Chromatography of Commercial Analgesics Chromatography of Commercial Analgesics CHEMISTRY 200L EXPT 4 PAGE 8 - 11 CHEMISTRY 200L EXPT 4 PAGE 8 - 11 Janna Vernice R. Villalon*‚ Christian V. Villanueva‚ Cyd Vincent L. Zamora Department of Chemistry‚ College of Science *Corresponding author; e-mail: janna.villalon@rocketmail.com Abstract In analyzing the chromatography of analgesics‚ thin layer chromatography (TLC) was used. A very thin (micron) film of silica is coated on a glass
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liquid-liquid extraction. Then crude material obtained was then purified by sublimation. The isolated caffeine was subjected to thin layer chromatography (TLC) together with a standard caffeine. The Rf value obtained for both isolated caffeine and standard caffeine was 0.24. Keywords: solid-liquid extraction‚ multiple liquid-liquid extraction‚ sublimation‚ thin layer chromatography‚ percent caffeine Introduction Many organic compounds are obtained from natural sources through isolation. In this experiment
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Title: Candy Chromatography Background Information and Research: Paper Chromatogrpahy is a analytical method that is used for seperating and identifying mixtures of color. There are two stages‚ the stationary phase and the mobile phase. The first is for a solid and the second for a liquid or gas. -Reference http://www.chemguide.co.uk/analysis/chromatography/paper.html Purpose: To see how paper chromatography works. Materials: · Candy with a colored coating‚ like Skittles® or M&Ms® (4 different
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experiment was to take spinach leaves and extract the chlorophyll and carotenoid pigments by using acetone as the solvent. The chlorophyll and carotenoid pigments were extracted by using column chromography and alumina was used as the solvent. Solvents of different polarities were used‚ starting with the least polar‚ to extract the certain components from the leaves. They were then analyzed by using thin- layer chromatography. Procedure: The first part of the experiment dealt with breaking down the
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occur on the granal membranes. Pigments are required to absorb and transduce the light energy. Membrane proteins act as electron carriers. 2. The light independent reactions that occur in the stroma of the chloroplast. Chlorophyll and other pigments are grouped together to form a photosystem. There are two photosystems‚ photosystem II(P700) and photosystemI(P680) Each photosystem acts as a light harvesting system; light energy is passed from the accessory pigments to the chlorophyll in the reaction
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the food you eat.Keeping this in mind‚ what organelle do you think would be the most numerous inside the cells of your mouth? (Hint: what organelle is responsible for breaking things down and digesting?) lysosomes What is the movement of the chloroplasts in the hydrilla leaf cells? what its direction? and what process could account for the movement of the cytoplasm? Clockwise movement. The lipotubuloids consisting of osmiophilic granules surrounded by a system of microtubules move from one place
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and plants. The photosynthesis process rate varies from different wavelengths and intensities of light. This lab will evaluate the optimal wavelengths and degrees of intensity during photosynthesis when chloroplast is exposed to light. The mixtures of DCPIP with water‚ PO4 buffer‚ and chloroplast will be prepared in a number of cuvettes. The cuvettes were tested individually at different wavelengths and intensities to find the optimal rate of photosynthesis by using a spectrophotometer‚ measuring
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chloroplast: in plants‚ contain photosynthetic pigments that turn light‚ CO2 and H2O into glucose | | |5. chromosome: packaging of DNA in nucleus. Functions in cell division | |
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AP Biology Unit Test Review Guide Plants Obtaining and Transporting Nutrients Pigments and photosynthesis 1. Distinguish between the strategies used by autotrophs and heterotrophs to obtain free energy for cellular processes. In other words‚ how and in what form does each capture and store that energy? 2. Explain how photosynthesis differs in eukaryotic organisms (with organelles such as chloroplasts) and in prokaryotic organisms (single-celled‚ no organelles). 3. How does a metabolic
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FORENSIC CHEMISTRY FORENSIC CHEMISTRY SUMMARY NOTES |Ensuring accuracy and contamination of samples for analysis – 1a and 1A |Ensuring accuracy and contamination of samples for analysis – 1a and | | |1A (continued) | |Caution must be taken by scene investigators with regard to their tools‚ |
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