CHAPTER I THE PROBLEM AND ITS BACKGROUND Background of the study Herbal medicines have been part of the ingenious way of living in the society since the earlier times. Primitive men have been using this kind of medicine as the primary method of medication without undergoing different industrial processes. Herbal medicines have really come a long journey way back to the ancient times of Herbalism. One of the considered pioneers in Herbal medical field was Imhotep‚ a priest-physician of the ancient
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The preparation that goes along with creating and designing sneakers is meticulous and time consuming‚ however pays off if done correctly‚ which is evident when the sneakers are finished. First you must grab your acetone along with your cotton balls‚ and begin to use little drops of acetone on the cotton balls‚ in which you will be rubbing against the pre-existing paint on the sneakers. This is done in order to properly achieve taking the paint off
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Title: Staining Introduction: Microorganisms are small and colorless‚ invisible to unaided eyes. When observing them under microscopes‚ we use various methods to make microbes apparent. One of the most important methods is staining. Staining techniques play an essential role in the studying of microorganisms; they help to reveal characteristics of microbes‚ such as their morphologies‚ sizes‚ arrangements‚ chemical components and many more. The purposes of the experiments are to be
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11. Account for the fact that ethylene glycol (HOCH2CH2OH) is less viscous than glycerine (HOCH2CHOHCH2OH)‚ but more viscous than ethyl alcohol (CH3CH2OH). 20. Consider the following substances: sodium fl uoride (NaF)‚ chlorine monofl uoride (ClF)‚ hydrogen fl uoride (HF)‚ and fluorine (F2 ). (a) What type of particles does each substance have? (b) What type of intermolecular attractive forces hold the particles together in each substance? The table below lists the melting point (mp)‚
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those natural sources that trimyristin is easily extracted from it does take some time to achieve in lab. Ground nutmeg seeds are extracted with methyl ether and the resulting solid recrystallized from acetone and to yield pure trimyristin. Most of the other components of Nutmeg remain in the acetone as they are ether soluble. The hydrolysis of trimyristin follows acidification and yields glycerol and myristic acid. After the myristic acid is collected we will be using its melting point to determine
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I. Abstract: By manipulating the ideal gas law (PV=nRT)‚ we will be determining the molar mass of an unknown volatile liquid. Heating a flask filled with an unknown‚ easily evaporated liquid will allow for measurements that can be taken to work out the ideal gas equation. This lab will require knowledge of basic equations used in chemistry. Using these equations‚ such as density and number of moles(n)‚ we can substitute different values into the ideal gas law to manipulate it.
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molecules or ions surrounding it. These can be considered to be attached to the central ion by co-ordinate (dative covalent) bonds. The molecules or ions surrounding the central metal ion are called ligands. Simple ligands include water‚ ammonia‚ acetyl acetone and chloride ions. Ligand has active lone pairs of electrons in the outer energy level. These are used to form co-ordinate bonds with the metal ion. All ligands are lone pair donors. In other words‚ all ligands function as Lewis bases. Lewis acid-base
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CHEM%2315%Fall%2014% Creating useful and beautiful molecules using synthetic organic chemistry – Synthesis of Aspirin and Indigo INTRODUCTION Aspirin Salicylic acid occurs naturally in the bark of willow trees. Prior to the 1800’s‚ willow bark was often brewed into a tea‚ or chewed to relieve pain. While the salicylic acid is effective at reducing pain it was found to irritate the lining of the stomach. It was mostly by chance that on August 10‚ 1897 Felix Hoffmann‚ a German chemist who obtained
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a set up that includes a Hirsch funnel‚ and then rinsed with 9.8 mL of hot water and 5.0 m of ice-cold 95% ethanol. Once rinsed‚ the solids were then recrystallized with a 1:3 ratio of ethanol:acetone; which include 10 mL of ethanol and 20 mL of acetone‚ giving us a total volume of 30.0 mL. Once the 1:3 ratio of ethanol:acetone was added‚ the crude produce is then dissolved by heating the solution on hotplate with the heat knob on about 3-4‚ so as to not overheat the product. Once fully dissolved
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2. A single tube of cerebrospinal fluid is received in the laboratory and the following tests requested: total protein‚ albumin‚ IgG quantitation‚ microbial culture‚ Gram stain‚ leukocyte count and differential cell count. The specimen should be sent to the various laboratories in which order? a. Chemistry lab‚ hematology lab‚ microbiology lab b. Hematology lab‚ chemistry lab‚ microbiology lab c. Microbiology lab‚ hematology lab‚ chemistry lab d. Hematology lab‚ microbiology lab‚ chemistry
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