interior and exterior of the cell. The second type is active processes which use energy known as ATP to power the transport. There are two main types of passive processes called diffusion and filtration. This can be split into different types such as simple diffisuion‚ facilitated diffusion‚ osmosis and filtration. The objective of these experiments is to provide information on the passage of solutes and water through semi permeable membranes and relate them back to the study of actual living membranes
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To prevent the previously discussed risks related to the equipment and substances used in the synthesis reaction‚ safety procedures were discussed with the teacher‚ the fume cupboard was used‚ hands were washed‚ correct disposal procedures were followed‚ Disinfectant was used to wipe down benches‚ no flammable or loose clothing was worn‚ long hair was tied back‚ no naked flames were used‚ the safety shower and eye bath was available‚ first aid facilities were available‚ required spill management
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Activity- 6 3.5 Determination of pH Optimum 6 3.6 Determination of Michaelis-Menten Constant 7 3.7 Ammonium Sulphate Fractionation 7 3.8 Gel Filtration on Sephadex 7 3.9 Chromatography on DEAE-cellulose 7 4 Results 8 4.1 Freshly Prepared Crude 8 4.2 Crude Thawed after a Week of Freezing 9 4.3 Sephadex 25 Gel Filtration 11 4.4 Determination of Optimum pH 12 4.5 Ion Exchange Chromatography 13 4.6 Michaelis-Menten Kinetics 13 5 Discussion and Conclusion 14 6
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Chemistry: All About You Module 6. Hands on activities: Water experiments CONTENTS Module 6. Hands on activities: Water experiments ................................................................... 2 1. Filtration ............................................................................................................................ 3 2. Solar Still challenge .......................................................................................................... 5
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The author of this article basically asserts that whether a person be playing chess or tennis‚ the brain is utilized in a similar manner between aspects that require knowledge and the ones that seemingly don’t. In the article‚ elite athletes are used as examples to show how they easily use just as much brain power as the champion for professional checkers does. In athletics‚ the players need to be able to keep their A game‚ and get in the “zone”; in entering their zones‚ the brain manipulates a part
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Jennie K. Daniels Organic Chemistry 2121 11 February 2014 Synthesis of Aspirin Salicylic acid derivatives‚ or salicin‚ are found in the bark of the willow tree. In the 5th century B.C.‚ Hippocrates ground the bark into a powder‚ and later‚ the Natives Americans chewed on the bark to alleviate fever and pain1. In the 19th century‚ a German chemist by the name of Felix Hoffman wanted to find a medication that would ease
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such as extraction‚ evaporation‚ and filtration‚ the three components will be isolated based on their solubilities and acid-base properties. The percent composition of Panacetin will also be deduced based on the masses of the three dried components; this is done to verify the composition attained is consistent with those listed on the preparations label. As a result of this investigation‚ my teammates and I allowed the Panacetin to undergo gravity filtration and separation techniques in order to
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Recrystallization and Melting Point of Benzoic Acid Organic Chemistry 1 10/4/12 Abstract Recrystallization was done to remove impurities from the sample. The percent recovery of benzoic acid during recrystallization is 23.02%. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure sample had a lower and wider melting point range of 120.1-122.2 (C). The pure sample melting point range was 121.3-122.5 (C). These ranges helped determine
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reduce cerebral edema to decrease ICP. Mannitol mechanism of action is to reduce ICP by drawing water from the brain parenchyma‚ does not cross brain-blood barrier (BBB). But also causes profound osmotic diuresis by increases the osmotic pressure of glomerular filtrate‚ inhibits tubular reabsorption of water and electrolytes‚ increases urinary output if renal failure or hypovolemia is a concern could be devastating to patient’s outcome. HTS mechanism of action is the same osmotic gradient in the BBB
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Melting point 1. What two effects do impurities have on the melting point of an organic compound? Soluble impurities affect the melting point of a solid in the following manner. a. The presence of an impurity in the molten compound reduces its vapor pressure thus lowering the melting point of the compound. b. Broaden the melting point range. 2. For what tow purpose are melting points routinely used a. To determine the identity of an organic solid. b. To determine the purity of an organic solid
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