plants for the staining of selected bacteria and moulds‚ January 4‚ 2011‚ African Journal of Microbiology Research Vol. 5(1)‚ pp. 79-86 Coxx‚ H Ozela‚ Eliana Ferreira‚ Stringheta‚ Cesar Paulo‚ and Chauca‚ Milton Cano‚ Stability of anthocyanin in spinach vine (Basella rubra) fruits‚ 2007‚ Cien. Inv. Agr. 34 (2):115-120.
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absorbing pigment that in different variations absorbs different wavelengths of light‚ as well as other light absorbing pigments like carotenoids and hydrocarbons (Campbell‚ 2008). Chlorophyll a and b along with carotenoids each have a different absorption spectrum that allows them to process a different wavelength of light for photosynthesis (Wiles‚ 2013). In this experiment we tested varying wavelengths of light to see which would cause photosynthesis to occur to the greatest degree in spinach leaf
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Plants contain many pigments in different proportions. For flowering plants it’s mostly a combination of chlorophyll-A‚ chlorophyll-B‚ pheophytin and Carotenes. These pigments have shades of green‚ blue green‚ grayish‚ and yellow-orange. Their concentration is different for different species and also depends on the time of year. Also‚ these pigments have different solubility in different solvents. Extracted pigments could be used in another project‚ such as chromatography. Attention! This
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Experiment # 4 Paper Chromatography 1. Why is the chromatogram developed in an essentially closed system? - The chromatogram is developed in a closed system in order to prevent the solvent to evaporate. Most solvents used in the chromatograph are toxic and flammable. It is also put in a close system to reduce the chance of outside factors affect the chromatograph. 2. What is the main advantage of 2-dimensional paper chromatography over a 1-dimensional one? - The
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this reduction reaction ultimately come from water‚ which is then converted to oxygen and protons. Energy for this process is provided by light‚ which is absorbed by pigments. Chlorophylls absorb blue and red light and carotenoids absorb blue-green light but green and yellow light are not effectively absorbed by photosynthetic pigments in plants; therefore‚ light of these colors is either reflected by leaves or passes through the leaves(Arizona 2007). This is why plants are green. A certain colors
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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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La Bella Blue Cancer prevention: Blueberries Spinach Blueberries is one of the many cancer preventing foods. Blueberries are full of antioxidants and flavonoids that prevent cell damage from happening. Antioxidants is a substance‚ like Vitamin C or E that counteracts the damaging effects of oxidation in a living organism. A flavonoid is any group of organic compounds that occur as a pigments in fruits and flowers. One thing that antioxidants is neutralize free radicals‚ atoms that contain
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absorption of isolated chloroplasts from spinach absorption readings were taken at a series of different wavelengths. Absorption Maxima of the isolated chloroplasts were observed at wavelengths of 440 and 680 with corresponding absorbance values of 0.792 and 0.589 were noted (Fig 1.). Absorption minima of the isolated chloroplasts was noted at a wavelength of 580 at an absorption of 0.291 (Fig 1.). This indicated that green light is reflected strongly by the spinach pigment. (Dansereau‚ 2013) Figure
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