thin layer chromatography (TLC) was used. A very thin (micron) film of silica is coated on a glass plate or a sheet of aluminum or plastic. The ingredients of commercial analgesics were characterized in comparison with chromatograms of aspirin‚ Acetaminophen‚ caffeine and mefenamic acid. After the TLC was placed inside a UV chromatography box‚ it appears that the sample analgesic contains D‚ which is mefenamic acid. Keywords: Chromatography‚ Pigments‚ Analgesics‚ TLC Results and discussion
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organic phase are used. During extraction the desired compound moves one phase and leaves the unwanted substance behind. Extraction normally has to be done a few times to leave all of the impurities behind. TLC plating can be used to mark the progress of the extraction. Thin Layer Chromatography (TLC) Plating: This is a common method that is used to monitor the progress of a reaction and determine when it is complete. In our chromatography there was a stationary phase/adsorbant of Silica gel and we
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Discussion and Scientific Explanations The reaction was conducted using granular tin and hydrochloric acid. This mixture provided both a source of electrons and protons1. The electrons worked as the reducing agent in this mechanism1. Granular tin was chosen over a single plate of tin due to the fact that it would take much more time and effort to fully dissolve a single plate of tin. A plate of tin would be more bonded to each other and less likely to be reactive. With the addition of the concentrated
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chloroform (1:1 v/v). All the three extractions were pooled and concentrated in vacuum at 40°C using a rotary evaporator. The crude extract was then diluted in minimum amount of chloroform (2ml) and citrinin was estimated by thin layer chromatography (TLC) according to Razak et al.[16] Subsets of citrinin obtained were estimated by High performance Liquid Chromatography (HPLC). The control contained PDB broth and 10 μl of fungal suspension. Briefly‚ different volumes (1 to 5 µl) of sample extracts were
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5.5 | -4.5 | 0.5 | b- Suppose the price for a basic car wash (no under coating ‚no wax treatments etc.) in his area of business is LE 5. How many people should he hire if he pays each worker LE 6 / he.? L | TP | MP | AP | TRP | MRP | TLC | MLC | TRP-TLC | MRP-MLC | 0 | 0 | | | 0 | | 0 | | 0 | 0 | 1 | 5.5 | 5.5 | 5.5 | 27.5 | 27.5 | 6 | 6 | 21.5 | 21.5 | 2 | 10 | 4.5 | 5 | 50 | 22.5 | 12 | 6 | 38 | 16.5 | 3 | 13.5 | 3.5 | 4.5 | 67.5 | 17.5 | 18 | 6 | 49.5 | 11.5 | 4 | 16 |
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of Chlorophylls and Beta Carotene from Plant Leaves Wang Haina A0133901R 1. Aim 1. To isolate chlorophyll and beta carotene from plant leaves using column chromatography. 2. To qualitatively characterise the pigments with UV-vis spectroscopy and TLC. 2. Results and discussion Isolation of beta carotene and chlorophylls by column chromatography Upon the loading of S1 (the extract of the plant leaves in hexane)‚ a yellow band appeared at the top part of the silica column immediately after the
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. Yes‚ comparably to TLC plate 2 and 3. The benzophenone is more neutral but as the same time its nonpolar‚ being that Silica gel in TLC 2 was polar and the solvent ethyl acetate-hexane is non-polar it moved relatively with the solvent. The stationary phase in TLC 3‚ alumina is non polar and the solvent ethyl acetate is polar so from the ideal that polar does not attract non-polar benzophenone stick stronger to alumina non-polar rather than moving up with polar solvent ethyl acetate as it did in
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Intro In 1936 a scientist named Ruzika was the first ever to make a pure form of testosterone from cholesterol (steroid.com). It is then that steroids emerged as a performance enhancing drug. I am pretty sure we all have pre conceived ideas and notions about steroids and the people that use them. Today I would like to talk to you all about the fact and fiction of steroid usage. 1st I would like to talk about the History of steroids‚ 2nd the types of steroids‚ 3rd anabolic and androgenic affects
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Introduction: This experiment involves an extraction of a natural product using the techniques of steam distillation. The principle component of oil of cloves is an aromatic compound‚ which is identified by thin layer chromatography (TLC). Eugenol is widely used in dentistry‚ due to its analgesic‚ antiseptic balsamic qualities. It is ideal for curative for pulp hyperemia (the soft‚ sensitive substance underneath the enamel and dentine of a tooth) and pulp its. In dentistry eugenol is also used to
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substitution happens when the initially formed intermediate expels one of the substitutes originally bonded to the carbonyl carbon leading to the formation of a new carbonyl compound. In this experiment‚ the specific nucleophilic acyl substitution is esterification. It occurs when a carboxylic acid in salicylic acid and an alcohol combine in a reaction to produce an ester. Figure 11.4. Mechanisms on the formation of aspirin Phosphoric acid protonates the carbonyl oxygen atom (C=O) of the anhydride
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