The effects of osmosis on potatoes placed in different salt concentration Introduction: Osmosis is a movement of water across a semi-permeable membrane. This may only happen when there is a difference in concentration between the two sides of the membrane. The water moves from low concentrations to high concentrations. That is because the low concentrated area tries to dilute the opposite via osmosis. The effects osmosis has on a cell are either that it becomes turgid and hard as water enters
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molecules through a partially permeable membrane into a region of higher solute concentration‚ in order to equalize the solute concentrations on the two sides. We didn ’t know anything about osmosis except that it was a word in the dictionary that we never picked up. Osmosis and diffusion are similar because osmosis is the result of diffusion across a semi-permeable membrane. If two solutions of different concentration are separated by a semi-permeable membrane‚ then the solvent will most likely to
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Reasonable conclusion with justification 2. Evaluation of weaknesses & limitations 3. Realistic relevant improvements Quantitative Data: Volume Hydrogen Chloride Solution with a concentration of 0.05 mol/dm3 used to neutralize Calcium Hydroxide with unknown concentration Trial: Initial Volume (v/cm3) ± 0.05 cm3 Final Volume (v/cm3)±0.05 cm3 Volume Hydrochloric Acid Used (v/cm3)±0.1 cm3 Volume of Calcium Hydroxide Used (v/cm3) +0.1 cm3 1 38.65 47.10 8.45 10.0
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hypertonic and isotonic solutions affect the mustard green ? HYPOTHESIS : An increase the concentration of solutions ‚ as decrease the percentage of change in most of mustard green . MANIPULATED VARIABLE : The concentration of solution . RSEPONDING VARIABLE : Percentage of change in mass . CONTROL VARIABLE : Initial mass of mustard green . APPARATUS AND MATERIAL : Mustard green ‚ solution of sucrose with concentration of 0.5% ‚ 1.0% ‚ 1.5% ‚ 2.0% and 2.5% ‚ filter paper ‚ cork borer ‚ knife ‚ beaker
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2.3. Membranes and modules for forward osmosis: 2.3.1. FO Membranes Generally‚ any dense‚ non-porous‚ selectively permeable material can be used as a membrane for FO. Such membranes have been tested (in flat sheet and capillary configurations) in the past for various applications of FO. In early studies‚ the researchers applied various FO membrane materials‚ including bladders of pigs‚ cattle‚ and fish; collodion (nitrocellulose); rubber; porcelain; and goldbeaters’ skin [36]. By 1960‚ Loeb and
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is about finding the time it takes for a solution of neutrase and milk to clear when using different concentrations of neutrase. Why did I choose to experiment on how the concentration of neutrase effects the time a milk solution takes to clear? I could have chosen to test how the reaction times differed at different temperatures‚ but I chose to experiment on the effect different concentrations of enzymes. The reason I did this was because I felt that it would be very hard to control the exact
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Michele Liveley Arkansas State University Mountain Home Mountain Home‚ AR September 2013 Osmosis Egg Lab Report Introduction Osmosis is the passing of water or other solutions from an area of high concentration of particles to an area of less concentration. The cell membrane is an organelle‚ selectively permeable‚ and only allows certain materials to pass through; it can allow smaller molecules to pass while blocking larger molecules. Molecules that are blocked can be moved
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that demonstrates osmosis occurring either in the human body or in the environment. Answer: Diffusion is molecules moving from an area of high concentration to an area of low concentration. For example‚ ammonia molecules have a powerful odor. When a stopper is removed from a beaker containing ammonia‚ the molecules move from the area of high concentration diffusing
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matter is made of atoms and molecules. Diffusion Diffusion‚ also called molecular diffusion‚ is the process by which molecules of a given substance move from an area of relatively high concentration to an area of lower concentration. When the molecules have diffused so that they are in a uniform concentration‚ this state is called equilibrium. This phenomenon plays a key role in many disciplines of biology‚ physics‚ and chemistry. It is closely related to the way in which cells take up nutrients
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Background and Aims: An agonist produces a physiological response upon binding to a receptor while an antagonist inhibits agonist-mediated responses. It is reported that muscarinic acetylcholine receptors‚ located on the ileum of the small intestine‚ initiate contractile activity when an agonist (acetylcholine) is present. The purpose of this study was to examine the effects of a competitive antagonist (atropine) on the muscarinic acetylcholine receptors. Methods: The isolated guinea pig ileum
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