Introduction ESTERS are compounds derived from the reaction of a organic acid with an alcohol. Acid + Phenol/alcohol --> ester + water R--C=O + R’--OH ----> R--C=O + H2O | | C-OH C-O-R’ Esters are the compounds that give fruits their characteristic flavours and odours. ie. methyl salycilate is "Oil of Wintergreen". http://www.petrik.com/PUBLIC/library/misc/glossary_of_org_chem.htm#ESTERS Aim To synthesise the ester 3-methylbutyl ethanoate( isopentyl acetate) and to identify the product
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SYNTHESIS OF ESTERS USING GREEN AND NON-GREEN CHEMISTRY Abstract Esters are a class of organic compounds with the general formula RCOOR’. Ester also contributes the flavor and aromas in fruits and flowers. The esterification reactions will use in the procedure‚ which are the interaction of a carboxylic acid with an alcohol‚ aided by an inorganic acid catalyst (H2SO4). Moreover‚ the green method will not use any catalyst but using heating source instead (microwave). Based on the comparison of
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5.1 Refusal Skills – Work File Read each of the case studies located on the activities page in the 5.1 assignment and choose one of the case studies to complete the refusal sequence. Assignment Using the refusal skills sequence‚ complete the case scenario by indicating how you would refuse to be involved in the situation. Include all eight steps of the refusal sequence‚ and use the format indicated below for each step. (List the step then the action) Answer the reflection question
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Questions: 1. Discuss the significance of all of the five operations performance objectives (quality‚ speed‚ dependability‚ flexibility and cost) to VBA’s activities and explain which of these you consider to be the most important to build into the design of VBA’s processes 2. Explain how process technology helps this operation to achieve its objectives? 3. Sketch the flow of flowers in the VBA operation. Describe and explain what you think are the critical points in this flow? 1.1 Objective
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In Chains‚ by Laurie Halse Anderson‚ Isabel’s pursuit of freedom is a metaphor for America’s pursuit of freedom. The first time Isabel had thoughts of freedom is on page 51. “It wasn’t right for one body to own another or pull strings to make them jump.” Isabel realized that it wasn’t right for someone to own another human being. This is metaphoric to the colonists‚ who realized that the taxes that Britain was forcing on them weren’t right. They began having thoughts of wanting to be free from the
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Isabel Hampton Robb Darlene Gillet Nova Southeastern University Isabel Hampton Robb There have been several women in history who have been instrumental in initiating significant changes to the profession of nursing—from the most famous Florence Nightingale‚ the quintessential ‘Mother of Nursing’‚ to current leaders‚ researchers and educators who continue to provide information for the betterment of the profession. However‚ there are only a handful of individuals who‚ through their lifelong
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men of the Spanish conquest Isabel became "a symbol of great legal and sociological importance to the Hispanization and Christianization of Mexico" (Chipman 217). As the wife of prominent men Isabel would be a model of the Hispanicized Indian woman. It was this image that women across New Spain were expected to emulate. As Chipman says‚ it was this image and the principles on which it was founded that would "provide a solid matrix for a new society" (219). Isabel was an intelligent woman of status
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tribute‚ there were so many things I wanted to tell you all; from each adventure‚ every smile that was made because of Isabel’s gentleness & generosity‚ to every laugh and all the times I can possibly remember of her.. Good or bad. When I had first met Isabel‚ I was boarding off from sea one sunny winters afternoon. What had caught my attention about her the second I laid eyes on her was her laugh‚ & the curls of her dark hair swirling in the wind; the first time I realized how beautiful she was. With
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with the aftermath. She’s gone. And I’m still here. The past two months I’ve been surviving‚ not living. Just thinking about it now burns deep inside of my chest‚ the sensation feeling as though a load of hot coals have been placed there firmly by Isabel herself. Now sitting in my cold dark room‚ I feel as though half of my soul is gone from this life‚ she has taken it. Along with her last breath. I keep replaying our first date in my mind‚ the way her light brown hair blew effortlessly in the warm
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Alexandra Smith History 111 Dr. White November 16‚ 2012 Alexandra Smith History 111 Dr. White November 16‚ 2012 Response: Esther the Queen If Esther‚ also known as Hadassah‚ lived in our day she would probably say her life changed from that of an ordinary girl to a fairytale Princess. The story of the Bible’s Queen Esther is filled with intrigue‚ romance‚ bravery‚ and honor. It is the story of a Queen who became the savior of her people through a curious mix of
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