fibre cells are narrow and hollow‚ with thick walls made of cellulose. They are pale when immature but later become hardened and yellowed as a layer of lignin is deposited on their walls. There are two varieties of coir. Brown coir is harvested from fully ripened coconuts. It is thick‚ strong and has high abrasion resistance. It is typically used in mats‚ brushes and sacking. Mature brown coir fibres contain more lignin and less cellulose than fibres such as flax and cotton and so are stronger but
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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
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MACROMOLECULES OF LIFE DEFINITIONS INORGANIC CHEMISTRY A branch of chemistry which studies the structures‚ synthesis and reactions of compounds other than HYPERLINK http//searchbox.hyperdictionary.com/dictionary/hydrocarbons t _blank hydrocarbons and their derivatives ORGANIC CHEMISTRY A branch of chemistry that deals specifically with the structures‚ synthesis and reactions of carbon-containing compounds. CHEMICAL BONDS When two or more atoms are bonded together to form new and more complex aggregates
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Biology 12 Introduction to Biochemistry Study Guide Kiki Dhaliwal Period: 7 September. 19/2013 10. Atom: Smallest particle of an element that displays the properties of that element. 11. See page 12. a) Ionic bonds are chemical bonds in which ions are attracted to each other by opposite charges. b) Covalent bonds are chemical bonds in which atoms share one pair of electrons. c) Hydrogen bonds are weak that aries between a slightly positive
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Alpha amylase is an enzyme that aids in the breakdown of starch and glycogen to form glucose and maltose through the hydrolyses of alpha linked polysaccharides1. Starch is a complex carbon and is the main energy storage material found in plants and some bacteria. It is a major component of food as it supplies plants with energy and carbon. Starch consists of two types of polysaccharides called amylose and amylopectin1.The properties of starch can depend on the number of alpha 1‚4 glycosidic bonds
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by the hand spinners are wool from domestic sheep and silk. One of the most popular animal fiber is Angora. There are two types of angora: Mohair(which is made from angora goat) and Angora Rabbit Hair(which is made form Angora Rabbit). Cellulose Fibers are fibers from some plant or plant based materials and they are usually categorized by the part of the part the plant that is being used which is: seed‚ stem‚ and leaf. |Fiber |Source |Advantages
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· tear newspaper into strips· HINT: always make the last layer of mache with white computer paper or paper towel so that painting is easier. It takes FAR less paint. If you don’t do this‚ consider priming the project with white acrylic paint before you let the kids at it with the poster paint· Make paper mache paste (there are many different options): · OPTION 1: 3/4 white glue to 1/4 water (or if using a good‚ thick glue‚ like elmers you can do 1/2 and 1/2) · OPTION 2: COOK METHOD: 1 part
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hexose sugar (six carbons) most commonly found in this ring structure. Glucose will be known to most students as a product of photosynthesis or the substrate molecule for respiration. Glucose is also found in a polymer as starch‚ glycogen or cellulose. All bonds are covalent. Glucose is a reducing sugar and will give positive (Brick red) precipitate in a Benedicts test. Glucose is metabolically active compound Glucose is soluble and has osmotic effects when in solution This is an
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Movement in and out of cells Diffusion: (mixing molecules) Molecules and ions in a liquid or a gas move continuously. The movement is quite random‚ and the particles change direction as they bump into one another. The particles collide more often when they are close together (when they are concentrated) and so they tend to diffuse‚ or spread out‚ until they are spaced evenly throughout the gas or liquid. The random movement of particles is due to their own kinetic energy. When the diffusion
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What are the roles of digestive enzymes? Digestive enzymes help break down certain foods like how lipase enzymes help digest fats and how protease enzymes break down proteins. Also amylase enzymes break down carbohydrates and cellulose enzymes help break down cellulose molecules into simple sugars. There are 4 different digestive enzymes all with different purposes to help achieve the one goal. Without these enzymes it would be extremely difficult to break down certain types of foods and
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