Stilbene exists as two possible isomers. The first is trans-1‚2-diphenylethylene‚ called trans-stilbene. The second is cis-1‚2-diphenylethylene‚ called cis-stilbene which is sterically hindered and less stable because the steric interactions force the aromatic rings out-of-plane and prevent conjugation. Z-stilbene has a melting point of 5°C to 6°C‚ while (E)-stilbene melts around 125°C‚ illustrating the two compounds are quite different. These two isomers can interconvert‚ however‚ under the influence
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or group of atoms that provide a carbon compound with its distinguishing molecular properties‚ of carboxylic acids is the –COOH carboxyl group. In the process of forming an ester‚ the hydrogen in the carboxyl group is replaced by a hydrocarbon group. This hydrocarbon group is provided by an alcohol‚ most commonly ethanol‚ or grain alcohol. An alcohol is a chemical compound whose molecular structure is comprised of a hydroxyl group –OH chemically bonded to a carbon. One of the simplest and most
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number of other countries in the region‚ including the United Arab Emirates‚ Kuwait‚ Qatar‚ Oman‚ and Egypt‚ have either completed major petrochemical projects or are planning them. SABIC‚ created 24 years ago to add value to Saudi Arabia’s massive hydrocarbon resources‚ has grown into one of the world’s largest and lowest-cost petrochemical producers‚ with more than 25 million m.t./year of capacity‚ almost all of which is joint ventures. SABIC vice chairman and managing director Mohamed H. Al-Mady says
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Workmen’s Compensation 1 LAWS OF MALAYSIA REPRINT Act 273 WORKMEN’S COMPENSATION ACT 1952 Incorporating all amendments up to 1 January 2006 PUBLISHED BY THE COMMISSIONER OF LAW REVISION‚ MALAYSIA UNDER THE AUTHORITY OF THE REVISION OF LAWS ACT 1968 IN COLLABORATION WITH PERCETAKAN NASIONAL MALAYSIA BHD 2006 2 WORKMEN’S COMPENSATION ACT 1952 First enacted ... ... ... ... … … 1952 (F.M. Ordinance No. 85 of 1952) 1982 (Act 273 w.e.f. 22 July 1982) Revised ... ... ... ...
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Chemistry of Spices This page intentionally left blank Chemistry of Spices Edited by Villupanoor A. Parthasarathy Indian Institute of Spices Research Calicut‚ Kerala‚ India Bhageerathy Chempakam Indian Institute of Spices Research Calicut‚ Kerala‚ India and T. John Zachariah Indian Institute of Spices Research Calicut‚ Kerala‚ India CABI is a trading name of CAB International CABI Head Office Nosworthy Way Wallingford Oxfordshire OX10 8DE UK Tel: +44 (0)1491 832111 Fax:
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to plan‚ organize‚ and implement programs for the development of oil resources and the sale of petroleum products and also to perform plans sent down from central government. Usages of Petroleum Petroleum is mostly used as Fuel. Several other hydrocarbon chemicals can be distilled out of petrol which again can be used for a variety of purposes. Some of petrol’s end products are- Alkenes (olefins) which can be manufactured into plastics or other compounds Lubricants (produces light machine oils
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INTRODUCTION Background of the Study Orange peeling does not simply serve as a protective covering to the fruit but it has various benefits used in different ways such as a dried seasoning‚ a candied desert‚ an air freshener‚ an insect repellant‚ an aromatic support in relieving tension‚ and in many other medicinal actions. However‚ on unusual use for dried orange peelings is a kindling for fire. The orange oils found in the peels are indeed flammable but they burn more steadily than other common kindling
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water. H O H R O H Alcohols are usually classified as primary‚ secondary and tertiary. H R H OH H primary R R OH R R OH OH R secondary tertiary phenol Alcohols with the hydroxyl bound directly to an aromatic (benzene) ring are called phenols. Nomenclature of Alcohols (Normally any compound’s name which ends in –ol is an alcohol of some sort) IUPAC rules that: (1) Name the longest carbon chain bearing the –OH group. Drop the last –e from the alkane
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HEALTH HAZARDS OF THE DYE INDUSTRY . The first step in prevention of poisoning in the dye industry includes well-ventilated‚ properly equipped buildings. Selection of workmen is important and the use of the best methods in manufacturing. These investigations‚ which are based on 2‚500 employees‚ whose blood was tested periodically‚ yield some minor diagnostic material. The hazards of the dye industry are those connected with any industry plus the poisonous chemicals necessarily handled in the
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SEPERATING CYCLOHEXANE AND TOLUENE BY DISTILLATION Aim: Separate two miscible liquids‚ either by macroscale or microscale process‚ using simple and fractional distillation. Compare the efficiencies of simple and fractional distillation. INTRODUCTION: The purpose of this experiment is to learn how to separate two miscible liquids by microscale process. There will be use of simple and fractional distillation. Simple and fractional distillation efficiencies will be compared. The student should have
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