Sulfur and ammonia‚ the stench of the chemicals clung to the air coupled with the macabre scent of burnt flesh‚ a smell that simultaneously reminded one of a hospital and a barbecue. Three bodies lay torn asunder and charred on the streets of Tiber city‚ jagged black lines burnt into the surrounding brick walled alleyway. Sebastian Thorn was familiar with such scenes of flagrant violence‚ the handy work of an unlicensed mage‚ lightning was what had turned these people into charred corpses and burned
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It is ‘thiazolidine-2‚4-dione’ and not thiohydantoins as the reaction product of monosubstituted thioureas and chloroacetylchloride a a a a a The reaction products of monosubstituted phenylthioureas with chloroacetylchloride in a polyethylene glycol (PEG-400) medium and K2 CO3 as base/catalyst at an elevated temperature are exclusively thiazolidine-2‚4-diones and not thiohydantoins as has been reported. The core unit thiazolidine-2‚4-dione is essentially derived from chloroacetylchloride
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Biosynthesis and Biofunctions of Iron-sulfer proteins Yiming Chen‚ Brown University‚ May 11th‚ 2011 I. Introduction Iron-sulfur proteins are the proteins which contain iron-sulfur clusters‚ like sulfide-linked di-‚ tri-‚ and tetrairon centers with various oxidative states 1. An excess of 120 distinct types of enzymes and proteins are known to contain Fe-S clusters2. Iron-sulfur proteins are known for the role of the oxidation-reduction reactions of mitochondrial electron transportation. They are also
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The Carbon Cycle is a complex series of processes through which all of the carbon atoms in existence rotate. The same carbon atoms in your body today have been used in countless other molecules since time began. The wood burned just a few decades ago could have produced carbon dioxide which through photosynthesis became part of a plant. When you eat that plant‚ the same carbon from the wood which was burnt can become part of you. The carbon cycle is the great natural recycler of carbon atoms. Unfortunately
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accurate balance. Sulfur can be determined gravimetrically. Sulfur is found in minerals such as iron pyrite‚ gypsum and coal. Coal may contain as much as 4% sulfur in various forms: pyritic sulfur (as S 2 2-)‚ sulfur in sulfates (as SO42-) and in a variety of organic forms‚ such as thiophenols and thiophenes. When coal with high sulfur content is burned sulfur dioxide is formed which is a major primary air pollutant. Obviously the value of coal as a fuel decreases as the sulfur content increases
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Chapter 2 22. A student heats 0.5585 g of iron with 0.3550 g of sulfur. She reports that she obtains 0.8792 g of iron sulfide and recovers 0.0433 g of unreacted sulfur. Show by calculation whether or not her results obey the law of conservation of mass. Total mass initial = 0.5585 g + 0.3550 g = 0.9135 g Total mass final = 0.8792 g + 0.0433 g = 0.9225 g These two values should be equal by the law of conservation of mass. These results do not obey the law of conservation of mass. Possibly she
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INTRODUCTION From natural gas‚ crude oils‚ and other fossil materials such as coal‚ few intermediates are produced that are not hydrocarbon compounds. The important intermediates discussed here are hydrogen‚ sulfur‚ carbon black‚ and synthesis gas. Synthesis gas consists of a nonhydrocarbon mixture (H2‚CO) obtain- able from more than one source. It is included in this chapter and is fur- ther noted in Chapter 5 in relation to methane as a major feedstock for this mixture. This chapter discusses
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Acid rain is mostly caused by human emissions of sulfur and nitrogen compounds which react in the atmosphere to produce acids. In recent years‚ many governments have introduced laws to reduce these emissions. Emissions from volcanoes and those from biological processes that occur on the land‚ in wetlands‚ and in the oceans account for the contribution of the pricipal natural phenomena of acid-producing. However‚ the principal cause of acid rain is sulfur and nitrogen compounds from human sources‚ such
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keep it simple science Ryde Secondary College‚ SL#710371 INDUSTRIAL CHEMISTRY What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. THE CHEMICAL INDUSTRY 2. CHEMICAL EQUILIBRIUM 3. PRODUCTION OF SULFURIC ACID 4. PRODUCTION OF SODIUM HYDROXIDE 5. SOAP & DETERGENTS 6. THE SOLVAY PROCESS FOR Na2CO3 ...all in the context of the applications of Chemistry in human society. 1. THE CHEMICAL INDUSTRY The “Invisible” Industry Most people are familiar
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titanium from the minerals after mining. 3. Cleaning iron – because very corrosive used to remove the oxide layer from iron or steel before they are galvanised or electroplated. Describe the processes used to extract sulfur from mineral deposits‚ identifying the properties of sulfur which allow its extraction and analyzing potential environmental issues that may be associated with its extraction Most sulphur is extracted from mineral deposits using the Frasch process. Superheated stream is pumped
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