flame-retardant cotton. Then the cotton itself was painted. It was painted with cellulose acetate butyrate and aluminum powder‚ both of which can be combustible alone. Aluminum powder can be explosive or flammable if mixed with air‚ it is used in liquid and solid rocket fuels‚ and used in thermite‚ which is an incendiary. It also burns and orange-red depending on other elements being present at point of ignition. The cellulose acetate butyrate is combustible and used in everyday items such as hairbrushes. Thought
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HISTORY OF TEXTILE No one knows exact beginning of spinning and weaving of textiles. However‚ it is thought that weaving originated earlier than spinning. Primitive people may have observed the interlaced grass and twigs in the nests of birds or they have seen rushes naturally interlacing as they grew and discovered formation of cloth‚ baskets‚ nets and huts etc. Spinning developed later when people may have thought to improve raw material. People started to use fibers found in nature and hand
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(Lippia graveolens) an essential oil of very similar constitution is found. A typical analysis is as follows: 50% thymol‚ 12% carvacrol‚ 9% p-cymene and a number of further monoterpenoids (1‚8 cineol‚ gamma-terpinene‚ terpinene-4-ol and terpinene-4-yl acetate) in amounts between 1 and 5%. Flowering Oregano. This Italian cultivar has an exceptionally intensive flavor. Origin: Several species of genus Origanum are native to the Mediterranean‚ all of which are traded as a spice. The influence of climate
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------------------------------------------------- Liquid–liquid extraction From Wikipedia‚ the free encyclopedia Liquid–liquid extraction also known as solvent extraction and partitioning‚ is a method to separate compounds based on their relative solubilities in two different immiscible liquids‚ usually water and an organic solvent. It is an extraction of a substance from one liquid into another liquid phase. Liquid–liquid extraction is a basic technique in chemical laboratories‚ where it is performed
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S OUTHEAST ASIAN J T ROP MED P UBLIC H EALTH ANTI-HEAD LICE EFFECT OF ANNONA SQUAMOSA SEEDS Junya Intaranongpai 1‚ Warinthorn Chavasiri 2 and Wandee Gritsanapan 1 1 Department of Pharmacognosy‚ Faculty of Pharmacy‚ Mahidol University‚ Bangkok; Department of Chemistry‚ Faculty of Science‚ Chulalongkorn University‚ Bangkok‚ Thailand 2 Abstract. The present study focused on the separation and identification of the active compounds against head lice from the hexane extract of Annona squamosa
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the victims’ bodies. These fibers were yellowish-green nylon and violet acetate. A criminalist must obtain a physical match of nonexistence‚ and the examiner must resort to a side-by-side comparison of standard or reference and crime scene fiber. (Saferstein‚ 2015) The most important step in the examination of fiber is a microscopic comparison of color and diameter using a microscope. The yellowish-green nylon and violet acetate fibers were generally similar to each other in appearance and properties
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treatment with caustic soda‚ embossing‚ or weaving (usually with thickerwarp yarns and thinner filling yarns). Although crepe is traditionally woven‚ crepeyarns are now used to produce knit crepes. SATIN One of the basic weaves. A shiny‚ smooth silk‚ acetate‚ rayon‚ or other man-made fiber combination woven in satin weave made with a cotton filling. It has a smooth‚ lustrous surface because the warp floats. It is used for linings of coats‚ jackets‚ facings‚ and ties. It is also used for draperies‚ upholstery
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Mechanism: Side Reaction: Experimental: Table of Chemicals: Cyclopentadiene Maleic Anhydride Ethyl Acetate Hexane 66.10 g/mol 98.06 g/mol 88.11 g/mol 86.18 g/mol MP: -90º C BP: 39-43º C MP: 52.8º C BP: 202º C MP: -83.6º C BP: 77.1º C MP: -96--94º C BP: 68-69º C Cyclopenta-1‚3-diene Furan-2‚5-diene Ethyl Acetate Hexane Results: The crystals obtained through the Diels-Alder reaction were not plate-like‚ as were expected. We obtained
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rotundus was evaluated for its hepatoprotective activity in rats by inducing liver damage with carbon tetrachloride. The ethyl acetate extract which was administered orally at a dose of 100 mg/kg exhibited significant protective effect by lowering serum levels of the liver enzymes such as alanine aminotransferase (ALT or SGPT)‚ aspartate aminotransferase (AST or SGOT)‚ alkaline phosphatase
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boiling points of two different substances are very different. Fractional distillation is the separation of a mixture of multiple components into its various fractions according to the difference in their boiling temperatures. a.) Hexyl acetate and butyl acetate- Simple distillation should be used for these two compounds because their boiling points are very different. b.) Hexanol and cyclopentanol- Fractional distillation should be used because there is a small difference of boiling points between
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