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Search results 2091 - 2100 of 4688 matching essays
- 2091: The Cause and Effects of Acid Mine Drainage
- ... To me, a very interesting way of treating acid mine drainage successfully and also high metal removal. The reason for this is that the plants that are in the wetland are anaerobic and therefore the rates of decomposition and mineralization of organic matter from the plants of the wetlands is slowed, and organic matter tends to accumulate on the surface of sediments. Wetland, therefore can gather and transform organic material and ...
- 2092: Involvement of K+ in Leaf Movements During Suntracking
- ... before, most studies investigating the mechanisms of leaf movement have been performed on nyctinastic plants. These plants respond to light and dark changes, not direction or intensity of a light stimulus. Therefore, it is of interest to learn whether the same principles can be applied to diheliotropic movement. Different inhibitors at varying concentrations will be injected individually into the pulvinus of C. pallida, and the suntracking ability of the plant will ...
- 2093: Flouridation
- ... walls of blood vessels to fight disease, but fluoride slows down white blood cells. They don't work as fast as they should, and this weakens the immune system. The following table shows the migration rates of white blood cells treated with different concentrations of fluoride. (Yiamouyiannis pg. 23) Another one of the most damaging health hazards caused by fluoride is fluoride poisoning. This does not consist of one symptom or ...
- 2094: Determination of An Unknown Amino Acid From Titration
- ... point the number of moles of titrant equals the number of moles of acid or base originally present (dependent on if the amino acid is in an acidic or basic salt form). Another point of interest on a titration curve is the half-equivalence point. The half-equivalence point corresponds to the point in which the concentration of weak acid is equal to the concentration of its conjugate base. The region ...
- 2095: Analytical Chemistry
- ... physical properties of molecules, atoms, and ions. Such instruments have been made possible by spectacular advances in electronics, including computer and microprocessor development. Instrumental measurements can sometimes be carried out without separating the constituents of interest from the rest of the sample, but often the instrumental measurement is the final step following separation of the samples's components, frequently by means of one or another type of chromatography. One of the ...
- 2096: Our Solar System at a Glance
- ... for the Mariner 4 Mars flyby. The Mariner 10 spacecraft sent to Venus and Mercury used components left over from the Mariner 9 Mars Orbiter program. In 1972, NASA launched Pioneer 10, a Jupiter spacecraft. Interest was shifting to four of the outer planets -- Jupiter, Saturn, Uranus and Neptune -- giant balls of dense gas quite different from the terrestrial worlds we had already surveyed. Four NASA spacecraft in all -- two Pioneers ...
- 2097: The Tragic Challenger Explosion
- ... the External Tank was severed or pulled away from the weakened hydrogen tank permitting the right solid rocket booster to rotate around the upper attachment strut. This rotation is indicated by divergent yaw and pitch rates between the left and right solid rocket boosters. At 73.124 seconds,. a circumferential white vapor pattern was observed blooming from the side of the External Tank bottom dome. This was the beginning of the ...
- 2098: Mimicry In Nature
- ... with all the features of a fat, juicy pink worm. The anglerfish lacks powerful teeth so it can't take a tight grip on its prey. Instead, it waits motionless until a small fish shows interest in the lure, and then wiggles the lure in front of the fish's mouth. When the small fish is just about to snap at the lure, the angler swallows violently, sucking the fish down ...
- 2099: Artificial Life
- ... dimensional images of plants. The significance of Lindenmeyer's contribution is evident in the fact that so-called "genetic algorithms" are now basic to research into a-life as well as many other areas of interest. Genetic algorithms, first described by computer scientist John Holland of the University of Michigan in the 1970s, are comparable to L-systems. A computer worker trying to answer some question about a-life sets up ...
- 2100: Alchemy
- ... Bacon and in Spain itself by Raymond Lully. Later, in French alchemy the most illustrious names are those of Flamel (b. ca. 1330), and Bernard Trevisan (b. ca. 1460) after which the center of of interest changes to Germany and in some measure to England, in which countries Paracelsus, Khunrath (ca. 1550), Maier (ca. 1568), Norton, Dalton, Charnock, and Fludd kept the alchemical flame burning brightly. It is surprising how little ...
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