DDT

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DDT

 [dichlorodiphenyltrichloroethane]
a moderately toxic chlorinated hydrocarbon pesticide, formerly widely used but now banned in the United States except for a few specialized purposes because its extremely long half-life causes ecological damage.

DDT

DDT

(dē′dē-tē′)
n.
A contact insecticide, C14H9Cl5, occurring as colorless crystals or a whitish powder, toxic to humans and animals when swallowed or absorbed through the skin. Most uses have been banned in the United States since 1972.

DDT

A gene on chromosome 22q11.23 that encodes an enzyme belonging to the MIF family which converts D-dopachrome into 5,6-dihydroxyindole.

DDT

Dichloro-diphenyl-trichloroethane Environment A highly hepatotoxic and potentially neurotoxic insecticide that accumulates in fat; DDT is non-biodegradable and concentrates up the food chain. See Pesticide.

DDT

Abbreviation for dichloro-diphenyl- trichloroethane.

DDT

Dichloro-diphenyl-trichloroethane. This highly effective insecticide kills flies, mosquitos, lice, butterflies, moths and beetles. The use of DDT has saved millions of human lives that would otherwise have been lost from MALARIA, YELLOW FEVER, TYPHUS, PLAGUE, river blindness (ONCHOCERCIASIS), DYSENTERY, SLEEPING SICKNESS and FILARIASIS. For ecological reasons it has now been largely replaced by organophosphorous insecticides such as Malathion, Parathion and Paraquat.

DDT

abbrev. (d ichlorod iphenyl-t richloroethane) a chlorinated hydrocarbon which acts as a powerful insecticide with long-lasting effects. DDT was the first major insecticide in use. Although DDT is cheap to manufacture, its use has adverse ecological consequences. Its lack of biodegradability and the fact that it tends to accumulate in fatty tissues has resulted in its transfer from one consumer to another up the FOOD CHAIN becoming concentrated at each step. One effect of this has been to endanger the top carnivorous birds whose eggshells have become paper-thin because DDT has prevented the mobilization of calcium in the oviduct, so reducing the reproductive potential of many rare species. While these processes have been occurring the target insects have been subjected to strong SELECTION pressure from the DDT, with the result that highly resistant populations now exist, making the insecticide useless in many parts of the world.
References in periodicals archive ?
To show the defect of 2-D DCT and the effectiveness of DDCT, we present an example in Fig.
The results show that the DDCT coefficients are more sparse than the 2-D DCT coefficients and also have a different energy distribution.
TABLE 5: Fold changes of TPM1[alpha] and TPM1[kappa] in heart and skeletal muscle (2[conjunction]-(ddCT)).
Data analyses were performed with the ddCT method using [beta]-actin as an internal control.
Data were normalized with [beta]-actin mRNA level (housekeeping gene) and the fold change in gene expression relative to normal was calculated using the ddCt method.
The Verrone plant, which has reached WCM Gold level, currently produces the C635 transmission family (both manual and automatic dual dry clutch DDCT).
The relative gene expression was calculated according to the formula 2-DDCt, where DDCt = DCt experimental setting - DCt control setting (Livak and Schmittgen, 2001).
The gene expression was measured in fold changes by using the DDCt method also called as comparative Ct method (Livak and Schmittgen, 2001).
Contract notice: Design And Organization Of The Passage Of The New Show In 2017 The City Of Paris - 2016 Dicom 01 / Ddct
Contract notice: 2015 ddct 32 - orders to markets for the manufacture and repair of civil registers, deliberations and electoral lists, in 2 separate lots.
Contract notice: 2015 ddct 35 - orders to market cleaning services and occasional services handling of removable elements of the said purpose room "espace reuilly" paris 12eme arrondissement.