held together with covalent bonds involving single‚ double‚ and/or triple bonds‚ where a "bond" is a shared pair of electrons (the other method of bonding between atoms is called ionic bonding and involves a positive cation and a negative anion). Molecular geometries can be specified in terms of bond lengths‚ bond angles and torsional angles. The bond length is defined to be the average distance between the centers of two atoms bonded together in any given molecule. A bond angle is the angle formed
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found in all living organisms. Constructing DNA models is a great way to learn about DNA structure‚ function and replication. DNA contains the genetic information for the reproduction of life. Its structure is that of a twisted double helix that is composed of long strands of alternating sugars and phosphate groups‚ as well as nitrogenous bases (adenine‚ thymine‚ guanine and cytosine). The basic unit of structure for a DNA molecule is the nucleotide. A nucleotide is composed of a phosphate‚ a deoxyribose
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Lab 2 Report for MATSE 473 Determining Molecular Weight using Solution Viscosity Name: Mengfang Li Group D Lab Partners: Michael Lorenzo‚ Peter Mcclure 01/24/2012 Introduction: This lab was designed to demonstrate the method to measure the intrinsic viscosity of the prepared polystyrene. Intrinsic viscosity‚ which is measured from the flow time of a solution through a simple glass capillary‚ has considerable historical importance for establishing the very existence of polymer molecules
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Justification for using a corporate business structure In today ’s competitive business environment‚ your choice of corporate structure could affect your business ’ long term success. A business entity can be structured in three ways‚ that being a sole trader‚ partnership or a company. Sole traders carry on business alone‚ thus leaving the owner with complete control of the enterprise and its employees‚ ownership of all profits‚ business assets and personal responsibility for all debts. It is
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the first time gene regulation was demonstrated 1910 Thomas Hunt Morgan was the first to recognise genes are carried on chromosomes: the basis for modern genetics. He demonstrated the existence of sex-linked genes and expanded trait linkage using "crossing-over" 1911 Alfred Sturtevant‚ mapped the locations of several fruit fly genes. This was the first genetic map 1926 Thomas Hunt Morgan published the "theory of the gene" based on Mendelian genetics 1933 A new technique
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INTRODUCTION Social structure and social interaction are integral in evaluating a person’s identity. Identities are the sets of meanings people hold for themselves that define “what it means” to be who they are as persons‚ as role occupants and as group members (PJB article) People are generally influenced by the norms and beliefs of society. A person’s identity is formed through a combination of factors derived from social structure (macrosociology) and social interaction (microsociology). The self
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Also known as: ethanoic acid‚ Glacial acetic acid‚ Ethylic acid‚ Vinegar acid‚ Acetic acid‚ glacial‚ Methanecarboxylic acid‚ Acetasol‚ Essigsaeure Molecular Formula: C2H4O2 Molecular Weight: 60.05196 Acetic acid is a weak acid which is probably most famous for being the primary acid in vinegar. In fact‚ acetic acid has a wide range of uses beyond sprinkling on salads‚ and it is produced in large volumes all over the world. People have been working with this acid in a number of contexts for
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shielding and penetration on AO energies • Bonding – Review VSEPR and Hybridisation – Linear combination of molecular orbitals (LCAO)‚ bonding / antibonding – Labelling of molecular orbitals (MOs) (σ‚ π and g‚ u) – Homonuclear diatomic MO diagrams – mixing of different AO’s – More complex molecules (CO‚ H2O ….) – MO diagrams for Transition metal complexes An introduction to Molecular Orbital Theory 6 Lecture Course Prof S.M.Draper SNIAMS Institute 2.5 smdraper@tcd.ie 2 Lecture
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Objective: 1) To test the presence of reducing sugars which is glucose in the Benedict’s test. 2) To test the presence of non-reducing sugars which is sucrose by using Hydrolysis then Benedict’s test. 3) To test the presence of the starch by using iodine test. 4) To test the presence of lipids in corn oils when using the Sudan Ш and Emulsion tests. 5) To test the presence of proteins in an egg albumen in the Biuret’s test. 6) To test the presence of Vitamin C and ascorbic acid in the DCPIP
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Introduction In these few years‚ molecular gastronomy has become a key topic and it is the new fashion for chefs to offer their customers. This is a new culinary trend called molecular cooking has been investigated as the most exciting development in haute gastronomy. Molecular gastronomy is refers to a modern style of cooking‚ which is a discipline practiced by both scientists and food professionals that studies the physical and chemical processes that occur while cooking. As well as it is the
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