What type of bond is ddt

Before the U. DDT is not particularly toxic to humans, compared to other widely used pesticides. Some studies show that if DDT were used responsibly with the regulatory oversight present today, its safety would be comparable to other widely used insecticides. Because of DDT's singular effectiveness in the control of the mosquito, which vectors malaria, it is still used in many countries throughout the world where malaria has proven difficult to control. Use of DDT to control mosquitoes is primarily done inside buildings and through inclusion in household products and selective spraying; this greatly reduces the risk of strong environmental impact.

DDT is an organochlorine. Some organochlorines have been shown to have weak estrogenic activity, that is, they are chemically similar enough to estrogen to trigger hormonal responses in contaminated animals.

This sort of activity has been observed in DDT in laboratory studies involving mouse and rat test subjects, but available epidemiological evidence does not indicate that these effects have occurred in humans as a result of DDT exposure.

Studies of alligators in Florida swamps have found extensive oestrogenation due to high levels of DDT exposure. Many male crocodiles in the area have deformed genitalia and feminised bodily features, while their eggs are showing high rates of infertility and abnormal fetal development. Some researchers believe that this is echoed in the human population. In Rachel Carson's book Silent Spring was published. The book argued that pesticides, and especially DDT, were poisoning both wildlife and the environment and also endangering human health.

The book received little support from the mainstream scientific community. Nonetheless, the public reaction to Silent Spring launched the modern environmental movement, and DDT became a prime target of the growing anti-chemical and anti-pesticide movements during the s.

Despite the U. As of , DDT continues to be used in other primarily tropical countries where mosquito-borne malaria and typhus are greater health problems than DDT's potential toxicity. The s ban in the U. In understanding the public policy landscape that led to the ban, it is important to realize that there were essentially no restrictions in the U. This led to impure products, little knowledge of any risks on the part of the pesticide users, overapplication, and near total disregard for any long-term environmental damage that might occur.

In this light, it is not surprising the DDT was overapplied, and its accumulation in the soil and in sensitive watersheds has been rigorously documented. Cited By. This article has not yet been cited by other publications. Pair your accounts. Your Mendeley pairing has expired. Please reconnect. This website uses cookies to improve your user experience.

The 3D chemical structure image of o,o'-DDT is based on the ball-and-stick model which displays both the three-dimensional position of the atoms and the bonds between them. The radius of the spheres is therefore smaller than the rod lengths in order to provide a clearer view of the atoms and bonds throughout the chemical structure model of o,o'-DDT. For a better understanding of the chemical structure, an interactive 3D visualization of o,o'-DDT is provided here. The o,o'-DDT molecule shown in the visualization screen can be rotated interactively by keep clicking and moving the mouse button.

Mouse wheel zoom is available as well — the size of the o,o'-DDT molecule can be increased or decreased by scrolling the mouse wheel. The information of the atoms, bonds, connectivity and coordinates included in the chemical structure of o,o'-DDT can easily be identified by this visualization.

By right-clicking the visualization screen, various other options are available including the visualization of van der Waals surface and exporting to a image file.