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DDT    音标拼音: [d,id,it'i]

点点通,[地球村互联网络词典的简称,是阅读英文电子资料必备的辅助工具]

点点通,[地球村互联网络词典的简称,是阅读英文电子资料必备的辅助工具]

DDT
n 1: an insecticide that is also toxic to animals and humans;
banned in the United States since 1972 [synonym:
{dichlorodiphenyltrichloroethane}, {DDT}]

25 Moby Thesaurus words for "DDT":
DDD, Paris green, antimony, arsenic, arsenic trioxide, beryllium,
bichloride of mercury, cadmium, carbolic acid, carbon monoxide,
carbon tetrachloride, chlorine, cyanide, hydrocyanic acid,
hyoscyamine, lead, mercuric chloride, mercury, mustard gas,
nicotine, phenol, poison gas, prussic acid, selenium, strychnine

1. Generic term for a program that assists in debugging other
programs by showing individual {machine instructions} in a
readable symbolic form and letting the user change them. In
this sense the term DDT is now archaic, having been widely
displaced by "debugger" or names of individual programs like
"{adb}", "{sdb}", "{dbx}", or "{gdb}".

2. Under {MIT}'s fabled {ITS} {operating system}, DDT (running
under the alias HACTRN) was also used as the {shell} or top
level command language used to execute other programs.

3. Any one of several specific debuggers supported on early
{DEC} hardware. The {DEC} {PDP-10} Reference Handbook (1969)
contained a footnote on the first page of the documentation
for DDT that illuminates the origin of the term:

Historical footnote: DDT was developed at {MIT} for the
{PDP-1} computer in 1961. At that time DDT stood for "DEC
Debugging Tape". Since then, the idea of an on-line debugging
program has propagated throughout the computer industry. DDT
programs are now available for all DEC computers. Since media
other than tape are now frequently used, the more descriptive
name "Dynamic Debugging Technique" has been adopted, retaining
the DDT abbreviation. Confusion between DDT-10 and another
well known pesticide, dichloro-diphenyl-trichloroethane
(C14-H9-Cl5) should be minimal since each attacks a different,
and apparently mutually exclusive, class of bugs.

(The "tape" referred to was, incidentally, not magnetic but
paper.) Sadly, this quotation was removed from later editions
of the handbook after the {suits} took over and DEC became
much more "businesslike".

The history above is known to many old-time hackers. But
there's more: Peter Samson, compiler of the original {TMRC}
lexicon, reports that he named "DDT" after a similar tool on
the {TX-0} computer, the direct ancestor of the PDP-1 built at
{MIT}'s Lincoln Lab in 1957. The debugger on that
ground-breaking machine (the first transistorised computer)
rejoiced in the name FLIT (FLexowriter Interrogation Tape).

[{Jargon File}]

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  • DDT - Wikipedia
    Commercial DDT is a mixture of several closely related compounds Due to the nature of the chemical reaction used to synthesize DDT, several combinations of ortho and para arene substitution patterns are formed The major component (77%) is the desired p, p' isomer The o, p' isomeric impurity is also present in significant amounts (15%)
  • DDT - A Brief History and Status | US EPA
    DDT was the first of the modern synthetic insecticides, developed in the 1940s It helped control diseases such as typhus and malaria Enviromental concerns led to its cancellation in the 1970s It still has limited indoor use in Africa to prevent malaria
  • What Is DDT? Uses, Effects, and Why It Was Banned
    DDT, short for dichloro-diphenyl-trichloroethane, is a synthetic insecticide that became one of the most widely used and controversial chemicals of the 20th century First recognized as a powerful insect killer in 1942, it was banned in the United States by 1972 after scientists linked it to cancer risk, wildlife destruction, and lasting environmental contamination It remains one of the most
  • DDT | Description, History, Effects, Uses, Banned, Facts | Britannica
    DDT, a synthetic insecticide that belongs to the family of organic halogen compounds and is highly toxic toward a variety of insects as a contact poison that apparently exerts its effects by disorganizing the nervous system Learn more about DDT in this article
  • What Is DDT? Its History, Effects, and Ban - Biology Insights
    Explore the history of DDT, its use as a miracle insecticide, the science of its environmental persistence, and its eventual global ban
  • DDT (dichlorodiphenyltrichloroethane) - Washington State Department of . . .
    What is DDT? DDT (dichlorodiphenyltrichloroethane) is a pesticide once widely used to control insects in agriculture and insects that carry diseases DDT is a white
  • DDT, DDE, DDD | Toxic Substances | Toxic Substance Portal | ATSDR
    DDT (dichlorodiphenyltrichloroethane) is a pesticide once widely used to control insects in agriculture and insects that carry diseases such as malaria DDT is a white, crystalline solid with no odor or taste Its use in the U S was banned in 1972 because of damage to wildlife, but is still used in some countries
  • Toxic Traditions: DDT and How History Repeats Itself with Chemical . . .
    DDT, short for dichlorodiphenyltrichloroethane, was once widely used as a pesticide in the United States and beyond But DDT didn’t just harm wildlife—it harmed
  • Is DDT Still Being Used? - WorldAtlas
    Yet DDT residues remain detectable in soils, sediments, wildlife, and even human tissues, a reminder of how long the chemical lingers after its use ends So, Is DDT Still Being Used? People fogging DDT spray kill mosquito for control Malaria, Encephalitis, Dengue and Zika in village at Bangkok Thailand
  • Dichloro-diphenyl-trichloroethane (DDT) - EBSCO
    DDT can be detected in the tissues of almost every person on earth, especially Indigenous peoples living in the Arctic and workers from insecticide production plants and agriculture DDT is present in human breast milk, and it can pass through the placenta from mother to fetus to impair brain development and increase the risk of birth defects





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