LEE ET AL.: JOURNAL OF AOAC INTERNATIONAL VOL. 88‚ NO. 5‚ 2005 1269 DIETARY SUPPLEMENTS Determination of Total Monomeric Anthocyanin Pigment Content of Fruit Juices‚ Beverages‚ Natural Colorants‚ and Wines by the pH Differential Method: Collaborative Study JUNGMIN LEE U.S. Department of Agriculture‚ Agricultural Research Service‚ Pacific West Area (PWA)‚ Horticultural Crops Research Laboratory Worksite‚ 29603 University of Idaho Ln‚ Parma‚ ID 83660 ROBERT W. DURST and RONALD E. WROLSTAD Oregon
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Reminder: These notes are meant to supplement‚ not replace the laboratory manual. SN1 Reaction Notes Background and Application Substitution Nucleophilic First Order (SN1) reactions are one of the most common type of organic reactions. SN1 reactions can be used to make a wide variety of new compounds. In this experiment‚ t-amyl alcohol will be converted by a SN1 mechanism to 2-chloro-2-methylbutane. Safety Precautions Concentrated Hydrochloric Acid is 12M. It will cause visible destruction
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Work from home new mantra for IBM employees The last time Kumar‚ a sales executive working with IBM India‚ visited his company’s registered office in Bangalore was some six months ago to get his broken attendance card replaced. Kumar‚ 35‚ is among nearly 50‚000 IBM India employees who are working from anywhere‚ but the office. "I do not have to show my face to my boss anymore‚ well at least for a few weeks or months at a stretch‚" says Kumar‚ who requested that his first name not be revealed. "I
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Amanda Dundee BEANO CASE QUESTIONS 1. Harris’s partnership proposal is not fair for Smith. He completely revised the original investment amount and loan deal that they had original discussed. He is asking to raise his share to 49%‚ which would pose many problems for Smith in the control of the company. Giving Harris that high of a stake in the franchise would be giving him a lot more money‚ and half of the control. Smith would be dependent on Harris‚ and if something suddenly happened to
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Everyone has different stress triggers. Work stress tops the list‚ according to surveys. Forty percent of U.S. workers admit to experiencing office stress‚ and one-quarter say work is the biggest source of stress in their lives. Stress is actually a normal part of life. At times‚ it serves a useful purpose. Stress can motivate you to get that promotion at work‚ or run the last mile of a marathon. But if you don’t get a handle on your stress and it becomes long term‚ it can seriously interfere with
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Lab #5: Grignard Reaction – Synthesis of Triphenylmethanol John Kang Chem 152L Performed: 7/20/04 Date submitted: ________________ Lab Partners: Sang Lee‚ Vicky Lai TA: John Stanko Abstract: This experiment explored the synthesis of triphenylmethanol through the use of Grignard reagents. The percent yield of the product was 10% on a relatively humid day. The melting point was calculate to be 127.2oC with a literature value of 162oC. An IR spectrum of the product was taken and used
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and destructive routines of human expansion. Artic wildlife is experiencing the most difficulties as the surrounding glaciers are all melting. Our primary focus is on polar bears as they rely on masses of ice to rest after hunting for food. With the emergence of warmer climate‚ the areas of ice are diminishing leaving polar bears swimming for even longer until they drown from exhaustion. A federal regulation was passed in May of 2008 to protect the polar bear species from extinction by adding them
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Chemical Reaction Lab Well #1 CuCl2 + Al (shot) - Bubbling - Turning reddish-maroon - 33oC Well #2 CuCl2 + Al (foil) - Bubbling‚ but less than well #1 - Turning black - 28oC Well #3 CuCl2 + Zn - Turned black then red - No bubbling - 29oC Well #4 CuCl2 + NH4OH - Cloudy - No bubbling - 26oC Well #5 CuCl2 + NaCO3 - Not mixing with CuCl2 - Heterogeneous - 25oC Well #6 CuCl2 + AgNO3 - Cloudy - Top layer is white -29oC 1. The more pronounced reaction was the aluminum
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Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to not-so-shiny strips that are stained with dark‚ reddish-brown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after
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CBSE TEST PAPER-03 CLASS - X (Chemical Reactions and equations) 1. Take about 5 ml of dil. HCl in a test tube and add a few pieces of fine granules to it. Which gas is evolved? (a) Chlorine (b) Hydrogen (c) HCl (d) Nitrogen 2. Dissolving suger is an example of(a) Physical change (b) Chemical change (c) Redox Reaction (d) None of these. 3. Heat is evolved diving (a) Endothermic Reaction (b) Displacement Reaction (c) Combustion Reaction (d) Combination Reaction 4. Which of the following is not a balanced
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