The Physics Of Scuba Diving: Swimming With The Fish
.... safety precautions, and
the best places to dive. This paper is designed to help give a general
understanding of the sport and the importance that physics plays in it. Self-
contained Underwater Breathing Apparatus, or SCUBA for short, is a hell of a lot
of fun. However, there is considerably more to Diving than just putting on a
wetsuit and strapping some compressed air onto ones back. As I quickly learned,
diving safely requires quite a bit more in terms of time, effort, and
preparation. When one goes underwater, a diver is introduced to a new and
unfamiliar world, where many dangers exist, but can be avoided with proper
lesson .....
|
|
Fungi: The Great Decomposers
.... .....
|
|
Steps Towards An Ecosociety: Dealing With Air Pollution
.... environmental impact while
creating minimal economic distortions.
For the purpose of this essay, pollution shall be identified as follows
"...the deliberate or accidental introduction to the environment of contaminants,
in the form of either wastes or products " (Bryner, 10). This essay will deal
with the problem of air pollution. Air pollutants come from heavy industry,
fumes from automobiles, jet planes and the like. When speaking of the automobile
alone "...each gallon of gas burned releases 22 pounds of carbon dioxide in the
atmosphere...the car is the single largest contributor to global warming "
(Rifkin 179). Alt .....
|
|
Genetic Diversity In Agriculture
.... plant forms and related species of crop plants. Agricultural process,
as a result of new breeding programs, has reduced rather than increased crop
variability as improved cultivars, or varieties, are planted in wider and wider
areas and old cultivars, which may contain valuable genes, are lost. Crop
failures, which result in a smaller gene pool, have led to an increased
awareness of the need to preserve genetic diversity in plants. Efforts are
under way to increase collections of plant materials in various forms. Usually
these are preserved as seeds, but living plants, pollen, and cell cultures are
also used. In most ge .....
|
|
Genetic Engineering
.... for certain inherited diseases.
Identified genes could be repaired, resulting in the irradiation of inherited
diseases, such as cancer. Just last year, the locations of genes for several
diseases were confirmed and may soon be correctable. Secondly, research in
genetics has brought about a new medical field, genetic counseling. Couples
planning to have children can visit a genetic counselor and identify what
medical difficulties their child may have. With continued research in genetics,
couples will have the opportunity to become aware of a greater number of
medical conditions that may affect their child and can make the pr .....
|
|
Genetic Engineering, History And Future: Altering The Face Of Science
.... genetic engineering, and embracing its
possibilities for society, is to obtain a rough knowledge base of its history
and method. The basis for altering the evolutionary process is dependant on the
understanding of how individuals pass on characteristics to their offspring.
Genetics achieved its first foothold on the secrets of nature's evolutionary
process when an Austrian monk named Gregor Mendel developed the first "laws of
heredity." Using these laws, scientists studied the characteristics of
organisms for most of the next one hundred years following Mendel's discovery.
These early studies concluded that each orga .....
|
|
Genetic Observations Through The Studies Of Hybrid Corn, Single Gene Human Traits, And Fruit Flies
.... hybrid offspring is the F1 generation,
the first filial. The F2 generation is the second filial and is the self-
pollination of the F1 hybrids. It was predominantly his research on the F2
generation that led to Mendel’s Law of Segregation and Law of Independent
Assortment (Campbell, 1996).
Mendel’s Law of Segregation states that alleles sort into separate
gametes. He formed this through performing monohybrid crosses. The F2
generation will have a 3:1 phenotypic ratio. By considering more than one trait
Mendel formed his Law of Independent Assortment. He questioned whether traits
were inherited independently or dependent .....
|
|
Genetic Engineering
.... by more economical methods; - new kinds of
antibiotics not otherwise available; - plants with resistance to some pesticides,
insects and diseases; - plants with improved nutritional qualities to enhance
livestock productivity.
Methods:
- Manipulation of the Gene pool, which is related to Hybridization which is the
breeding of species but the species are not the same but they are related.
- Chain reaction is the production of many identical copies of a particular DNA
fragment.
- The utility of cloning is important, it provides the ability to determine the
genetic organization of particular regions or whole genome. However, .....
|
|
Transitions Of Reptiles To Mammals
.... However, usually there are still gaps between
each of the groups. Sometimes the individual specimens are not thought to be
directly ancestral to the next-youngest fossils (e.g. they may be "cousins"" or
"uncles" rather than "parents"). However they are assumed to be closely related
to the actual ancestor, since the have similar intermediate characteristics.
Where Does It All Begin ?
Mammals were derived during the Triassic Period ((from 245 to 208
million years ago) It began with relatively warm and wet conditions, but as it
progressed conditions became increasingly hot and dry.) from members of the
reptilian order Therapsi .....
|
|
Doublespeak: Nuclear Power Plants
.... a major accident hasn't happened, or
the accident was a normal event or minor incident.
In 1979 a valve in the Three Mile Island stuck open, allowing coolant,
an important part of the plant, to escape from the reactor. An installed
emergency system did its job and supplied the reactor with necessary coolant,
but the system was shot off for a few hours due to employee error. Corrective
action was eventually taken, and only a partial meltdown occurred. The plant's
containment building was able to hold most of the radioactive products from
entering the local environment. Only a small amount of activity escaped, that
activity was c .....
|
|
Drugs: Glossary And Definitions
.... The
diameter of droplets in a microemulsion may be in the range of 100 A to 1000 A.
Microemulsion may be formed spontaneously by agitating the oil and water phases
with carefully selected surfactants. The type of emulsion produced depends upon
the properties of the oil and surfactants utilized.
Ointment:
Semisolid preparations intended for topical application. Most ointments are
applied to the skin, although they may also be administered ophtalmically,
nasally, aurally, rectally, or vaginally. With a few exceptions, ointments are
applied for their local effect on the tissue membrane rather than for systematic
effects.
Prof .....
|
|
The Future Of NASA
.... pumping blood. Pens that write upside-down are used in space, where there
is no gravity and writing with pens would otherwise be impossible. They are
convenient tools on Earth when we are trying to write on vertical surfaces. A
zero-gravity training system is used to help astronauts become more comfortable
with the conditions in space. It is used in places such as Sportsland, for kids
to twirl around in.
In the future, telephones with picture screens, much like those used to
see astronauts in space with, will become common on Earth. Rooms with no
gravity may become a part of amusement parks. More solar-powered energy source .....
|
|
|
