|
Papers on Science and Nature
Bioremediation Of Explosives In Contaminated Soil
Number of words: 2522 | Number of pages: 10.... to save 2.6 million dollars compared with incinerating the contaminated soils. In addition to saving money, composting will also avoid the need for burning fossil fuels and will produce an end product usable for backfilling, landscaping, or erosion control.
Introduction
Whether people know it or not explosives, such as tnt, are a very important part of their lives. Since World War I, munitions have been manufactured in the United States using a variety of energetic materials, including propellants, explosives, and pyrotechnic (PEP) materials. (Noyes, 1996) Many manufacturing sites contain explosives. As a result they have c .....
Get This Essay
|
|
Chemical Warfare
Number of words: 385 | Number of pages: 2.... 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 ge .....
Get This Essay
|
|
The Platypus
Number of words: 961 | Number of pages: 4.... burrow is used by both sexes as a place to rest, sleep and eat. Burrows have a problem with maintaining a flow of air through them. If a platypus stays in a burrow for too long it will begin to use up its supply of oxygen. The nesting burrow has an entrance above water level to increase oxygen supply, whereas the dwelling burrows are located below water level.
has a bill like a duck, and a tail like a beaver. Some believe it is a cross between a duck, beaver, and fish. lays eggs and suckles its young. Roughly half the size of a household cat, the adult male’s average length is about 50cm and can weigh up to 2.4 kg .....
Get This Essay
|
|
How Does Light Affect The Rate Of Photosynthesis?
Number of words: 1845 | Number of pages: 7.... what problems we might face when we did the main experiment and gave us the idea how to do it.
The pondweed should create photosynthesis by the following equation: -
6CO2 + 6H2O 6C6H12O6+ 6O2
Photosynthesis occurs when plants take in Carbon Dioxide from the surrounding air in its leaves and water from the nearby soil in its roots. The leaves then take light energy from the Sun, which is absorbed in the chlorophyll in the cells and passes it along for it to be used in photosynthesis. Glucose is produced and is converted into Starch to be stored. Oxygen is produced from the water and it is a waste product so it is released i .....
Get This Essay
|
|
Vertebrate Adaptions For Terrestrial Life
Number of words: 624 | Number of pages: 3.... mouth, passes through the trachea,
then branches off at the two bronchi, and goes through many branching passages
called bronchioles, which end in alveoli. Alveoli are sack-like structures where
the circulatory system meets the respiratory system.
Since terrestrial vertebrates do not live in water, they need to develop
a means of conserving water. One way we do this is through our excretions.
Nitrogen forms a major waste product in animals. When amino acids and nucleic
acids are broken down, they release toxic ammonia (NH3). To rid the body of this
toxin, several mechanisms have evolved, each appropriate to the habitat or
surv .....
Get This Essay
|
|
Consciousness As Determined Th
Number of words: 1041 | Number of pages: 4.... as a form of relationship or act of the mind toward objects in nature, and a view that consciousness was a continuous field or stream of essentially mental "sense data."
The method believed by most early writers in determining consciousness was introspection—looking within one’s own mind to discover the laws of it’s operation. This belief was limited when it was apparent when observationalists could not agree on observations. Obviously due to the differences in one’s own idea of introspection and the underlying views they possessed.
The failure of introspection to reveal consistent laws led to the refection of all men .....
Get This Essay
|
|
Is There Evidence That Homosexuality Is Biologically Determined?
Number of words: 884 | Number of pages: 4.... there are a few flaws to their interpretation of the
results. Among them are stated in the article. A replication of the
experiment is necessary, the separation of the particular gene has not been
achieved, and the importance of the region has not yet been determined.
Moreover, the supposed gene that influences homosexuality suggests that it
acts indirectly on the choice of their sexual orientation. LeVay and Hamer
mention their perspective on the cause of homosexuality that was derived
from extensive experiments.
Throughout the article, “Evidence for Biological Influence in Male
Homosexuality,” LeVay and Hamer succeed i .....
Get This Essay
|
|
Electronic Commerce
Number of words: 874 | Number of pages: 4.... are looking for only to be told by the rude, pushy sales person that it is out of stock. After they get pushed into something other than what they came for they will wait in a line similar to that of Space Mountain at Disney World. Finally they will head for home after spending about an average of 2.5 hours (Sparkman 24). On the other hand, shopping on the Internet is takes no time at all. The consumer would log on to their Internet service provider and point their browser to one of many places depending on their needs. They can read about the product features and benefits, see how it compared to other models in similar price .....
Get This Essay
|
|
Flooding
Number of words: 3318 | Number of pages: 13.... back the sea and other public officials and some scientists who are skeptical about erosion-fighting programs. There were those who believed people should not be allowed to rebuild in hazardous areas and those who would not forbid them to build as long as they did not ask for recompense when they got into trouble. One group has felt property owners should not be compensated if they are forbidden to rebuild, and others say it is unconstitutional to take property without compensation.
The November 1997 meeting helped to demonstrate that the issue of sea level rise is more than a retreat slogan; it is an important environmenta .....
Get This Essay
|
|
The Greenhouse Effect
Number of words: 424 | Number of pages: 2.... CFCs are suspected of breaking down ozone
particles that shield us from the sun's ultraviolet rays. Too many
ultraviolet rays can cause cataracts and skin cancer. A hole in the ozone
has been discovered over Antarctic the size of the United States. The hole
is actually where the ozone has been depleted or thinned by the CFCs. The
use of aerosol cans accounts for most of the release of CFCs. This
resulted in the United Stated as well as other countries outlawing the use
of these harmful chemicals in aerosol cans. Experts think that CFCs can
stay in the atmosphere at least three hundred years.
In order to slow the gr .....
Get This Essay
|
|
|