|
|
|
|
Bioethics Of Cloning
... DNA, but differ in terms of their mitochondrial DNA, which is vitally important for the regulation of the cell. The media and the press ignored this fact, and thus claimed that Dolly and her “mother” were genetically identical, which sparked a fury of outcry all around the world. The technique of transferring a nucleus from a somatic cell into an egg cell of which the nucleus had been removed, called nuclear transplantation, is an extension of research that had been ongoing for over 40 years.
Up until now, scientists thought that adult cells could not be “reprogrammed” to behave like a fertilized egg and create an embryo, but the evidence obtained by Dolly’s succe ...
|
Attention Deficit Hyperactive Disorder
... as 1845 by the German physician Henrich Hoffman in his classic Der Struwelpeter (Slovenly Peter), a collection of humorous moral tales for children. The heroes were taken from his observations of children. In 1902, Dr. G. F. Still, described the behavior of a group of hyperactive children. He knew of no medical reasons for their behavior and made no mention of their educational needs or social skills. He said that part of the problem with ADHD children was "deficient training in the home." In 1923, researcher, F. G. Ebaugh, was one of the first to publish a professional paper recognizing ADHD as a long-term problem requiring cooperation and intervent ...
|
Autism 2
... brain. Significant abnormalities include differences in the cerebellum and in the size and number of Purkinje cells within the brain. Sometimes there is a pattern that exists within families from generation to generation. This indicates the possibility that autism is genetically related. However, no gene has been found.
Every person with autism is different and there is no set type or typical person with autism. This is because autism is a spectrum disorder, meaning that symptoms and characteristics of the disorder can present themselves in a variety of ways, from mild to severe. Usually children with autism have deficiencies in both verbal and non-verbal co ...
|
Bioremediation Of Explosives In Contaminated Soil
... When combined with more conventional compost ingredients such as manures, sawdust, straw, and fruit and vegetable processing wastes, the explosives become broken down into harmless chemical forms. The Army is using composting to clean up munitions processing wastes at several of its ammunition plants, including ones in Louisiana, Wisconsin, and Oregon. At the Oregon site, composting is projected 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 ...
|
The EPA: Can It, Will It Save Our Environment?
... in the food
chain. The use of lead in gasoline was phased out in '73 which caused lead
levels to drop 98%. In '74 the agency required drinking water to be physically
and chemically treated. CFCs were banned in '78 and a nation-wide toxic waste
site cleanup program was developed in 1980. The EPA then evacuated Times Beach,
Montana for dangerous levels of dioxin in soil, which was then criticized for
its heavyhandedness and arrogance. Charges of mismanagement and undue political
influence caused the head of the EPA to resign in '83. "The deputy director
resigns because of charges of making a 'hit list' of employees to be hired,
fired, or promoted because of ...
|
Creation Or Evolution?
... believe in evolution.
Biblical creationists are also called literal creationists, because they interpret the two Genesis accounts of creation in the Bible literally and believe that the Bible is without error. They believe that the "day" mentioned in Genesis 1 signifies a normal 24 hour day. According to this creation the universe was established in six days. Biblical creationists interpret most sedimentary rocks as products of Noah's flood. The majority believes that the earth is under 10,000 years of age. Some believe 4004 BC was the year of creation.
The person who proposed the methods by which natural processes cause the evolution of the species was ...
|
Asthma 2
... that may reflect the tendency of the child to develop hypersensitivity reactions. The attacks usually become less frequent and less severe over the years and disappear in about half of all affected children before adulthood. In one form of asthma, called intrinsic asthma, however, the attacks become less frequent and less severe, but recovery between them is less complete. The bronchi in such patients become chronically narrowed, causing a progressive loss of capacity for physical exertion. The prevalence of asthma is only about 1 or 2 percent worldwide but varies greatly from country to country. In the United States, asthma affects about 6.9 percent of chil ...
|
Newton's Method: A Computer Project
... be made.
Although Newton's Method works to find roots for many functions, it does
have its disadvantages. The root sometimes cannot be found by using Newton's
Method. The reason it sometimes cannot be found is because when the function is
equal to zero, there is no slope to the tangent line.
As seen in experimentation's, it is important to select an initial guess
close to the root because some functions have multiple roots. Failure to choose
an initial value that is close to the root could result in finding a the wrong
root or wasting a lot of time doing multiple iterations while getting close to
the actual root.
On some occasions, the program cannot find a ...
|
Lift, Weight, Thrust And Drag
... flight, when weight and lift are equal, an airplane is in a state of equilibrium. If the other aerodynamic factors remain constant, that airplane neither gains nor loses altitude. When an airplane is stationary on the ramp, it is also in equilibrium, but the aerodynamic forces are not a factor. In calm wind conditions, the atmosphere exerts equal pressure on the upper and lower surfaces of the wing. Movement of air about the airplane, particularly the wing, is necessary before the aerodynamic force of lift becomes effective. During flight, however, pressures on the upper and lower
surfaces of the wing are not the same. Although several factors contribute to this ...
|
What Is A Plant?
... have limited powers of movement. So from this you can conclude that
the difference between plants and animals is vague, especially among the
more primitive forms.
Plant organs are organized into three kinds of organs: roots, stems,
and leaves. Roots anchor the plant into the ground and they also gather
minerals and water from the ground. Roots usually grow under ground and
downward. Roots have tiny “hairs” which increase the surface of the roots,
which results in more gathering of minerals and water. Stems are usually
above ground, grow upward, and usually have leaves. Plants that do not
have leaves generally use the stem as the photosynthetic surf ...
|
Browse:
« prev
137
138
139
140
141
more »
|
|
|