.... aside. It was not until the late 1800s that people again began to understand that epilepsy was caused by a brain malfunction. Two European physicians, John Hughlings Jackson and W.R. Gowers, studied people with epilepsy at the National Hospital for Paralyzed and Epileptics in London and proved Hippocrates' theory that epilepsy is a brain malfunction. Still, the 19th century health care systems in Europe isolated people with epilepsy and forced them to live in colonies away from society. Until as late as the 1950¡¦s, people rarely talked about their epilepsy and therefore hid the disorder from the public. While there are some recognized causes to epilepsy the vast major ....

.... a nucleus from a heavy element is bombarded with neutrons. The nucleus breaks into two pieces, releasing energy and two or more neutrons. Each of these neutrons has enough energy to split another heavy nucleus, allowing the process to repeat itself. This is the chain reaction that makes nuclear weapons possible. In a fusion nuclear device such as a hydrogen bomb, lightweight nuclei are forced to fuse at very high temperatures into heavier nuclei, releasing energy and a neutron. In order to squeeze the two nuclei together, an atomic fission bomb is usually used. A fusion reaction releases about four times more energy per unit mass than a fission reaction. The United Sta ....

.... types of Down syndrome, mosaicism and translocation, but these do not affect individuals as frequently as non-disjunction. Mosaicism is a mixture of two cell types, leaving the individual with some normal chromosomes of 46, and some affected ones with 47. Translocation occurs when part of the twenty-first chromosome breaks off and attaches to another cell. The total number of chromosomes is 46, however the excess material from the twenty-first chromosome results in the affects of the syndrome. With translocation, most cases occur sporadically, with no bearing on maternal age. These two types of this syndrome are very rare, being responsible for only 6 or 7 pe ....

.... all, his response occurs particularly during the morning and late afternoon, when the light is coming at more of an angle and the water stress is not as severe (Donahue and Vogelmann). Under these conditions the lamina of the leaf is within less than 15° from the normal to the sun. Many plants that exhibit diaheliotropic movements also show paraheliotropic response as well. Paraheliotropism minimizes water loss by reducing the amount of light absorbed by the leaves; the leaves orient themselves parallel to the sun’s rays. Plants that exhibit paraheliotropic behavior usually do so at midday, when the sun’s rays are perpendicular to the ground. This reorientation take ....

.... and combine with moisture in the air to form acid rain. The main chemicals in air pollution that create acid rain are sulfur dioxide and nitrogen oxides. Acid rain usually forms high in the clouds where sulfur dioxide and nitrogen oxides react with water, oxygen, and oxidants. This forms a mild solution of sulfuric acid and nitric acid. These chemical reactions that change air pollution into acid rain can take from several hours to several days. Sunlight increases the rate of these reactions. Rainwater, snow, fog, and other forms of precipitation containing these mild solutions of sulfuric and nitric acids fall to the ground as acid rain. Years ago, when smoke ....

.... of the copper industry are Arizona with 747,000 short tons, Utah with 187,000 short tons, New Mexico with 161,000 short tons. Some other leading countries are Chile with 1,422,000 short tons, United States with 1,203,000 short tons, Soviet Union with 650,000 short tons, and Zambia with 596,000 short tons. When copper is being mined, both Native copper and copper ore are usually found. The highest grade of copper ore is pale silvery gray. Miners used to be always in danger in copper mines. Today, we have reduced a fair amount of these hazards. Miners wear hats made of iron or very hard plastic. This is to protect them from falling rocks. Lamps are also attached to these ....

.... the patient in releasing repressed material. It was also suggested that psychiatrists themselves might develop more insight into the pathology of a diseased mind through self experimentation. 1,2 During the late 60s, became popular as a recreational drug. While it has been suggested that recreational use of the drug has dropped, a recent report on CNN claimed that 4.4% of 8th graders have tried it. is considered to be one of, if not the, most potent hallucinogenic drug known. Small doses of (1/2 - 2 ug/kg body weight) result in a number of system wide effects that could be classified into somatic, psychological, cognitive, and perceptual categories. These effects can la ....

.... commercial and residential fuel combustion together contribute most of the rest. In the air, the sulphur dioxide and nitrogen oxides can be transformed into sulphuric acid and nitric acid, and air current can send them thousands of kilometres from the source.When the acids fall to the earth in any form it will have large impact on the growth or the preservation of certain wildlife. NO DEFENCE Areas in Ontario mainly southern regions that are near the Great Lakes, such substances as limestone or other known antacids can neutralize acids entering the body of water thereby protecting it. However, large areas of Ontario that are near the Pre-Cambrian ....