The CELL The CELL Robert Hooke (1635-1703) Cork cells - the first person to see and name CELLS cces2013 (1665) 2 The CELL Robert Brown (1773-1858) - Discovered and named the nucleus (1833) cces2013 3 The CELL Matthias Jakob Schleiden (1804-1881) studied plant tissues and concluded that all plants are aggregates of individual cells which are fully independent (1838) cces2013 4 The CELL Theodore Schwann (1810-1882) studied animal tissues and concluded that all
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secreted from the tissues to lubricate the foods passage. Many of our foods are polymers‚ These are large complex molecules composed of long chains of monomers – small basic units. Proteins and some carbohydrate are polymers. In carbohydrates‚ the monomers are monosaccharides. They contain the elements carbon‚ hydrogen and oxygen. In proteins the monomers are called amino acids. They contain carbon‚ hydrogen‚ oxygen and nitrogen. The polymers in our food are insoluble so they cannot be directly absorbed
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realize that protein adhesives are different from other adhesives in two major ways. First‚ in chemical terms‚ most adhesives‚ whether synthetic or bio-based‚ are polymers made from one or a few monomers‚ usually with similar functionality. However‚ proteins are made from more than 20 amino acid monomers with side chains containing a variety of functional groups. Second‚ morphologically‚ adhesives generally can be well described by understanding their primary and secondary structures. However‚ soy
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Review 1: The Chemistry and Molecules of Life Please note that this is a general outline of some of the topics we will have discussed and are detailed in chapters 2-5 of your textbook. While this gives you an idea of some of the terms/phrases you are responsible for‚ not all the material we covered is included. You are responsible for everything discussed in class‚ but NOT for material in the book that was not addressed in lecture. Please do NOT assume that if you know the concepts/answers to the
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INTRODUCTION 1. INTRODUCTION The copolymerization of ethylene with 1‚ 3-butadiene to give crystalline‚ homopolymer-free‚ high molecular weight‚ substantially linear copolymer is described. Butadiene polymerizes almost exclusively in a trans-1‚ 4 structure‚ ranging in content from zero to 50 mole-%. At relatively low content of butadiene monomeric units (≤30 mole-%) X-ray crystallinity is of polyethylene type with a slight variation of the structural parameters. At higher levels of
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both types of polymerization in your answer. Nylon 66 is a step-growth polymer Step-growth polymerization‚ also known as condensation polymerization‚ eliminates one small molecule when two monomer units are joined together. Chain-growth polymerization‚ also known as addition polymerization‚ joins monomer units without loss of atoms. (Blackman et al. 2012) 2. Draw the repeat unit in polyvinyl alcohol (PVA) 3. What do you understand by the term ‘cross-link’? Draw the structure of slime
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point of performing treatment 2 (starch) versus treatment 3 (starch + amylase) -To determine whether fermentation will happen while sugar is in its complex‚ polymer form or only once broken down to its monomer units (glucose). Beaker 3 introduces the enzyme that breaks starch down to its monomer units. 4. What are the hypotheses for
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a neutral solution. b What general name is given to solutions that have many more hydrogen ions than hydroxide ions? Solutions that have many more hydrogen ions than hydroxide ions are termed acidic. 4 Name the monomers of carbohydrates‚ proteins‚ lipids and nucleic acids. The monomers (basic building blocks) of
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and Bulk Process Date: 1/17/2012 Introduction: This lab was designed to demonstrate the free radical polymerization of styrene using solution process and bulk process. It demonstrates specifically with the polymerization of styrene monomer to form polystyrene (PS). This lab was also intended to show the difference between solution process and bulk process and how it affects the yield and appearance of the final product. Polystyrene is a major polymer used for a wide variety
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Polymer Chemistry Classification of Polymers – Notes prepared by The most common way of classifying polymers is to separate them into three groups - thermoplastics‚ thermosets‚ and elastomers5. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. You may click on the words in the diagram below to learn more about these classifications. Thermoplastics Molecules in a thermoplastic are held together by relatively weak intermolecular
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