.... Kelvin (K). The Kelvin scale for Cryogenics goes from 173 K to a fraction of a Kelvin above absolute zero. There are also two main sciences used in cryogenics, and they are Superconductivity and Superfluidity. Cryogenics first came about in 1877, when a Swiss Physicist named Rasul Pictet and a French Engineer named Louis P. Cailletet liquefied oxygen for the first time. Cailletet created liquid oxygen in his lab using a process known as adiabatic expansion, which is a "thermodynamic process in which the temperature of a gas is expanded without adding or extracting heat from the gas or the surrounding system"(Vance 26). At the same time Pictet used the "Joule-Th .....

.... drug in the opiate family. It is typically sold as a white or brownish powder. There is also a form that is black and sticky known on the streets as “black tar heroin”. Opiates are drugs that are derived from a naturally occurring substance found in the poppy plant. Although the purity of the heroin that reaches the streets is becoming greater, most street heroin is cut or diluted. Usually this is done with another drug, or a substance such as sugar, starch, powdered milk, or quinine. Street heroin can also be cut with strychnine or other poisons. The reason heroin is one of the most deadly drugs is because there are varying rates at which the drug is dilu .....

.... of the theory that toppled Biblical science forever. Where did it all begin? What was the factor that started the ball rolling, and gave it the momentum to keep lurching ahead? "As a distraction from his sister's regime, Charles played solitary games in the vast family home. His father had become interested in the fashionable study of natural history and there were rooms full of exotic collections, stuffed animals and old bones. A massive greenhouse attached to the side of the house was a veritable jungle to a young boy and it was in this environment of learned eccentricity and an unforced seeking of knowledge that Darwin's fascination for natural history a .....

.... can be done to treat and prevent it is essential. According to the World Health Organization we began to see what AIDS truly was in the late 1970’s to early 80’s, mostly in men and women with multiple sex partners located in East and Central Africa, but also in bisexuals and homosexuals in specific 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. .....

.... a common correlate. Since these children do not meet the expectations of society and their learning environment they are usually met with anger, punishment, and rejection. In turn these children develop a low-self esteem and low levels of motivation (Morgan, 1997). The etiology of ADHD is still a mystery to researchers. Within the field there are many correlates to biological (genetic) and social causes. The present paper seeks to explore current research through investigating the social and bio-genetic influence of . Testing and treatments of those with ADHD will also be discussed. In accordance with Dulcan et al. (1997) ADD, ADD-H, ADHD, although not .....

.... they called rubidium from the Latin word meaning, "deepest red." * Where it is Found * Its Form * What it Looks Like * Physical Properties Rubidium is a fairly abundant element in the Earth's crust, there it is found in 310 parts per million (ppm). This makes it the 22nd most abundant element on Earth. It is found in many minerals, and brines, along with other elements. Seawater contains 0.2 ppm, twice the amount of Lithium found in the oceans. Traces are found in seawater plants and animal organisms. Very small traces of Rubidium are found in the leaves of tobacco, tea, and coffee, as well as some other plants. Rubidium is similar to li .....

.... forests, crop yields, and water supplies. It could also threaten human health, and harm birds, fish, and many types of ecosystems." The threat to human health is due to local climate. The reason why local climate threatens human health is that "extreme temperatures can directly cause the loss of life". And also many serious diseases appear in warm places. But not only is it that "warm temperatures can increase air and water pollution, which in turn harm human health" (ESP Health 1). The hot temperature, which could be the most direct effect of climate change, causes the heat problem. Because their cardiovascular system has to work harder to keep the body .....

.... for life after infection, usually kept under control by a healthy immune system. Almost anyone at any age can get mononucleosis. Seventy to 80 percent of all documented cases, however, involve persons between the ages of 15 and 30. Both men and women are affected, but studies suggest that the disease occurs slightly more often in men than in women. Doctors estimate that each year 50 out of every 100,000 Americans have mononucleosis symptoms. Among college students, the rate is several times higher. Mononucleosis does not occur in any particular "season," although authorities in colleges and schools, where the disease has been well studied, report that they see .....