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» Science Essays and Papers
Marijuana 2
<view this essay>.... three distinct species of cannabis: Cannabis sativa, Cannabis indica, and Cannabis ruderalis, though there is some argument as to whether these should be considered varieties rather than species. Most recreationally used cannabis is the result of interbreeding between these three types. The term 'hemp' is generally used to describe low-thc varieties of cannabis, which are grown for industrial uses.
The strength of cannabis varies greatly from one variety to another. Some, known as 'one-hit-shit', requires only a single lung-full to reach full effects while other varieties require many hits to achieve the same effects. Additionally, the amount that one indivi .....
Number of words: 863 | Number of pages: 4 |
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Alcohol 2
<view this essay>.... alcohol has been practiced in all parts of the world for thousands of years. The first alcoholic beverages were fermented. Scenes showing fermentation appear on pottery made in Mesopotamia as early as 4200 B.C. Mankind early discovered that drinking the fermented juices of certain fruits, berries, and grain produced an extremely pleasant effect. Among primitive peoples, alcoholic drinks increased the excitement of tribal festivals. In more civilized nations, beers and wines in the daily diet were believed beneficial to health.
During the 1800’s, a movement began in the United States to prohibit the manufacture and sale of alcoholic beverages. A consti .....
Number of words: 390 | Number of pages: 2 |
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CHEMICAL REACTIONS
<view this essay>.... made up of phlogiston and ash, because only ash is left after combustion. His ideas soon brought speculations of doubt. When metal is burned, its ash has a greater mass than the original substance. Stahl tried to cover himself by saying that phlogiston will take away from a substance's mass or that it had a negative mass, which weren't relevant to his original theories.
In the Eighteenth Century Antoine-Laurent Lavoisier, in France, discovered an important detail in the understanding of the chemical reaction combustion of oxygen. He said that combustion was a chemical reaction involving oxygen and another combustible substance, such as wood.
John Dalton, in .....
Number of words: 874 | Number of pages: 4 |
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Yeast
<view this essay>.... rate. They reproduce by a process called fission which is also referred to as budding. During budding the cell wall swells in order to create a new bud. This newly created bud then breaks off from the original cell to become an independent cell.
is most commonly known to reproduce asexually or reproduce self-fertile. Some produce sexually, but that is only a very minuet number. The most reproduction is created in substances containing much sugar. For some reason or another, this appeals most to the , causing it to grow at a rapid rate.
Just like any other organism, in order for to survive they need to have a significant amount of nutrit .....
Number of words: 657 | Number of pages: 3 |
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Turner Syndrome
<view this essay>.... of the syndrome. It was not until 1959,
that it became clear the syndrome was due to lack of sex chromosome
material. Turner's Syndrome is a rare chromosomal disorder that affects
one in approximately 2,500 females. Females normally have two X-
chromosomes. However, in those with Turner's Syndrome, one X chromosome is
absent or is damaged.
OTHER NAMES Depending on the doctor, Turner's Syndrome may be diagnosed
with one of the following alternative names: 45 - X Syndrome, Bonnevie-
Ulrich Syndrome, Chromosome X, Monosomy X, Morgagni-Turner-Albright
Syndrome, Ovarian Dwarfism, Turner Type, among others.
SYNDROME CHARACTERISTICS A reduced growth in height is .....
Number of words: 1105 | Number of pages: 5 |
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Galileo
<view this essay>.... to succeed. There were many
differences in the worlds of these two great scientists that lead to the
reaction to their respective scientific hypothesize. It was not their beliefs
alone that led to their peer's views it was also the way each of them conducted
themselves. Galileo worked his way to become a respected scientist by most of
the intellectual community but he was also despised by many because of his
background and because of his attitude towards others. Darwin was well
respected by the intellectual community, but the difference was the way they
conducted themselves when they were dealing with their hypothesizes.
Galileo's Hypothesis
Galileo w .....
Number of words: 1785 | Number of pages: 7 |
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Introns And Exons
<view this essay>.... go several stages of modification.
At first, when the mRNA is produced, a cap is added enzymaticully to the
5¹ end of the RNA by linking a 7-methylguanosine residue by a triphosphate bond
this is called the G-cap. The G-cap is necessary for translation. The subunit
of the ribosome recognizes the G-cap and then finds the initiation codon to
start translation. As the mRNA comes finishes transcription, the Poly A tail is
added to the 3¹ end. As the two ends are placed the mRNA becomes pre-mRNA.
The pre-mRNA consists of splicing and non-coding regions. pre-mRNA
molecules are much longer than the mRNA molecule needed to code for its protein.
The regions th .....
Number of words: 653 | Number of pages: 3 |
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Green Fluorescent Protein Purification
<view this essay>.... to delocalize charge. In emitting light, the GFP fluorophore undergoes a cycle in which it absorbs a photon, deprotonates to form a phenolate which then emits a photon (at 509 nm) and gets protonated again so the fluorophore returns to its original state. This cycle allows the fluorophore to reliably emit a high yield of light with no outside influence other than the incoming photon. So GFP is basically a stable little (27-30 kD) green light bulb that can be tacked on to other proteins at either the N- or C-terminus without a distortion of its compact beta-can structure. Biochemists now frequently exploit GFP’s unique structural and physical characteristi .....
Number of words: 1280 | Number of pages: 5 |
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