... and to not get sick or dizzy. Neon is an element that is lighter than air. The element is found most common in the atmosphere of the earth. It is also found in the earth’s crust. Sir Walter Ramsey and Morris W. Travers discovered it in 1898. Its uses include electric signs, lamps, and lasers. Argon is the most abundant and most used noble on earth. Sir Walter Ramsey discovered it by Lord Rayleigh and in 1894. Argon makes up about 1.2 % of the earths atmosphere. It is found naturally in rock and in the air. It is used for electric light bulbs and fluorescent tubes. It is also used a lot in industry. Krypton a very rare noble was discovered by Sir Walter Ram ...
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... with the same problem. You try to fly, but your wings are too heavy. You flap and flap but it is hopeless. Sinking to the bottom of the beautiful waters, you wonder what that sticky black killer was. It's simple. It's crude. It's oil. This scenario is nothing but a harsh reality that most people were unconcerned about until the disaster of the Exxon Valdez. The Valdez spill, tragically unnecessary though it was, has served as a laboratory for scientists, in which they can study the effects of oil pollution and experiment with new cleanup methods. It has also served as a costly lesson in the pitfalls of petroleum shipping and the shortcomings of emergency pla ...
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... The heroes were taken from his observations of children. In 1902, Dr. G. F. Still, described the behavior of a group of hyperactive children. He knew of no medical reasons for their behavior and made no mention of their educational needs or social skills. He said that part of the problem with ADHD children was "deficient training in the home." In 1923, researcher, F. G. Ebaugh, was one of the first to publish a professional paper recognizing ADHD as a long-term problem requiring cooperation and intervention by several professional disciplines. Over the past four decades, dozens of labels have been used for a collection of traits that has come to be ...
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... a phone line, it's a lifestyle. Some s do that in parallel with the standard voice service, all on the same line and at the same time. Some deliver higher speeds or wider bandwidth - the more dense the data you are sending, the wider the bandwidth you need for quality and speedy transmission. Still others deliver higher capacity for downloading than for uploading data. There is a whole portfolio of technologies coming on stream to match user needs at home and at work. The new millennium is about to put a completely new dimension into those telephone lines we have all come to take for granted. Already there are towns and cities around the globe which really ...
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... a membrane made of 10 nm projections, and host cell membrane. They contain a unique single-stranded molecule of noninfectious (negative sense ) RNA. 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 vi ...
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... about 1000 to 1500 stars. Trying to tell which is which is hard. The help by breaking up the sky into more manageable bits. They are used as mnemonics, or memory aids. For example, if you spot three bright stars in a row in the winter evening, you might realise, "Oh! That's part of Orion!" Suddenly, the rest of the constellation falls into place and you can declare: "There's Betelgeuse in Orion's left shoulder and Rigel is his foot." And once you recognise Orion, you can remember that Orion's Hunting Dogs are always nearby. Where did the come from? OK, so we know the are helpful for remembering the stars, but why would people want to do that (besides an astronome ...
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... living organism remains the same as in the environment around them because the organism constantly eats and replenishes it, if it were to die, the ratio would change greatly after many years. It is the difference between this ratio now and the time is died that allows a date for it to be established. Potassium-argon dating, another dating method, is possible due to volcanic ash and rocks found near many fossil sites. Rocks and ash created in this manner contain potassium-40, but no argon. As time passes, the potassium-40 decays into argon-40. In the laboratory, the sample is reheated, and since argon-40 is a gas, it is released. The ratio of argon-40 released ...
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... in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not become acid over night. It happens over a period of many years, some times decades. The changes are usually to gradual for them to be noticed early. At the beginning of the 20th century most rivers/lakes like the river Tovdal in Norway had not yet begun to die. However by 1926 local inspectors were noticing that many of the lakes were beginning to show signs of death. Fish were found dead along ...
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... usually examine the patient and prescribe an antibiotic. Antibiotics are being used as a way to solve medical problems. The heavy use of antibiotics is causing a threat to the population. They are so widely used and are beginning to become a contaminant in the environment. When used so frequently, antibiotics are found in the sewers, septic tanks, and even receiving waters. With antibiotics being so abundant in these places, the microbes here are now becoming resistant. With all of the sterilization and sanitation precautions, we would not expect to come in contact with these microbes. Reality is, we do. We come in contact with these microbes and sometime ...
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... estimate that each year 50 out of every 100,000 Americans have symptoms. Among college students, the rate is several times higher. does not occur in any particular "season," although authorities in colleges and schools, where the disease has been well studied, report that they see most patients in the fall and early spring. Epidemics do not occur, but doctors have reported clustering of cases. Transmission: EBV, the virus that causes most cases of , infects and reproduces in the salivary glands. It also infects white blood cells called B cells. Direct contact with virus-infected saliva, such as through kissing, can transmit the virus and result in . Someone ...
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