* Lyocell is NOT a type acetate * Rayon is significantly heavier than cotton. * Solution dyed Fibers are NOT modified for to accept dye more readily. * Parent Fibers are NOT fiber that a have been modified for specific end uses. * Cross-Dyeable fibers are NOT colored when they are extruded. * Acetate is often used in lining fabrics because of its smooth‚ slick surface and ease of handling in sewing facilities. * Acetate has poor abrasion and heat sensitive
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Investigatory Project In Science IV Submitted by: Mary Rose L. Perez IV-St. Matthew Submitted to: Mrs. Leira B. Tobias Teacher in Science IV CHAPTER 1: Cacao Leaves as Natural Insect Repellant This study is a experimental research and was conducted to establish the efficacy of cacao leaves decoction on the treatment of escalation of insects. To abolish the use of DEET (N‚N-diethyl-3- methylbenzamide)‚ a chemical formulation developed during
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classifications. Materials Broth cultures of Staphylococcus aureus and Pseudomonas fluorescenes‚ a Bunsen burner‚ one inoculating loop‚ one clean glass slide‚ one slide dish‚ bibulous paper‚ Gram-staining materials (Crystal Violet‚ Iodine‚ Ethyl Alcohol‚ Safranin‚ DI water)‚ and a microscope. Methods Smear Preparation Obtained a clean dry glass slide‚ Staphylococcus aureus and Pseudomonas cultures. Added drop of water onto the center of slide. 3. Flame-sterilized inoculating loop
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buffer solution. One is capable of reacting with OH- and the other will react with H3O+ and they must not react with each other. Many buffers are prepared by combining a weak acid and its conjugate ( as in this experiment‚ acetic acid and sodium acetate) or a weak base and its conjugate (ammonia and ammonium chloride). In general‚ the pH range in which a buffer solution is effective
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Experiment 1 : Design and preparation of buffers effective at different pHs Abstract The body uses natural buffers to maintain the many different pH environments in our body. This is important for optimum activity of our enzymes. When doing experiments in vitro using these enzymes it is important to mimic intracellular conditions using artificial buffer systems in order to obtain accurate results. In this experiment the buffering properties of three artificial buffer systems containing acetic
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Introduction Esters are in a lot of natural products like flowers‚ spices and fruits. They are usually used in artificial flavorings. Carboxylic esters help amplify the sensory effect of esters. Isopentyl acetate is made from the direct esterification of acetic acid and isopentyl alcohol. The direct esterification of acetic acid and isopentyl alcohol is an equilibrium reaction that shifts the product to the side by using the excess of one of the starting reagents. Acetic acid usually used in excess
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smell of rotten eggs (H2S); turns lead acetate paper black 1. Sodium nitroprusside test: WE + sodium nitroprusside 4 = purple / violet colour 2. Lead acetate test: WE + lead acetate 5 (aq) = black ppt 5. Nitrite: Pungent light brown gas 1. Starch-iodide test: WE + dil H2SO4 (or dil acetic acid); boil‚ then add solid KI + fresh starch sol = deep blue colouration Group II (conc H2SO4 group) – Cl(chloride)‚ Br- (bromide)‚ I- (iodide)‚ NO3- (nitrate)‚ CH3COO- (acetate)‚ C2O42(oxalate): Salt + conc H2SO4
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Naphthalene in water c. Amphetamine in ethyl alcohol d. Aspirin in water e. Succinic acid in hexane f. 1-Decanol (n-decyl alcohol) in water 2. Predict whether the following pairs of liquids would be miscible or immiscible. It may be helpful to look up some of the chemical structures. (3pts) a. Benzene and water b. Water and methyl alcohol c. Hexane and benzene d. Methylene chloride and benzene e. Water and toluene f. Ethyl alcohol and isopropyl alcohol 3
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Key Questions Unit Two Lesson Five 91/92= 99 % 15. a) 2‚3‚5-trimethylhexane b)3-ethyl-2‚4‚6‚7-tetramethyloctane c)2‚2-dimethylpentane 6 16. a)3-ethyl-3-methylhexane CH3 | CH3-CH2-CH-CH2-CH2-CH3 | CH2CH3 b) 1-ethyl-3-propylcyclohexane c) 2‚4-dimethylheptane CH3-CH-CH2-CH-CH2-CH2-CH3
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e dominant position in world menthol production. 90% crop of India‚ grown in Uttar Pradesh‚ rest 10% in Punjab‚ Haryana and Rajasthan. Recently‚ Mentha Herb was developed in Madhya Pradesh & Gujarat but in little quantity Uses and Application Menthol mint essential oil is the main source of natural menthol. The dementholised oil (DMO) is reconstituted to produce oil similar to Mentha piperita oil. Many dozens of terpenes present in the essential oil are valuable compounds that find uses in
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