... material used today. It is used for diodes, transistors, integrated circuits, memories, infrared detection and lenses, light-emitting diodes (LED), photosensors, strain gages, solar cells, charge transfer devices, radiation detectors and a variety of other devices. Silicon belongs to the group IV in the periodic table. It is a grey brittle material with a diamond cubic structure. Silicon is conventionally doped with Phosphorus, Arsenic and Antimony and Boron, Aluminum, and Gallium acceptors. The energy gap of silicon is 1.1 eV. This value permits the operation of silicon semiconductors devices at higher temperatures than germanium. Now I will give you so ...
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... points. In industry, Gamma rays are also used for detecting internal defects in metal castings and in welded structures. Gamma rays are used to kill pesticides and bugs in food. Gamma rays are also used in nuclear reactors and atomic bombs. Gamma rays are often used in the food industry. The radioisotopes preserve foods. Although the rays never come in contact with the food, Beta radiation kills various organisms such as bacteria, yeast, and insects. Gamma rays are sometimes used in science. They are used to detect Beryllium. They also played a very important role in the development of the atomic bomb. Gamma Rays can be very dangerous to use or be in contact wit ...
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... It states that Stimulating the resistance of cslve use or such herbicides (Nature 559). " A lot of concern has come from one certain crop and that is maize, which was altered to an extent. The development was done by a company known to be Swiss, called "Ciba-Geiby". That which was debated dealt with the Advisory Committee on Novel Foods and Processes (ACNFP) stating that "A gene resistant to the antibiotic ampicillin used in an early stage of the developmental process, could theoretically be passed to man via bacteria lodged in the gut of animals which eat the maize unprocessed (559)". In response to this attack, the company said that there would need to be a ...
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... a clone twin will be [years] younger than the original person. (1) Whether or not scientists should or should not clone humans is a tough question to answer. Legally, are scientists able to make clones? The answer is no. Should scientists be able to make a headless human? (body parts) Yes, as long as no law exists banning headless humans. Before going into this controversy, some background about what has happened in cloning would be useful. Two astonishing feats have been achieved in the scientific world. One is the cloning of a sheep named Dolly, and the other is the development of headless frog embryos. Dolly was cloned in Edinburgh, Scotland, at the Roslin ...
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... usually only grow to about 10 feet. They weigh an average of 1300 pounds. Manatees live in small family groups sometimes up to herds of 15-20. After a gestation of up to 6 months, usually a single pinkish calf is born. Manatees ferquently communicate by muzzle to muzzle contact and when alarmed they emit chripy squeaks. The number of manatees has been reduced over the past several years due to heavy hunting for their hides, meat, and blubber oil. Some governments, including the United States, have placed the manatees under the endangered species list. One practical reason for this is that they have proved useful in clearin girrigation and transport channel ...
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... a long restful sleep, stands, claps her hands, and calls spring to attention because this is the time of reawakening, a sudden surprising emergence after a period of concealed existence. I rise early because the days are becoming longer now. As I walk and explore this new morning, I cannot help but notice the activity that surrounds me. Gardens are being tilled and planted for the ground is warm and will soon break with sprouts of future bounty. Butterflies of every color are seen flittering and fluttering, while insects of all kinds are heard buzzing and humming. Butterfly and insects eagerly emerge from their winter homes intent on the tasks which lie ahe ...
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... and grain produced an extremely pleasant effect. Among primitive peoples, alcoholic drinks increased the excitement of tribal festivals. In more civilized nations, beers and wines in the daily diet were believed beneficial to health. During the 1800’s, a movement began in the United States to prohibit the manufacture and sale of alcoholic beverages. A constitutional amendment banning the beverages went into effect in 1920, but thousands of Americans defied the prohibition law. In 1930, the federal government estimated that about 800 million gallons of alcoholic beverages were being produced in the country annually. The prohibition amendment was repealed in ...
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... urban areas of the Americas, Ausrtalasia and Western Europe. Aids was and is spread still through infected hypodermic needles which drug abusers are affected by, but also through transfusion of the blood and its components. And sadly, whenever a mother is infected, the unborn child will almost positively receive the virus before, during, or after the pregnancy. The viruses which cause AIDS, otherwise known as Human Immunodeficiecy Viruses(HIV) were first discovered in 1983 cooperatively by Dr. Robert Gallo of the National Cancer Institute and Dr. Luc Montagnier of the Pasteur Institute in France. Aids is caused mainly by the HIV-1 virus, while the HIV-2 vir ...
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... with biology and geology. He made and wrote observations about coral reefs (1842), and volcanic islands (1844), but his greatest biological observations were those pertaining to his theory of evolution. Darwin's findings begin in the Galapagos Islands where he noticed a wide array of finches whose beaks were different sizes. He believed that the physical conditions on the island did not affect the birds' beaks, but it was the birds' feeding habits. For instance, the birds with the large, powerful beaks ate large seeds, while the birds with the small or fine beaks, ate small seeds or insects. He theorized that each bird was suited to its surrounding ...
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... is a pattern that exists within families from generation to generation. This indicates the possibility that autism is genetically related. However, no gene has been found. Every person with autism is different and there is no set type or typical person with autism. This is because autism is a spectrum disorder, meaning that symptoms and characteristics of the disorder can present themselves in a variety of ways, from mild to severe. Usually children with autism have deficiencies in both verbal and non-verbal communication. Their language develops slowly or not at all and they have very short attention spans. They often lack social skills and will spend tim ...
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