Lab #3: Ion Exchange Chromatography Objective The purpose of this experiment was to separate proteins on the basis of their net charge at a particular pH. In cation exchange chromatography positively charged molecules are attracted to a negatively charged column. Conversely‚ in anion exchange chromatography‚ negatively charged molecules are attracted to a positively charged column. Experimental results could be monitored in a predictable way by controlling running pH‚ salt concentration‚ and by
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The Nervous System II: Ion Channels 1. List four neurotransmitters that bind to ion channels‚ these neurotransmitters are called __directly____-acting neurotransmitters. a. ACh b. glutamate c. GABA d. Glycine 2. a. The binding of ACh opens ion channels in the dendrites or cell body that permits both _sodium______ and _potassium____ to move through them. b. Which ion would move into the cell? _sodium____out of the cell? _potassium_____________ c. Which ion has the greatest electrochemical
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for Experiment #7 Student’s Name __________Lisa __________ Date of Experiment _08/03/2013__________ Date Report Submitted ______08/05/2013___________ Title: Identification of Metallic Ions Purpose: To perform and observe the flame tests of some alkali and alkaline earth metal ions. Understanding Light Introduction: Electrons from an atom can absorb energy and become excited to move from the stable “ground state” energy level to a higher energy level. Imagine one of
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Kinetics Introduction Nivaldo J. Tro describes kinetics as the study of how changes that occur in chemical reactions take place over time‚ and because of its vast utilization in a multitude of industries‚ it may be one of the most significant and fascinating aspects in the entire chemical world. One application of the study of kinetics can be applied to the determination of the rate of a chemical reaction involving a certain selection of chemicals (FD&C Blue #1 and sodium hypochlorite). The
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The Eight Piece 18V 3.0Ah Li-Ion Cordless Combo Kit (DLX8010) is a large all-in-one kit from Makita. The kit includes eight different high-end tools‚ as well as batteries‚ a charger‚ and a large duffel bag to carry everything. It includes everything you need to start or significantly bolster your collection of high-quality power tools. Including a Hammer Driver Drill‚ a Circular Saw‚ a Rotary Hammer‚ and Five Other power tools in addition to the included bag and accessories. It seems like an incredible
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Kinetics of an SN1 reaction: the effect of solvent on rate Object The purpose of this experiment is to determine the rate of hydrolysis in acetone/water (50/50 v/v and 60/40 v/v). Background and Theory An SN1 reaction of tert-butyl chloride takes place in two steps. First‚ the Alkyl Halide will leave the molecule. In this step the bond is breaking‚ which takes a longer amount of time‚ so it will determine the rate of the reaction. As a result‚ it forms a tertiary carbocation‚ since this
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wound healing and recovery especially in severely wounded patients. One of the approaches for treating wounds is the use of biocompatible composites incorporated with antibacterial agent to improve wound healing and diminish the wound infection risk 2. Ion-exchange zeolite has gained attention due to its renewable nature‚ good biocompatibility and excellent
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Summary This experiment will measure the rate of oxidation of iodide ions by persulphate ions to derive the rate law for the reaction. Starch will be added to the reaction to facilitate the measure of time during the reaction. The reactant solutions will contain (NH4)2SO4 and KI‚ represented as: (NH4)2S2O8 + 2KI -> I2 + (NH4)2SO4 + K2SO4 This can be simplified to: S2O82- + 2I- -> I2 + 2SO42- These equations can only be carried out and be visible after the iodine has completely
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Determination of Calcium ions in milk using titration. Background Calcium is a mineral which is essential to the human body. In fact 1.5% of the human body is made up of calcium‚ and not just the obvious uses such as bone and teeth formation but it is also a vital factor in many enzyme reactions‚ for example blood clotting. It also partakes in the regulation of the hearts rhythm. Lack of the crucial mineral can result in the build up of cadmium and lead‚ both of which are toxic. along
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absorbs 2. Cuvette – a small tube closed at one end‚ which serves as a sample holder for Spectroscopic experiments 3. Complexes – ions containing metals bonded to its molecules or other ions; reactions of these are called Complexation 4. Spectrum – electromagnetic radiation either emitted or absorbed by substances 5. Ligand – the species that binds to the metal ions III. Introduction When light interacts with matter‚ the structures and properties of atoms and molecules are determined
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