The Hobbit by JRR Tolkein :: essays research papers

The Hobbit The story starts out telling you about hobbits and stuff that you think you should know before reading the book. Then it talks about the main start Bilbo Baggins just sitting on his porch smoking a pipe about as long as he is. When a wizard named Galdalf come up to him and stares at him for a long while till Bilbo looks up at him and says good morning. Well the go on to talk about an adventure that Galdalf as kind of forced on him. Bilbo does not wish to go on any Adventures thinks that they are not worth the trouble. Well after Bilbo goes in side Galdalf puts a mark on his door. Later the next day there came a knock at his door. He thought it was the wizard but was not. It was dwarf named Dwalin the dwarf later cam 12 other dwarfs named Blain Kili, Fili, Dori, Nori, Ori, Oin, Gloin and Thorin. Thorin was the most important dwarf. That night the all partied and drank and ate in till the next morning where they went on an adventure.   Ã‚  Ã‚  Ã‚  Ã‚  Bilbo woke up and had forgot about the night before in till Galdalf came knocking on his door. He said that the hobbit was late and must ran has fast as he could to some Inn. When Bilbo got there Blain was waiting for him. Then came the rest of the people on ponies and one for Bilbo of course. At first the adventure seemed fine to Bilbo it was peaceful not a car in the world but then it started to turn ugly the lost a lot of food. There where wondering why Galdalf was not with them no more. Well then they saw a light down in the forest. They sent Bilbo down to go see what it was. When he got down there he seen that it was Goblins by the fire. They where eating and talking. When Bilbo went to go back he thought he better at lest steal something when he tried one of the goblin picked him up by his throat and they started to ask him questions. Well when Bilbo had been gone for such a long time that the went to go see what was wrong when the got down there they seen w hat happed and jumped the goblins. All of the dwarfs where captured in sacks.

Extraction of Eugenol from Cloves Oil

Isolation of Acetyleugenol (Clove Oil) from Cloves Purpose In this experiment, you will obtain the essential oil from cloves by steam distillation. You will then separate a component (acetyleugenol) from the oil by liquid-liquid extraction. Finally, you will isolate the acetyleugenol by using a rotovap for reduced pressure distillation, which will remove the organic solvent (dichloromethane). Background Whole cloves contain between 14% and 20% by weight of essential oils, but only half of that can be isolated as acetyleugenol. Clove oil contains two basic compounds: eugenol and acetyleugenol.As a result of Dalton’s Law and Raoult’s Law, both of these substances can be removed from the cloves with a steam distillation. Eugenol is polar due to the acidic hydroxyl (OH) group, but acetyleugenol is not polar. As a result, they can be separated by extraction from a 5% aqueous NaOH solution. Acetyleugenol will dissolve in the organic CH2Cl2 layer, while eugenol remains in the aqueous base layer as a phenoxide. This can be seen in the reaction below (where ArOH is eugenol), because dissolved ions prefer the aqueous phase. ArOH(aq) + OH-(aq) ? ArO-(aq) + H2O(Liq)Acetyleugenol has no acid proton, and cannot ionize. So, it prefers the organic phase. Essential oils from plant materials are used today for medicinal and other purposes. Among these oils are camphor, quinine, oil of cloves, cedarwood, turpentine, cinnamon, gum benzoin, and myrrh. The U. S. FDA has declared clove oil to be the most effective remedy for a toothache. Substances 25 g whole cloves (350 g per lab section) 100 ml DI water (1. 5 L per lab section) 10 ml 5% NaOH (150 ml per lab section) 45 ml CH2Cl2 (650 ml per lab section) Mg SO4 or Na2SO4 (anhydrous) Apparatus Items in kit 50-ml round-bottomed flask distillation head thermometer adapter large bore condenser Claisen adapter 125-ml separatory funnel Items not in kit Plastic funnel 100-ml graduated cylinder stands and clamps aluminum foil heating mantle (for 250-ml flask) 250-ml separatory funnel 125-ml Erlenmeyer flask w/ stopper Rotovap Procedure 1. Place 25 g of whole cloves in a 250-ml round-bottomed flask, and add 100 ml of DI H2O. A plastic funnel can be used if necessary to transfer the cloves into the flask. 2. Set up a well-clamped simple distillation apparatus with the large bore condenser.Insert a Claisen adapter with a 125-ml separatory funnel between the flask and the distillation head, similar to Fig. 23. 4 of Zubrick. Ensure the valve on the separatory funnel is closed. Then cover the flask, distillation head, and the bottom of the heating mantle with aluminum foil to insulate for a faster distillation rate. 3. Collect 60 ml of distillate. Also, simultaneously heat distilled water to ~90oC on a hot plate for addition in step 4. 4. Add 60 ml of hot H2O to the separatory funnel, then open the stopcock to add the water to the flask. Be sure to remove stopper from funnel before opening its valve.Also, be s ure to close the valve after adding the water. 5. Collect another 60 ml of distillate. 6. Add 10 ml of 5% NaOH solution to the distillate to neutralize (deprotonate) the eugenol. 7. Acetyleugenol is not very soluble in H2O, and is easily extracted from the distillate with CH2Cl2. Place the 130 ml of distillate solution in a 250-ml separatory funnel and remove the acetyleugenol with three 15-ml portions of CH2Cl2. Gently shaking the separatory funnel will fail to remove the acetyleugenol, however vigorous shaking will produce a boundary layer that is a visible organic- aqueous emulsion.Therefore, shake vigorously, and remove the lower layer up to, and not including, the emulsion. Caution -Pressure typically builds inside separatory funnel when shaken! Be sure to vent stopcock frequently while shaking! Do not vent towards yourself or any other individual! 8. Combine the CH2Cl2 extracts in a 125-ml Erlenmeyer flask and add just enough anhydrous magnesium sulfate or sodium sulfate (dryi ng agents) so that the solid no longer clumps together. Stopper the flask, and let stand 5 minutes. (Note that stopper size is printed on the flask. ) 9.Decant the organic solution into a weighed 250- or 500-ml round-bottom flask. Leave solid drying agent behind. 10. With the instructor’s assistance, evaporate the solvent with the â€Å"rotovap† to isolate the liquid acetyleugenol. Obtain product mass. Waste Disposal The used cloves can be discarded in the trash. The aqueous waste can be neutralized, and then emptied into the sink. Place used drying agent in the waste jar. Lab techs will place collected solvent from the rotovap in the waste jar as well. Recommended Reading Small Scale Syntheses, pp 25-26 (steam distillation) and 28-29 (extraction).McMurry, J. , Organic Chemistry, pg 626 in 8e, or pg 603 in 7e (phenoxides). Zubrick, J. W. , The Organic Chem Lab Survivor Manual, 6th Ed, pp 183-7 (steam dist), 196-9 (rotovap) and 321-2 (steam dist theory). www. chemfinder . com en. wikipedia. org/wiki/Clove Data To Collect Determine mass of Acetyleugenol after evaporating the solvent in the rotovap. Theoretical Yield Basis: See background section for maximum obtainable quantity. Actual Yield Basis: Report the recovered mass divided by the theoretical yield. Also report recovered mass divided by the initial mass of cloves.For the compounds isolated section, find systematic names, as well as tabulated MP’s and BP’s, for both compounds. Post-Lab Q’s 1. Why is eugenol soluble in aqueous base while acetyleugenol is not? (Hint: McMurry describes some important properties of phenols) 2. How can the eugenol be separated from the aqueous base layer? (after the acetyleugenol has been removed) 3. What properties of clove oil make it an effective remedy for a toothache? 4. How does steam distillation extract water-insoluble oils from the cloves? (Hint: What do Dalton’s Law and Raoult’s Law tell us? ) 5. How does the rotovap fun ction?

Essay about Globalization History, Trends, and Technologies

Globalization: History, Trends, and Technologies Globalization is textually defined as the development of an increasingly integrated global economy marked especially by free trade and free flow of capital, and the tapping of cheaper foreign labor markets (Webster’s Dictionary). Within this definition we can see so many vital pieces that need to coexist in order for it to be a truly globalized environment in this world. Globalization is term that is currently being used more frequently but it doesn’t mean the early forms of it were not already in motion. From the early second century BC, â€Å"silk roads† were being formed which traded goods from one part of a country to another. Early empires were thriving on globalizing their countries by†¦show more content†¦Some of this may seem unfair but still not unlawful. However, a hand full of industries tends to be wooed by the idea of cheap labor and fall for the unethical practice that is using sweatshops. The sweatshop is both metaphor for and proof of the lawlessness and inequities of the new global economy. To keep labor costs low, apparel shop owners usually pay workers a â€Å"piece rate.† That means workers don’t get paid by the hour. Rather, their wage is based on the number of items—shirts, shoes, socks—they complete in a shift. Despite the outliers of sweatshops that still arise every now and then, outsourcing work has really benefitted the entire world for the long run. It has provided skilled yet poor people who have not had an opportunity to implement their skill though they are paid less for it on the grand scheme. It still allows them to have a standard of living. It also allows consumers to purchase goods at lower costs than if the job was not outsourced increasing purchasing power. Globalization accelerates the change of technology. Each moment, a new technological advancement is being made. 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