EssayZap  
Enter Topic  

» Get Science and Nature Papers

Klinefelter Syndrome

... is caused by a chromosome variation involving the sex chromosomes. The person with is a male who, because of this chromosome variation, has a hormone imbalance. While Dr. Harry Klinefelter accurately described this condition in 1942, it was not until 1956 that other researchers reported that many boys with this description had 47 chromosomes in each cell of their bodies instead of the usual number of 46. This extra sex (X) chromosome causes the distinctive make-up of these boys. All men have one X chromosome and one Y chromosome, but ...

Number of words: 912 | Number of pages: 4

Nuclear / Particle Physics Effects Of The Atomic Bombs On Hiroshima And Nagasaki

... An atomic bomb is any weapon that gets its destructive power from an atom. This power comes when the matter inside of the atoms is transformed into energy. The process by which this is done is known as fission. The only two atoms suitable for fissioning are the uranium isotope U-235 and the plutonium isotope Pu-239 (Outlaw Labs). Fission occurs when a neutron, a subatomic particle with no electrical charge, strikes the nucleus of one of these isotopes and causes it to split apart. When the nucleus is split, a large amount of energy is produce ...

Number of words: 2095 | Number of pages: 8

Animal Research

... In the next few paragraphs, both sides of the argument will be expressed by the supporters. A well known scientist named Neal D. Barnard said," The use of animals for research and testing is only one of many investigative techniques available. We believe that although animal experiments are sometimes intellectually seductive, they are poorly suited to addressing the urgent health problems of our era, such as heart disease, cancer, stroke, AIDS and birth defects." He goes on further to say that animal experiments can not only mislead res ...

Number of words: 1139 | Number of pages: 5

Euthanasia And Suicide

... educational level, and marital status that influences how a person views the issue. I will also discuss the definitions of death. I will discuss the ethical and moral aspects of the problem of euthanasia. I will try to use Emile Durkheim’s social integration theory to explain the causes of active euthanasia, and suicide in general. I will also use Charles Tittle’s defiance category of deviance, which represents escape or withdrawal from active participation to social relationships or normative obligations to society. I want to int ...

Number of words: 10462 | Number of pages: 39

Acid Rain

... rain that falls, for that rain is naturally slightly acidic. It is caused by today's industry. When products are manufactured many chemicals are used to create it. However because of the difficulty and cost of properly disposing of these products they are often emitted into the atmosphere with little or no treatment. The term was first considered to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time ...

Number of words: 1942 | Number of pages: 8

Internet Concepts

... Internet interna diseñada para ser usada dentro de una compañía, universidad u organización. Lo que distingue a una intranet de la gratuitamente accesible Internet, es que las intranets son privadas. Confidencial Hasta hace muy poco tiempo, las corporaciones confiaban en equipos y programas propietarios para la instalación de redes en sus computadoras, un proceso costoso y que lleva tiempo de realizar, convirtiéndose en mucho más difícil cuando las oficinas de la compañía se encuentran repartidas por todo del mundo. Incluso en las ...

Number of words: 2935 | Number of pages: 11

Photoperiodism

... them is the flowering of plants. The ability to respond to day length is linked to an inner, light-sensitive circadian rhythm. In the temperate zones, day lengths during the natural 24-hour cycle vary with the seasons. In winter and spring, the period of light lengthens; in summer and autumn, it shortens. Plants in these zones undergo alternate 12-hour phases of light sensitivity. During one 12-hour phase, decreasing exposure to light induces a short-day reaction. For example, deciduous trees under the influence of the shorter days of ...

Number of words: 260 | Number of pages: 1

Origins And Bibliography Of The Big Bang Theory

... Theory of Particle Physics: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ And God said, "Let there be an expanse between the waters to separate water from water." (Gen. 1:6) And God said, "Let the water under the sky be gathered to one place, and let dry ground appear." And it was so. (Gen. 1:9) - - - - Further reading: 1. John H. Schwartz, "Completing Einstein", SCIENCE 85, vol 6, pp 60-64, 1985. 2. Robert Palmer, "What's a Quark?", SCIENCE 85, VOL 6, pp 66-71, ...

Number of words: 3947 | Number of pages: 15

Mexican Grey Wolf

... Physically, cannabis is relatively harmless. Studies have observed interesting results, including that it causes structural changes in the brain, depresses male sperm counts, causes chromosome damage, lowers testosterone levels, and damages the lungs. Most of these claims, however, have been unreplicated in humans or have been contradicted by other work. This section will address each of these reported negative side-effects. Various studies have claimed that cannabis destroys brain cells. However, several other studies found no structural o ...

Number of words: 1467 | Number of pages: 6

How Various Mechanisms By Which Substances Cross The Cell Me

... concentration to an area of lower concentration. Concentration gradient causes the molecules to move from higher concentration to a lower concentration. The side of the membrane that has the higher concentration is said to have the concentration gradient. It drives diffusion because substances always move down their concentration gradient. The pressure gradient also plays a role in diffusion. Where this is a pressure gradient there is motion of molecules. The pressure gradient is a difference in pressure between two different po ...

Number of words: 886 | Number of pages: 4

The Autumn And The Fall Of Leaves

... tenderness, presides at the fall of leaves. There is no air, no breath at all. The leaves are so light that they sidle on their going downward, hesitating in that which is not void to them, and touching at last so intangible to the earth with which they are to merge, that the gesture is much gentler than a greeting, and even more discreet than a discreet touch. They make a little sound, less than the least of sounds. No bird at night in the marshes rustles so slightly, no men, though men are the most refined of living beings, put so passing ...

Number of words: 552 | Number of pages: 3

Healthcare And Coranare Heart Disease

... because of the high amount of overweight people in America, which span all economic groups. Exercise is another important factor. The more exercise people get the lower the risk of heart disease. Part of the reason for this is the fact that people that exercise tend to have more healthy lifestyles, which include lower levels of alcohol use and lower fat diets. My stepfather had coronary heart disease. He talked about it freely before he passed away. Over the course of 10 years he had two triple bypass surgeries. He believed he contracted the d ...

Number of words: 2728 | Number of pages: 10

Pages: 1 ... 70 71 72 73 74 75 76 77 78 79 80 next »