different dye-doping concentrations. The open aperture Z-scan study shows that the dye-doped sample shows a considerable amount of saturable absorption property. But at higher input intensity‚ the two-photon absorption and the reverse saturation absorption properties of the dye in polymer film becomes prominent as shown in Z-scan graph of figure 8. From figure 6‚ it is seen that the transmission at the focus decreases with increasing sample concentration. At higher concentration‚ the dye-doped sample
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individually. This is accomplished in this lab by the technique called thin layer chromatography (TLC). TLC involves a stationary phase‚ which the TLC plates as well as a mobile phase‚ which could be one of two solvents used: ethanol-acetone for TLC. Dyes in a sample separate consequently because of their unique polarities. As a result‚ nonpolar substances travel further than polar substances in this process. The separation of a mixture into its components by TLC transpires because the distinctive components
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stain‚ Gram-positive bacteria stain with a _________ color due to the incorporation of the _________ dye into their cell wall. A. purple‚ safranin B. purple‚ crystal violet C. red‚ safranin D. red‚ crystal violet 4. What is the function of the mordant iodine in a Gram staining procedure? A. A mordant causes the crystal violet to run. B. A mordant fixes the bacteria to the slide. C. A mordant keeps dye attached to an object. D. All of the above 5. What is the order of reagents used in the Gram stain
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Separation Of A Dye Mixture Using Chromatography ********* AP Chemistry (3rd Block) Fauquier High School 8/ 31/ 13 ABSTRACT: The Rf values of seven known color dyes and three unknown samples were observed in order to compare results and discover the hidden identities of the three samples. Three solvents‚ H2O‚ Isopropyl alcohol‚ and a 2% NaCl solution‚ were introduced to the dotted chromatography strips to show three different ratios for each dye on account
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Flowers Used for Dye Hollyhocks Hollyhock‚ or Alcea rosea‚ petals are available in varying shades from nearly white to almost black. The dyes made from these petals range in color from bright green to greenish brown depending upon how the blossoms are prepared. According to Rakhi Shanker and Padma S. Vankar from the Facility for Ecological and Analytical Testing in Kanpur‚ India‚ a substance such as alum or other metal salts is used to make the dye stay on the fabric without quickly washing out.
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February 22nd‚ 2012 Abstract The purpose of the lab was to determine the order of reaction for the dye Red #40. By measuring the reaction rate between bleach and the dye‚ the order of the reaction was determined to be first order. Introduction The study of kinetics is important for studying the amount of time it takes for a particular reaction to reach completion. By comparing two solutions of dye that have different concentrations‚ the reaction rate can be experimentally found. At this point
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KINETIC‚ THERMODYNAMIC AND ISOTHERM STUDIES ON THE REMOVAL OF MALACHITE GREEN DYE FROM WASTEWATER USING ALPC. ABSTRACT: The aim of the present work is to investigate the quantity of removal of Malachite Green dye from aqueous solution using Activated Los Pantanos De Villa Carbon (ALPC). Generally‚ dyes are used in chemical‚ textile‚ paper‚ printing‚ leather‚ plastics and food industries. The need for the treatment of dye contaminated waste water passed out from the industry. In this study‚ Los Pantanos
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of Runs | Red Dye | Blue Dye | | Run #1 | Run #2 | Run #1 | Run #2 | Bandwidth (mL) | .95 | .88 | 2.15 | 1.92 |
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gets its glossiness by plunging it in myrobalan and milk mixture. Curves and motifs are then drawn with a pointed kalam soaked in fermented jaggery and water mixture. These layers are applied individually followed by application of natural vegetable dyes. After application of each colour‚ the textile is dried and washed. As a result‚ each cloth goes through about 20 washes. The specialty of Kalamkari paintings is that after the long tedious process‚ when the painting is completed‚ the finished products
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The objective of this experiment was to synthesize indigo and azo dyes and use them to observe their effectiveness in dying natural fabrics. The results of the experiment are summarized below. Weights Starting materials: • Aniline-3-sulfonic acid: 0.493 g • Salicylic Acid: 0.398 g Azo Dye: 0.515 g % Yield: (actual/theoretical) x 100 • Actual 0.515 g • Theoretical: o Aniline-3-sulfonic acid: (0.493 g/173.19g/mol) = 0.00285 mol o Salicylic acid: (0.398 g/152.15 g/mol) = 0.00262 mol o Limiting Reagent:
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