-APPLICATION OF ENZYMES IN ORGANIC CHEMISTRY Why enzymes in organic synthesis? | Alternative to chemical methods: * High region- and stereoselectivity * Milder reaction conditions * Environmentally more friendly | Which enzyme(s)? | OxidoreductasesHydrolasesLyasesIsomerases | Which reaction system? | AqueousAqueous and water-miscible organic solventAqueous and water-immiscible organic solventPure organic solventOther solvents (supercritical fluids‚ ionic liquids) | Which ‘chemistry’
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ginger grass‚ cinnamon‚ and star anise; β-phellandrene also occurs in lemon oil and Japanese peppermint oil. Another cyclic diene‚ α-terpinene‚ is obtained from the essential oils of cardamom‚ marjoram‚ and coriander. The Diels-Alder reaction is stereoselective‚ usually yielding only one of several possible stereoisomers. Methods: Dissolve 0.85 mL of the eucalyptus oil in 2 mL of anhydrous diethyl ether in a pear-shaped flask containing a magnetic spin vane‚ and add 450 mg of maleic anhydride. Gently
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Why I visit the Temple? Hinduism originated in India about 4000 years ago and is the world’s oldest existing religion. Hinduism has now widely spread across the shores and people are attracted towards the themes in Hinduism which includes- Dharma‚ Samsara‚ Karma‚ and Moksha. The Hindu temple is a place of worship for Hindus with its rich architecture which attracts millions of people from around the world. Badrinath temple‚ Brihadeeswara temple‚ Somnath temple‚ Kashi Vishwanath temple‚ Tirupati
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The Open Mineral Processing Journal‚ 2011‚ 4‚ 25-44 25 Open Access Flotation Frothers: Review of Their Classifications‚ Properties and Preparation Hamid Khoshdast* and Abbas Sam Department of Mining Engineering‚ Faculty of Engineering‚ Shahid Bahonar University‚ 76169133‚ Kerman‚ Iran Abstract: The importance of frothers in flotation is widely acknowledged‚ particularly in terms of their role with respect to bubble size‚ and the stability and mobility of the froth phase. These factors
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Purpose: • To study some of the physical properties of two types of solids – ionic and molecular solids. • To classify three unknown substances as ionic compounds‚ polar covalent compounds or non-polar covalent compounds. • To identify the three unknowns. Observations: A B C Solubility in: • H2O • 2-Propanol Soluble Insoluble Soluble Insoluble Insoluble Soluble Conductivity None High None Melting Point 100 – 525 ℃ > 525 ℃ < 100 ℃ Odour Subtle None Very Strong Concluding
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reactions‚ substitution‚ elimination‚ etc 3) Delocalization and conjugation – theory of resonance‚ structure of alkenes‚ allyl‚ vinyl systems. 4) Acidity‚ basicity and pKa 5) Conformational Analysis - Cyclohexane 6) Stereochemistry – regioselective‚ stereoselective‚ stereospecific 5 Examples of Topics covered for Revision Quiz 1 (not limited to the topics below) 1) 2) 3) 4) 5) 6) 7) 8) Acids and Bases Conformations of Alkanes and Cycloalkanes Alcohols and Alkyl halides Elimination Reactions of Alkenes
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Marta Gebregziabher Discussion and Conclusion: Addition reaction of Alkenes: Bromination of (E)-Stilbene 1. Addition reaction is a reaction that involved two molecules that combine to make a larger product. Addition reaction has two main types‚ electrophilic addition and nucleophilic addition. An electrophilic reaction is when the pi bond of a molecule is removed to make two covalent bonds that are bonded to two new molecules. A nucleophillic addition is a reaction that removed the pi bond
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°Thioridazine hydrochloride‚USP. Is a member of the piperizine subgroup of the phenothiazines. Thioridazine occurs as a white or slightly yellow‚ crystalline or micronized powder‚ which is odourless or has a faint odor and is practically insoluble in water and freely soluble in dehydrated alcohol. The drug has sedative and hypotensive activity in common with chlorpromazine and less antiemetic activity. thioridazine is indicated for the treatment of schizophrenic patients who fail to respond
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Safety of Sunscreen The sun’s rays have powered life on our planet since its creation‚ and have made life possible for all living things. The sun is one of the most important elements of the universe‚ but in recent years has only been condemned for some of its harmful effects on humans. Lately‚ all that is heard about the sun anymore is how can be harmful and how protection from overexposure is needed. Many people are scared of dangerous overexposure effects such as sunburn‚ premature aging of the
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CEM 3005W 2013 “Reaction Classes and Pericyclic Reactions” ● 4 Lectures ● Recommended Texts: (i) J. March “Advanced Organic Chemistry”‚ p 839‚ `---Edn.‚ Oxford (W); Warren (2) Ch 34‚ 35. Syllabus 1) General principles (a) Reaction classes (i) Heterolytic (ii) Homolytic (iii) Pericyclic (b) Pericyclic Reaction Types 2) Electrocyclic Reactions (a) Definition and examples (b) Stereochemical aspects and the Woodward and
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