Introduction: The method for purifying solids is done by observing the melting point. This is important because if there is an impure substance the melting point would be depression and the melting range would be broader. By finding the melting point of a known substance one can then observe an unknown substance’s melting point to see if the points are the same and try to figure out the unknown. Experimental Section: The first known substance we used was Biphenyl. 68 degrees Celsius is the
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the market. A comparison between the international and Chinese situation is also offered. Browse Full Report with TOC: http://www.qyresearchreports.com/report/global-and-china-vehicle-exhaust-purification-system-industry-2013-market-research-report.htm Global and China Vehicle Exhaust Purification System Industry Research Report 2013 also focuses on development policies and plans for the industry as well as a consideration of a cost structure analysis. Capacity production‚ market share analysis
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Expression and Purification of Human Platelet-Derived Growth Factor Beta (PDGF-B) Rachel C. Hermina-Stewart* and Elsie I. Parés-Matos† *Industrial Biotechnology Program‚ †Department of Chemistry University of Puerto Rico-Mayagüez Campus rachel.hermina@upr.edu December 14‚ 2009 ABSTRACT. Platelet-Derived Growth Factor (PDGF) is one of many proteins that regulate cellular growth and division. The PDGF family consists mainly of five different isoforms called as PDGF-A‚ PDGF-B‚ PDGF-C and PDGF-D. Three
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Cheryl Baclit Chem 234 Experiment 4: Steam Distillation Introduction The purpose of this experiment is to extract Eugenol from Cloves using steam distillation as a purification technique and to transfer Eugenol from the aqueous phase to the MeCl2 phase. With steam distillation‚ the boiling point of a mixture of immiscible liquids is lower than the boiling points of the individual components. Water from the steam is one of the components of an immiscible liquid mixture. The vapor pressures of
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reaction mixtures in which the final product results in high boiling residues such as tars‚ inorganic salts‚ and other relatively involatile components. It is useful in isolating volatile oils from various parts of plants and not useful in the final purification of a liquid because it cannot separate components that have similar boiling points. The difference between simple distillation and steam distillation is that more water may be added during the distillation during steam distillation. Simple distillation
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Objective: In steam distillation lab (lab 3)‚ we must obtain pure Eugenol from cloves through the process of steam distillation. In the crystallization lab (lab 4) part 1‚ we must acquire the best possible pure crystallization of acetylsalicylic acid from aspirin and in part 2 we must obtain a similar pure crystallization of benzil from an impure mixture of benzil. Materials: In lab 3‚ we used 75 g of cloves from which we must extract Eugenol. Water was largely used as a solvent. A polar solvent used
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2: Isolation of Eugenol from Cloves Background; Readings on Vapor pressure‚ Raoult’s Law from TRO: A mixture of the essential oils‚ eugenol and acetyleugenol‚ will be steam distilled from cloves. These compounds are isolated from aqueous distillate by extraction into dichloromethane. The dichloromethane solution is shaken with aqueous sodium hydroxide‚ which will react with eugenol‚ to yield the sodium salt of eugenol in the basic aqueous layer
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the home while allowing people to keep their doors open. After considering numerous ideas I concluded that the best way to do this is via a eugenol based fly spray. Due to tests done by Dr Sinthusiri we have evidence that suggests house-flies will move away from areas that have eugenol sprayed into them. To make it non-harmful and easy to install‚ the eugenol will be dispersed in automatic canisters set to
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These data are consistent with the structure of eugenol‚ shown in Figure 2 below: In addition‚ the IR of the product from the steam distillation of cloves closely corresponds with that of an authentic sample of eugenol shown in the lab text.9 Therefore‚ it can be concluded that the oil which was isolated from cloves is in fact‚ eugenol. 0.53 g of eugenol was recovered from 5 g of cloves. This corresponds to a percent recovery of 7.46%: Amt. Eugenol isolated 0.53 g % Recovery = ------------------------------
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orange (the peel contains limonene‚ which is a terpene) and a dichloromethane solution of clove oil (which contains eugenol‚ an acetogenin). To isolate the eugenol‚ 20 mL of dichloromethane solution of clove oil was extracted twice; each time with a 15 mL portion of 3M NaOH. The aqueous extracts were then combined and acidified with approximately 17.6 mL of 6M aqueous HCl. Eugenol was isolated from the aqueous mixture by two extractions of 10 mL portions of dichloromethane. The dichloromethane extracts
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