Tetrapyrrole compounds: chlorophyll and heme groups By Erwin Lim 1. Tetrapyrrole compounds A tetrapyrrole compound is a chemical group that consists of four pyrroles that are joined together by covalent bonds‚ forming a porphyrin ring. They are naturally occurring pigments‚ which are used in many biological processes (Berg‚ 2009). The basic structure of a tetrapyrrole is as seen in Figure 1‚ while the basic structure of a pyrrole is as seen in Figure 2. Figure 1.Tetrapyrrole Compound (Berg‚ 2009)
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Danielle Moeller Professor Schilling Lit Block 4-22-07 Observation Reflection As I walked into the classroom for my first day of observations‚ I was greeted with a warm “Hello!” In fact‚ each time that I entered a new classroom I was given the same greeting. All of the teachers were more than happy to be helping a future educator by letting me observe their teaching styles and learn new techniques to use. Through spending time in various classrooms‚ I have gained valuable information that I will
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March 2011 Grade 7 Version BC Multiple Choice Identify the choice that best completes the statement or answers the question. Reading Comprehension Directions Read the following selections. Then answer the questions that follow. Athene’s City Olivia Coolidge In the days when Greece was first being settled‚ Cecrops was king in Attica‚ a rugged‚ triangular little country‚ good mainly for goat farming and the culture of honey bees‚ and surrounded on two sides by the sea. Here Cecrops
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August 15‚ 2012 COMPOUND MICROSCOPE A compound microscope is an optical instrument used to see objects that are too small for the naked eye. A compound microscope is a microscope fitted with two or more convex lenses. The high magnification produced by these lenses together enables a detailed study of micro-organisms‚ cells and tissues. These types of microscopes are therefore widely used in scientific and medical research. The basic design of a compound light microscope consists
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BINARY COMPOUNDS -Compose of two kinds of atom Polyatomic Ion | Name | OH-1 | hydroxide | SO4-2 | sulfate | PO4-3 | phosphate | NO3-1 | nitrate | CO3-2 | carbonate | HCO3-1 | hydrogen carbonate or bicarbonate | ClO3-1 | chlorate | NH4+1 | ammonium | TWO NON-METALS - Give the name of the positive ion followed by the negative ion ending with -ide -Greek prefixes are used CO-carbon monoxide CO2-carbon dioxide NO-nitrogen
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COORDINATION COMPOUNDS: * FLEXIDENTATE CHARACTER OF POLYDENTATE LIGANDS; * Poly dentate ligands have flexi dentate character in the sense that all donors atoms may not form coordinate bonds with the central metal atom or ion. For example; EDTA which is the hexa dentate ligand also acts as tetra dentate or penta dentate in certain complexes. Similarly sulphate ion‚ which is a bi dentate ligand‚ also acts as a mono dentate ligand in certain complexes‚ e.g. in [Co(SO4)(NH3)5]Cl. * LABILE
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И. В. АРНОЛЬД Лексикология современного английского языка Издание третье‚ переработанное и дополненное Допущено Министерством высшего и среднего специального образования СССР в качестве учебника для студентов институтов и факультетов иностранных языков Сканирование‚ распознавание‚ проверка: Аркадий Куракин (ark # mksat. net)‚ сен-2004. Орфография унифицирована к британской. Пропущены страницы: 50-53‚ 134-139‚ 152-161‚ 164-171‚ 201-202‚ 240-243 ББК 81.2 Англ-923 А 84
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spent it immediately. D. It is difficult to save money. 3. Choose the simple predicate in the following sentence. The men finished the game in a short time. A. game B. finished C. time D. men 4. Which of the following is a correctly written compound word? A. Spur of the moment-decision B. Self-evident C. Quickly-running D. Thirty one 5. Which synonym of the word look would be most effective in the following sentence? Detective Flint leaned forward with narrowed eyes to _______ what appeared
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older woman who is plump bald (adj): a person with no hair. A person can have a shaved head if s/he is bald or if s/he has hair but chooses to shave it off extroverted (adj): a confident person who enjoys being with other people Episode 2: Compound Words
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theft and violence are a natural. Sunny manages an occasional escape to the quietude of the library‚ but it’s not too long before he’s pulled into the street to deliver a package or drive a car. Meallet carries the reader along on a tide of together compound words that eventually becomes natural. Because he’s not telling the story in a typical novelistic arc‚ his characters take a while to coalesce. In the various vignettes Meallet stands out as a creator of powerful indelible scenes. A recently paroled
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