segment surgery using AUROSIL PLUS presents risks which the surgeon must evaluate. Do not resterilize. Single use product only. Do not use if packaging that ensure sterility is damaged. Do not use after the expiry date. DIRECTIONS chemical analysis (H-NMR spectral test‚ gel permeation chromatography study and gas chromatography) to ensure purity level ? of catalyst impurities Low level In aseptic conditions transfer the contents of the bottle into a sterile syringe. Place the syringe in a syringe driver
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3-261.9ºC Results and Discussion Discuss the data that your team obtained in this section. Be sure to address any questions posed in the lab procedure as well as any additional questions that your TA wants you to answer. You should also analyze any NMR spectra that you have from the reaction
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Silicon Element Silicon is a chemical element with the symbol Si and atomic number 14 and atomic mass is 28. It is a tetravalent metalloid‚ less reactive than its chemical analog carbon‚ the nonmetal directly above it in the periodic table‚ but more reactive than germanium‚ the metalloid directly below it in the table. Controversy about silicon’s character dates to its discovery; it was first prepared and characterized in pure form in 1823. In 1808‚ it was given the name silicium‚ with an -ium
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Anise oil was successfully able to be extracted from anise seeds during this experiment. It was done by first crushing the seeds‚ then placing them into a distillation apparatus. The distillation apparatus evaporated the liquid from the seeds‚ which was captured in a flask. Next‚ DCM was added to the distillate‚ which allowed the water to be separated from the anise oil. Finally‚ the DCM evaporated and the pure anise oil was collected. The process of steam distillation allowed the anise oil in
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Expression and Purification of Human Platelet-Derived Growth Factor Beta (PDGF-B) Rachel C. Hermina-Stewart* and Elsie I. Parés-Matos† *Industrial Biotechnology Program‚ †Department of Chemistry University of Puerto Rico-Mayagüez Campus rachel.hermina@upr.edu December 14‚ 2009 ABSTRACT. Platelet-Derived Growth Factor (PDGF) is one of many proteins that regulate cellular growth and division. The PDGF family consists mainly of five different isoforms called as PDGF-A‚ PDGF-B‚ PDGF-C and PDGF-D. Three
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ATLANTIC COLLEGE CHEMISTRY DEPARTMENT (Written by Dr Geoffrey Neuss) CONTENTS Page Introduction 1 Assessment of Practical Work 3 Error and uncertainty 7 Significant figures 8 Title 1. Some common chemical reactions. 9 2. A traditional acid-alkali titration. 10 3. Analysis of aspirin tablets
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three intermediates – diethyl n-butylmalonate‚ potassium n-butylmalonate‚ and n-butyl malonic acid respectively. An IR was used to characterize the starting material‚ n-bromobutane‚ and the first intermediate‚ diethyl n-butylmalonate; while IR and NMR were used to characterize the final product‚ caproic acid. Reactions‚ Mechanism and Theory Caproic acid a.k.a n-hexanoic acid is a carboxylic acid derived from hexane which has the general formula C5H11COOH. It is a colorless oily liquid with a really
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encapsulated and loaded onto PLGA (Poly lactic glycolic acid) microspheres using double emulsification methodology for improving its efficiency in cancer therapy. Quercetin is extracted and purified using chromatographic and nuclear magnetic resonance (NMR) techniques. PLGA-heparin (PLGAh) and PLGA-heparin-quercetin (PLGAh+Q) loaded microspheres were characterized for morphology using scanning electron microscopy (FESEM). The PLGAh and PLGAh-Q microspheres were tested for its cytotoxicity against MCF-7
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LEARNING LOG 2: Observe‚ Connect and Reflect on Your Learning PART III – Symmetry in Crystals The most striking examples of symmetry…are crystals. Herman Weyl Period Focus Image Question Your Observations Complete at the end of Week 5 Image 5 Uvarovite is a gemstone rich in chromium. What are your main observations about uvarovite symmetry from studying the external form? (30 - 40 words) (2 marks) What is your personal favourite gemstone and what is its space group. (up to
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There are many different binding modes of ligands to transition metal atoms. In past experiments with Co(II) and Co(III)‚ you observed that a ligand such as Chloride or amine can coordinate in a monodentate fashion. You also observed that carbonate occupies two sites of a transition metal and is known as a bidentate ligand. In this experiment‚ you will observe the reaction of a -bond in an olefin with a molybdenum metal center to form a piano-stool shaped molecule. The molybdenum metal retains
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