silk substitute‚ and used for products ranging from women’s stockings to tooth brushes and military parachutes. The variety of synthetic fibres used in manufacturing fibre grew steadily throughout the 20th century. In the 1920s‚ acetate was invented; in the 1940s‚ acetate‚ modacrylic‚ metal fibres‚ and saran were developed; acrylic‚ polyester‚ and spandex were introduced in the 1950s. Polyester became hugely popular in the apparel market‚ and by the late 1970s‚ more polyester was sold in the United
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REPORT EXPERIMENT 9 CARBOXYLIC ACID AND DERIVATIVES Date: January 19‚ 2004 Objectives: 1. To understand the reactions of carboxylic compounds and derivatives. 2. To know the methods for preparing carboxylic acid derivatives. 3. To know the methods for testing the carboxylic acid derivatives. Experimental Procedures: 9.1 Solubility 1. Prepare 3 test tubes with 3 ml of water in each. 2. Place 3 drops of acetic acid‚ benzoic acid‚ and oxalic acid in separate test tubes. 3. Shake and observe
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______________________________________________________________________ 8. Draw a diagram of a water molecule showing the polarity. 9. The process of an ionic solid breaking down into individual ions is called 10. Given a saturated solution of sodium acetate‚ outline the procedure you
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Sulfate-reducing bacteria like Thermodesulfobacteria fall into more than 20 separate genera and can be classified by the types of substrates that they use. They are divided by their ability to use acetate as a source for electrons. Thermodesulfobacteria are in Group 2 of sulfate reducing bacteria because it can use acetate and some fatty acids. Thermosulfobacteria are also important in aerobic environments if they can rapidly reproduce in anaerobic environments. For example‚ in marine sediments
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CO2H OH salicylic acid 2g 0.014 mole O O O CH3 H2SO4 ethyl acetate CO2H O O acetyl salicylic acid acetic acid CH3 O + H3C + H3C OH acetic anhydride 5 mL 0.05 mole The limiting reagent is salicylic acid. The theoretical yield of acetyl salicylic acid is 2.52 g. Physical Data:* mp MW salicylic acid 157-9˚ 138 acetyl salicylic acid 135-6˚ 180 acetic anhydride — 102 acetic acid — 60 sulfuric acid — 98 ethyl acetate — 88 *Data from the CRC‚ 70th ed. bp — — 138˚ 117-8˚ — 77˚
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of 0.5 M NaOH to raise pH by 2 units (mL) | | | Volume of 0.5 M HCl to lower pH by 2 units (mL) | | | Volume of 0.5 M NaOH at equivalence point (mL) | | | Data Analysis 1. Write reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base. 2. Buffer capacity has a rather loose definition‚ yet it is an important property of buffers. A commonly seen definition of buffer capacity is: “The amount of H+ or OH– that can be neutralized
Free PH Acid dissociation constant Acetic acid
Tris(acetylacetonato)manganese Dissolve 0.26 g manganese(II) chloride tetrahydrate and 0.68 g of sodium acetate in 10 mL of distilled water. Add 1 g acetylacetone and swirl the mixture. With magnetic stirring‚ add dropwise a solution of 0.052 g potassium permanganate in 2.5 mL of distilled water over a period of 10-15 minutes. Stir for 10 minutes‚ then add dropwise a solution of 0.63 g sodium acetate in 2.5 mL distilled water. Heat the resulting mixture on a hot plate to between 60 and 70oC for 15 minutes
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CHAPTER 4 Presentation‚ Analysis and Interpretation of Data This chapter includes discussion on the presentation‚ analysis and interpretation of data obtained in the physical‚ chemical‚ and biological test. 1. Extraction and Isolation of Tannins An extraction and isolation was conducted by the researchers to determine and calculate the amount of tannins from the Otaheite Gooseberry leaves. The results are the following: Table 1 Result of the Extraction and Isolation of Tannins Weight of
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Pharmacologyonline 3: 64-72 (2006) Newsletter ROLE AND SCOPE OF ETHNOMEDICAL PLANTS IN THE DEVELOPMENT OF ANTIVIRALS Debprasad Chattopadhyay ICMR Virus Unit‚ ID & BG Hospital‚ GB 4‚ First floor‚ 57 Dr. Suresh C Banerjee Road‚ Beliaghata‚ Kolkata 700 010‚ India. Summary Ethnomedicinal plants have been used as source of drugs for almost all diseases‚ but none are used against viruses probably because there are a very few specific viral targets for natural molecules to interact. Most
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Pyruvate dehydrogenase complex catalyzes three reactions‚ getting rid of Pyruvate’s carboxyl group (COO−) because it was already fully oxidized‚ using the remaining 2-carbon fragment to form acetate while also transferring extracted electrons to NAD+ to form NADH+‚ and lastly attaching coenzyme A to acetate‚ forming acetyl CoA. Since this whole process was done for 2 Pyruvate molecules‚ we have two acetyl CoA molecules. The acetyl CoA then enters the Krebs cycle and is attached to a 4-carbon molecule
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