.... of carbon with hydrogen and oxygen. Proteins such as hair, meat, and silk contain these and other elements such as nitrogen, phosphorus, and sulfur. More than six and a half million compounds of the element carbon, many times more then those of any other element, are known, and more are discovered and synthesized each week. Hundreds of carbon compounds are commercially important but the element itself in the forms of diamond, graphite, charcoal, and carbon black is also used in a variety of manufactured products. Besides the wide occurrence of carbon in compounds, two forms of the element--diamond and graphite, are depos .....

.... is very similar to that used to understand cancer. That is, schizophrenia probably occurs as a consequence of multiple "hits," which include some combination of inherited genetic factors and external, nongenetic factors that affect the regulation and expression of genes governing brain function or that injure the brain directly. Some people may have a genetic predisposition that requires a convergence of additional factors to produce the expression of the disorder. This convergence results in abnormalities in brain development and maturation, a process that is ongoing during the first two decades of life. (6) The abnormalitie .....

.... from an underground reservoir to the surface and is converted to steam by using changes in pressure. The steam and liquid are separated, with the steam turning turbines (generating electricity) and the water is injected back into the reservoir to maintain the chamber's pressure. Sometimes the hot water is used directly for home, and sometimes greenhouse, heating. It is also used to speed up the growth of aquatic animals (aquaculture). II. Dependency on Geothermal Energy Although we (the United States) are not taking advantage of all of the geothermal sources in the United States, the source is here today; it is not merely a h .....

.... are many different things that cause stress. One may be if you have a big term paper due and you want to do your best to impress your seminar leader. Another may be peer or family related. All in all it is things, events, situations, and people that cause stress. It is how we perceive them that will determine whether or not stress will be a result from the encounter. Not only negative situations are the cause of stress. Joy and happiness can also cause stress even though they are positive. In a sense, it is we then who choose our own stressors. Selye noted that with the absence of stress there is death. Current researchers are .....

.... itself to the endometrium. The eighth day is when implantation occurs. The fertilized egg then implants itself on the endometrium, the uterine lining, and begins to grow. The cell begins to grow and develop. By the 12th day the blastocyst has approximately two thousand cells in it. It has had time to attach itself to the endometrium and these anchors are called protuberances. Embryonic Development After about three weeks the tiny little heart is developed enough to start beating and has the ability to pump blood. At this time the blastocysts becomes an embryo. There are three layers that fo .....

.... exceptions are some of the aromatic compounds, including benzene and toluene. After a crude oil is spilled in a marine environment, many processes follow. Typical crude has a density of about 0.85, more or less, and this factor combined with winds, wave action, and currents leads to spreading, which is very rapid during the first 24 hours. During that period most of the components having boiling points below 200[deg.]C volatilize. As a result some of the toxic chemicals such as benzene are removed. (The composition of the floating mixture is further changed immediately and later by photooxidation, biodegradation, dispersion, an .....

.... its long-term effects upon the environment. Because MTBE is highly water-soluble, it dissolves in water, leading to higher concentrations of MTBE in many lakes in the California Sierra Nevada mountains and in many groundwater supplies. Hence, by addressing only one component of a system separately, the EPA failed to see the ramifications of our apparent solution. This myopic approach to environmental remediation commonly subverts our good intentions to solve environmental problems and demonstrates a lack of understanding of how inter-related systems work. It is my goal to aid in our understanding of environmental pollution on a g .....

.... from eager investors only phone calls from reporters were coming in asking about this market. I feel that now would be a great time to invest in biotechnical companies specializing in agricultural and medicinal cloning. This article says nothing about the great potentials of long term investment. Long term investment especially in the medicinal field is incredibly profitable. Just as in other controversial investing opportunities I feel that investors will find they could have made a lot of money if they invested in this area. Ten to fifteen years from now this agricultural cloning will be a commonly routine thing and pric .....

.... whereas others prove to be adaptive, and their numbers increase. The elimination of the unfit, or the "survival of the fittest," is known as Natural Selection because it is nature that discards or favors a particular being. Evolution takes place only when natural selection operates on apopulation of organisms containing diverse inheritable forms. HISTORY Pierre Louis Moreau de Maupertuis (1698-1759) was the first to propose a general theory of evolution. He said that hereditary material, consisting of particles, was transmitted from parents to offspring. His opinion of the part played by natural selection had .....

.... a sizeable duration of time. The best method of fighting the hanta virus is prevention. By controlling the rodent population and preventing them from entering houses and sheds, the risk of infection can be lowered. Furthermore, educating those in high-risk areas of the signs of the disease and what to do about them significantly lowers the likelihood of death. The virus cannot spread from human to human even during its peak state, but since exposed persons may not show symptoms for some weeks the likelihood of other people becoming infected by the same source is considerable. For this reason it is important that those living i .....