|
|
|
» Browse Science and Environment Term Papers
Properties Of Water
Number of Words: 1189 / Number of Pages: 5
... amount. This makes water much better for regulating the
temperatures of animals and the environment.
Water also has a very high heat of vaporization. Converting one gram of
cold water into ice requires 80 Calories of energy. Converting the same amount
of very hot water into steam requires 540. The high amounts of energy required
to change water from its liquid state make water tend to stay a fluid. The
process of freezing water involves slowing down the activity of the water
molecules until they contract and enter into a solid state. Once the ice is
cooled down to 4 degrees or less, the hydro ...
|
|
Role Of Government Intervention In Environmental Issues
Number of Words: 824 / Number of Pages: 3
... So we should focus on how we can minimize this and yet at the
same time have an efficient market system? Furthermore, we should also focus on
how we can accomplish this so that sustainable growth and development can take
place. So there is definitely a need for some form of government intervention
to enforce and monitor this. Reason being that there is always an element of
equality that has to be enforced, when dealing with cases such as this. For
instance, larger corporations may have an advantage over smaller corporation,
since they have stronger influence on politicians and lobbyists. So the
go ...
|
|
Mononucleosis
Number of Words: 1880 / Number of Pages: 7
... in colleges and schools, where the disease has been well studied, report that they see most patients in the fall and early spring. Epidemics do not occur, but doctors have reported clustering of cases. Transmission: EBV, the virus that causes most cases of , infects and reproduces in the salivary glands. It also infects white blood cells called B cells. Direct contact with virus-infected saliva, such as through kissing, can transmit the virus and result in . Someone with , however, does not need to be isolated. Household members or college roommates have only a slight risk of being infected unless ...
|
|
A Brief History Of Clocks: From Thales To Ptolemy
Number of Words: 4266 / Number of Pages: 16
... for measuring time—the anaphoric clock and the astrolabe. Although Ptolemy was familiar with both the anaphoric clock and the astrolabe, I believe that the development of the anaphoric clock preceded the development of the astrolabe.
The earliest example, in western culture, of a celestial sphere is attributed to the presocratic philosopher Thales. Unfortunately, little is known about Thales’ sphere beyond Cicero’s description in the De re publica:
For Gallus told us that the other kind of celestial globe,
which was solid and contained no hollow space, was a very
early invention, the first on ...
|
|
Knee Surgery
Number of Words: 712 / Number of Pages: 3
... the doctor elected to stitch my cartilage back together. Because of the intricacy of the operation, I was restricted to non-weight bearing activities for three weeks. If I wished to return to wrestling, the doctor stated that I would have to demonstrate a muscle strength in my injured knee equal to ninety percent of my good one. When informed of this requirement, I could barely bend my leg twenty degrees nor use it to lift a ten-pound weight.
One week after surgery and with the aid of crutches, I nervously entered the rehabilitation clinic. The physical therapist gingerly measured my quadricep ...
|
|
Hydrogen 2
Number of Words: 1155 / Number of Pages: 5
... of producing hydrogen is through chemical means. It is a scientific fact that every metal that is less noble than hydrogen will isplace hydrogen from water . Common materials used in this reaction is sodium or potassium . Sodium plus water will produce hydrogen , NaOH, and heat . Other
reactions include the "producer" reaction that was discovered in 1800 . It involves combining heat, carbon, and water. It then yields hydrogen an carbon monoxide .
Bacteria can also be a hydrogen producer. Bacteria and other microorganisms may
release hydrogen in the process of creating heavier hydrocarbons or oxy ...
|
|
AROMTHERAPY
Number of Words: 899 / Number of Pages: 4
... well-being. Although Aromatherapy is consider to be a new and alternative foram of medicine in the western world, however it has been practiced for thousands of years in the eastern world.
A lot of interest in Aromatherapy stems from its use as an 'alternative medicine' or even a 'complementary medicine'. It is certainly true that before pharmaceutical companies brought a vast array of modern drugs to the market, people had to make do with many 'home remedies' - often herbal remedies or extracts of plants. Flowers, buds, roots, bark, leaves etc. all played a part in the treatment of disease and sick ...
|
|
Cells
Number of Words: 358 / Number of Pages: 2
... which separates parts of the cell. Then
there is the Golgi apparatus which is used for sorting, storing, and secretion
for the cell. Next are lysosomes, which hydrolyze macromolecules. Then there
are centrioles that play a major role in cell division. And lastly there are
vacuoles which have a variety of storage functions.
The plant cell is similar in most ways. The only really big differences
between the plant cell and the animal cell are as follows. The first is the
outer membrane. The plant cell has a cell wall that highly acts as support to
the cell, where the animal cell has a more fl ...
|
|
Gene Therapy
Number of Words: 3603 / Number of Pages: 14
... gene, children have no way of converting deoxyadenosine (a waste product) into inosine. This leads to the rapid build-up of deoxyadenosine in the system, which becomes phosphorlyzed into a toxic triphosphate, which kills T-cells. The result is an almost complete failure of the immune system and early death.
Previous treatment options included bone marrow transplants, which worked well with matched donors. A major breakthrough occurred with the development of polyethylene glycol coated ADA (PEG-ADA). This treatment introduces coated ADA into the blood stream, although not into the cells. It re ...
|
|
Born Too Early
Number of Words: 739 / Number of Pages: 3
... aren’t equipped with the technology that is needed to keep the baby alive and the baby has to be transported to a bigger hospital, usually to a hospital in a metropolitan city in order to get the proper care. After the baby has been assessed for problems then it is watched closely for the next 48 hours. This is the most critical time for a baby . During this time the doctors can determine if the baby is going to have a long road ahead of them or if the baby is healthy and will pull through the whole thing with flying colors. Sometimes, they may seem healthy and are progressing well and then they co ...
|
|
|
