domains (reviewed in refs. 1–5). The aliphatic domain (aliphatic suberin) consists of a glycerol-based fatty acid derived polyester that‚ on trans-esterification‚ releases small amounts of p-hydroxycinnamic acid (mainly ferulic) together with aliphatic monomers and glycerol.6 The aromatic domain is a lignin-like polymer of oxydatively cross-linked phenolics.7 Generally‚ but not always‚ suberin contains a certain amount of soluble lipids or waxes embedded into the aliphatic polymer matrix.8‚9 Suberin and
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Lab #4 The Synthesis of Organic Polymers CHM2123‚ Section C October 21‚ 2014 Introduction: Organic polymers are macromolecules that are composed of smaller molecules called monomers. There are two main groups of polymers: natural polymers and unnatural (synthetic) polymers. Natural polymers include proteins such as cellulose and starch and are a necessity for our existence. On the other hand‚ synthetic polymers such as the polycarbonate in our lab goggles
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HOMEMADE BOUNCY POLYMER An Entry for the 2009 DIVISION SCIENCE FAIR TEAM CATEGORY CHINKEE MAE M. ALANZALON Grade VI – Jose Rizal DAN ALFONSO VALENTIN V. SORIA TRISHA KATE E. GENERAL Grade V – E. Aguinaldo Researchers Mr. MARK ANTHONY R. CUA Research Adviser Marcela Marcelo Elementary School Pasay City October 2009 CHAPTER 1 INTRODUCTION One might think that chemists are a bunch of boring scientists who wear lab coats and look at beakers all day‚ but did you know that many toys you play with
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abundant elements in living organisms. These elements are held together by covalent bonds‚ ionic bonds‚ hydrogen bonds‚ and disulfide bonds. Covalent bonds are especially strong‚ thus‚ are present in monomers‚ the building blocks of life. These monomers combine to make polymers‚ which is a long chain of monomers strung together. Biological molecules can be distinguished by their functional groups. For example‚ an amino group is present in amino acids‚ and a carboxyl group can always be found in fatty
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molecules. List from memory the electronegativity of carbon‚ nitrogen‚ oxygen and hydrogen. Summarize how polymers are made and broken down and how water participates in these reactions. List the different kinds of biological macromolecules and their monomers. Describe the structure and functions of: Amino acids Simple sugars Nucleotides Summarize the different forms and functions of complex carbohydrates. Describe the possible levels of protein structure. Summarize the fundamental property of
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JOSEPHINE F. KHONGHUN SPECIAL EDUCATION CENTER WAWANDUE‚ SUBIC‚ ZAMBALES 4TH Prelim Test in ADVANCED CHEMISTRY NAME: SCORE: YEAR AND SECTION: DATE: I. MATCHING TYPE. Match column A with column B. Write the letter in Column B that matches the item in Column A on the space provided. ( 1 pt each) A. B. ______1. Deposits of organic materials A. petroleum ______2. Complex mixture of hydrocarbons principally alkanes
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bus 9.2 – Production of Materials: Δ. Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: • Basic reactions to remember: – Acid reactions: ▪ acid + base [pic] salt + water HCl(aq) + NaOH(aq) [pic]NaCl(s) + H2O(l) ▪ acid + metal [pic] salt + hydrogen gas HCl(aq) + Mg(s)[pic]MgCl2(s) + H2 (g) ▪ acid + carbonate [pic] salt + carbon dioxide gas + water HCl(aq) + CaCO3(s)[pic] CaCl(s) + CO2(g) + H2O
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flow index. Introduction: Polymers are an important class of materials. The range of properties of polymeric materials allows it to be essential in everyday life. The simplest polymer is polyethylene which consists of long chains of C2H4 monomers. Each monomer is joined by a covalent bond while the bonding between the chains is a weak van der Waals bond. The weakness of the van der Waals bond is the source for the properties of polyethylene. An extrusion plastometer will be used to measure the
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A Macromolecule is a molecule with a very large number of atoms .The word macromolecule is usually used for describing polymers. Molecules that are made up of smaller molecules are called monomers‚ there are also Organic Molecules composed of carbon atoms .The functions of the Four big Macromolecules: First‚ Carbohydrates‚ carbohydrates is the function of being used for energy production during cellular respiration. Second ‚ Lipids‚ lipids are used for four things; insulation and long-term energy
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AS Biology‚ Biological Molecules Revision Notes Distinguish between monomers and polymers: Monomers- Identical small molecules. Polymers- Chainlike molecules formed from the linking together of many similar. Distinguish between monosaccharides‚ disaccharides‚ and polysaccharides: Monosaccharides- Simple sugars; sugar molecules may be enantiomers due due to the spatial arrangement of parts around asymmetric carbons; raw material for synthesis of other organic molecules. Disaccharides-
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