Starch Glycocidic Bond A glycocidic bond is a link between two sugar molecules‚ it holds monosaccharides together to form disaccharides or polysaccharides. It can also join carbohydrates to non-carbohydrate molecules. A glycocidic bond is a condensation reaction which means when it is formed‚ water is a product. This also means that the bond needs water to break (Hydrolysis) which makes it quite strong. This kind of bond is called covalent. Glucose + Sucrose + Water Glucose = H2O Monosaccharides
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Gawande (Corresponding author) Departamento de Química‚ Faculdade de Ciências and Tecnologia Quinta da Torre‚ 2829-516 Caparica‚ Portugal E-mail: mbgawande@yahoo.co.in‚ m.gawande@fct.unl.pt Abstract A new one-pot and efficient three-component condensation of aldehydes‚ ketones‚ and amines in the presence of MgO/ZrO2 as an inexpensive and effective catalyst for the synthesis of β-amino carbonyl compounds by Mannich reaction is described. The present methodology offers several advantages‚ such as
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Unit 1: Biochemistry Review Chemical Bonding Three types of bonds Ionic bond: 2 oppositely charged atoms (Na and Cl) Polar covalent: Unequally shared electrons (H and O) Non polar covalent: Equally shared electrons (C and C) or similar electronegativity Electronegativity and chemical bonding Electronegativity is a measure of the strength in which an atom can attract electrons. A difference of < 0. 5 is non polar covalent bond A difference of 0.5 – 1.7 is polar covalent bond A difference of > 1
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atmosphere‚ and an even smaller amount of the Earth’s freshwater (0.003%) is contained within biological bodies and manufactured products. Water on Earth moves continually through the water cycle of evaporation and transpiration (evapotranspiration)‚ condensation‚ precipitation‚ and runoff‚ usually reaching the sea. Evaporation and transpiration contribute to the precipitation over land. Safe drinking water is essential to humans and other lifeforms even though it provides no calories or organic nutrients
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Discussion and Interpretation of Results The addition of HBr to 1-hexene created a 2-bromohexane‚ as indicated from the ethanol silver nitrate test and sodium iodide/acetone test. The observations when the product was subjected to these tests were similar to what were observed with the 2° bromide compound. When subjected to the silver nitrate test‚ the product produced a precipitate at the same rate of the 2° bromide compound‚ and the product produced a hue of yellow that was also similar to the
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Running head: Organic Chemistry Tamanna Ashraf Palm Beach State College Principle of Chemistry Ceravolo‚ Joseph MW 11:00am-12:15pm February 6th‚ 2011 We all are living in a science world. Everything has some kind of reaction going on in our living area. It is just we do not get to see or realize that where n how we having our life much easier than it used to be. In these writing assignments‚ the topic is about the organic chemistry. In organic chemistry‚ we all have different kinds of compounds
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When Was The Moon Formed? We technically don’t know when the moon was formed but scientist guess it was formed 4.5 billion years ago. Different Theories and Hypothesis Fission Theory One theory is that the moon must have broken away from Earth‚ when the earth was still a rotating ball of molten rock. Earth might have been spinning so fast that part of our planet separated into space‚ this could be why our chemical composition is similar to the moon. Fission theorist stated that the Pacific ocean
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in: Proc. of 1993 ASME Winter Meeting‚ New Orleans‚ LA‚ 1993. Cavallini‚ A.‚ Censi‚ G.‚ Del Col‚ D.‚ Doretti‚ L.‚ Longo‚ G.A.‚ Rossetto‚ L. Condensation of halogenated refrigerants inside smooth tubes. HVAC R. Res. 8‚ 429–445‚ 2002. Dalkilic‚ A.S.‚ Agra‚ O.‚ Teke‚ I.‚ Wongwises‚ S. Comparison of frictional pressure drop models during annular flow condensation of R600a in a horizontal tube at low mass flux and of R134a in a vertical tube at high mass flux. Int. J. Heat Mass Transfer 53‚ 2052–2064‚ 2010
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QUALITATIVE TESTS OF CARBOHYDRATES Final Lab Report Submitted by Brittany Fitzgerald 545301 Prepared for Nancy Cook Chemistry 3501 Monday November 26‚ 2012 RESULTS PART A: As a result of the Benedict’s test on various sugar solutions‚ it was found that galactose‚ mannose‚ arabinose‚ ribose‚ lactose‚ fructose‚ maltose‚ and cellobiose tested positively and therefore are considered reducing sugars. Glucose‚ starch‚ sucrose‚ and methyl-D-glucopyranoside on the other hand tested
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bonds | E. | oligosaccharides; glycosidic linkages | Answer choice C Which of the following statements about starch is false? A. | Starch may be partially branched. | B. | Starch is a polymer of glucose. | C. | Starch is formed by the condensation of monomers. | D. | The properties of starch are very similar to those of cellulose. | E. | Starch may be digested by people. | Answer choice E Which of the following characteristics distinguishes carbohydrates from other macromolecule types
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