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Free research essays on topics related to: polymer

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  • Sheet Of Cellulose Nitrate Sheet Of Cellulose Polymers
    571 words
    Polymers have been around longer than we have. In fact, polymers are as old as life itself, as all life on earth is based on three types of polymers, namely DNA, RNA, and proteins. But this report is about some of the earliest synthetic polymers, that is, polymers made by humans, specifically, the cellulose derivatives. The very first synthetic polymer was of course leather, a modified natural polymer, an artificially crosslinked form of the proteins found in animal skins. Leather tanning was di...
    Free research essays on topics related to: cellulose, nitrate, derivatives, polymers, polymer
  • House To House Plastic Bottles
    1,074 words
    Plastics are organic polymeric materials consisting of giant organic molecules. Plastic materials can be formed into shapes by one of a variety of processes, such as extrusion, moulding, casting or spinning. Modern plastics (or polymers) possess a number of extremely desirable characteristics such as high strength to weight ratio, excellent thermal properties, electrical insulation, resistance to acids, alkalis and solvents, just to name but a few. Plastic is a man-made product, which is compose...
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  • Shown In Figure Molecular Weight
    1,009 words
    The ready market availability of porous membranes with cylindrical pores of 15 - 200 nm and a thickness of 6 - 10 'im facilitates the development of three dimensional analytical unit operation devices on an atta Liter scale. By employing these membranes as gates at the interface of two crossed microfluidic channels, the rate and direction of the fluid exchange can be controlled with electrical potential, polarity, solution ionic strength or diameter of the nano capillary 1. The microfluidic chan...
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  • Gram Positive And Negative Bacteria
    828 words
    Gram Positive and Gram Negative Bacteria It is a well-known fact that bacterial cells, like plant cells, are surrounded by a cell wall. However, few people know that their cell walls are quite different. Bacterial cell walls are made up of polysaccharide chains linked to amino acids. At the same time, plant cell walls are made up of cellulose, which contains no amino acids. In the same way, bacterial cell walls themselves differ from one another. Scientists distinguish two types of bacteria cell...
    Free research essays on topics related to: gram positive, plasma membrane, cell wall, amino acids, gram negative
  • Support For Large Segments Support For Large Polymers
    922 words
    Biodegradable polymer sutures Biodegradation: A biological agent (an enzyme, microbe or cell) responsible for degradation. Most degradable polymers are polyesters. Polymers prepared from glycolic acid and lactic acid have found a multitude of uses in the medical industry, beginning with the biodegradable sutures first approved in the 1960 s. Since that time, diverse products based on lactic and glycolic acid and on other materials, including poly (dioxanone), poly (trim ethylene carbonate) copol...
    Free research essays on topics related to: degradation, acid, bone, lactic acid, polymers
  • Structure Of Dna Residues
    311 words
    In the early 1950 s, the structure of DNA had become a crucial puzzle, following the discovery that DNA and not protein was the transforming principle. The puzzle was more intriguing because of the challenge of figuring out how a polymer composed of only 4 different letters could encode for a polymer such as proteins that are composed of 20 different letters. DNA is an acid, owing to the phosphate groups between each deoxyribose. The salt of DNA is the form in which some of the hydrogen ions hav...
    Free research essays on topics related to: complementary, dna, residues, polymer, phosphate
  • Epi Chlorohydrin Potting Compounds Epoxy
    321 words
    The group of synthetic resins called epoxies produce the strongest adhesives in current use, as well as plastics and corrosion-resistant coatings. Epoxy adhesives are thermosetting; that is, after initial hardening, they cannot be remelted by heat. They have excellent resistance to solvents and weathering agents, and high electrical and temperature resistance. Their adhesion to almost any type of surface including metal, ceramic, wood, and fabrics unmatched. Epoxies are usually made by reacting ...
    Free research essays on topics related to: resistance, plastics, epoxy, metal, curing
  • Fiber Optic Cable Fiber Optics
    1,613 words
    The world of fiber optic technology seems to be new. While in actuality it dates back to the 1800 s. It was primitive but it was a form of fiber optic. In this paper I will be telling you what a fiber optic cable is made of, how a fiber optic system works and a history of fiber optics from the 1800 s to today. Lets take a look at the optical fibers, what these fiber do is carry the light which is transmitted to the destination. Now we will look at what a cable is made of. A cable is made up of f...
    Free research essays on topics related to: copper wire, mode fiber, fiber optics, single mode, fiber optic cable
  • Du Pont High Strength
    971 words
    The History of Kevlar Kevlar is an organic fiber in the aromatic polyamide family. It has unique properties and a chemical composition that is its own, which distinguishes it from other man-made fibers. Kevlar is a combination of high strength, high modulus (resistance to extension), toughness and thermal stability. Kevlar has a wide range of uses. In the 1960 s nylon and polyester opened the door for man-made fibers. They were cutting edge fibers in their time but to achieve maximum break stren...
    Free research essays on topics related to: high strength, m 2, du pont, man made, 2 g
  • Institute Of Technology Nobel Prize
    1,224 words
    Material science is the study of the properties of solid materials and how those properties are determined by a material s composition and structure. Most engineers have the primary function of relating the design and production of machinery and components. Materials science and engineers are involved with all aspects of engineering and provide the best material for a large variety of applications. In the workplace materials science and engineers can specify, test, and qualify the materials used...
    Free research essays on topics related to: conductive, nobel prize, polymers, engineers, institute of technology
  • Liquid Crystal Natural Polymers Polymer
    415 words
    Polymers are large molecules composed of smaller molecules called monomers. Monomers are produced and either grow together or are assembled to produce a single polymer. There are synthetic and natural polymers. Some examples of natural polymers would be wood, starches, fingernails, and hair. Synthetic polymers are usually referred to as plastics. Petroleum, is the primary monomer used to produce polymers. An English chemist named Alexander Parkes was the first scientist to produce the first synt...
    Free research essays on topics related to: liquid, polymers, composite, polymer, synthetic
  • Order To Prevent Benjamin Franklin
    970 words
    Do you even know how to determine whether or not currency is counterfeit? According to the Federal Reserve, Because US currency is universally accepted and trusted, it is widely counterfeited. Many people have attempted to copy the patterns of US currency in an effort to create their own counterfeit money. Therefore, everyone should have a basic knowledge of the safety features of money in order to protect yourself from getting counterfeit bills and risk losing any money. Recently, new safety fe...
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  • Due To The Fact Hydrogen Bonds
    1,126 words
    Properties of Cellulose Cellulose is a complex carbohydrate, or polysaccharide consisting of 3, 000 or more glucose units. The basic structural component of plant cell walls, cellulose comprises about 33 percent of all vegetable matter (90 percent of cotton and 50 percent of wood are cellulose) and is the most abundant of all naturally occurring organic compounds A natural polymer made up from D-glucose (C 6 H 12 O 6) monomer units, cellulose contains glucose units which link together to form lo...
    Free research essays on topics related to: b d, hydrogen bonds, figure 1, carbon atom, due to the fact

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