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Essays on Science

Pesticides
Download This PaperWords: 558 - Pages: 3

... Insecticides are used by farmers who want to exterminate some of the many harmful insects that can carry disease. Insecticides are very widely used, not only on farms, but in residential areas in the form of products like Raid, and ant traps. are dangerous to our environment, but in most cases they help more than they hurt. For example, it is estimated that the food supply would reduce by forty to fifty percent without the use of on our crops. The FDA, EPA, and the Department of Agriculture try to ensure that the use of is necessary to the extent in which they actually are used by performing studies and proposing bills and laws to Congress. There is ...



Fluoride
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... The remineralization effect of fluoride is important because it reverses the early decay process as well as creating a tooth surface that is more resistant to decay. Community water fluoridation is the adjustment of the amount of the beneficial trace element fluoride found in water to provide for the proper protection of teeth. Fluoridation has been widely utilized in this country since 1945. It does not involve adding anything to the water that is not already there, since virtually all sources of drinking water in the United States contain some fluoride. Fluoridation is a form of nutritional supplementation that is not unlike the addition of vitamins to milk, ...



Iron Meteorites
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... three swords an almost wood grain effect to their blades. Since the iron in the swords was not pure they were quite difficult to make for the master swordsmith Kinimune Okayoshi. Forging it by folding it over and over did not work out very well. So the forging could only be carried out when the metal had gotten so hot it turned white. Although somewhat irrelevant to the short story about the Shooting Star Swords, meterites do play an important part in science to day, and help scientist decode the birth of earth, our sun, and even the galaxy in which we are in. Today whenever a meteorite is found it is closely strdied by teams of scientist, to see if it could de ...



Electrolytes
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... form non conducting solutions. A couple electrolytes conduct electricity as solids. These solid electrolytes have ions that can move and carry charges without solvents. There are two ways to be able to have ions that are able to conduct electricity, the dissociation of Ionic Compounds, and the Ionization of Polar Covalent Molecular Substances. The Dissociation of Ionic Compounds is where particles are ionically (electrically) bonded together. They already made out of cations and anions, but in their solid state the ions are locked into position in their crystal structure, and can’t move around. When the ionic compound is dissolved into water the water molecu ...



Internet The Advantages And Disadvantages
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... to your desktop. In the world of the of the Internet there exist a world blind to skin color and other physical appearances. The Internet while still young in age has grown rapidly, spreading to countries world wide and connecting 50 million users. With its popularity, it is incumbent upon our society to recognize how the Internet works and to be aware of its advantages as well as disadvantages. While seemingly high tech the Internet concept is rather simple. Computers speak to one another and send information. This is accomplished by sending and receiving electronic impulse, and then decoding them into a message. In order to communicate with one another t ...



Growth Dynamics Of E. Coli In Varying Concentrations Of Nutrient Broths, PH, And In The Presence Of An Antibiotic
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... made to determine the number of cells present after a given time. Then two graphs were plotted, Number of cells per unit volume versus Time in minutes and Log of the number of cells per unit volume versus Time growth curve. The final cell concentration for the control was 619,500 cells/mL. Four media, after calculations, produced fewer cells than that of the control, these were: Chloramphenicol producing 89,3 01 cells/ml; glucose producing 411,951 cells/mL; lactose producing 477,441 cells/mL and finally pH 6.0 producing 579,557cells/mL. The remaining four media, after calculations, produced cell counts greater than the control: 2X with 1,087,009 cells/mL; 0.5 ...



Genetic Engenering -4
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... they intended once in twenty times, making the procedure far to risky to preform on a human embryo" (Nash 2). Many times scientist have proved that they do indeed have the power to duplicate an animal, plant and human body parts so that they are exactly identical to each other. For example, in May of 1998, scientists successfully cloned a calf using a new cloning technology that could make it possible to create "designer" cattle. Also, in June of 1998, there was talk about having successfully cloned a mouse swept through the scientific community(Nash 3). These are just a few of many times scientists have cloned an animal. These are the many things science has b ...



Cellular Respiration
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... their way toward the mitochondria, two more molecules of NADH are formed. A carbon atom also breaks off and combines with two oxygen atoms to produce the waste product carbon dioxide. As a result of these reactions, each pyruvic acid molecule is transformed into a two-carbon compound called an acetyl group. The two acetyl groups combine with a molecule of coenzyme A each to form two acetyl coenzyme A molecules. These molecules are processed in a complex pathway called the Krebs cycle. As the Krebs cycle progresses through both pyruvic acid molecules, six molecules of NADH, two molecules of ATP, and additional carbon dioxide are all formed. FAD picks up a hy ...



The Physics Of A Crystal
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... is a polyhedron with six octagonal faced and eight triangular ones. Aside from the isometric system, there is also; a tetragonal, orthorhombic, monoclinic, triclinic and hexagonal system. Crystals may form when a solution of a substance evaporates. Crystals may also form when a vapor or molten substance solidifies. Allotropes are different forms of the same element. For Example, oxygen has two allotropes, normal oxygen and ozone. Pure carbon also has two allotropes, diamond and graphite. A crystal of diamond is in fact a single giant molecule in which every carbon atom is linked to four other, by four equal, strong bonds. These bonds are arranged tetrahedrally r ...



Evolution From A Molecular Perspective
Download This PaperWords: 3032 - Pages: 12

... stored in our genes was available to the public? Would insurance companies and employers base their selections on these traits? Also, with the total knowledge of every sequence of every amino acid chain in a person's genome, couldn't a laboratory perceivably reconstruct an exact copy of, or clone, that person? These are all issues that will have to be dealt with in the near future, but for now we need only concern ourselves with the objective observation of these proteins in our attempt to explain our ever mysterious origin. As humans, we are the first creatures to question exactly where we came from and how we got here. Some cling to religious creationism as ...




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