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Found Pesticide 25 times.

Displaying results 1 to 10.

1. Acceptable daily intake (ADI)
This is an estimate of the amount of a substance in food that can be ingested daily over a lifetime by humans without appreciable health risk. The concept of the ADI has been developed principally by WHO and FAO and is relevant to chemicals such as additives to foods, residues of pesticides and veterinary drugs in foods. ADIs are derived from laboratory toxicity data, and from human experiences of such chemicals when this is available, and incorporate a safety factor. The ADI is thus an estimate of the amount of a substance in food that can be ingested over a lifetime by humans without significant risk to health (for contaminants in food and drinking water, tolerable intakes - daily or weekly - are used). See tolerable daily intake .

2. Agrochemical
Term for any artificially-produced chemical (such as a feed additives, pharmaceutical, fertilizer or pesticide ) used in agriculture to improve crop or livestock production.

3. Bacillus thuringiensis (Bt)
Bacillus thuringiensis is a bacterium that kills insects (mainly in the genera Lepidoptera, Diptera and Coleoptera) and is a major component of the microbial pesticide industry. Researchers are also investigating ways to incorporate the bacterium's insect toxins into the genomes of plants to make insect-resistant crops.

4. Biocide
A chemical that kills organisms. See herbicide and pesticide .

5. Biological control (biocontrol)
The agricultural use of living things, such as parasite s, diseases, and predators, to control or eliminate others, such as weeds and pests, rather than by using chemicals ( herbicide s and pesticide s).

6. Biological half-life (t 1/2)
This is the time required for one-half of the total amount of a particular substance in a biological system to be consumed or broken down by biological processes when the rate of removal is approximately exponential. Toxic chemicals with a long biological half-life (such as some pesticide s) will tend to accumulate in the body and are, therefore, more likely to be harmful. A substance with a short biological half-life may still accumulate if a portion of it it becomes tightly bound to bone or other tissues, even if most of it is quickly cleared from the body.

7. Biological magnification (biomagnification)
The process by which toxins such as pesticide s build up in each successive link in the food chain; for instance, a given population of beetles may have very low levels of a fat-soluble pesticide, but the pesticide will build to much greater levels in the fat of a bird that eats those beetles, and the pesticide will reach greater levels still in a human or panther that eats the beetle-eating birds.

8. Chemosterilant
A chemical for controlling insect populations which prevents them from reproducing without killing them or changing their mating behaviors. Compare pesticide .

9. Cyanogen bromide (CNBr)
An inorganic, toxic substance with the chemical formula CNBr which is white and crystalline with a sharp odor, is an irritant, and can be dissolved in water, alcohol , and ether. It melts at 52 degrees Celsius and boils at 61.4 degrees Celsius. It is used to extract gold, in pesticide s, and in the chemical synthesis of organic substances. It is also used in genetic engineering to cleave polypeptide chains, especially synthetic protein s, wherever the amino acid methionine occurs. It is also used to attach protein ligand s to various supporting substances in preparation for affinity chromatography .

10. Cyclodextrin
A cyclic oligomer of alpha-D-glucopyranose. The most common cyclodextrins are alpha, beta and gamma cyclodextrin having 6,7 and 8 glucopyranose units respectively. They occur naturally in starch digests of the bacteria Bacillus Macerans. With a hydrophobic interior cavity, they can complex small hydrophobic molecules while remaining soluble in water. Potential applications include water-soluble pharmaceuticals and herbicides and pesticide s.


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