.... it was first detected. It first appeared in in 1976 in Zaire, followed by an out break in western Sudan almost immediately afterwards. The third out break in Sudan in 1979 was smaller with 22 deaths out of the 34 cases. The first outbreaks in Zaire and western Sudan were large resulting in 340 deaths out of the 550 cases. The most recent outbreak is in Kikwit, Zaire. The outbreak appears to have started with a patient who had surgery in Kikwit on April 10, 1995. Members of the patient's surgical team developed symptoms similar to those of a viral hemorrhagic fever disease. The symptoms of Ebola hemorrhagic fever begin 4 to 16 says after infection. V .....

.... their parts stem from the single cell which is the fertilised egg. Likewise, many tumours are clones, derived from one aberrant cell which no longer obeys the normal rules of growth control. The offspring of organisms which reproduce asexually, like corals, are also clones; as are identical twins produced by the natural, or sometimes deliberate, splitting of a single embryo. Members of a clone are genetically identical and genetic identity has given cloning an additional more technical meaning: namely the procedures used to create a new organism whose genetic constitution is a replica of another existing individual. Such a feat can be achieved by substit .....

.... a blood sample. Klinefelter Syndrome is caused by a chromosome variation involving the sex chromosomes. The person with Klinefelter Syndrome is a male who, because of this chromosome variation, has a hormone imbalance. While Dr. Harry Klinefelter accurately described this condition in 1942, it was not until 1956 that other researchers reported that many boys with this description had 47 chromosomes in each cell of their bodies instead of the usual number of 46. This extra sex (X) chromosome causes the distinctive make-up of these boys. All men have one X chromosome and one Y chromosome, but sometimes a variation will result in a male with an extra X. This is K .....

.... to the wilderness that he considers “our natural home” is something very real to him. His concept of “Eco-Defense”, in which he gives a right to protect their home, is an original and unique way of thinkng of environmental protectionism. McKibben shows us the damage we have done to the natural world and makes a plea for an end. He was born to two journalist parents, married a journalist, and wrote for and edited the The New Yorker . Abbey and McKibben write differently but they are bonded in that they both demand change. Abbey and McKibben would agree that something is wrong with America’s attitude toward the environment. How .....

.... around the atom in a specific path. As they do this they are also rotating on there own axis. This movement causes an attraction or repultion from the electrons that are unpaird. They are moving in two directions though causing a negative and positive charge. In the case of magnatism though we find that these elements have a lot of unpaired electrons, in the case of iron, Fe, there are four. What happens then in the case of a natural magnet the unpaired electrons line up or the magnet in a specific mannor. That is all the atoms with unpaired electrons moving in a direction which causes a certain charge are lined up on one side and all the atoms with the .....

.... interferes with the ability of the placenta to feed the baby the nutrients it requires. Therefore the babies growth is slowed down. Carbon monoxide causes growing cells to be starved of oxygen, and effects the brain. This can lead to a low birth weight and higher chance of the baby dying at birth. Smoking is the single largest modifiable( changeable) risk factor in fetal growth retardation. Maternal smoking during pregnancy is also associated with genetic defects as well as an increased incidence of congenital malformations such as cleft palates, microcephalus, and clubfoot. Mothers who smoke one pack a day during pregnancy have an 85% increased risk of ha .....

.... occur as cryolite (Na3AlF6). Traces of other metal oxides in Aluminium oxide tint it to make it form stones (often precious) for example: chronium gives a red colour to rubies, and cobalt makes the blue in sapphires. How Aluminium deposits are formed Aluminium (like many other metals) is not found in it's pure form, but associated with other elements in rocks and minerals. An aluminosilicate such as felspar (KAlSi3O8) is the main constituent of many rocks such as granite, which is quartz and mica cemented together with felspar. These rocks are gradually weathered and broken down by the action of carbon-dioxide from the air dissolved in rainwater forming ‘k .....

.... understand what the epilepsy is and how it arises, we have to understand the main brain functions. “The human brain is a marvelously complicated organ; it has to be, for it controls every waking and sleeping activity, every conscious and unconscious thought and need and process that we engage in.” (Harry Sands and Frances C. Minters, 1977, p.2) The brain consists of nerve cells or neurons. Each neuron has an electrically charged part. It receives electrical signals from other neurons, and passes them to others. All the functions of the brain depend on electrical signals that are send from one neuron to another. The normal brain generates an electri .....