Science Essays
Salmonella Typhi (Typhoid Fever)
Salmonella Typhi (Typhoid Fever) Salmonella Typhi is a very contagious infection in the intestines that affects the whole body. It is called by a bacteria called Salmonella Typhi that is found in the stools of an infected person. Most people in the United States get typhoid as a result of visiting another country. Typhoid is spread when a person eats food or water contaminated by human waste (stool or urine) containing Salmonella Typhi bacteria. Typhoid fever mostly preys upon people f...
Psychology Dreams
Psychology-Dreams Dreaming Dreaming is a form of mental activity that occurs during sleep. The nature of dream activities has been characterized by many clinical and laboratory studies. These studies are more perceptual than conceptual: things are seen and heard rather than being subject to thought. Visual perception is present in almost all dreams, and auditory experience is 40 to 50%, but dreams are not necessarily visual imagery. Congenitally blind people dream in auditory and se...
Psychology
Psychology Introduction Psychology is a science and a study of behavior and mental processes. Some parts of psychology that we use in everyday life and in extra curricular activities are perception, learning, memory, thinking, and language. There are many extra curricular activities that uses these concepts but for now I will focus on the sport of soccer. I have played soccer since I was five years old and I feel I have built an insight in the sport. I will examine with you the percept...
Push pull theory
Push/pull theory Plants need much more water to survive than animals do, a sunflower must take in 17 times more water than a human of comparable weight. At least 500 pounds of water must be lifted from the roots to the leaves to make a single pound of organic tissue. This tremendous amount of water is required to undergo photosynthesis each and every day of a plant\'s life. But how does a tree lift hundreds of gallons of water hundreds of feet in the air against the force of gravity? Scienti...
Plate Tectonics
Plate Tectonics Plate Tectonics Prior to World War II, humans were conformed with the idea that the Earth and its continents had been basically unchanged since the beginning of time. A German meteorologist, Alfred Wegener observed that the coastlines of the seven continents could be fitted together almost perfectly like a jigsaw puzzle. If fitted together, the geological dating the land would match as well as other geological features. He believed that this was more than coincidence, w...
Polio
Polio Poliomyelitis, infectious virus disease of the central nervous system, sometimes resulting in paralysis. The greatest incidence of the disease, also known as infantile paralysis, is in children between the ages of five and ten years. The disease was described in 1840 by the German orthopedist Jacob von Heine. In its clinical form it is more prevalent in temperate zones. Symptoms The virus usually enters the body through the alimentary tract and spreads along nerve cell...
Pollution Getting The Best of
Pollution Getting The Best of Pollution is the introduction of harmful substances or products into the environment. It is a major problem in America and as well as the world. Pollution not only damages the environment, but damages us also. It has caused many problems ranging from lung cancer to the greenhouse effect. It is all among us and yet we continue to live in our own filth. What is the reason behind this flawed logic? The cars we drive, our left over trash, and the businesses we depen...
Prescribed Burning
Prescribed Burning It's a promising tool, this idea of prescribed burning to defuel forests and help restore ecosystem health. But it's risky business, too, and smoke clouds public acceptance. I THOUGHT FIRE SEASON HAD ENDED. BUT THE SCENT OF PINE SMOKE IN MY NOSTRILS LATE LAST OCTOBER TOLD ME SOMETHING DIFFERENT. Deep in Oregon's ponderosa paradise on Winema National Forest, my wife Maurine and I had just finished flagging a new interpretive trail as Forest volunteers. As we drove a rem...
Protein Synthesis
Protein Synthesis Protein synthesis is one of the most fundamental biological processes. To start off, a protein is made in a ribosome. There are many cellular mechanisms involved with protein synthesis. Before the process of protein synthesis can be described, a person must know what proteins are made out of. There are four basic levels of protein organization. The first is primary structure, followed by secondary structure, then tertiary structure, and the last level is quaternary str...
Pesticides are Affecting our F
Pesticides are Affecting our F INTRODUCTION Pesticides are chemicals designed to kill, control, or repel insects, plant diseases, weeds, rodents, and germs. (Most pesticides are used in agriculture production, to killing pests found on hundreds of different crops including fruits, vegetables, nuts, and cereal grains.) All these foods form a good majority of North America�s diet, and the majority of these foods consumed contain pesticide residues. Pesticides are also used to get ri...
Pesticides
Pesticides Pesticides: What are they? Pesticides are chemicals that are used to destroy pests. In the agricultural industry, pesticides are classified into two categories, carcinogenic and non-carcinogenic. A carcinogenic pesticide is a substance or agent producing or inciting cancer. Conversely, a non-carcinogenic pesticide is substance that does not produce or incite cancer. Most agricultural pesticides were registered in the 1950�s, with no standard regulations. The most cons...
Photosynthesis
Photosynthesis Photosynthesis 1. Would you illuminate your house plants with a green light bulb? Why or why not? It would not be a wise choice to put a plant under a green light bulb. The reason for this is that due to the fact that the leaves are green they reflect green light. This shining green light onto the flowers will cause photosynthesis to stop. Since the light is being reflectd, the cells do not get any light. With out light they cannot carry out the everyday occurance of pho...
Plant evolution
Plant evolution Plant Evolution A long 3000 million years ago the earth was not suitable for life as the atmosphere contained little to no oxygen and without this, deadly ultra violet rays from the sun bombarded the unprotected surface. This lead to life beginning in the ocean where it was safe from the sun's rays. It was here that life began with bacteria and small microscopic plants, called algae. Algae is the worlds oldest known fossil. Found in rocks of South Africa and Central Aust...
Origanum Vulgare
Origanum Vulgare Origanum Vulgare The culinary herb oregano is mostly used in foods. Oregano also known as the �pizza herb� is used in a number of Italian dishes as it goes especially well with tomatoes. All the flavors of oregano are prominent in Italian cooking and in robust dishes of certain other cuisine, such as Mexicans chili con carne. Italians call oregano the mushroom herb but use it with many other foods as well. The Spanish word oregano means marjoram. Oregano is also known...
Orion Nebula
Orion Nebula The Orion Nebula contains one of the brightest star clusters in the night sky. With a magnitude of 4, this nebula is easily visible from the Northern Hemisphere during the winter months. It is surprising, therefore, that this region was not documented until 1610 by a French lawyer named Nicholas-Claude Fabri de Peiresc. On March 4, 1769, Charles Messier inducted the Orion Nebula, M42, into his list of stellar objects. Then, in 1771, Messier released his list of objects for i...
Panda report
Panda report Giant pandas Description: Giant pandas are an endangered species. They are often called pandas or panda bears, although their scientific name is Ailuropda Melanoleuca. Being an omnivore, the giant panda�s diet consists of 99% bamboo along with small percentages of fish, pikas, rodents, vines, irises, crocus, and murices grass. Pandas eat in a sitting position and since they eat about twelve hours a day, they sit a lot! During these twelve hours the pandas will have co...
Pascals Triangle
Pascals Triangle The arithmetic triangle was developed in 1653 by Blaise Pascal. He named this triangle after himself and today it is known as Pascal's Triangle. It is an arrangement of certain whole numbers in a triangular pattern. Blaise Pascal was regarded as a brilliant man of his own time. He made contributions to science, mathematics, and religious philosophy. Pascal was born on June 19, 1623 in Clermont-Ferrand of central France. His father was a highly placed civil official a...
Nuke waste
Nuke waste Radioactive wastes, must for the protection of mankind be stored or disposed in such a manner that isolation from the biosphere is assured until they have decayed to innocuous levels. If this is not done, the world could face severe physical problems to living species living on this planet. Some atoms can disintegrate spontaneously. As they do, they emit ionizing radiation. Atoms having this property are called radioactive. By far the greatest number of uses for ...
Nutrition vs
Nutrition vs. sport performance The world is an orb of life. In its limited space all life forms compete to hold their own position. As Darwin concluded in his theory of evolution, “only the strong and most advanced survive, while the weak perish and are pushed aside.” Evolution, the theory we use today to fuel our need to win and succeed in any organized competition. It is this drive that results in the vigorous preparation athletes’ go through to become superior among...
Nutritional protocol for inflammation
Nutritional protocol for inflammation Nutritional Protocol For Inflammation When tissues are injured a specific reaction to the injury takes place. A collection of irritants and other chemical mediators are released into the injured area to aid in stabilization of the injured tissue, protection against further injury, and stimulation of healing at the injury site. These factors are referred to as the inflammatory cascade. And it includes substances such as histamine, bradykinin and ...
Oil Spills
Oil Spills Oil Spills: It will happen again Imagine that you are a just a small, ordinary seabird. It is March 24, 1987 and far away from you is an enormous tanker called the Exxon Valdez, coming at an astonishing speed. You do not worry, for these huge ships come along very occasionally in the Alaskan waters. The next thing you know when you turn around is that something wrong. The tanker is heading towards Bligh Reef, which is a mass of granite pinnacles. It crashes into the ree...
Nuclear powernuclear power
Nuclear powernuclear power Nuclear Power Most of the world’s electricity is generated by either thermal or hydroelectric power plants. Thermal power plants use fuel to boil water which makes steam. The steam turns turbines that generate electricity. Hydroelectric power plants use the great force of rushing water from a dam or a waterfall to turn the turbines. The majority of thermal power plants burn fossil fuels because thermal power plants are cheaper to maintain and...
Nuclear proliferation
Nuclear proliferation What is the status of the international nonproliferation of nuclear weapons? Outline Title I. Introduction A. “Floating Chernobyl” B. Something to think about II. Statistics A. Russia’s nuclear arsenal B. US’ nuclear arsenal III. Treaties A. START I B. START II C. START III IV. THREATS A. New Power Landscape B. Broken Command C. Broken Arm...
Nucleic acids
Nucleic acids DNA is the single most important molecule found within cells. It is a stable polynucleotide, which contains coded information for inherited characteristics. It is contained in chromosomes in the nucleus of an eukaryot cell. The essential features of the Watson-Crick model are summarised below. 1. The two helical polynucleotide chains are coiled around a common axis. The two chains have opposite polarity i.e. they are antiparrallel. 2. The regular repeating sugar phosphate b...
Nucular war
Nucular war NUCLEAR WARFARE Nuclear Weapons are explosive devices made to release nuclear energy. The first atomic bomb, which was tested on July 16, 1945, at Alamogordo, New Mexico, represented a completely new type of artificial explosive. All explosives get their power from the rapid burning or decomposition of some chemical compound. Such chemical processes release only the energy of the outermost electrons in the atom. Nuclear explosives involve energy sources within the core, or ...