Science Essays

Aids 4
Aids 4 AIDS stands for Acquired Immune Deficiency Disease. It is caused by a virus. The disease originated somewhere in Africa about 30 years ago. There it first appeared as a mysterious ailment afflicting primarily heterosexuals of both sexes. It probably was spread primarily by female prostitutes there. AIDS has already become a crisis of staggering proportions in parts of Africa. In Zaire, it is estimated that over twenty percent of the adults currently carry the virus. That figure i...

Aids 5
Aids 5 AIDS Acquired immune deficiency syndrome, or AIDS, is a recently recognized disease. It is caused by infection with the human immunodeficiency virus (HIV). AIDS is a complicated illness that may involve several phases. It is caused by a virus that can be passed from person to person. AIDS impairs the human body's immune system--the system is responsible for warding off disease--and leaves the victim susceptible to various infections. AIDS was first conclu...

Aids is becoming so widespread
Aids is becoming so widespread Aids is becoming so widespread The disease called aids is becoming very widespread in the United States. The question is why. In the following paragraphs the answers to this question will be answered. Aids is the final, life-threatening stage of infection with human immuondeficiency virus (HIV). Aids stands for Acquired immunodeficiency virus syndrome. The name refers to the fact that HIV severely damages the patient's disease fighting immune s...

Air bag safety for the prevention of injury and death
Air bag safety for the prevention of injury and death According to statistics, motor vehicle accidents are the number one leading cause of unintentional injury-related deaths, making up close to 45% and more than quadrupling all other causes. Although these statistics can be overwhelming knowing that driving a motor vehicle on a daily basis comes with a lot of risk, an individuals chance of injury can be lowered by following basic rules of safety. The American Trauma Society believes that th...

Air pollution 2
Air pollution 2 Air Pollution Air, is the most essential element for all living organisms and yet, most humans play a big role on polluting this essential resource. Air pollution may not be as dangerous in its direct outcome as nuclear or water pollution can be, but in the long term it will have an tremendous effect on the environment and health of its organisms living in. Asthma, cancer, acid rain, and the disability to photosynthesize are only a few causes of air pollution.The atmosp...

Agent orange
Agent orange Agent Orange Agent Orange is a plant killer, which was used during the Vietnam War to destroy the massive amount of trees (Nguyen, 1). The destruction that occurred, however, is far more extensive than once believed. Complications in health occur much more frequently to those exposed to the chemical than those who managed to avoid contact (Nguyen, 2). The use of Agent Orange in the Vietnam War affected the American soldier�s health and genetics. Agent Orange is a 50:50...

Aggression As A Mental Disorder In Canines
Aggression As A Mental Disorder In Canines Aggression As A Mental Disorder In Canines People across the world keep dogs as pets. These dogs are usually a big part of their owners lives and often grow up to truly be, "man's best friend,". What, then, can be done for a dog with behavior problems? Through recent research it has been established that dogs, like many humans, do suffer from mental disorders. There is however, a variety of treatments available and a complete cure is often achiev...

Aids 2
Aids 2 Acquired Immune Deficiency Syndrome Acquired Immune Deficiency Syndrome (AIDS). What is it? What causes it and why? Can I get it? How can I prevent myself from getting it? All of these questions can be answered. The main problem besides having AIDS, is not being educated enough to know how and why people are dying all over the world. Aids is caused by a virus called the human immunodeficiency virus, or HIV. A virus is one of the smallest �germs� that cause diseases...

Aids 3
Aids 3 In 1918 the United States experienced one of the worst epidemics in its history. With 500,000 dead in a matter of 6 months, the Spanish influenza left its mark. With approximately 11.7 million dead worldwide, Acquired Immune Deficiency Syndrome(AIDS) is still leaving its mark. It is a pandemic the likes of which the world has always feared to see. The HIV virus comes in several varieties, yet they kill basically the same. Our understanding of this virus and how it works is es...

Aedes Aegypti
Aedes Aegypti Aedes Aegypti The mosquito that has attracted the most attention is the mosquito Aedes aegypti. It belongs to the family Culcidae, consisting of about 2,500 species (Encyclopedia Britanica 1999), along with other genera of mosquitoes such as Anopheles, Culex, Orthopodomyia, and the Toxorynchites, to name a few (Womack 1993, E.B. 1999). This mosquito has been known best for transmitting yellow fever and human dengue throughout the tropic and subtropic of the ...

Aedies Aegypti
Aedies Aegypti Aedes Aegypti The mosquito that has attracted the most attention is the mosquito Aedes aegypti. It belongs to the family Culcidae, consisting of about 2,500 species (Encyclopedia Britanica 1999), along with other genera of mosquitoes such as Anopheles, Culex, Orthopodomyia, and the Toxorynchites, to name a few (Womack 1993, E.B. 1999). This mosquito has been known best for transmitting yellow fever and human dengue throughout the tropic and subtropic of the...

Afluenza
Afluenza Causes & Cures In this essay I plan to analyze a dangerous disease that is infecting people through the U.S. This disease is called affluenza it is very contagious and once infected with the disease it is difficult to unseat. Affluenza us characterized as an unhealthy relationship with money, swollen expectations and trying to keep up with the Joneses. Affluenza creates stress, bankruptcies, and causes problems in relationships. Although, there are some people who have a di...

After the atomic bomb
After the atomic bomb After the Atomic Bomb Introduction The development and usage of the first atomic bombs has caused a change in military, political, and public functionality of the world today. The bombings of Hiroshima and Nagasaki revolutionized warfare by killing large masses of civilian population with a single strike. The bombs� effects from the blast, extreme heat, and radiation left an estimated 140,000 people dead. The bombs created a temporary resolution that lead to an...

Add
Add Attention Deficit Disorder Attention deficit disorder is a condition characterized by the attention span that is less than expected for the age of the person. There is often age inappropirate hyperactivity and impulsivness. Attention deficit disorder is broken down in three sub catergories. Attention disorder dificit / hyperacity disorder: combined type, predominate inattentive and predominatly hyperactive or impulsive. The cause of the disorder is unknown. Some contributing factors...

Addition of vectors
Addition of vectors I. Introduction A vector is an arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity. Vectors are useful in combining velocities that are not parallel. The sum of two or more component vectors is called a resultant. When the vectors are not at right angles to each other, the resultant is found by constructing a parallelogram. The parallelogram is constructed with the two vectors as sides. The resulta...

Adolescent Depression The Under Acknowledged Disease
Adolescent Depression: The Under Acknowledged Disease Adolescent Depression: The Under Acknowledged Disease Psychology Depression is a disease that afflicts the human psyche in such a way that the afflicted tends to act and react abnormally toward others and themselves. Therefore it comes to no surprise to discover that adolescent depression is strongly linked to teen suicide. Adolescent suicide is now responsible for more deaths in youths aged 15 to 19 than cardiovascular diseas...

Adrenal glands
Adrenal glands Adrenal Gland Bircan Dogan 9D Task 1 My assignment is about the adrenal gland. The adrenal gland is a compound organ situated on the top of each kidney. It consists of an outer cortex and an inner medulla. 25mm wide, 50mm long, 5mm thick Diagram of the adrenal glands The adrenal gland releases the hormones adrenaline (epinephrine), noradrenaline (norepinephrine), steroid hormones and others, which are released into the bloo...

Acupuncture 2
Acupuncture 2 Acupuncture is a Chinese medical practice that treats illness and provides local anesthesia by the insertion of needles at predetermined sites of the body. Acupuncture may also follow many other forms. The word acupuncture comes from the Latin word acus, meaning needle, and pungere, meaning puncture. The Chinese call acupuncture Chen Chiu. On doing my research over acupuncture I used many different sources. I got most of my information from the Internet. I...

Acupuncture
Acupuncture Acupuncture Alternative medicine, long dismissed by mainstream doctors, is getting a second look as many people in the United States have turned to acupuncture to treat a variety of problems. Proponents of acupuncture have accumulated many statistics and surveys in favor of this ancient method. Even though, many medical professionals still question its validity due to the discovery of adverse effects of acupuncture and problems in researching alternative medicines. Acupun...

Adamantane
Adamantane The unique nature of diamond is heavily dependent upon its composition, crystal structure, and mechanical, thermal, and electromagnetic properties.1 Of those dependencies, composition exacts the most influence over the characteristics. Crystal structure is the repeating pattern of diamond�s composition, and each of the properties are the result of molecular interaction which is determined by composition. Therefore, composition is paramount in the determination of the qualities...

Adaptation syndrome
Adaptation syndrome What Is General Adaptation Syndrome (GAS) General Adaptation Syndrome is a theory formulated in 1936 by Dr. Hans Seyle, a celebrated figure in the field of stress research. Gas depicts the process of prolonged exposure to stress by separating behaviors into 3 stages. The Alarm Reaction, Resistance and Exhaustion Stage. This behavioral model is such a valuable tool in the study of stress research because it explains both the physiological and psychological effects o...

Adaptions in ectothermic and endothermic animals to extreme
Adaptions in ectothermic and endothermic animals to extreme Adaptions in Ectothermic and Endothermic animals to extreme climates First of all we need to understand what ectothermic and endothermic animals are. Animals differ in their abilities to regulate body temperature (thermoregulation). We sometimes use the terms "cold-blooded" or "warm-blooded." Most reptiles feel cold to the touch, while mammals and birds often feel warm. Somewhat more precise descriptions can be made by ...

Acid rain scourge from the skies
Acid rain: scourge from the skies Acid Rain: Scourge from the Skies �North Americans have been smelting ore and burning fossil fuels for generations. In the past, the gases went up ordinary chimneys or small smoke stacks, to descend upon near by areas and pollute them,� states author, Robert Collins. Almost everyone knows what acid rain is and has a vague idea of the consequences that exist as a cause of it. Most people however do not realize the severity of acid rain. The essay ...

Acne
Acne Acne is a very common skin disease. It can come in the form of blackheads, whiteheads, red spots and even boils (nodules or cysts). Although anyone can have acne, the majority of the cases are found in teenagers. Most of the Acne problems are found on the face, chest, upper back, and shoulders. These regions of the body are most common because they have large quantities of pilosebaceous follicles, which are huge oil-producing structures (Facts 1). The cause for Acne has not y...

Acquired immune deficiency syndrome
Acquired immune deficiency syndrome Acquired Immune Deficiency Syndrome Acquired Immune Deficiency Syndrome (AIDS). What is it? What causes it and why? Can I get it? How can I prevent myself from getting it? All of these questions can be answered. The main problem besides having AIDS, is not being educated enough to know how and why people are dying all over the world. Aids is caused by a virus called the human immunodeficiency virus, or HIV. A virus is one of the smallest ...