CHEM3412 Synthesis of a Porphyrin Porphyrins are hetereonuclear‚ macrocyclic compounds that play an important role in living organisms. Examples include the non-protein heme portion of hemoglobin in animals whereby the lone pairs on nitrogen can bind to the oxygen-carrying iron. In plants‚ chlorophyll uses the vast conjugation to allow absorption of light for photosynthesis. The characteristic colors of porphyrins is also due to the conjugation. An examination of the porphyrin structure
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Gay/Lesbian Families Adoption is an extremely sensitive subject‚(insert dash) especially for individuals who are Gay or Lesbian. There is much controversy on the topic. There are a variety of ways to which it isn’t possible for a couple to adopt. Infertility is becoming a greater problem in our time. In Gerald P. Mallon’s article‚ “Assessing Lesbian and Gay Prospective Foster and Adoptive Families: A Focus on the Home Study Process‚” in 2007. He introduces a few different ways gay men and lesbian
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Quitay Morris Jake N. Professor Rafie Paz ENGL 1013 July 29 2013 Why are Teenagers so Lazy Today? The youth is the hope of the nation. That is the sentence that defines what the teenagers’ worth to the country is. We are supposed to change what the country is now. But the question is . . . Can we? From what I observed is happening now‚ instead of being the country’s biggest hope‚ we seem to be one of its burdens. There’s pre-marital sex‚ prostitution‚ juvenile delinquencies‚ and the list
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J. of Advanced Engineering and Technology Vol. 2‚ No. 2 (2009) pp. 281-283 Synthesis of 2-Acetylcyclohexanone Using Pyrrolidine-enamine Eun-SunYoo Department of Oriental Medicine Industry‚ Honam University‚ Korea (Received : May. 20‚ 2009‚ Revised : Jun. 02‚ 2009‚ Accepted : Jun. 12‚ 2009) Abstract : 2-Acetylcyclohexanone was synthesized by acylation reaction of acidic anhydride using enamine as organiocatalyst instead of a strong base‚ NaOH‚ resulting in milder reaction conditions. The
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Bio 93 Review Sheet: 1. Understand all the THEMES presented in the introductory lecture (lec 1). 2. What is an open system? Energy in and out‚ comes in and leaves as heat 3. What are the 4 most important elements in the human body? C‚ O‚ N‚ H 4. Draw the periodic square for Helium. How many valence electrons does it have? How do you figure this out using the periodic table? Two valence e-‚ 23He‚ all the way right full shell only holds two electrons 5. What is an isotope? How are they used
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acidification of salicylic acid and acetic anhydride. The objective was to convert a specific amount of salicylic acid into the same amount of aspirin that was high in purity. Furthermore‚ the other objectives were to enable students to conduct the synthesis of aspirin‚ reinforce skills or recrystallisation and the technique of melting point determination. The amount of each compound should be the same because there is a 1:1 ratio between them. The purity of the synthesized aspirin was measured by determining
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Lauren Spillers Biology 1408 February 5‚ 2013 Lung Cancer Lung cancer is the number one form of deadly cancer in the United States. It is not only something that can kill you but also can put a strain on you and your family financially‚ emotionally‚ and medically. Lung cancer is formed when the cells of the lungs grow in an uncontrolled way‚ this creates a lump or a tumor which can either be malignant (cancerous) or benign (not cancerous). Radon gases‚ smoking‚ and second hand smoke cause lung
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Salters Nuffield Advanced Biology AS Revision summary Unit 1 Topic 1: Lifestyle‚ health and risk Topic 2: Genes and health Unit 2 Topic 3: Topic 4: SNAB Biology AS Revision Summary Understanding the specification The following summary tries to explain what is meant by the specification statements for the SNAB AS course. SNAB includes a lot of material because it helps you to understand ideas or because it is interesting‚ but it can be a little confusing when it comes to knowing what to
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warm-blooded animal with hair or fur; female mammals produce milk to feed their young. fish Vertebrates which live in water‚ usually have scales and breathe through gills. amphibian A vertebrate with moist skin and no scales that lives part of its life in water and part on land. bird Egg-laying vertebrates with feathers and forelimbs modified as wings. reptile A vertebrate that lays eggs and has lungs and scaly skin. invertebrate an animal without a
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Jeana Greaves Chem3301-112 June 19‚ 2013 Synthesis of Aspirin from Methyl Salicylate Introduction The synthesis of Aspirin (Acetyl Salicyclic Acid) began with methyl salicylate and sodium hydroxide as the reagent. The polar oxygen accepts the electrons from now positively charged hydrogen. The positively charged sodium disassociates leaving the hydroxide ion with a negative Scheme 1 shows the mechanisms that were demonstrated during the synthesis of Aspirin. charge that attracts to the positively
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