monomer and polymer. M-Monomers are small molecules which may be joined together in a repeating fashion to form more complex molecules called polymers. P- A polymer may be a natural or synthetic macromolecule comprised of repeating units of a smaller molecule. 5. Describe dehydration (condensation) and hydrolysis reaction. Include a diagram to illustrate both 6. What’s the biological relevance of dehydration and hydrolysis reactions ― that is of being able to assemble polymers from monomers
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INTRODUCTION In this lab‚ we will be measuring the viscosity of samples of polyvinyl alcohols in order to determine the molecular mass of their components. Polyvinyl alcohol is an example of a synthetic polymer‚ which is a macromolecule. The general chemical structure of such compounds are well-characterized‚ although variation in characteristics such as molar mass‚ chain length‚ and extent of branching are not obvious from merely looking at their molecular formula. There is also the complication
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conventional methods (trial and error). • By using molecular modelling‚ only molecules that fit with the active sites’ of the target are made and undergo clinical test. • Molecular modelling also used to design many other compounds like pesticides and polymers with specific characteristics. A Brief History of HIV-AIDS • Early on 1988 X-Ray Crystallography were used to determine the shape of HIV protease. • Discovery of a molecule that block its active site is a one step to the cure. • By
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MICROENCAPSULATION Microencapsulation: Definition: It is the process by which individual particles or droplets of solid or liquid material (the core) are surrounded or coated with a continuous film of polymeric material (the shell) to produce capsules in the micrometer to millimetre range‚ known as microcapsules. Microencapsulation (Cont.): Morphology of Microcapsules: The morphology of microcapsules depends mainly on the core material and the deposition process of the shell. 1- Mononuclear
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Engineers‚ Brookfield‚ CT. (1996). 7. J. L. Throne‚ Thermoforming‚ Carl Hanser Verlag‚ Munich (1987). 8. J. D. Ferry‚ Viscoelastic Properties of Polymers‚ John Wiley & Sons Inc.‚ New York‚ NY (1980). 9. V. Shah‚ Handbook of Plastics Testing and Technology‚ John Wiley & Sons Inc.‚ New York‚ NY (1984). 10. H. S. Kaufman J. J. Falcetta ed. Introduction to Polymer Science and Technology: An SPE Textbook‚ John Wiley & Sons Inc.‚ New York‚ NY (1977). Because DuPont cannot anticipate or control the many different
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their formation and function. Polymers are chains of monomers (atom or a small molecule that has the potential of chemically binding to other monomers of the same species) which link in various fashions (e.g. cross-link‚ linear linking) to form materials that are used constantly to help humanity’s comfort and existence thrive. An important innovation of chemical advances is a material known as Hydrogels. What are Polymers and Why Use Carbon and Silicon Atoms? Polymers are repeating chains of monomers
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Nuclear Malaysia have the only nuclear reactor in Malaysia‚ PUSPATI Triga Reactor (RTP). It was first used in 1982. Like other Triga reactor‚ it is used only for research and development‚ training and education. The first location we were taken was a polymer lab. At there‚ we learn about sago starch‚ tensile‚ impact and such more. Sago starch‚ an important agricultural commodity of Malaysia‚ can be radiation modified to improve its functionality‚ diversify its applications and increase value added sago
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the name of a binder and the name of a plastic into which it is made. Binders may be natural materials‚ e.g.‚ cellulose derivatives‚ casein‚ or milk protein‚ but are more commonly synthetic resins. In either case‚ the binder materials consist of very long chainlike molecules called polymers. Cellulose derivatives are made from cellulose‚ a naturally occurring polymer; casein is also a naturally occurring polymer. Synthetic resins are polymerized‚ or built up‚ from small simple molecules called monomers
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particles have been coated with dextran. To favor its adsorption‚ the polysaccharide was previously substituted with low concentrations of phenoxy groups. The amount of dextran adsorbed onto the PS-DVB surface was examined as a function of the polymer concentration‚ and various samples of beads‚ differing in surface dextran concentration‚ were prepared. The adsorbed polymeric layer was then chemically cross-linked and its stability was checked in the presence of sodium dodecyl sulfate. The hydrophiliccharacter
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Street‚ London W1T 3JH‚ UK Polymer-Plastics Technology and Engineering Publication details‚ including instructions for authors and subscription information: http://www.tandfonline.com/loi/lpte20 Thermal‚ Dynamic Mechanical‚ and Barrier Studies of Potassium Permanganate-LDPE Nanocomposites a a a Rahim Khosravi ‚ Seyed Ali Hashemi ‚ Seyed Alireza Sabet & Amir Masoud Rezadoust a a Department of Composite Engineering and Processing‚ Iran Polymer Institute‚ Tehran‚ Iran Version
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