References: 1) E. Stahl‚ Thin Layer Chromatography‚ Springer-Verlag‚ New York‚ 1969 2) Camag Scientific‚ Inc.‚ 515 Cornelius Harnett Drive‚ Wilmington‚ NC 28401‚ phone 800-3343909‚ fax 919-343-1834 3) Desaga GmbH‚ P.O. Box 101969‚ D-69009 Heidelberg‚ Germany‚ phone 0-62-21-83590‚ fax 0-62-21-840887
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Gas Chromatography: Purifying alcohol Introduction The goal of this lab is to understand the principles of chromatography by purifying alcohol using fractional distillation. Running standards with gas chromatography we were able to see and calibrate our data to find not only how much ethanol our alcohol attained but also what a mixed unknown sample contained. Chromatography is a way of being able to separate substances in solution that can help not only identify the analytes (the studied
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Eagle eye From Wikipedia‚ the free encyclopedia For other uses‚ see Eagle Eye (disambiguation). Eye of a Golden Eagle The eagle eye is among the strongest in the animal kingdom‚ with an eyesight estimated at 4 to 8 times stronger than that of the average human.[1] An eagle is said to be able to spot a rabbit 2 miles (3.2 km) away.[1] Although an eagle may only weigh 10 pounds (4.5 kg)‚ its eyes are roughly the same size as those of a human.[1] As the eagle descends from the sky to attack
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Post Lab #4- Column Chromatography Organic Chem 3418-2 March 3‚ 2011 Theoretical Background- The fluorene and fluorenone mixture was separated by first dissolving the mixture in heptane. Since “like dissolves like”‚ fluorene dissolves with the non-polar heptane and the polar fluorenone dissolves in the polar ethyl acetate solvent. This phenomenon was illustrated in class before the experiment‚ when it was pointed out why water will not dissolve fluorene‚ fluorenone‚ or transstilbene
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RADICAL HALOGENATION AND GAS CHROMATOGRAPHY Abstract In radical halogenations lab 1-chlorobutane and 5% sodium hypochlorite solution was mixed in a vial and put through tests to give a product that can then be analyzed using gas chromatography. This experiment was performed to show how a radical hydrogenation reaction works with alkanes. Four isomers were attained and then relative reactivity rate was calculated. 1‚1-dichlorobutane had 2.5% per Hydrogen; 1‚2-dichlorobutane had 10%; 1‚3-dichlorobutane
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Chromatography: Separating Mixtures Introduction: Magic marker inks are often mixtures of several compounds. Paper chromatography is a common method of separating various components of a mixture. After separation‚ you can observe the different colors that make up a particular color of magic marker ink. You can also calculate a ratio Rf‚ which compares how far each compound traveled to how far each solvent (substance that dissolves another substance) traveled during the experiment.
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THE EYE. The normal sighted human eye perceives an object which is ‘described’ by light rays and how they are bent by it . Usually‚ the image of the object is picked up on the retina‚ on the area of the Central Forea as an upside down picture which is then ‘righted’ by the brain in order that the object may be seen. Different distanced objects are perceived by the eye and the lens is the part that makes this possible. Objects which are close to the eye are seen by the eyes’s lens becoming thicker
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Chapter 9: The Eye * Light is electromagnetic energy that is emitted in form of waves; waves crash into objects and are absorbed‚ reflected‚ scattered‚ and bent * Half of human cerebral cortex is involved with analyzing visual world * MAMMALIAN VISUAL SYSTEM: begins with eye‚ back of eye is retina (contains photoreceptors specialized to convert light energy to neural activity) * Eyes have features to track moving objects and keep transparent surface clean (i.e. by tears) *
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Thin-Layer Chromatography of Analgesics Abstract: In this experiment thin-layer chromatography (TLC) was used to determine the composition of an unknown mixture of analgesics given five references of AC‚ ASP‚ CAF‚ IBU‚ SAL‚ an unknown consisting of a mixture of three of the references‚ and two unknowns (6‚23) containing a single reference compound. The composition of the unknown mixture and two single unknowns were determined by spotting the reference compounds and the unknown compounds on two
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Gillian Wagner April 30‚ 2011 ENGL 3353 Modern American Fiction Dawn and Doom in the Branches “There is no agony like bearing an untold story inside of you.” Zora Neale Hurston Zora Neale Hurston’s novel‚ Their Eyes Were Watching God‚ was written in 1937 at the tail end of the Harlem Renaissance. It is a passionate tale of Janie Crawford’s evolving self as she goes through three marriages and a life of triumphs and tragedies. The novel starts off with Janie retracing her steps by coming
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