conclusion | |
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A great market | |
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The number of chemicals used as pesticides | |
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Amounts of pesticides produced | |
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Marketing | |
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Dirty dozens | |
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Nomenclature, definitions, and terminology | |
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Toxicology, ecotoxicology, and environmental toxicology | |
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Pesticides, biocides, common names, chemical names, and trade names | |
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Chemical structures are versatile | |
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Helpful reading | |
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Biochemistry and cell biology | |
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General toxicology | |
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Insect biochemistry, plant physiology, and neurophysiology | |
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Pesticides | |
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Side effects of pesticides | |
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Why is a toxicant poisonous? | |
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Seven routes to death | |
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Enzyme inhibitors | |
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Disturbance of the chemical signal systems | |
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Toxicants that generate very reactive molecules that destroy cellular components | |
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Weak organic bases or acids that degrade the pH gradients across membranes | |
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Toxicants that dissolve in lipophilic membranes and disturb their physical structure | |
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Toxicants that disturb the electrolytic or osmotic balance or the pH | |
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Strong electrophiles, alkalis, acids, oxidants, or reductants that destroy tissue, DNA, or proteins | |
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How to measure toxicity | |
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Endpoints | |
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Endpoints in ecotoxicology and pest control | |
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Endpoints in human toxicology | |
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Dose and effect | |
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Dose and response | |
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Dose-response curves for the stable fly | |
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Scatter in dose-response data | |
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LD50 and related parameters | |
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Acute and chronic toxicity | |
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Interactions | |
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Definitions | |
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Isoboles | |
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Mechanisms of interactions | |
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Examples | |
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Piperonyl butoxide | |
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Deltamethrin and fenitrothion | |
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Atrazine and organophosphate insecticides | |
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Pesticides interfering with processes important to all organisms | |
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Pesticides that disturb energy production | |
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Anabolic and catabolic processes | |
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Synthesis of acetyl coenzyme A and the toxic mechanism of arsenic | |
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The citric acid cycle and its inhibitors | |
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Fluoroacetate | |
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Inhibitors of succinic dehydrogenase | |
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The electron transport chain and production of ATP | |
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Rotenone | |
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Inhibitors of electron transfer from cytochrome b to c[subscript 1] | |
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Inhibitors of cytochrome oxidase | |
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Uncouplers | |
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Inhibition of ATP production | |
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Organotin compounds | |
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Diafenthiuron | |
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Summary | |
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Herbicides that inhibit photosynthesis | |
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Weak organic acids | |
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Free radical generators | |
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D[subscript 1] blockers | |
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Urea derivatives | |
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Triazines | |
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Inhibitors of carotene synthesis | |
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Amitrole | |
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Aclonifen | |
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Beflubutamid | |
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Protoporphyrinogen oxidase inhibitors | |
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General SH reagents and free radical generators | |
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Mercury | |
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Other multisite fungicides | |
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Perhalogenmercaptans | |
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Alkylenebis(dithiocarbamate)s and dimethyldithiocarbamates | |
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Fungicides with copper | |
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Pesticides interfering with cell division | |
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Fungicides | |
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Benomyl | |
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Thiofanate-methyl | |
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Carbendazim | |
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Thiabendazole | |
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Diethofencarb | |
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Herbicides | |
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Trifluralin | |
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Carbetamide | |
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Pesticides inhibiting enzymes in nucleic acid synthesis | |
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Sporulation-inhibiting fungicides | |
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Inhibition of incorporation of uridine into RNA | |
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Bacillus thuringiensis and its toxins | |
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The mechanism of action of [delta]-endotoxins | |
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Biotechnology | |
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Engineered plants | |
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Biology | |
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Commercial products | |
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Specific enzyme inhibitors | |
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Inhibitors of ergosterol synthesis | |
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Inhibition of HMG-CoA reductase | |
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Inhibition of squalene expoxidase | |
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DMI fungicides | |
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Examples of DMI fungicides from each group | |
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Azoles and triazoles | |
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Pyridines and pyrimidines | |
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Piperazines | |
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Amines | |
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Morpholines | |
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Conclusions | |
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Herbicides that inhibit synthesis of amino acids | |
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The mode of action of glyphosate | |
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Degradation of glyphosate | |
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Selectivity | |
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Mode of action of glufosinate | |
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Inhibitors of acetolactate synthase | |
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Inhibitors of chitin synthesis | |
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Insecticides | |
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Fungicides | |
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Inhibitors of cholinesterase | |
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Acetylcholinesterase | |
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Organophosphates | |
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Naturally occurring organophosphorus insecticides | |
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Carbamates | |
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Molecular structure and potency of inhibition | |
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Development of organophosphorus and carbamate insecticides | |
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Parathion and similar compounds | |
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Aliphatic organophosphates | |
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Examples of carbamates | |
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Other enzymes inhibited by organophosphates and carbamates | |
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The butyrylcholinesterases | |
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The neurotoxic target enzyme (NTE) | |
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Carboxylesterases | |
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Interference with signal transduction in the nerves | |
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Potency of nerve poisons | |
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Selectivity | |
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The nerve and the nerve cell | |
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Pesticides that act on the axon | |
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Impulse transmission along the axon | |
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Pesticides | |
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Pyrethroids | |
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DDT and its analogues | |
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Pesticides acting on synaptic transmission | |
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Inhibitory synapses | |
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Pesticides | |
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Lindane | |
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Fipronil | |
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Cyclodiene insecticides | |
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Avermectins | |
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The cholinergic synapses | |
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Atropine | |
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Nicotinoids and neonicotinoids | |
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Cartap | |
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Calcium channels as possible targets for insecticides | |
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Summary | |
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Pesticides that act as signal molecules | |
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Insect hormones | |
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Insect endocrinology | |
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Juvenile hormone | |
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American paper towels | |
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Juvenile hormone agonists as pesticides | |
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Antagonists | |
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Ecdysone | |
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Phyto-ecdysones | |
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Synthetic ecdysteroids used as insecticides | |
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Azadirachtin | |
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Behavior-modifying pesticides | |
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Definitions | |
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Pheromones | |
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Structure-activity relationships | |
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Alarm and trail pheromones | |
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Aggregation pheromones | |
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Pheromones used as pesticides and lures | |
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Coleoptera | |
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Lepidoptera | |
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Fruit flies | |
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Aphid food deterrent | |
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Mosquito repellents | |
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Plant hormones | |
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Translocation and degradation of pesticides | |
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The compartment model | |
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The bioconcentration factor | |
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The half-life | |
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The area under the curve | |
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Example | |
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Disappearance of dieldrin in sheep | |
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Dieldrin uptake in sheep | |
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Degradation of pesticides by microorganisms | |
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Degradation by adaption | |
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Degradation by co-metabolism | |
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Kinetics of degradation | |
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Importance of chemical structure for degradation | |
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Examples | |
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Co-metabolism and adaptation | |
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Parathion and other pesticides with nitro groups | |
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Ester hydrolysis of carbaryl | |
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Mineralization of dalapon | |
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The degraders | |
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Soil adsorption | |
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Why are chemicals adsorbed? | |
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Examples | |
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Measurements of adsorption | |
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Desorption | |
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Evaporation | |
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Example | |
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Biotransformation in animals | |
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Oxidation | |
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Epoxide hydrolase | |
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Glutathione transferase | |
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Hydrolases | |
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Glucoronosyltransferase and sulfotransferase | |
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Stereospecific biotransformation | |
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Designing pesticides that have low mammalian toxicity | |
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Acephate | |
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Malathion and dimethoate | |
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Nereistoxin | |
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Resistance to pesticides | |
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Definitions | |
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Resistance is an inevitable result of evolution | |
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Time for resistance development | |
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Questions about resistance | |
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Are resistant insects more robust than sensitive ones? | |
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Is resistance caused by one allele in one gene locus? | |
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Do pesticides cause resistance? | |
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Biochemical mechanisms | |
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Increased detoxication | |
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DDT dehydrochlorinase | |
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Hydrolases | |
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CYP enzymes in insects | |
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CYP enzymes in plants | |
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Insensitive target enzyme or target receptor site | |
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Acetylcholinesterase | |
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kdr resistance | |
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Resistance in fungi | |
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Benzimidazole | |
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Sterol biosynthesis inhibitors | |
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Atrazine resistance and plants made resistant by genetic engineering | |
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Resistance to glyphosate | |
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Summary | |
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Resistance to older biocides used as pesticides | |
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Resistance to third- and fourth-generation pesticides | |
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How to delay development of resistance | |
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Refuge strategy | |
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Mixing pesticides with different modes of action and different detoxication patterns | |
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Switching life-stage target | |
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Increased sensitivity in resistant pests | |
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Inhibition of detoxication enzymes | |
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Conclusions | |
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Pesticides as environmental hazards | |
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Pesticides are poisons | |
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Pesticides are xenobiotics | |
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Various types of bias | |
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Publication bias | |
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Test bias | |
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Extrapolation bias | |
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Benchmark values | |
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Required toxicological tests for official approval of a pesticide | |
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Analysis of residues in food and the environment | |
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Definitions | |
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Sampling | |
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Sample preparation | |
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Analysis | |
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Chromatographic methods | |
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Biological methods | |
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Pesticide residues in food | |
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Toxicity classification of pesticides | |
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Classification of carcinogenecity | |
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Definitions of ADI and NOEL and tolerance limits | |
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ADI | |
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NOEL | |
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Residue tolerance limits | |
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Comparing health hazards of pesticides with other toxicants present in the market basket | |
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Elixirs of death | |
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Nomenclature and structure of dixoins | |
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Dioxins in pesticides | |
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Vietnam | |
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Presence of dioxins in pesticides in general | |
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Toxicology | |
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The target | |
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Dioxin and metabolism of caffeine | |
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Analysis | |
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Saturday, 12:30, July 10, 1976 | |
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Summary | |
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Angry bird-watchers, youth criminals, and impotent rats | |
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Clear Lake | |
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Peregrine falcons and other birds of prey | |
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Borlaug's warning | |
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DDT and impotence? | |
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Conclusions | |
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Literature | |
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Index | |