.... into various kinds of foams. In the 1930's, household insecticides were bulky and hard to use, so CFCs were created because they could be kept in liquid form and in an only slightly pressurized can. Thus, in 1947, the spray can was born, selling millions of cans each year. Insecticides were only the first application for CFC spray cans. They soon employed a number of products from deodorant to hair spray. In 1954, 188 million cans were sold in the U.S. alone, and four years later, the number jumped to 500 million. CFC filled cans were so popular that, by 1968, 2.3 billion spray .....

.... men and their condition when asleep.2 Other descriptions included an analysis of consciousness as a form of relationship or act of the mind toward objects in nature, and a view that consciousness was a continuous field or stream of essentially mental "sense data." The method believed by most early writers in determining consciousness was introspection—looking within one’s own mind to discover the laws of it’s operation. This belief was limited when it was apparent when observationalists could not agree on observations. Obviously due to the differences in one’s own idea of in .....

.... The virus is composed of 7 polypeptides, a nucleoprotein, a glycoprotein, a polymerase and 4 other undesignated proteins. Proteins are produced from polyadenylated monocistronic mRNA species transcribed from virus RNA. The replication in and destruction of the host cell is rapid and produces a large number of viruses budding from the cell membrane. Epidemics have resulted from person to person transmission, nosocomial spread or laboratory infections. The mode of primary infection and the natural ecology of these viruses are unknown. Association with bats has been implicated directly in at .....

.... uranium is the last and heaviest element present on earth. This was demonstrated by Dimitri Mendeleev in his famous perodical classification of the elements by chemical properties and increasing atomic mass. Experimentation with uranium lead to many discoversies such as the X-ray by Wilhelm Röntgen, on November 8, 1895. Wilhelm Röntgen, was awarded the first Nobel prize in 1901 for the development of the X-ray. Uranium is weakly radioactive, decaying slowly but inexorably at the rate of one milligram per tonne per year. It is transformed into inactive lead through a chain of radioelem .....

.... process is called a chain reaction. uses the uranium-235 element because it is the easiest of all atoms to split apart. Uranium-235 is made up of many protons and few neutrons. Protons naturally repel one another so a nucleus made up of many protons tends to ‘fly apart’ more easily. In addition, uranium makes a good nuclear reactor because it can sustain a series of fission reactions, each time producing more neutrons in chain reaction. Therefore, uranium-235 can produce a steady flow energy output. Uranium can be found in the United States, Canada, and through the world. Uranium .....

.... can be used for anesthesia. Also dichloromethane, or paint stripper and 1,2-dichloroethane which is a dry cleaning fluid. Here is a sample reaction where a halogen replaces a hydrogen. CH4(g) + C12(g) ----> CH3Cl(g) + HCl(g) There are many uses for alkanes, for instance: Propane is used in gas grills, butane is used in cigarette lighters, through various reactions scientists can make paint stripper, anesthesia or dry cleaning fluid. The Pentanes and Hexanes are also highly flammable and make really cool explosions. Heptane, octane and nonane make up gasoline. The "Octane Scale" .....

.... cases they help more than they hurt. For example, it is estimated that the food supply would reduce by forty to fifty percent without the use of on our crops. The FDA, EPA, and the Department of Agriculture try to ensure that the use of is necessary to the extent in which they actually are used by performing studies and proposing bills and laws to Congress. There is no dispute that are harmful. The purpose of is to kill certain fungi, plants, and even animals, so it seems only natural that they would have some effect on humans as well. An example of how these societies have helped to .....

.... feelings. They have no idea that what is wrong with them is that they have depression. They might put the blame on some other stressful thing or even other people. Changes in the level of energy a person has can be caused by depression. One possible reason for this ties into their eating and sleeping habits. If a person starts to eat less, or sleep less they will notice a drop in how much energy the have. Some people with depression may become edgy or fidgety. Also the people may become very easily upset or agitated. Even if the person has gotten enough sleep and food they m .....

.... organisms need to be adapted to the microenvironment of the rock pool, as conditions are considerably different to those of a ‘normal’ marine environment. The rock pools spend some of their time completely submerged by the sea and other times exposed to the air. When exposed the organisms of the rock pool are part of a much smaller body of water than normal. This smaller volume of exposed water is likely to be changed significantly, mostly as a result of heating by the sun (Brehaut, 1982). Heating of exposed rock pools mean that the organisms within have to cope with considerable abiotic .....

.... measuring a fresh quantity of LSD, he accidentally dosed himself and was overcome with confusion. He was then obligated to leave work due to “a sensation of mild dizziness” and “extreme activity of imagination.”(Discovery, 2) On April 19, 1943, at exactly 4:20 pm, Dr. Albert Hofmann ingested 0.25 mg. of liquid LSD and journeyed on the first intentional “acid trip.” In 1947, Dr. Hofmann’s employers, Sandoz Laboratories, began marketing LSD in Europe. It was introduced into the United States a year later. They advertised it “as a cure for e .....