.... efecto mortífero en ellos y por tanto dejaron de ser efectivas. Esto llevó a que por algún tiempo (y en la actualidad en pocos lugares en donde todavía se usa este tipo de pesticida), las dioxinas llegaron hasta nosotros no solo por el aire sino que directamente por los alimentos. Son lipofílicos, es decir solubles en las grasas y sus moléculas están unidas por enlaces fuertes que les dan una vida media entre los 7 y los 30 años, por esto se les llama moléculas persistentes. Existen una variedades de dioxinas, siendo las más tóxicas la 2,3,7,8 tetraclorodibenzodioxina (TCDD) .....

.... two weeks to go away if they don\'t lead to death. This bacterial pathogen is considered extremely dangerous and is probobly armed. Salmonella Typhi has been on the loose for many years and was cuased a lot of havoc and done a lot of damage over the years. Typhoid fever affects 17 million people worldwide every year, with approximately 600,000 deaths. To protect yourself from typhoid fever, aviod risky food and drinks and get vaccinated aginst typhoid fever, and wash your hands carefully a lot to make sure you have not touched something infected with Salmonella Typhi. Here .....

.... every opening on the body. You see the blood spattered room and pools of black vomit, expelled during the epileptic convulsions that accompany the last stages of death. Their hearts have bled into themselves, heart muscles softened and hemorrhaging , the brain clogged with dead blood cells (sludging of the brain), the liver bulging and yellow with deep cracks and the spleen a single hard blood clot. Babies with bloody noses born with red eyes lay dead from spontaneous abortions of affected mothers. It is the human slate-wiper, the invisible ultimate death, the filovirus na .....

.... could be hazardous. We have come to believe that all human beings are equal; but even more firmly, we are taught to believe each one of us is unique. Is that idea undercut by cloning? That is, if you can deliberately make any number of copies of an individual, is each one special? How special can clones feel, knowing they were replicated like smile buttons. "We aren't just our genes, we're a whole collection of our experiences," says Albert Jonsen. But the idea, he adds, raises a host of issues, "from the fantastic to the profound." When an .....

.... dark figure that is colored by white markings and banded legs. Its proboscis or snout is mostly black with regard to the white palp tips (Russel 1996). The dorsal pattern of white scales on the scutum is in the shape of a ‘lyre’ with two central based stripes that contrast with the dark scales present on the insect (Womack 1993, Russel 1996). Its wings are dark scaled and femur and hind legs are pale scaled for about three-quarters, and dark scaled for about two-thirds (Russel 1996). The first through the fourth segments of the hind tarsi are characterized by .....

.... in improper sites, can seep into underground water supplies and contaminate huge areas. If the land that is intoxicated supports plant life, most of the plants and trees will die off. If humans occupy the area, it could cause serious illness or death. For example, an area by Niagara Falls (US side) was used during the 1930s by a chemical company to dump its waste. Most of them were hazardous, and the containers that held the chemicals later (after the company had gone out of business) began to leak. The chemicals spread for miles killing off plants and causing cancers and .....

.... Canada and Scandinavia. At first, this was looked at as an interesting situation, rather than a growing problem. Since that time, much research has gone into identifying the sources of acid rain and the damage that it causes. As research continued, the situation reached catastrophe proportions in the late 1970's. By this time, thousands of lakes in Canada and Scandinavia had been declared dead, devoid of life, while emissions of acid gasses continued to rise. Acid Rain Chemistry As mentioned earlier, the term acid rain is used to describe a variety of different types of acid .....

.... is done with another drug, or a substance such as sugar, starch, powdered milk, or quinine. Street heroin can also be cut with strychnine or other poisons. The reason heroin is one of the most deadly drugs is because there are varying rates at which the drug is diluted. Therefore a user never knows exactly how pure the drug is, hence, they do not know how much of the drug they should take, often leading to an overdose. Like alcohol, heroin is a depressant that slows down all the body functions. But heroin differs from alcohol in two very significant ways. It does not destr .....