In March‚ I was honored to have been elected the first President of the TLC‚ which has tripled in membership. Thus far‚ I have been helping the Board of Directors with the expansion of the museum to a bigger building‚ which will accommodate more children and exhibits. This process has helped me grow and has strengthened my
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separation and the purity of the product. Thin layer chromatography theory of separation is the same as column chromatography. However‚ TLC is used to analysis of compounds rather than for separation of compounds. The crystals are dissolved and spotted onto the column‚ where a developing solution is used to separate the compounds by polarity using a silica complex TLC
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Histidine. These standards and the unknown were separated by performing a method of chromatography. Thin layer chromatography (TLC) was performed by using a mobile phase and a stationary phase. The mobile phase was a nonpolar solvent composed of ethanol and ethyl acetate. The solid stationary phase was coated with silica gel‚ which is very polar. The amino acids were spotted onto two TLC plates; the plates were then placed in a chamber which contained the mobile phase. The plates were sprayed with 0.1% Ninhydrin
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A simple‚ precise‚ accurate and rapid High-Performance Thin Layer Chromatographic method has been developed and validated for the simultaneous estimation of of ellagic acid‚ chlorogenic acid‚ gallic acid and quercetin in the leaf extract of Terminalia tomentosa and its Formulation. The stationary phase used was precoated silica gel 60F254.The mobile phase used was a mixture of Butyl acetate: Formic Acid: Distilled Water 14:5:5 (v/v). The detection of spots were carried out at 254 nm. This HPTLC method
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Practical Book Review of Petersen Text Lori Edwards Azuru Liberty University Summary James Petersen (2007) illustrates an innovative way of communicating in the book‚ Why Don’t We Listen Better? Communicating and Connecting in Relationships. This book is divided into five sections. In part one Petersen (2007) discusses the “Flat-Brain Theory of Emotions” (p. 10-11). This is his way of explaining what occurs when one is overcome with emotions‚ and can no longer communicate with
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Final Organic Study Guide: Be able to develop an Experiment Beginning to End * Find a good reaction * Good reaction is defined by high yield‚ green chemistry (less waste‚ less harmful chemicals) * Reaction found on Reaxys * Find MSDS Sheet for all Compounds (Reactants‚ Products and Side Products) * It is important to know what you are working with * The toxicity category numbers are there to gauge how toxic the chemical is‚ 4 being most severe and 1 being least
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Isaac J Garcia 23 Sept 2013 Essay 2 Eng. 095 Subject - Milk Chocolate or Dark Chocolate Type - objective essay Role -facts Audience – everyone Purpose – to inform In this objective essay I will compare milk chocolate with dark chocolate. First there was chocolate‚ from milk to dark but which one would be favored. Many people would say milk chocolate and then some would say dark chocolate. For many reasons this could be pretty much up in the air. If you asked
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Reminder: These notes are meant to supplement‚ not replace‚ the laboratory manual. A Diels-Alder Reaction History and Application: The 1950 Nobel prize in chemistry was awarded to Otto Paul Hermann Diels and Kurt Alder for their breakthrough work on the discovery and development of [4 + 2] cycloaddition reactions i. This set of reactions are enormously useful in the synthesis of six membered rings in a single stepii. These are used in many pharmaceutical applications. Tamiflu® is a drug which
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Psidium guajava L‚ belonging to the Myrtacea family‚ has been reported to have anti-diarrheal‚ hepatoprotective‚ hypoglycemic‚ lipid lowering‚ antibacterial and antioxidant activities. It contains important phytoconstituents such as tannins‚ triterpenes‚ flavonoid:quercetin‚ pentacyclic triterpenoid:guajanoic acid‚ saponins‚ carotenoids‚ lectins‚ leucocyanidin‚ ellagic acid‚ amritoside‚ beta-sitosterol‚ uvaol‚ oleanolic acid and ursolic acid. In view of the immense medicinal importance of the plant
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Alyssa Caparelli Organic Chemistry 12A Professor Alston October 28‚ 2014 Isolation of Chlorophyll and Carotenoid Pigments from Spinach Purpose The purpose of this experiment was to isolate ß-carotene‚ chlorophyll-A‚ and chlorophyll-B from spinach using column chromatography. Spinach was dehydrated using ethanol‚ and the pigments were extracted with dichloromethane. The spinach extracts were dried using CaCl2. Then‚ the solid pigments were run through a column using a non-polar solvent‚ hexane
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