Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach‚ which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1‚2-diphenylethene)‚ two new chiral carbons are created from the sp2 carbons‚ therefore 3 different dibrominated stereoisomers are possible: meso-(1R‚2S)‚ or the raceminc mixture-(1R‚2R) or (1S‚2S)-dibromo-1‚2-diphenylethane (Gilbert‚ 2010). When the bromination ion intermediate proceeds
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932g Mass of crude dry trimyristin plus beaker 30.035g Melting point if isolated trimyristin 49*c Part B Mass of egg yolk sample 2.014g Mass of 50 mL beaker 30.708g Mass of isolated‚ dry cholesterol plus beaker 34.074g Color of 1% cholesterol solution (before) Clear Color of cholesterol extract solution (before) yellow IV Results Part A Results Mass of isolated trimyristin 0.103g Percentage of trimyristin isolated 89% Purity of isolated trimyristin Poor Reason for purity
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Magtalisay Tree Used in Lowering of Cholesterol Levels Magtalisay Tree (Terminalia catappa) or Indian Almond is a large tropical tree in the leadwood tree family‚ Combretaceae‚ that grows mainly in the tropical regions of Asia‚ Africa‚ and Australia. It is known by the English common names country-almond‚ Indian-almond‚ Malabar-almond‚ sea-almond‚ tropical-almond and false kamani. It is among one of the most common trees throughout India‚ Malaysia and many other parts of South East Asia‚ growing
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presence of unsaturated sterols‚ in this test‚ cholesterol in the given sample. ii. Results Sample Observations Residue C Blue green solution Vegetable Oil Emerald Green solution iii. Discussion Cholesterol is a member of a large group of substances called steroid‚ which include vitamin D. Cholesterol is an essential component of cell membrane‚ brain and nerve cells‚ and bile‚ which helps the body absorb fats and fat soluble vitamins. The body uses cholesterol to make vitamin D and various hormones‚ such
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Cholesterol‚ the good‚ the bad and the ugly! Miranda Parker Kaplan University Abstract Trans fat is double trouble for your health. Trans fat raises your LDL (low density lipoprotein) “bad” Cholesterol and lowers your HDL (high density lipoprotein) “good: cholesterol. Trans fat is considered by many doctors to be the worst type of fat you can eat. A high LDL cholesterol level in combination with a low HDL cholesterol level increases your risk of heart disease‚ the leading killer of
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fat in the diet without the risk of cardiovascular disease and increased LDL/HDL ratio. 38. For optimal heart health‚ should LDL be high or low? Should HDL be high or low? LDL should be low because it is the bad cholesterol level and HDL should be high because it is the good cholesterol level. Chem 107 HW 8 (16‚ 26‚ 32‚ 38) 16. Determine how much energy is released or required for the reaction shown. Is this reaction exothermic or endothermic? CO2 + 2 H2O → CH4 + 2 O2 This reaction is endothermic
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Exercise Research Paper Exercise is a very important part of a person’s lifestyle. It effects vary from your physical appearance‚ your body type‚ to your relationship with nutrition‚ your cholesterol‚ hypertension‚ heart diseases‚ and your immune system. The type of exercise that is done affects what part of your body that you exercise‚ and the duration as well as if it is done in the correct sequence varies the results. In the human body there are three muscle groups. The smooth muscle covers
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associated with cognitive decline in aging‚ which is associated with the risk of developing Alzheimer Disease. Low-density lipoprotein (LDL) cholesterol is collected in the walls of blood vessels‚ which can cause blockages and cerebral amyloidosis if the LDL level becomes higher. Since many patients with cerebral amyloidosis or Alzheimer Disease had LDL cholesterol concentrations in the normal range for the general population‚ we used the LDL subfractions classified by LDL particle size and density to
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stanol which allowed it to become refined and fat-soluble. They studied it further and found it to have a profound cholesterol-reducing effect when consumed. The findings were published in New England Journal of Medicine in November 1995; “after a 14-month trial‚ a daily intake of 25 grams reduces total cholesterol in the bloodstream by 10% and the level of more harmful LDL cholesterol by 14%” (Grant‚ 2010‚ p. 658). Raisio then combined the refined plant stanol with the margarine product they were
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Bromination Solo Experiment 3 – Individual Lab Report (Save as pdf and submit‚ due by 12:00 NOON one week after experiment) Last Name: First Name: TA Name: Date Lab Performed: Date Lab Submitted: Group A‚ B‚ or C: Comments for Grading TA: (Please indicate if you performed the lab on a day other than your regularly scheduled day and/or with a TA other than your regular TA). Page Limit: report must not exceed FIVE pages (including this page) LIMIT DOES NOT INCLUDE ANY GRAPHS‚ SPECTRA
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