SYNTHESIS AND CHARACTERIZATION OF HIGHLY CROSSLINKED HYALURONAN HYDROGELS Newell R. Washburn1‚ Sidi A. Bencherif1‚ Abiraman Srinivasan2‚ Jeffrey O. Hollinger2‚ Ferenc Horkay3‚ Krzysztof Matyjaszewski1 Departments of 1Chemistry and 2Biomedical Engineering Carnegie Mellon University‚ Pittsburgh‚ PA 15213 3 Laboratory of Integrative and Medical Biophysics National Institutes of Health‚ NICHD 13 South Drive‚ Bethesda‚ MD 20892 Introduction Methacrylation of hyaluronic acid (HA) with glycidyl methacrylate
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industrial settings due to the simplified synthesis and safety parameters of the overall reaction. Both benzoic acid and methanol are relatively cheap to obtain from a commercial source as well as being easy to store with a relatively long shelf life. The Fischer esterification method is a fundamental and important synthesis process in training our future chemists in both commercial and academic employment and principles. By utilizing this method of synthesis‚ the chemist has the knowledge to utilize
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82ppm strongly indicates an ether functional group and the remaining peak at 170.53ppm is representative of an ester carboxyl functional group. In terms of the analysis for the H1-NMR‚ several peaks were present that mimicked the types of functional groups present in the C13-NMR. Such includes peaks from 0.4-1.5ppm that are representative of primary and secondary alkyl functional groups‚ and peaks at 3.921ppm‚ 3.899ppm‚ and 3.876ppm which are strongly indicative of an ether functional group. After
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Grignard Synthesis of Tirphenylmethanol David Szuminsky Organic Chemistry Lab II Shaopeng Zhang Monday 1PM 2/10/14 & 2/24/14 - Abstract A sample of triphenylmethanol was prepared using Grignard synthesis techniques. Reflux was used in order to speed up the reaction and the final product was purified using recrystallization methods. The percent recovery and percent yield were 80.46% and 47.526%‚ respectively. A melting point range of 85-87oC was obtained from
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During the recess of the Chung case‚ Judge Moore motioned to move forward with the next case. The defendant Jeffrey Gaddy was presented to the court was along with Mr. Francisco. Once Mr. Francisco was sworn into court‚ defense attorney Clayton asked him to recall the incident. Mr. Francisco stated that the defendant Jeffery Gaddy was accused of burglary and breaking into the backdoor and two offices within ACE Tree Service. The officer on duty responded to the initially burglary call and found Mr
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Abdulfatah Momen R/W class One of the basic components of the community is children. Some of families think that having children bring problems to their life. Some of these families decide to work off children by medical science before children come to the life. The way that they choosing is abortion. Abortion was made by women who are pregnant‚ and they don’t want to have children. Abortion is the termination of a pregnancy by the removal of the fetus. Rates of abortion increase to be very
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Megan Garber Professor Keltner Composition 1 3 November 2013 The Ways Media Portrays Women Throughout today’s society‚ media contributes to almost everyone’s daily life. From informative news channels to comical television shows‚ media proves to be effective in advertisement‚ releasing messages and informing the audience. Although media proves to be wildly effective in advertising‚ releasing messages and informing the audience‚ periodically destructive and misleading messages are provided
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The people of America live in a country whose citizens are gifted with the system of Democracy where each person has their voice represented in decisions of the nation. The inherent responsibility of each voting age citizen of America is to research the positions and views of all candidates that represent them and then punch‚ mark‚ or press the space next to the candidate that they believe would best represent him or her. But not all Americans would care to look closely at the opinions of the election
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In part A‚ solutions needed in the experiment were prepared‚ and the LabQuest was set up. By adding 100mL 6M HCl to 200mL deionized water‚ 300mL of 2M HCl solution was prepared. Then 150mL 2M NaOH solution was prepared by adding 100mL 3M NaOH to 50mL deionized water. Finally‚ the LabQuest was connected to the temperature probe‚ and set up to collect data every 15 seconds‚ the duration was set to be 180 seconds. In part B‚ three reactions were performed. In reaction 1‚ two Styrofoam cups were stacked
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ST. Peter’s Academy Polangui‚ Albay ORSEM 2014 Submitted By: Krisell Agaton Submitted to: Mr. Gilbert Baynado What I Did/What I Learn/ What I Want To Learn This seminar‚ we the 4th year join forces to make this event memorable and successful with our little effort in doing tasks that were assigned. I was in charge on the preparation of the program that was given to our guest speakers and groupmates. I also help in decoration
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