The dissolution of the drug in different liquisolid formulations was performed in 500 ml simulated salivary fluid (phosphate buffer pH 6.8) maintained at 37 ± 0.5 ºC using the USP dissolution tester apparatus II‚ at a rotation speed of 50 rpm. Aliquots from the dissolution medium were withdrawn at 1‚ 2‚ 3‚ 4‚ 5‚ 6‚ 7‚ 8‚ 9‚ 10‚ 12.5‚ 15‚ 20‚ 25 and 30 minutes time intervals. The samples were changed with fresh dissolution medium of same amount to maintain a constant volume in the vessels. Samples
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Managerial Decision Kathy Stamps BUS. 640: Managerial Economics Michael Thirtle March 19‚ 2011 oAbstract Should we buy a new machine or upgrade the old one? One of the managerial decisions that our local hospital had to make was whether to transition into a digital format with our portable x-ray machines by performing transformation upgrades to both existing analog units or to trade them in and use their value to offset the total price incurred by the purchase of new units. This
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pdfMachine ii Is a pdf writer that produces quality PDF files with ease! Produce quality PDF files in seconds and preserve the integrity of your original documents. Compatible across nearly all Windows platforms‚ if you can print from a windows application you can use pdfMachine. Get yours now! TABLES OF CONTENT ACKNOWLEDGEMENT TABLE OF CONTENTS LIST OF TABLE LIST OF FIGURES ABSTRACT ABSTRAK CHAPTER 1 - INTRODUCTION 1.0 Introduction 1.2 Problem of statement 1.3 Scope of study 1.4 Objectives
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19 Synchrotron Radiation Gwyn P. Williams National Synchrotron Light Source‚ Brookhaven National Laboratory 20 21 Synchrotron Radiation Gwyn P. Williams National Synchrotron Light Source‚ Brookhaven National Laboratory Today synchrotron radiation is used for a number of applications. The Na tional Synchrotron Light Source at Brookhaven National Laboratory (BNL) serves the needs of a large spectrum of university and industrial users. The range of applications covers such diverse
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and Somerville from 1928-1932. she analyzed glass tessellate from Jerash. She decided to do research on X-ray Crystallography. She did a lot of research on crystals and x-rays. Later in her life she became a teacher in chemistry for the women’s college. She became the university reader for x-ray crystallography in 1956. she also worked in the department of mineralogy and crystallography. She continued her research on interesting biological molecules. One of those molecules was insulin. Her research
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lab‚ where Watson and Crick did their research and he was the founder of the crystallography. Erwin Chargaff was an Australian born biochemist that discovered the four bases paring of the DNA. Francis Crick who was Watson’s colleague in the discovering the structure of the DNA is described to be very outspoken and bright. Rosalind Franklin also called Rosy was Maurice Wilkin’s assistant who was trained in crystallography. Maurice Wilkins was physicist turned biologist who studied the molecular structure
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Double Helix Readers Guide * Max Perutz – was the head of the unit where Crick works at Cambridge University. Perutz also shared important X-ray crystallography imagery with Watson and Crick that he had received from Maurice Wilkins and Franklin. Whether he was supposed to give this information to Watson and Crick without Franklin’s knowledge is unknown‚ nor is it entirely known how important her work was to the discovery of the structure. * Sir Lawrence Bragg – the head of the Cavendish
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first year‚ but passed the next (Adler). A few years later‚ after getting out of college‚ Pasteur decided to study in crystallography‚ which soon made him famous (Encyclopedia of Life Sciences). At age 26‚ decided he was tired of studying crystallography and tried a different field: bacteria (Manning 193). Studying bacteria was far more successful than studying crystallography. He had discovered three new types of bacteria: staphylococcus‚ streptococcus‚ and pneumococcus (Dakes 165). He also discovered
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prepared string into the solution and let sit at room temperature‚ undisturbed‚ and be aware of the solution’s solubility for several days allows us to control its rate of growth. 4. What shape did the crystals take? In the field of crystallography‚ these are called monoclinic
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Three-Dimensional Structure of Proteins Rotation around the -Carbon in a Polypeptide A Sterically Nonallowed Conformation The Helix and Pleated Sheet Conformationally allowable structures where backbone is optimally Hbonded (linear Hbonds). Helix (3.613 Helix): •3.6 residues/turn •Rise = 0.15 nm/ residue •13-atom hydrogenbonded loop Linus Pauling and Robert Corey‚ 1950 Pleated Sheet: •Anti-parallel or parallel •2.0 residues/”turn” •0.34 nm/residue (anti-parallel) or 0.32 nm/residue
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