What is full form of DDT?
546598
A moderately toxic chlorinated hydrocarbon pesticide( Dichlorodiphenyltrichloroethane), formely widely used but now banned in US except for a few specialized purpose because of the ecological damage it cause
233816
None.  The sell chemicals with alkyl groups.  In CH3Cl, CH3 is the alkyl.  They don't exist on their own.  Start with\n\nhttp://www.sigmaaldrich.com/Local/SA_Splash.html
699952
go to www.toxic.net  or pimpmyspace.com
78163
If you want information go to \n\nhttp://www.epa.gov/ebtpages/pollchemicalspolychlorinatedbiphenylspcbs.html\n\nAs stated, you should not handle samples of PCBs.
480929
They are similar in that they are both chlorinated aromatic hydrocarbons.  Think ring carbon structure and then oxidizing it with a powerful oxidizer like chlorine.  Also, hey are both insecticides that are stable or persistent in the environment, hence their bad rep.\n\nDifferences.  Hmmm?  DDT has five chlorines while dieldrin has six.    DDT has two rings (derived from benzene)but they are not fused, while Dieldrin has two fused rings (derived from napthalene).\nI'm sure there is more, such as they mode of reaction, but someone else will have to help.
167512
It can vary greatly.  There are almost no PCB transformers left.  Most now would be a mineral or synthetic oil base.  If interested in PCBs see,\n\nhttp://www.epa.gov/ebtpages/pollchemicalspolychlorinatedbiphenylspcbs.html
58317
DROP is a DDL...\n\n\n\nDELETE is a DML.
401239
Decontamination and sometimes shortened to "Decon"
895811
cockrobin\n\n"WHAT'S THAT UP MY @RSE BATMAN"
353801
The answer is (D) the hawk.\n\nThe concept you are asking about is called biological magnification.  As energy flows through the food chain, there is significantly less energy available to each trophic level.  To accommodate, the organisms must eat a higher biomass from the trophic level below it.  Therefore, each level of the food chain accumulates higher amounts of DDT in their system.  Because the hawk is the third-order consumer in the example provided, it will have the highest concentration of DDT.\n\n<edited for spelling>
160501
Exon Valdese is the most famous I can think of. what about all the chemicals in the water after huricane Katrina?
65891
They just had a special on the T.V. about DDT. How it has been outlawed here in the U.S.. But they want to use it in Africa, to prevent Malaria. But since it is outlawed here, the Africans do not want it. Yet, with the right application amount they could prevent the outbreak of Malaria.
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http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9577937&dopt=Citation\n\nhttp://www.newstarget.com/001061.html\n\nhttp://www.pesticideinfo.org/Detail_Chemical.jsp?Rec_Id=PC35590
284958
OK, a 10% conversion will really give you the monochlorination of dimethylpentane.\n\nBUT, if you go beyond a 10% conversion, you will probably have a double-substituted, tri-substituted or more of dimethylpentane as the product(s).
189245
Insects are sprayed with DDT, then other animals eat them, then yet other animals eat those. DDT absorbs into fatty tissues and can persist without being removed. \n\n Despite claims about thinning eggshells in birds, no scientific study has shown DDT to harm any animal other than insects evan at very high doses.
393256
There are a number of things to consider:\n1) Persistence - the time chemical substance remain in the ecosystem before degrading.  Elements are persistent in the extreme, most do not change during the lifetime of the solar system.  They only change by nuclear processes (fission or fusion).  Some organic substances, such as DDT, persist for decades or centuries simply because there are no efficient mechanisms for their degradation. \n\n2) Bioaccumulation - does the substance accumulate in the the tissues of organisms exposed in the environment due to \na) biocenentration - the tendency of a substance to be found at higher concentration in the organism that in the environment (i.e. higher in fish tissue than in the water they swim in) and \nb) biomagnification - the tendency of a substance to be found at higher concentration in organisms higher up the food chain (higher trophic levels).  There are some substances that bioconcentrate in fish, but do not biomagnify because the things that eat the fish can efficiently metabolize the substance.  \n\n\nand 3) Transportation/exposure - the tendency of substance move from the location it is released in the ecosystem.  More volatile substances are more easily transported around the globe (hence the many problems associated with mercury).  Give a long enough lifetime, most things will be cycled throughout the global ecosphere (to the poles, oceans, all land masses, etc.). \n\nThere are a handful of POPs (persistent organic pollutants-- of which DDT is one of the most infamous, see http://www.pops.int) which persist in the environment for decades or centuries.  The key to minimizing the risk from these substances is to stop their release into the environment so that even the very slow degradation can eliminate them from the ecosystem.\n\nTo sum up, DDT (and other POPs) is very persistent, it bioaccumulates up the food chain (so high-level predators like eagles and polar bears have higher concentrations in their tissues) and is fairly easily transported.
1056508
You should be able to find that information on the epa's mosquito website.  When I tried to access information on Texas, the link was missing but it is http://www.epa.gov/pesticides/health/mosquitoes/resources.htm for future reference.