PAPER Topics

... during World War I. Some other chemical agents can cause temporary blindness or mental confusion. But people still can defend themselves against all of these chemical agents. For example, gas masks, other protective coverings for the body, and injections of antidotes are used as defenses against chemical agents. Chemical agents also have nonmilitary uses. For example, riot control agents, including tear gas, can be used to control rioting crowds. These agents just affect the eyes, nose, and throat. They can cause blinding tears and a lot of times, violent coughing. But the effects of the gas aren't too serious because they disappear within a few minutes, or even after a victim gets some fr ...

... distinguish between one's own cells and "non-self" cells. The second job is to eliminate the non- self cells. When a foreign object enters the body, several things happen. Blood stops flowing, the immunity system begins to eliminate unwanted microbes with phagocytic white blood cells. This defensive mechanism is possessed by all animals with an innate system of immunity. Innate cellular immunity is believed to be the earliest form of immunity. Another form of innate immunity is complement, composed of 30 different proteins of the blood. If these mechanisms do not work to defeat an invader, vertebrates rely on another response: acquired immunity. Acquired immunity is mainly dealt by specia ...

... marvelous powers, and it was thought that there resided within in the individualities of the various metals, that in it their various substances were incorporated. This black powder was mystically identified with the underworld form of the god Osiris, and consequently was credited with magical properties. Thus there grew up in Egypt the belief that magical powers existed in fluxes and alloys. Probably such a belief existed throughout Europe in connection with the bronze-working castes of its several races. Its was probably in the Byzantium of the fourth century, however, that alchemical science received embryonic form. There is little doubt that Egyptian tradition, filtering thro ...

... of a particle is increased with heat. The particles which have to have the activation energy are those particles which are moving, in the case of magnesium and hydrochloric acid, it is the hydrochloric acid particles which have to have the activation energy because they are the ones that are moving and bombarding the magnesium particles to produce magnesium chloride. The rate at which all reactions happen are different. An example of a fast reaction is an explosion, and an example of a slow reaction is rusting. In any reaction, reactants chemical reactions® products. We can measure reactions in two ways: 1) Continuous:- Start the experiment and watch it happen; you can use a com ...

... thinking, indecision, and recurrent thoughts of death and suicide. The manic moods are made up by elevated or irritable mood, increased energy, decreased need for sleep, poor judgment and insight, and often reckless or irresponsible behavior. Bipolar affective disorder affects one percent of the population (approximately three million people) in the United States. It is presented by both males and females. Bipolar disorder involves moods of mania and depression. These episodes may move around with real bad depressions characterized by a bad sadness, almost inability to move, hopelessness, and disturbances in appetite, sleep, deadly driving. Bipolar disorder is diagnosed if an episo ...

... called nitrogen fixation.Bacteria are good for recycling because they feed on dying material and convert it back into basic substances.Without decomposition the food chain would cease.Bacteria also helps in the breakdown on rocks which influences the movement of key elements,such as,sulfur,iron,phosphorus,and carbon,around the world.Bacteria are the main digesters of cellulose within cows and other animals.Bacteria are used in the making of dairy products.Without bacteria the dairy industry would not exist.Bacteria are also helpful in sewage treatment.These certain bacterias convert the organic materials of sewage into carbon dioxide,methane,and hydrogen gases.Bacteria is involved in n ...

... of having the train that takes us into the city is a commonly know option. Not always have people been able to choose public transportation as a method of getting to and from. Dating as far back as 1889 when the first method of public transportation was developed in Massachusetts. Before this the thought of having a bus or train run to the main areas of a community was absolutely unheard of. But in today’s society there are many people who depend of the train or bus to get to work or to school or wherever it is they are going. When exactly did public transportation change from a luxury to a comfortable part of society? We can not exactly put a date on it but as you look back ...

... society to agriculturists, they settled in communities. Homes built among the wild brush were perfect prey to wildfires. Initially, wildfires were put out immediately and people were barred from setting fires in open spaces. Due to the policy of fire suppression, only one percent of all wildfires escaped early control. The land was safe from fires temporarily, but this set the stage for catastrophe as the brush grew more dense. There have been more than 20 catastrophic wildfires in Los Angeles County since the beginning of organized fire protection. The first "big one" happened in December of 1927. The fire started in the La Crescenta Valley, climbed over the Verdugo Mountain r ...

... accomplishment. The ethical dilemma was not explored before hand, and this to me is the great tragedy of most scientific discovery, since I firmly believe each scientist is responsible for that which he creates. Djerassi does confront a few questions of ethics and morality after the fact. On page 61, in chapter 6, he reflects on the argument of the use of poor Mexican and Puertorrican women for preliminary experiments. Is this just another manifestation of exploitation of the poor? Djerassi says absolutely not. Yes, the poor our the initial guinea pigs for research but this is no different from what dentists, barbers, and young surgeons do. All of these groups use the poor to hon ...

... patients display their symptoms. Boys are more likely to have the disorder than girls. The symptoms of ADHD usually decrease with age, but those symptoms related with other similar disorders are said to increase with age. 30-50% of children with ADHD may display symptoms, although often times less severe, into adulthood. ADHD may be observed in children before the age of four, but it’s signs are often missed until the child begins school. ADHD is often accompanied by learning difficulties, excessive physical activity, impulsive actions, inattention and social inappropriateness. Many of the children affected by ADHD exhibit a low threshold for frustration, which predisposes ...