Science Essays
Dinosaurs 2
Dinosaurs 2 Just as most dinosaurs are believed to be wild and mean, most are. Unlike the wild and ferocious Tyrannosaurus Rex, the Velociraptor, is a smaller, agile dinosaur. The Brontosaurus can be found with the bigger, more gentle dinosaurs. The Tyrannosaurus Rex, Velociraptor, and Brontosaurus differ greatly in their body structure, diet, and discovery. The Tyrannosaurus Rex was a very large dinosaur. Measuring 50 feet long, the Tyrannosaurus stood over 20 feet tall. The head o...
Dioxins
Dioxins Dioxinas Que son - Familia a la que pertenecen - Estructura qu�mica Como se Dispersan Como se generan Como se miden Que efectos producen Conclusiones. Soluciones o ideas Introducci�n: Este trabajo pertenece al proyecto grupo cuatro en ciencias del Bachillerato Internacional (IB), en el que la idea es analizar un tema mirado desde el punto de vista de una o m�s ciencias al mismo tiempo. En el caso de este trabajo espec�ficamente en el �rea de la ...
Discovery
Discovery Discoveries reveal things that we often would prefer to keep hidden. Discuss the concept of �Discovery� and the effects it has on those who are involved. You must refer to your set text and supplementary material which you have studied in relation to this topic. The topic discovery involves the reviling of past things that were previously unknown. These truths can range from physical objects to self-awareness, from new knowledge to hidden memory. However, discovery can b...
Dietary fibre
Dietary fibre INTRODUCTORY FOOD SCIENCE AND TECHNOLOGY DIETARY FIBRE : SIGNIFICANT TO HUMAN HEALTH OR NOT? In scientific terms, dietary fibre is a mixture of components derived from plant cell wall material and non-structural polysaccharides, as well as non-starch polysaccharides added to foods. It includes non-digestible polysaccharides such as cellulose, hemi-celluloses, gums, pectins, mucilages and lignin. From a nutrition point of view, some authorities also include 'resistan...
Digestive disorders (liver)
Digestive disorders (liver) Digestive Disorders Amebic Dysentry is a disorder in which there is an accumulation of pus located in the liver. This is usually caused by an internal parasite or organism. When dealing with this liver disease there are a few symptoms to look out for. Jaundice, which is something that will make your skin and eyes go yellow is a symptom of Amebic Dysentry. Other symptoms to look out for are chills, a high fever, sweating, diarrhea, loss of appeti...
Digestive system
Digestive system Digestive System The human body uses various kinds of food for energy and growth. To be used, however, food must be changed into a form that can be carried through the bloodstream. The body's process of extracting useful nutrients from food is called digestion. The digestive system of humans and other higher animals is the group of organs that changes food--carbohydrates, fats, and proteins--into soluble products that can be used by the body. Both mechanical ac...
Digital television
Digital television Digital Television On November 1, 1998 computer companies, television makers, broadcasters, and program suppliers have made a transition from analog to digital television. When the FCC passed a law forcing the networks to change from an analog broadcast to a digital broadcast, all the above mentioned industries have been scrambling to get a jump on their competition. The picture and sound qualities of digital TV broadcasts are the best on Earth. However, at this ...
Diabetes 3
Diabetes 3 Diabetes Mellitus is a disorder in which blood levels of glucose are abnormally high because the body doesn�t release or use insulin adequately. Diabetes Mellitus affects many organs of the body. It affects the blood vessels because Atherosclerotic plaque builds up and blocks large or medium-sized arteries in the heart, brain, and legs. The walls of small blood vessels are damaged so that the vessels do not transfer oxygen normally and may leak. This can lead to poor circul...
Diabetes
Diabetes Nearly 16 million people in the United States--nearly one out of every 17 people--have diabetes. And about 1,800 new cases are diagnosed each day. Technically, this disease is known as "diabetes mellitus," diabetes from the Greek for excessive urination, a symptom the ancients noticed, and mellitus, from the Latin for honey--diabetic urine is filled with sugar and is sweet. There are three types of diabetes: type 1, type 2, and gestational diabetes. All of them are a little d...
Diamonds
Diamonds A Diamond is one of the two natural minerals that are produced from carbon. The other mineral is Graphite. Even though both of these minerals are produced from the same element ,carbon, they have totally different characteristics. One of the most obvious difference is that Diamond is hard and Graphite is soft. The Diamond is considered to be the most hardest substance found in nature. It scores a perfect ten in hardness. Because of its hardness a tiny Diamond is used as a cutting ...
Did duhem show that scientific theories can be neither true
Did duhem show that scientific theories can be neither true The question as to whether scientific theories can be shown to be true or false is a complex one. The answer depends on one's interpretation of the meaning of theory. To what does it refer? Is its role to reveal the nature of reality, or is it merely a human construct? In which case what do we mean by truth? Is it an accurate description of reality, or does it simply refer to a successful theory that produces accurate predictions? D...
Desktop videoconferencing
Desktop videoconferencing Desktop Videoconferencing is gaining acceptance as a key telecommunications technology in the work place all around the world. Desktop Videoconferencing makes communication far more effective when its impossible for people to meet in person. Not only do people get a feel of what takes place in a face to face meeting but they also get to hear what others are saying and their reactions as well when using Desktop Videoconferencing technology. And unlike a telephone c...
Development of charles darwin
Development of charles darwin In the development of any one person, the people who touch their lives, in and out, day after day, and the thoughts and feelings that they stirred are summed and that quantity represents a large portion of the individual. When looking at the development of someone with as great an impact as Charles Darwin, the people with whom he kept aqaintence shine right through. From the love and support of family, to the help and guidance of friends, Charles Darwin had it a...
Development of operating systems
Development of operating systems An operating system is the program that manages all the application programs in a computer system. This also includes managing the input and output devices, and assigning system resources. Operating systems evolved as the solution to the problems that were evident in early computer systems, and coincide with the changing computer systems. Three cycles are clear in the evolution of computers, the mainframe computers, minicomputers and microcomputers, and ea...
Diabetes 2
Diabetes 2 Diabetes Some people have a disease that requires them to take daily injections of insulin. This disease is called diabetes, and cannot be cured. But, what if a non functioning pancreatic islet cells could be made to produce insulin once again. That would cure diabetes. The possibility has set the diabetes world excited over the past few months--ever since researchers at McGill University in Canada and the Eastern Virginia Medical School (EVMS) successfully regenerated islet ...
Depression
Depression In today�s society, we are faced with or placed in many unpredictable and stressful situations. However, many of us manage to properly analyze the situations and maintain our sanity, experiencing only a mild form of depression, if any. Others may encounter similar situations and become mentally depressed. Some reasons for being depressed are normal, such as, a death of a family member, parents divorce, or loss of job; but, depending on how long you are depressed, as a result of...
Describe the main limitations suffered by those with chronic
Describe the main limitations suffered by those with chronic One of the major public health problems facing Australia today is Asthma. It is disturbing that there has been an apparent increase in its prevalence and severity, and increased rates of hospital admissions. (E.J.Comino, 1996) For the diagnosed patient, the degree to which he or she suffers is related to severity of the condition, compliance with recommendations by medical experts, the immediate environment and the effectiveness of...
Desert biome
Desert biome DESERT BIOME Any barren region that supports very little life may be called a desert. The cold expanses of Antarctica, extreme northern Asia, and Greenland are therefore true, but cold, deserts. Most commonly, however, the term desert is used for regions that are barren because they are arid, or dry. Arid deserts receive little precipitation and are characterized by specialized plants that tolerate drought conditions and salty soils, and by distinctive land features. Most d...
Depression 7
Depression 7 Depression is a psychiatric disorder characterized by feelings of worthlessness, guilt, sadness, helplessness, and hopelessness. It is different then normal sadness or grief from the loss of a loved one because it is persistent and severe. Clinical depression has many related symptoms trouble sleeping, eating disorders, withdrawal and inactivity, self-punishment, and loss of pleasure. People that are depressed do not like to do things they may usually like to. About one if four ...
Depression the sadness disease
Depression the sadness disease Depression: The Sadness Disease In our never-ending quest for happiness in our life, is some of the joy taken away? Have our thoughts for what we always want turned astray? Why has the quest for happiness left us more vulnerable and sad? Are we a society of melancholy people that are all looking for happiness and disappointed with what we find? Leaving us in a state of depression and unstableness. Turning us into not only a society of dismal people, b...
Depression
Depression..a deadly disease " 'A symptom of the bad times is that you think that they will never abate. You convince yourself that you are doomed forever to a state of half-life. You awake to a sighing gloom and an inordinate effort of will is required to leave your bed. You know that you should get up to arrest the feeling of despair, but the listlessness which is a characteristic of the condition holds you there, gazing upwards in static stare, musing over the endlessness of the day ahead...
Depression 2
Depression 2 One of the most common mental disorders in the world today affecting up to 340 million people worldwide is depression. Imagine the entire student body of Upper Darby High School infected with the exact same disease. Depression is a common but complex disorder diversely affecting a variety of people with a multitude of symptoms. The disorder may be brought into affect due to a large number of causes. What can be done? There are numerous manners in which to tre...
Depression 3
Depression 3 Clinical depression is one of many mental disorders affecting 1 in 10 Americans today. This disorder is characterized by ongoing feelings of sadness and despair which leads to anxiety, agitation, feelings of emptiness, and loss of self-worth. Following these initial symptoms are possible weight loss or gain, insomnia, lack of energy, unusual indecisiveness, and even suicidal thoughts or attempts. There are many possible causes of major depression; however, very often the dise...
Depression 4
Depression 4 Depression (psychology), mental illness in which a person experiences deep, unshakable sadness and diminished interest in nearly all activities. People also use the term depression to describe the temporary sadness, loneliness, or blues that everyone feels from time to time. In contrast to normal sadness, severe depression, also called major depression, can dramatically impair a person�s ability to function in social situations and at work. People with major depression often h...
Depression 5
Depression 5 According to the American Psychological Association over 17 million Americans have depression (Par. 1). Depression is triggered by many things; whatever the trigger, it is much more than a simple case of �the blues.� Depression is a serious illness that can take a terrible toll on victims and families if left untreated. With proper treatment the disease can be minimized or even eliminated. Everyone feels sad or blue sometimes. But when an upsetting event occurs, Feeling...