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Aluminum: The Element

... 1827 and 1845, Friedrich Wohler, a German chemist, improved the process by using metallic potassium. He was the first to measure the specific gravity of aluminum and show it'd lightness. In 1854, Henri Sainte-Claire Deville obtained the metal by reducing aluminum chloride, with sodium. Deville displayed pure aluminum at the Paris exposition of 1855. Aluminum the most abundant metallic constituent in the crust of the Earth. It is never found as a non-metal. It occurs most commonly as aluminum silicate or as a silicate of aluminum mixed w ...

Number of words: 326 | Number of pages: 2

Lyme Disease

... tests; it can be troublesome to treat in its later phases; and its prevention through the development of an effective vaccine is hampered by the elusive nature of the bacterium. was first recognized in 1975 after researchers investigated why unusually large numbers of children were being diagnosed with juvenile rheumatoid arthritis in Lyme and two neighboring towns. The investigators discovered that most of the affected children lived near wooded areas likely to harbor ticks. They also found that the children's first symptoms typically st ...

Number of words: 2971 | Number of pages: 11

Gene Therapy 2

... technologies, techniques, strategies and ideas for transferring genes have been presented. William French Anderson, Michael Blaise, and Ken Culver performed the first successful gene therapy on a human in 1990. They developed a protocol for treating Adenosine deaminase (ADA) deficiency, a severe combined immune deficiency, also known as the "Boy in the Bubble disease." ADA deficiency is a result of inheriting two copies of the defective ADA gene. Possession of a normal gene leads to the continuous, regular production of ADA in cells throu ...

Number of words: 3631 | Number of pages: 14

Local Area Network Bridges

... a forwarding decision with each received frame regarding where to send the frame so that it reaches its destination. There are two different bridge standards: Source-Routing (SR), which is common in Token Ring environment, and Transparent Spanning Tree (TST), which common in Ethernet environment. The IEEE standard for MAC bridges is ANSI/IEEE 802.1D: MAC Sub-layer Interconnection. Bridge Routing Requirements In general, LANs are low-cost, low-delay, high-bandwidth (e.g., 1-10 Mbps) broadcast channels. A bridged LAN environment preserves the ...

Number of words: 1000 | Number of pages: 4

Hurricanes

... not know how this happens. But when it does, it's the first step in the birth of a hurricane. With the lid off, the warm, moist air rises higher and higher. Heat energy, released as the water vapor in the air condenses. As it condenses it drives the upper drafts to heights of 50,000 to 60,000 feet. The cumuli become towering thunderheads. From outside the storm area, air moves in over the sea surface to replace the air soaring upwards in the thunderheads. The air begins swirling around the storm center, for the same reason that th ...

Number of words: 594 | Number of pages: 3

The Canada Goose

... these are: Canadian Goose, Canadian Honker, Honker, Honker Goose, Big Honker, Old Honker, Boy Goose, Bernache (French for Barnacle Goose), Big Mexican Goose, Blackee, Blacknecked Goose, Brant, French Goose, Northern Goose, Reef Goose, Ringneck, Wavy, and White-cheeked Goose (Wormer). The Canada Goose has excellent eyesight which makes it difficult to hunt because the Goose can see the hunter well before the hunter ever sees the goose (Wormer). This eyesight is essential for flying though, a Canada Goose can see three quarters of a sphere w ...

Number of words: 3286 | Number of pages: 12

Life Sciences SIG: Gut Issues - Essay About Dietary Fibers

... like disorders of the large intestine or colon. These, too, were afflictions of of the upper classes of old. Why? Because in general the rich refined their food, along with their lives, and so stripped it of an odd but essential ingredient called dietary fibre. Like its fellow carbohydrates, the various types of dietary fibre are the product of sunlight, water and carbon dioxide combining in green plants. Most form part of plant cell walls. But unlike the other carbohydrates, fibres do not break down into sugars in the human ...

Number of words: 534 | Number of pages: 2

The Creation Of The Universe

... to us. We question the existence of God, or the creation of mankind rather than blindly accepting faith-filled beliefs we may received from our parents as children. Perhaps it is because we live in a nation filled with many peoples of different beliefs whose Gods are all so varied and different that it is difficult to fathom that they are all the same divine being. It is also plausible that we just have a desire to quench the thirst for knowledge that lies deep within ourselves. As for myself, I cannot believe in a being which created a uni ...

Number of words: 1818 | Number of pages: 7

Hemp: The Truth About The Earth's Greatest Plant

... drug. Hemp was banned because it was a competitive threat to the wood industry. Corporations that profited from the demise of hemp spread rumors that marijuana was a major drug problem, which it was not at the time. They also propagated a campaign that it was a drug that induced uncontrollable violence, another complete falsehood. Hemp is the plant scientifically known as cannabis sativa. It is referred to as hemp when it is grown for its fibers, stem, and seeds. Its leaves and flowers produce the drugs marijuana and hashish. However, s ...

Number of words: 820 | Number of pages: 3

Male Pattern Baldness

... hair loss begins to start around the age of 30 at the temples. Never the less, the condition is more of a psychological problem than a medical. The condition androgenic alopecia is the result of the androgen on the hair follicles that have genetic receptor sites, in other words is resulted by the presence of endocrine hormones (like testosterone) on the hair follicle (which is where the hair is produced) that have genetic receptor sites. usually is a symmetrical disease, so if there is a non-symmetrical area of baldness, it is not the ...

Number of words: 324 | Number of pages: 2

Protein Synthesis

... between the DNA and RNA bases and the RNA develops a strong sugar backbone. The DNA molecule then recoils.ATP is needed for transcription to occur. Translation- Translation of RNA occurs when the transcribed RNA from the nucleus , which is now called messanger RNA [mRNA] as it contains the protein information. This mRNA leaves the nucleus through a nuclear pore, DNA is too large a molecule to do this, to the cytoplasm. In the cytoplasm there are free transfer RNA [tRNA] molecules which hve three protruding bases these sets of three on the ...

Number of words: 336 | Number of pages: 2

Future Psychology

... such as alcohol-abuse, risky scientific research or biased nationalism. We might say goodbye to such things as war, secrecy, faceless social disaffection, and public powerlessness. Soon enough it could be goodbye to dangerous stress, tobacco, burgers, serial killings, muggings, and smog. Times change. Many of today’s accepted virtues might one day be judged as crimes against humanity and nature, which leads to the question: What kind of world do you want to live in? Our ancient habit is to stumble backwards into the future. We feel ...

Number of words: 1638 | Number of pages: 6

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