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

dichloro-diphenyl-trichloroethane, a powerful insect poison; used in dilution as a powder or in an oily solution as a spray.

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 (dichlorodiphenyltrichloroethane)

a nonbiodegradable water-insoluble chlorinated hydrocarbon once used worldwide as a major insecticide, especially in agriculture. In recent years knowledge of its adverse impact on the environment has led to restrictions in its use. In addition, because tolerance in formerly susceptible organisms develops rapidly, DDT has been largely replaced by organophosphate insecticides in the United States, where DDT was banned by the FDA in 1971. It is still used as a pediculicide where epidemic-scale delousing is justified, as in barracks and refugee camps. Its value as a scabicide is marginal, because scabies and crab lice quickly become resistant to it. See also scabicide.

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.

DDT

dichlorodiphenyltrichloroethane, a powerful insect poison; see chlorinated hydrocarbons.
References in periodicals archive ?
Although there have been some studies of the effects of DDT exposure on respiratory diseases, few have focused on its impact on lung function.
The study found stark gender differences in the mice's response to DDT, as females were at higher risk of obesity, type 2 diabetes, and cholesterol, while in males, DDT exposure did not affect obesity or cholesterol levels and caused only a minor increase in glucose levels.
Although the Stockholm Convention acknowledges the need to treat DDT differently, it does not adequately resolve the problem of DDT use due to the disparate and concomitant interests of countries involved in the dilemma.
Human blood levels of DDT in the American population have dropped since its use was restricted in 1972, but recent reports from the Centers for Disease Control and Prevention (CDC) indicate that there are still low levels of DDT and DDE in our food, house dust, and soil.
The Allinea DDT debugger for the Intel[R] Xeon Phi[TM] coprocessor is already available for download via the Allinea website in the recently released Allinea DDT 3.
today, thanks to the DDT ban and other conservation efforts, some 10,000 pairs of bald eagles inhabit the Lower 48--that's a 20-fold population increase in just four decades
The catalytic dechlorination of DDT was investigated using controlled potential bulk electrolysis.
DDT is still authorised for use in fighting malaria in the meantime--but the convention imposes monitoring controls.
The use of DDT as a pesticide has been very restrictive since 1981 and banned since 1986 in the EU.
Our objectives were to determine the concentration of DDE/ DDT in plasma samples from the spray team 6 months after their last spraying activity in northern Uganda in 2008, and to analyse plasma levels of biochemical markers of disease in blood from the spray team after exposure to DDT, so as to document acute/mid-term toxicity to internal organs, and especially liver function.