.... was imported from Europe during this period. This new organism was introduced to a new habitat free from traditional parasites, predators and competitors, purple loosestrife thrived in the environmental conditions and by 1880 was rapidly spreading north and west through the canal and marine routes. Purple loosestrife stands also increased due to the importation of seeds and root stalks by horticulturists. It was introduced to many communities as an herb, an ornamental garden flower and as a desirable honey plant. One of the earliest reported studies of purple loosestrife being a problem .....

.... and other halogens. Chlorine can support combustion; if a candle were to be thrown into a vessel of chlorine, it would continue to burn, releasing dense, black clouds of smoke, The chlorine combines with hydrogen of the paraffin, forming hydrogen chloride, and uncombined carbon is left in the form of soot. Soot is black residue from fuel. Chlorine replaces iodine and bromine from their salts. Dry chlorine is somewhat inert or not able to move, but moist chlorine unites directly with most of the elements. History Chlorine was discovered in 1774 by Karl Scheele. Humphry Davy prov .....

.... 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. Victims develop fever, chills, headaches, muscle aches, and loss of appetite. The patient will suffer vomiting, diarrhea, abdominal pains, soar throat, and chest pain as the virus progresses. The blood fails to clot and patients may bleed from injection sites as well as into the gastrointestinal tract, skin, and internal organs. Bleeding from the eyes and lips have also have .....

.... on whether or not the cloning of humans as well as animals is ethical or even moral. Also there has been much discussion as to whether or not the benefits of cloning outweigh the dangers. WHAT ARE THE BENEFITS IN CLONING RESEARCH? There is no doubt that Dr. Wilmut's new discoveries have brought an uproar of excitement between not only the scientific community, but the general public as well. Groups such as farmers, surgeons and even environmentalists have shown various interests in cloning research. The farming community has expressed much intrigue in cloning for the purpose of bein .....

.... the Columbia Basin to form the Columbia River. Water carries soil, silt, and debris downstream. The constant movement of material in the river cuts and shapes the river basin into the land. This movement is a slow and inefficient use of energy. According to White, only two percent of water's potential energy results in the work of erosion. The other ninety-eight percent of water's energy was lost as water molecules rub against themselves, the river bed, and the river banks. This energy was released as heat into the river. Often the energy of flowing water was not recognized. Th .....

.... study. Some examples are health, food, pollution and fresh water. The underlying link between all of these areas is water. The following four articles reveal that the water supplies that we all depend on are being used at an unsustainable rate. There is not enough fresh water on this planet for current growth rates to continue. The Public Broadcasting Company has posted on the Internet a timeline detailing the Earth's population at different years. According to this Population Timeline, the population in the "year 1954 was three billion"(2), in the "year 2000 the population is at approximat .....

.... and nitrogen oxides react with water, oxygen, and oxidants. This forms a mild solution of sulfuric acid and nitric acid. Sunlight increases the rate of most of these reactions. Rainwater, snow, fog, and other forms of precipitation containing those mild solutions of sulfuric and nitric acids fall to the earth as . Water moves through every living plant and animal, streams, lakes, and oceans in the hydrologic cycle. In that cycle, water evaporates from the land and sea into the atmosphere. Water in the atmosphere then condenses to form clouds. Clouds release the water back to the earth .....

.... bacterial pathogen is considered extremely dangerous and is probobly armed. Salmonella Typhi has been on the loose for many years and was cuased a lot of havoc and done a lot of damage over the years. Typhoid fever affects 17 million people worldwide every year, with approximately 600,000 deaths. To protect yourself from typhoid fever, aviod risky food and drinks and get vaccinated aginst typhoid fever, and wash your hands carefully a lot to make sure you have not touched something infected with Salmonella Typhi. Here are some ways to keep a watch out for Typhoid, at a resturant, ma .....

.... the body. Without at least one properly functioning gene, children have no way of converting deoxyadenosine (a waste product) into inosine. This leads to the rapid build-up of deoxyadenosine in the system, which becomes phosphorlyzed into a toxic triphosphate, which kills T-cells. The result is an almost complete failure of the immune system and early death. Previous treatment options included bone marrow transplants, which worked well with matched donors. A major breakthrough occurred with the development of polyethylene glycol coated ADA (PEG-ADA). This treatment introduces coated A .....

.... in breathing, very noisy breathing. Constant coughing or a feeling of a lump that doesn’t go away are also signs of larynx cancer. Tumor development in the subglottis is very unusual and rare. As a tumor grows it may cause pain, weight loss, bad breath, frequent choking on food, and hard swallowing. Only qualified doctors are able to tell if any of the signs are really symptoms of the cancer. A person with larynx cancer can be treated according to the person’s age, general health, and preferences. The size of the tumor, location of the tumor, and whether the cancer h .....