1. The house is regularly spraying with DDT.

2. DDT is a pesticide that was first synthesized in 1874.

3. Well-known toxic pesticides include Aldrin, Chlordane, and DDT.

4. In 1873, the chemical DDT was first synthesized.

5. The insects can be exterminated by spraying DDT.

6. Next in line were DDT and chlordane.

7. These insects have become resistant to DDT.

8. The underneath cargo is'stained contaminated the DDT dust.

9. Many insects have became resistant to DDT.

10. The government vetoed the use of DDT.

11. They're spraying DDT. to kill the insects.

12. Methoxychlor is a DDT substitute and one of endocrine-disrupting chemicals which heavily pollutes the environment.

13. The transfer from qualitative research to quantitative analysis showd the inevitable tendency of research on the residual age index of dichlorodiphenyltrichloroethane(DDT) in soils.

14. We measured serum DDT and its metabolites at the Harvard University Organic Chemistry Laboratory.

15. However, the accumulative concentrations of DDT and BHC in 1998 was much higher than that of some foreign countries.

16. DDT tube, photoelectric cell, strain gauge and witness board are used to study the transition characteristics of the deflagration to detonation of NEPE propellant slurry in the mixing process.

17. The residue of DDT in soil is rather high due to the application of the pesticide Kelthane to prevent and kill red spider on the wheat field and the pesticide Kelthane contains DDT.

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18. Led to the ban of DDT because of its highly toxic nature.

19. DDT molecules in water tend to migrate to the surface.

20. The residual, repellency and irritant actions of DDT keeps out even resistance mosquitoes.

21. Encouraged the use of DDT indoors, but discouraged it for outdoor use.

22. This paper deals with the effect of DDT and BHC on amino acids content in Chlorella vulgaris Beij so as to provide theoretical basis for environmental bio-engineering and biological monitoring.

23. Academic and business critics of Rachel Carson, for example, argued that eliminating DDT removed the most effective pesticide in the fight against mosquitoes that spread malaria.

24. Preliminary study on the measure of fines concentration in the filtrate of Dynamic Drainage Test DDT.

25. The acoustoelectric current also reveals Coulomb Blockade as a function of split gate voltage when microwave signal with the resonance frequency is coupled to DDT.

26. Microbiological degradation is an effective and environment - friendly method to eliminate DDT pollution.

27. Microwave extraction technique is a rapid, accurate and effective method to determine trace hexachlorocyclohexane and DDT in soil.

28. Chlorinated hydrocarbon A hydrocarbon in which one or more hydrogen atoms are replaced by chlorine atoms. Some chlorinated hydrocarbons are used as insecticides, e. g. aldrin, dieldrin, and DDT .

29. Role in the nervous system of pests, such as DDT, parathion , carbofuran, esters, such as pyrethrum.

30. The contents of organochlorine were descending apparently since the DDT and BHC pesticides were forbidden by Chinese government in 1983.

31. The pathway of DDT degradation in soil has not been fully ascertained.

32. Many microorganisms possess the ability to dehydrohalogenate DDT to DDE.

33. Conclusion The DDT and BHC contents had declined since the DDT and BHC were prohibited in 1983.

34. The quantitative token of the residual age index of DDT in soils was primarily discussed, and the normalized residual time index(NRTI) of DDT was designed as one of the methods.

35. The researchers sprayed DDT inside the huts and released Aedes aegypti mosquitoes — the species that carries Chikungunya, dengue and yellow fever — ten metres away from the huts.

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36. Organochrorinated pesticides residues(666, DDT) maintained downtrend and organophosphorus pesticides residues met the national associated criteria except methyl parathion in cereals.

37. Cross - resistances of DDT resistant larvae of Culex pipiens pallens to 14 kinds of organochlorines.

38. It is concluded that Boletus edulis and Gomphidius viscidus reacted to DDT stress through different mechanisms and both had the potential capabilities of degrading DDT.

39. Objective To study the combined estrogenic effects of the isomers and the homologue of DDT pesticide.

40. The use of DDT caused the peregrine falcon to become extinct throughout much of its normal range throughout the Eastern United States.

41. Thousands of new chemicals , like DDT, soon resided in every living tissue.

42. Then came the golden days of DDT ( dichlorodiphenyltrichloroethane ).

43. The extent of pollution by BHC and DDT in agricultural environment gradually decreases toward the northern and southern parts of China.

44. Take DDT(), a pesticide that can damage the nerous system.

45. This system was used to measure the flame propagation velocities along the tube, and furthermore to determine the DDT distance.

46. The chemicals seeping out as temperatures rise include the pesticides DDT, lindane and chlordane as well as the industrial chemicals PCBs and the fungicide hexachlorobenzene (HCB).

47. Technique of microwave extraction and GC - ECD was used to analyze hexachlorocyclohexane BHC and DDT in soil.

48. Some chlorinated hydrocarbons are used as insecticides, e. g. aldrin, dieldrin, and DDT.

49. Among them are DDT, aldrin, dieldrin, heptachlor, chlordane, lindane, endrin, mirex, hexachloride, and toxaphene .

50. The Chinese squid was used to monitor the contamination by BHC and DDT as a bio-indicator for the first time in offshore waters.

51. DDT for malaria control, especially in rural areas is cheap, has long residual, repellency, irritant actions and is safe.

52. Fortunately, in 1972, a law was passed to ban DDT, which saved the bald eagle from total wipeout.

53. DDT sprayed into the air kills mosquitoes and other insect pests.

54. The composition of DDT indicates that the residues include the DDT used before forbiddance and their degrading products as well as a small amount of DDT used recently.

55. These insecticides include DDT a compound banned in the United States in 1972.