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Search results 381 - 390 of 1458 matching essays
- 381: Fermentation
- ... of Sciences in Lille, France. He was originally asked by a friend to investigate difficulties he was having manufacturing alcohol by the fermentation of beetroot. Often, instead of alcohol, the fermentations were resulting in lactic acid. At that time, fermentation leading to the production of wine, beer, and vinegar was believed to be a simple and straightforward breakdown of sugar to the desired molecules. It was believed that the chemical breakdown ... vinegar were having horrible times with quality control. Yields of alcohol might suddenly fall off; wine might unexpectedly grow ropy or sour or turn to vinegar; vinegar, when desired, might not be formed and lactic acid might appear in its place; or the quality and taste of beer might unexpectedly change. Pasteur went through with several experiments and immediately came up with clues to help him unravel the fermentation mystery. The first clue that he noticed was that when alcohol was fermented normally, the yeast cells were plump and budding. But when lactic acid would form instead of alcohol, small rod like microbes were always mixed with the yeast cells. The second clue uncovered during the analysis of the batches of alcohol showed that amyl alcohol and other ...
- 382: Finland
- ... s most important natural resource. Some three-fourths of the total land area is forested, with pine, spruce, and birch being the predominant species. "Government cultivation programs, among other measures, have prevented forest depletion; and acid rain, which has devastated forests in central Europe, has not had any serious consequences in Finland." Much land has been taken out of agricultural production, and most farms consist of smallholdings. "Finland has been self-supporting ...
- 383: Business And The Environment
- ... charted through periodic reports in a set five-year period. The objectives set by Merck were specific. The minimization of chemicals released into the atmosphere, in turn harming people, animals, the ozone layer, and causing acid rain and the greenhouse effect was one goal. Research to find new ways to minimize waste and conserve resources was a priority. Reduction of waste generation and self-sufficient waste treatment and disposal were another goal ...
- 384: Dragons
- ... This causes the temperature in the breath to drop to an average of – 75 degrees C. Anyone caught in the path of the breath without heavy heat protection was at least seriously injured or killed. Acid Breather: This type of dragon had a special organ that allowed it to create an excessive amount of a powerful acid which it also used to break down food. Whenever it pleased, it could spew the acid from its mouth (vomiting), and this would burn its opponent. There is a direct link between the breath and the food, if the dragon is starving, his breath weapon does not regenerate. Dragon Encounters: ...
- 385: Drugs And Teenagers
- ... factor to suicide. Using drugs may reduce inhibitions and impair judgement, suicide is a possibility. As one statistic illustrates 70% of all young people who attempted suicide used drugs. Illegal drugs, for example, weed, speed, acid, or ecstasy has always been a problem among the younger folks, the problems gets even more serious if it involves additive substances such as cocaine. The most common seen illegal drug around teens in BC ... and sweating. The tablet changes every week and counterfeits are always around, it is not addictive. It is illegal to buy, sell, produce or posses any amount of E. Another popular drug is LSD (Lysergic Acid Diethylamide), which is a little similar to E. It alters a person's perception of sights, sounds, and touch etc, a person that has taken LSD might see or hear things that don't exist. Known as "acid", this drug is extremely powerful, once teaspoon can contain up to 25'000 doses. Only 200 micrograms is needed for one trip. The danger of LSD is that the effect of LSD is extremely ...
- 386: The Transcontinental Railroad and Westward Expansion
- ... assertion that the Plains were a region of semi-aridity, or contended that the climate was changing for the better. They advanced various theories to explain the change. Plowing the sod was said to produce rain. The stringing of telegraph lines was said to also produce rain. A theory was developed that the noise of civilization, the clanging of the locomotives, etc., lead to the rain. These theories were even repeated by state officials. "The scientists of the federal government were not allowed to counteract such propaganda. In the reports of the Geological Survey, Major John Wesley Powell was obliged, ...
- 387: Nuclear Energy
- ... than coal burning plants in this respect. 1 tonne of coal used in coal burning plant produces 2.5 tonnes of carbon dioxide (which harms the environment in more ways than one), 45 kilograms of acid rain (coming from the plant's SO2 and NOx emissions) and 90 kilograms of ash. In comparison of emissions, nuclear plants are harmful as well, but are not harmful to this degree. One harmful by-product ...
- 388: Becoming A Soldier
- ... passage in my life. At first they took us to a very long trailer. It was brown and looked like it was going to collapse. The paint was coming off from the walls and the rain was coming down heavily on it. The floor was cracking when we walked on it, and it was cold. In the first station they took our fingerprints. The army does that in case they will ... appetite, and when I saw the food I felt nauseous, since it looked dry and tasteless. After the 30 minutes were up we stood outside like we were ordered, and we got wet from the rain, and we were shaking from the cold. It was already 3pm and it seemed to me like the sun had not come out the whole day. From there our commander took us to a big ... three, and what we have to do every time we saw him. He made us run all over the base and finally took us to our tents. The tent was big, and wet from the rain. The bed was actually a piece of hard canvas. It was obvious that sleep was going to be very hard and uncomfortable. We ate dinner, which reminded me of lunch, and later we had ...
- 389: Oil Never Sleeps
- ... didn't give many reasonable solutions, there can always be safer ships, but until this "culture of oil" develops higher understanding or moves on, we will all have to deal with spills, land contamination, and acid rain. If the earth is our mother, then oil is our lover.
- 390: Indicactor Lab
- ... B: Test-tube B had spoiled milk in it. The substance reacted to blue litmus paper, and red litmus paper underwent no change. Phenolphthalein did not change, and the pH value was 6, a weak acid. The appearance of this substance was a thick, white liquid that had a horrible odor. These observations led me to my conclusion that substance B is spoiled milk. Test-tube C: Test-tube C had ... Test-tube D: Test-tube D contained lemonade. The substance reacted to blue litmus paper, and red litmus underwent no changes. It had no effect on Phenolphthalein, and its pH value was 3, a strong acid. Knowing that lemons are very acidic, and that the substance was yellow and sweet smelling, I concluded that substance D was lemonade. Test-tube E: I could not come to a conclusion on what substance ... appearance and smell were not of any help, because it was a clear substance with a slight odor I couldn t key in on. So my conclusion is that this substance was an extremely weak acid of some sort. Test-tube F: Test-tube F contained sodium hydroxide. The substance had a very strong reaction to red litmus and no reaction to blue litmus paper. It had a very strong ...
Search results 381 - 390 of 1458 matching essays
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