This video is just a experiement me and my friends did for our Analytical Chem experiment at Kwantlen Polytechnic Uinversity. What I wanted to show was some of the stuff that happens in a chem lab to people or students who havn’t seen stuff in a lab before. In the first part of the video, i want to show what happens when you drop a piece of dry ice in a beaker full of hot water. As everyone can see, it immediatly sublimes. In the second part of the video, we are performing the experiement for that day. We are extracting Limonene oil from Orange rinds( orange zest for thoughs cooks out there). First, we fill a tube with a copper mesh on the bottom half with the rind and the rest with compacted, crushed dry ice. The sealed tube is placed in the hot water so that the ice can begin to sublime. As the pressure builds, the ice can no longer sublime anymore. Instead, the pressure causes the ice to melt in to liquid carbon dioxide, and boil on contact with the rinds. Almost like liquid nitrogen, but warmer. As the liquid goes through the rinds, it picks up the oil, and anyother oils in the rinds, and brings them down to the bottom of the tube. This is a similar technique some companies use to decaff coffee with out using harmful solvents. Just as a note, there is no mixer in the graduated cylinder, the tube is spinning on its own This video was shot with my blackberry, so i know that the video quality is crappy and the audio isnt very good.
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Freshman Organic Chemistry (CHEM 125) The chemical mode of action of omeprazole is expected to be insensitive to its stereochemistry, making clinical trials of the proposed virtues of a chiral switch crucial. Design of the clinical trials is discussed in the context of marketing. Otolaryngologist Dr. Dianne Duffey provides a clinician’s perspective on the testing and marketing of pharmaceuticals, on the FDA approval process, on clinical trial system, on off-label uses, and on individual and institutional responsibility for evaluating pharmaceuticals. 00:00 – Chapter 1. Introduction: The Chemical Properties and Reactivity of Prilosec 06:58 – Chapter 2. The Economics of Clinical Trials 19:57 – Chapter 3. Duffey: How Do I Know that the Drug is Effective? 30:26 – Chapter 4. The Phases of Clinical Trials, Results for Esomeprazole and Omeprazole, and Off-Label Use 42:01 – Chapter 5. Pharmaceutical Marketing Mentality and Q&A Complete course materials are available at the Open Yale Courses website: open.yale.edu This course was recorded in Fall 2008.
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