solvent should be high at high temperature & low at room temperature. If possible‚ the impurities should be insoluble in the solvent. 2.> How were soluble impurities removed from the derivative? [ANS] By soaking the impure derivative in 1 cm3 of methanol and resume suction. Repeat this for about 2 times. 3.> In the recrystallization procedure‚ why were the crystals dissolved in only the minimum amount of
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Evaluation of Paracetamol Content in Tablet Dosage Form Using UV-Spectrophotometry Casilagan‚ Camela Mae C.‚ and Jimenez‚ Joshua M. Chemistry Department‚ College of Science Adamson University Ermita‚ Manila 1.0 Introduction UV-Visible Spectrophotometry is a widely-used technique in Chemical and Pharmaceutical Analysis. And this method has been very useful both for Qualitative and Quantitative Applications‚ especially for organic compounds. Some of its advantages for Quantitative purposes
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AVL PRODUCT DESCRIPTION FUEL CONSUMPTION MEASUREMENT AVL FUEL MASS FLOW METER Description The AVL Fuel Mass Flow Meter is a high precise and continuous fuel consumption measurement system‚ which is used worldwide at almost all engine test beds where engines of a maximum consumption of 125 kg/h are tested. The system stands out for a very high accuracy and because of the modular design it can be combined with existing conditioning systems. The fuel system AVL Fuel Mass Flow Meter enables a
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Name ________________________ Lab 1. Volcanic Hazards VOLCANOES INTRODUCTION Few things excite the imagination as much as a volcanic eruption‚ one of nature’s magnificent spectacles‚ which can result in devastating consequences. The very word “volcano” brings to mind thunderous explosions‚ rivers of fiery orange lava‚ and images of smoking destruction. The actual capacity for destruction is not overrated -- volcanic eruptions are one of the most devastating of all geologic hazards. There
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biological methods. The Chrysophyllum canito leaf extracts were used for silver nanoparticles synthesis. In this study utterly revealed the best milli molar concentrations of silver nanoparticles synthesis in diverse solvents such as aqueous‚ ethanol‚ methanol‚ chloroform and petroleum ether‚ but the excellent silver synthesized solvents only chosen for further more characterization studies. The aqueous and ethanol solvents sample and chemically synthesized oxalic acid silver synthesis got excellent
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Aldehyde and Ketone 1. ALDEHYDE Definition: An aldehyde is an organic compound containing a formyl group. This functional group‚ with the structure R-CHO‚ consists of a carbonyl center (a carbon double bonded to oxygen) bonded to hydrogen and an R group‚ which is any generic alkyl or side chain. The group without R is called the aldehyde group or formyl group. Aldehydes differ from ketones in that the carbonyl is placed at the end of a carbon skeleton rather than between two carbon atoms
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cold temperatures and it is harder to travel through the tubes(high viscosity) while hydrogen doesn’t solidify . * Biodiesel releases the most C02 out of all the fuels. Hydrogen releases water vapor * The range for biodiesel cars is 10% less than propanol cars . Hydrogen cars have 25% more range than biodiesel cars and 15% more than propanol cars. Hydrogen VS propanol: * Propanol has problems in high climates due to viscosity and the fuel solidifying while hydrogen cars don’t have problems
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Sci Research article Pharm www.scipharm.at Open Open Access Formulation Optimization of Hydrodynamically Balanced Oral Controlled Release Bioadhesive Tablets of Tramadol Hydrochloride Bhupinder SINGH *‚ Ashu RANI‚ BABITA‚ Naveen AHUJA‚ Rishi KAPIL University Institute of Pharmaceutical Sciences‚ UGC Center of Advanced Studies‚ Panjab University 160 014‚ Chandigarh‚ India. * Corresponding author. E-mail: bsbhoop@yahoo.com (B. Singh) Sci Pharm. 2010; 78: 303–323 Published: Accepted:
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CHAPTER I THE PROBLEM Introduction In the Philippines‚ soy beans are enjoyed most in the form of popular street snack called taho. This yogurt-like concoction is similar to fresh tofu as both are eaten with spoons. Taho is served by street vendors who carry shiny tin containers that are balanced on both ends of a wooden plank. One can hold the hot taho‚ which is scooped into a cup. The other can hold the caramel sauce and tapioca which is mixed in the cup. These vendors travel the residential
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obtained. 3. Step 1 and 2 are repeated for three times to make sure the purple or pink solid is obtained. (C) The cis to trans isomerisation 1. A solution of (0.02M; 14mg in 25ml) of the trans isomer and cis isomer is prepared in methanol and its UV-visible spectrum is recorded. 2. The solution is placed quickly and tightly stoppered into a constant temperature bath at 35 °C 3. The most
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