Expt. 7. Sexual Plant Reproduction: Testing conditions required for pollen germination and tube growth ____________________________________________________________________________ File: pollen Modified from E. Moctezuma & others for BSCI 442 (Sze) Objectives: Get familiar with the parts of flowers: male and female organs Observe pollen germination and tube growth in real time. Test the conditions that stimulate pollen germination and tube growth. Observe cytoplasmic streaming (due
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The Brita Products Company began in 1988 under the recommendation of Charlie Couric‚ a marketing executive with the Clorox Company. Optimistic of its capability to be profitable‚ Clorox acquired the right to market the home water filtration system. Clorox‚ citing the overriding long-term benefits of continuous filter sales‚ initially engaged in deficit spending. Such measures paid off and Clorox not only created a $350 million market‚ but also captured 70% of the market revenue. Brita enjoyed success
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Experiment 2 Date: 24 January 2006 Title : Crystallization of a Crude Sample Objective : Preparation of pure diphenyl via crystallization of crude diphenyl dissolved in ethanol. Structural Formula of Organic Substances Involved : Diphenyl Ethanol Apparatus : Round-bottom flask (100 mL)‚ measuring cylinder (50 mL)‚ conical flask (50 mL)‚ filter flask‚ beaker (100 mL)‚ stemless glass funnel‚ Hirsch funnel‚ capillary tube‚ long glass tube‚ watch glass‚ glass vial‚ water condenser
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ABSTRACT Artificial Sweeteners are chemically engineered substances that are sweeter than carbohydrate sweeteners such as sucrose. Their sweetness can vary anywhere from 30 times sweeter to thousands of times sweeter than sucrose. They are used as a sugar substitute more commonly in food and beverages because of their low caloric features they bring to food. They can also be found in pharmaceutical medication and that is why the Food and Drug Administration needs to test and approve anything to
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paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases the speed of filtration. The crisscrossing of the folds help alleviate the pressure to make the flow of filtration faster. The
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4A.2 RRL 4A.2.1 Coagulation of Proteins Coagulation of protein refers to sticking together‚ like a blood clot‚ usually as a result of denaturation or coming out of solution due to abnormal ionic strength or a change of solvent. Definite characteristics of the proteins are changed when they are coagulated‚ among which is loss of solubility in water and dilute salt solutions. In some instances and under certain conditions the coagulation process may be reversible. (Campbell‚ et.al‚ 1979) 4A.2.2
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provide biological filtration and clean our system. You have three kind of filtration but the most healthy is biological. Others are chemical filtration‚ mechanical filtration (if you dont clean filters of mechanical filtration‚ after a while to be hold particulates rot and it makes dirty your aquarium). It means‚ Biological filtration is required to keep living. Chemical filtration is important to throw chemical harmful. Mechanical filtration is required to
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P H A R M AC E U T I C A L application note Checking the accuracy of PERKIN-ELMER POLARIMETERS H. Stenz‚ Bodenseewerk Perkin-Elmer GmbH Abstract Quartz standards‚ sucrose solutions and optically active pure liquids are discussed as potential polarimetry standards. It is suggested to preferably use quartz standards for checking the accuracy of Perkin-Elmer polarimeters. Quartz standards are absolutely stable‚ have a high accuracy and are easy to use. For laboratories working in an environment
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concentration affects osmotic pressure. The higher the solute concentration‚ the higher the osmotic pressure. Filtration 4. The following refer to Activity 4: Simulating Filtration. Using your results in Chart 4‚ which MWCO membrane had the greatest filtration rate? 200 MWCO Explain the relationship between pore size and filtration rate. The larger the pore size the greater the filtration rate. Which solute did not appear in the filtrate using any of the membranes? The powdered charcoal. What
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obtained material from the cell. This test measures for the salt content in the solution. In the glucose test‚ Benedict’s test is performed using a 1:1 ratio of Benedict’s test to solution. These tests for the glucose in each solution. Finally the sucrose/lactose test uses the same content as the glucose test. Benedict’s test is performed using a 1:1 ratio of Benedict’s test to solution. This test measures for reducing sugars. The indicator for each test is color. When there is a color change to the
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