Experiment 1: Isolation of Casein from Milk * pH of milk – 6.6 * milk = 87.1% water‚ 4.9 % CHO 3.9 %‚ fats‚ 0.7% minerals Experiment 2: Protein Hydrolysis and Characterization | Reagents | Principle | Test for | Positive Result | Negative Result | Biuret | CuSO4‚ NaOH | Complexation of Cu+2 with amide N atoms | Polypeptide bonds | Violet/purple solution | Blue color solution | Sakaguchi | 10% NaOH‚ 0.02% α-naphtol solution‚ 2% NaOBr | arginine condenses with α-naphtol and NaOH
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intermolecular forces are van der walls & hydrogen bonds. • Ionization energy- E is required to remove an e- • Electronegivity- desire for electrons highest closer the the right • Highest ionization energy is helium • Potassium bromine the element bromine forms an anion • Alkali metals +earth metals conduct electricity • Covalent bonds form when 2 elements with high electroneg share a pair of electrons • Covalent compounds- 2 elements with high electroneg bond • In nature
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Bromocyclohexane This reacted in 10 seconds because bromocyclohexane is secondary bromine‚ and has steric strain‚ since it is a cyclic compound. The bigger steric in a molecule‚ the harder it is for the nucleophile to attack the leaving group (-Br) from the opposite sides‚ therefore‚ SN2 reaction is slower than SN1 for bromocyclohexane Bromocyclopentane This reacted instantly because bromocyclopentane is secondary bromine‚ and have bigger steric strain than bromocyclohexane‚ since it is a cyclic compound
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bath to keep the reaction under control‚ and then sulfuric acid was added to the cold mixture. The sulfuric acid allowed for the metal in this case sodium to dissociate from the bromine atom allowing it to have a negative charge. The positive cation left on the carbon that lost the alcohol will be replaced by the bromine ion‚ creating 1-bromobutane. The lab students had to understand the basic separation techniques to conduct this lab safe and effectively. They had to setup a simple distillation
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Homework 1 (Ch. 1-2) 1. Make five qualitative and five quantitative observations about the room in which you now sit. a. Quantitative i. Have 1 desk ii. Have 2 monitors iii. Have 6 pillows on my bed iv. Dresser has 5 drawers v. Have 1 TV b. Qualitative i. Desk is steel and sturdy glass ii. Monitors are black and made manufactured by Dell iii. Pillows are filled with cotton or goose features iv. Dresser is made of a dark wood v. TV was purchased at Best Buy and was manufactured by Samsung 2. Describe
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variation of ozone results from the slow The ozone layer can be depleted by free radical catalysts‚ including nitric oxide (NO)‚ nitrous oxide (N2O)‚ hydroxyl (OH)‚ atomic chlorine (Cl)‚ and atomic bromine (Br). While there are natural sources for all of these species‚ the concentrations of chlorine and bromine have increased markedly in recent years due to the release of large quantities of man-made organohalogen compounds‚ especially chlorofluorocarbons (CFCs) and bromofluorocarbons.[4] These highly
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insoluble in alcohol‚ ether and acetone (organic solvents). 2.3 Melting Point 3. Chemical Properties of Tannins Expected Actual a). Ferric chloride Brownish green (+) Brownish green b). Gelatin Formation of precipitate (+) Green precipitate c). Bromine Brownish orange (+)
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conjugation which will stabilise the molecule. The mechanism for this step is unlikely to go via a simple elimination as for an elimination the eliminated products must be trans to each other for facile leaving. As the bromine is equatorial in both the chair and the boat conformation the bromine is trans with neither of the hydrogens which shows this type of elimination is unlikely to occur. The other possibility is that the acidic hydrogen that is removed in the first step is not H4‚ but H2. This
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agent to ensure that pure cyclohexene was obtained‚ calcium chloride works by binding itself to the water molecule thus removing it in the process. After the dehydrating process was completed‚ a few tests using Potassium Permanganate solution and Bromine which were purple and Reddish-Orange respectively was conducted. The tests showed a positive result which indicated that the product was indeed pure cyclohexene. As a result of this‚ it was concluded that the activity was indeed a success as cyclohexene
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Great Lakes: Great Decisions By: Judy Webb Professor Natalie Marsh Business Administration Capstone – BUS 499 January 12‚ 2011 Perform an analysis of the Social/Demographic‚ Technological‚ Economic‚ Environmental/Geographic‚ and Political /Legal/Government segments to understand the general environment facing Great Lakes. Describe how Great Lakes will be affected by each of these external factors. Social/Demographic Segments – The primary consumers of the products produced by
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