PAPER Topics

... from tadpoles and injected them into unfertilized eggs. The nuclei containing the original parents’ genetic information had been destroyed with ultraviolet light. When the eggs were incubated, Gurdon discovered that only 1% to 2% of the eggs had developed into fertile adult toads. The first successful cloning of mammal was achieved nearly twenty years later. Scientists from Switzerland and the U.S. successfully cloned mice using a method similar to Gurdon’s, but required one extra step. After the nucleus was taken from the embryos of one type of mouse, they were transferred into the embryos of another mouse who served as the surrogate mother. This mouse went through the birthing process to ...

... altitude of sixty meters. You can hear ripping, rending, wrenching, screeching, scraping, tearing sounds of a vast machine breaking apart. L. Ray Silver, a leading author who covered the disaster at Chernobyl, said that within the core, steam reacts with zirconium to produce that first explosive in nature’s arsenal, hydrogen. Near-molten fuel fragments shatter nearly incandescent graphite, torching chunks of it, exploding the hydrogen. The explosion breaks every pipe in the building rocking it with such power that the building is split into sections (11-13). You look down at your body and notice that it feels hot and your hands look different. Unknown to you a tremendous amount of ne ...

... that can't be taken out, like an organ. In these cases, surgery alone is basically useless. Radiation therapy is another option, and many doctors prefer this in many cases. When a patient receives radiation therapy, gamma rays are sent in to treat the region that the tumor is in. Patients usually receive five to eight weeks of treatments every day, but they don't have to stay in the hospital. Radiation works because when the high amount of rays treat the tumor, it will cause enough damage to the cells to kill them. Radiation does damage the healthy tissue, but they can recover easily. So, radiation therapy can kill the cancerous tissue, while the healthy tissue can still function. I ...

... the younger men, those who made up the bulk of the army surgeons, usually held a medical school diploma along with an office internship. Little attention was paid to clinical instruction, and in most cases the laboratory was all but forgotten. Further, stethoscopes, thermometers, syringes, and the like were widely used in Europe while many doctors here at home had never seen them let alone used them. In regard to ability and competence, there is no reason to believe the doctors in the North and the South differed in any significant way. While the North was home to more prestigious medical institutions, the South was learning to become less dependent on the North in this area at the out ...

... focused their attention on other problems plaguing the nation. Doctors prescribed antibiotics frequently, often when they were not even needed. According to a 1998 report by the Institute of Medicine, up to fifty percent of antibiotics are prescribed unnecessarily. This blatant overuse of antibiotics had a profound effect on the efficiency of the drugs in the future. The wonder drugs that had been so effective in treating an array of diseases had started to lose the battle against increasingly resistant bacteria, often referred to as superbugs. The problem of is rooted in the overuse of many antibiotics. Doctors used antibiotics to treat countless diseases and some bacteria became r ...

... pollutants into the atmosphere. The major pollutants from these source are nitrogen- oxides, sulfur-oxides, and carbon dioxide. The rapid growth of population and industry, and the increased use of automobiles and airplanes has made a very serious and complicated problem. The air we know today and breathe has become so filled with pollutants that it can cause little health problems to fatal health problems such as lung cancer. Polluted air also harms most kinds of plants, animals, the materials that building are made up of, and fabrics of clothes, and decoration. In addition it causes damages by altering our Earth's atmosphere. The damage that is caused by cost the p ...

... one fell swoop . . . with one simple plant. It is ignorance and the maintenance of the status quo that has blinded and crippled our ability to realize this resource. INTRODUCTION A plant exists that is so strong that it can be grown without requiring chemicals in almost every part of the world. Many have touted this plant as a possible way in which to wean society from its dependence on fossil fuels for energy and the need to log forests for pulp, paper and wood. It is even said that this plant could adequately clothe and feed the world more efficiently and cheaply than we can do now! Why is this miracle plant not used if all evidence points to its versatility? The answer is bogged ...

... that we called senility. Some people develop this condition when they are as young as 40 years of age. However, the disease is most common in persons over the age of 65. It is estimated that approximately 10 percent of persons over 65 years of age may have and that in persons over the age of 85, up to 50 percent may be affected. is not a normal part of the aging process. It is not contagious, and it is not known how it can be prevented. While the physical changes in the brain are very similar among different people the behavioral and psychological symptoms that result are complex and may differ from person to person(Kawas, 80). These symptoms lead to a form of dementia which is ...

... winter breeding seasons when the birds were most vulnerable. By 1957, when the Nene was named the State Bird, rescue efforts were underway. Conservationists began breeding the birds in captivity in hopes of preserving a remnant of the declining population and, someday, successfully re-establishing them in their native habitat. Other programs for returning captive birds to the wild life was difficult, but more efforts have been successful. Some other efforts used to help this bird have been to get donations for the bird and have schools help out by donating money to organizations. There are now small populations of Nene on the islands of Hawaii, Maui, and Kauai. There are about 10 ...

... 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-Thompson Effect," a thermodynamic process that states that the "temperature of a fluid is reduced in a process involving expansion below a certain temperature and pressure"(McClintock 4). After Cailletet and Pictet, a third method, known as cascading, was developed by Karol S. Olszewski and Zygmut von Wroblewski in Poland. At this point in history Oxygen was now able to be liquefied at 90 K, then soon after liquid Nitrogen was obtained at 77 K, and because of these advancements scientist all over the world began competing in a ...