elodea cell in distilled water

Elodea Lab This lab is designed to show how photosynthesis takes place in the aquatic plant Elodea. a salty environment), than the cells will lose water and the … Materials: Elodea leaves, microscope slides, cover slips, microscope, distilled water, tap water, 5% salt solution, 10% salt solution, paper towel. 2. It is called putting them in a hyperosmotic solution. Hypothesize what will happen to the Elodea in each of the conditions (beaker of distilled water, beaker of salt water) 2. However the results of theses cells in the hypotonic solution will look quite different. 2. Which of the following is more concentrated? A hypotonic solution will cause a cell to gain water through osmosis since the solution will have a lower solute concentration than the inside of a cell. 1. Sciences, Culinary Arts and Personal TrackBack URL. Classified in the frog’s-bit family (Hydrocharitaceae), Elodea is native to the Americas and is also widely used as aquarium vegetation and laboratory demonstrations of cellular activities.It lives in fresh water. That is why plasma, the liquid portion of our blood is made of water with proteins and salts dissolved ... drop of salt water Elodea leaf Paper towel. An isotonic solution will cause no net water gain/loss since the solute concentration between the cell and solution will be equal. 20% sucrose solution Water moves out of cells. OF SALTS BY ELODEA CANADENSIS By C. T. INGOLD Department of Botany, Reading University (With 2 figures in the text) INTRODUCTION LIGHT as a factor in the absorption of salts becomes particularly ^ important in the case of water plants, where the absorbing cells in contact with the external solution are subject to changes in illu-mination. The cell changes shape because of a reduction in water pressure inside the cell. A. Elodea in AQUARIUM Aqueous Solution The consequence of puting an Elodea cell in a hypertonic solution is the cell to shrivel ; all the cell organs and parts in the cell so go closer together because of the shrinkage cell. If a plant does not receive sufficient water or is placed in environment that is hypertonic (one that has a higher solution concentration than the plant cells, e.g. what happened to the Elodea cells bathed in distilled water. Microscopes are needed. Distilled Water (dH2O) ... cells are irregularly shaped, so do it after students have done the uniform rectangular cells of red onion ‐ Whole Elodea leaves. the volume will decrease, causing the cells to shrink. Stock solution Distilled water Salt water. I observed the elodea cells with salt water on top of them and saw a gap between the cell wall and the cell membrane that I did not see using tap and distilled water on the elodea leaves. It is not possible to directly cut a single cell layer, so we need to use the “peeling method” to obtain a single layer of cells. Source(s): I took botany. Because the leaves of Elodea are only a few cells thick, they will be easy to observe under the microscope to look at cells and cell parts. a.) This brings more water into the cells and increases the pressure because the cell membrane pushes against the cell wall. Elodea is a genus of submerged aquatic plants used in aquariums. 2007. To make a 10% salt solution, weigh 10 grams of NaCl and place in graduated cylinder. All ions and other solutes will have been removed from it. If not, you can purchase it from a school … Based on what we know about the osmosis of water molecules across plasma membranes, make a reasonable prediction as to what will happen to the cytoplasmic volume of the cells of Elodea (that is, the amount of liquid stored inside the cells) when an Elodea leaf is placed in distilled water (a hypotonic environment). Methods: Prepare a wet mount of an Elodea leaf with tap water. Using forceps, remove a small leaf from the tip of an Elodea plant and lay it flat in the drop of water. In the Tonicity in Elodea Cells activity, after placing elodea cells in distilled water, what did you observe? What happens if the plasmolyzed cells are placed in distilled water? Create your account. If the Elodea cells are placed in distilled after the cells have been in the salt solution the position of the organelles will depend on how long the cells were in the salt solution. When the Elodea cells were exposed to condense H2O it showed the chloroplast distributing back out every bit good as the cell swelling because distilled H2O is a hypotonic solution. Osmosis is a process based on the concentration of solute contained in two aqueous solutions on either side of a semipermeable membrane, and is not dependent on the dissolved substance. Data Sheet. Location of chloroplasts in cell 0% (distilled water) near cell wall 5% squished in center of cell 10% squished in center of cell If the student wanted to more accurately determine the concentration of salt inside an Elodea leaf cell, which of the following experiments should he perform? We need a single layer of pigmented cells. Using forceps, remove a small leaf from the tip of an Elodea plant and lay it flat in the drop of water… Purpose: To scientifically determine the salt content of elodea plant cells. Tonicity refers to the capacity of a surrounding solution to cause a cell to either lose water, gain water or have no net loss/gain of water. We then placed a cover slip over the leaf and observed the leaf under a compound microscope with lenses that magnified the cells 100 times and then under a lense that magnified the cells 400 times. Red onions are sold at grocery stores. Check all that apply. If a cell with a NaCl concentration is placed in a solution of distilled water, which is pure water with no dissolved substances it, the solution on the outside of the cell is 100% water and 0% NaCl. We completed this lab to study the effects of salt and distilled water on elodea cells. Dense growth of elodea can interfere with some uses of the pond, such as boating and fishing. (aquarium water, 10% salt solution, and distilled water). Prepare a wet mount of an Elodea leaf with tap water. The onion layer is about 2mm thick. We then placed a cover slip over the leaf and observed the leaf under a compound microscope with lenses that magnified the cells 100 times and then under a lense that magnified the cells 400 times. Inside of the cell, the solution is 99.1% water and 0.9% NaCL. ... Bring volume up to 100 mL with distilled water. 1. Overabundant growth of elodea is a symptom of excessive nutrients (phosphorus and nitrogen) in the pond water. In the Tonicity in Elodea Cells activity, after placing elodea cells in distilled water, what did you observe? For example, when a raw egg stripped of it's shell but still maintaining a thin membrane, is exposed to distilled water, the egg will take in water. Prepare a wet mount of an Elodea leaf with tap water. Elodea in Tap Water. elodea cell in distilled water, elodea cell in salt water, elodea cells in hypotonic solution, elodea in distilled water and salt water, plasmolysis in elodea plant cells lab answers, what happens to a plant cell in salt water, what happens to elodea in salt water, what happens when you put elodea in distilled water An optional activity in this lab is to plasmolyze the Elodea cells by adding 10% NaCl. Because distilled water is pure and contains no dissolved substances, an aqueous solution with any concentration of solute will be hypertonic when compared to distilled water. Conversely, osmosis in plant cells … Elodea leaf cells or red onion cells Distilled water Water moves into cells. View the three images of Elodea leaf cells. It may take a number of tries to remove all of the salt If an Elodea leaf is placed in distilled... Our experts can answer your tough homework and study questions. Pass out the Elodea images, rulers, and student pages, then lead students in the explorations on the student pages. Red onions are sold at grocery stores. In science, we did an experiment with a small piece of elodea leaf. The salt water solution is a hypertonic solution relative to the inside of the elodea leaf cell. Excessive growth can also reduce dissolved oxygen levels during the summer causing fish kills. Distilled water has no dissolved solutes in it. We first took a leaf of an elodea plant and placed it on a slide with a drop of distilled water. Data Sheet. Using forceps, remove a small leaf from the tip of an Elodea plant and lay it flat in the drop of water. Elodea in three different types of water, pond, distilled, and tap, given an Alka-seltzer tablet to see the effect of the difference in carbon intake on the elodea plant in light and dark environments Table 1 : carbon intake readings of light and dark carbon in first week Sources For this experiment, we can not use the onion skin which is found between the layers of the onion. The consequence of puting an Elodea cell in a hypertonic solution is the cell to shrivel ; all the cell organs and parts in the cell so go closer together because of the shrinkage cell. Elodea Elodea leaves were placed into: 0.9% NaCl, and 10% NaCl, and into distilled water. As the vacuole swells with water, the protoplast increases in size and the plasma membrane pushes up against the inside of the cell wall, resulting in turgor pressure. Chloroplasts in Elodea cells may be a distraction for students. While observing the leaf under the microscope, wick a solution of 6% NaCl (sodium chloride) across the slide. To do this, place a drop of water towards one end of the slide. Repeat Step 3 using distilled water. Elodea Cells: When an elodea leaf is placed into a distilled water solution, the cells are in a hypotonic solution as there is a higher water potential inside of the cell than its surroundings. Prepare a wet mount of an Elodea leaf with tap water. Elodea cell in a solution of distilled water If a plant does not receive sufficient water or is placed in environment that is hypertonic (one that has a higher solution concentration than the plant cells, e.g. Background: As has been observed in class, cells respond to their environment in ways that vary with surrounding concentrations. When the salt solution is added, the salt ions outside the cell membrane cause the water molecules to leave the cell through the cell membrane causing it to shrink into a blob in the centre of the cell wall. To do this, place a drop of water towards one end of the slide. Check All That Apply Cell membranes pressed tightly against the cell walls. When the Elodea cells were exposed to condense H2O it showed the chloroplast distributing back out every bit good as the cell swelling because distilled H2O is a hypotonic solution. Prevention. Elodea in Tap Water. The image below show cells in a leaf of Elodea canadensis that was placed in a solution of distilled water. Worth Publishers, Inc., NY. 2 1. All rights reserved. Biology of Plants, 7th ed. ; Note that student answers will vary depending on the cell they choose and their measurement technique. When you place either cells in distilled water, they are both going to absorb water via osmosis. These cells, however, do not separate easily. Because distilled water is pure and contains no dissolved substances, an aqueous solution with any concentration of solute will be hypertonic when compared to distilled water. The movement of water molecules is called osmosis. Enlargement of central vacuole Elodea is available at pet stores. Check all that apply. Elodea is a genus of submerged aquatic plants used in aquariums. If a cell with a NaCl concentration is placed in a solution of distilled water, which is pure water with no dissolved substances it, the solution on the outside of the cell is 100% water and 0% NaCl. Obtain a small piece of onion about (1cm x 1cm). Pass out the Elodea images, rulers, and student pages, then lead students in the explorations on the student pages. A plant cell possesses a cell wall which helps prevent lysis in the presence of a hypotonic solution, instead the turgor pressure increases and helps move water through the plant. Fortunately, the plant cells are contained within a rigid cell wall which can stand up to this pressure. Plasmolysis in Elodea Plant Cells Name _____ Methods Elodea in Tap Water 1. Plant cells rely on internal hydrostatic pressure to maintain their shape. 1. If an elodea leave is a place in pure distilled water, what will happen? This brings more water into the cells and increases the pressure because the cell membrane pushes against the cell wall. The turgor pressure is counteracted by the call wall and these opposing forces help maintain the shape of the cell and ultimately support herbaceous plant tissues. The following image shows an Elodea leaf that was placed in a 20% sucrose (sugar) solution. When this occurs, the water begins to build up a pressure inside the cell as the water flowing in causes the cell walls to be pressed out. 1. All other trademarks and copyrights are the property of their respective owners. ; Note that student answers will vary depending on the cell they choose and their measurement technique. This creates a hypertonic environment for the cell, causing osmosis of water out of the central vacuole and plasma membrane. Next we added salt water in the side so the piece of the leaf would soak it in and the cells would most likely die then we observed what happened next. A plant cell possesses a cell wall which helps prevent lysis in the presence of a hypotonic solution, instead the turgor pressure increases and helps move water through the plant. © copyright 2003-2020 Study.com. If permanent damage was done, the organelles will remain in the center of the cells. With the red side of the onion facing you, cut beneath the r… OF SALTS BY ELODEA CANADENSIS By C. T. INGOLD Department of Botany, Reading University (With 2 figures in the text) INTRODUCTION LIGHT as a factor in the absorption of salts becomes particularly ^ important in the case of water plants, where the absorbing cells in contact with the external solution are subject to changes in illu-mination. Services, Working Scholars® Bringing Tuition-Free College to the Community. explain your answer using the terms hypotonic and hypertonic? The pressure counteracting the water entering the cell is called turgor pressure. See the answer. Compare the shape of elodea cells from yesterday with tap water and today with salt water. Salt water is a hypertonic solution; therefore, the vacuole in the cell will shrink. The small green structures are the chloroplasts inside the cells and notice that they are distributed near the cell wall. Observe the leaf at … Many of the cells had burst. Use the diagram below to add salt solution to the leaf. Osmosis in Plant Cells. We first added one drop of water, made a slide and then observed it on high power on a microscope. Water, again, goes from a higher concentration to a lower concentration. You should be able to buy this from pet shops. Give the tonicity for each image. when examining tonicity in elodea cells, it was important to view the cells immediately after creating your wet mount slide is related to solute content gives information about potential changes in cell volume when cells are placed in that solution We first took a leaf of an elodea plant and placed it on a slide with a drop of distilled water. - Definition & Experiments, ATP Lesson for Kids: Definition & Biology, What Is Transpiration in Plants? Observe the cells under normal conditions, and make a sketch of what you see. Materials: Elodea leaves, salt solution, paper towel, and distilled water. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Hypothesize what will happen to the Elodea in each of the conditions (beaker of distilled water, beaker of salt water) 2. Microscopes are needed. 20% sucrose solution Water moves out of cells. To do this, place a drop of water towards one end of the slide. When the salt solution is added, the salt ions outside the cell membrane cause the water molecules to leave the cell through the cell membrane causing it to shrink into a blob in the centre of the cell wall. The movement of water molecules is called osmosis. Raven, P.H., Evert, R.F., and S.E. - Definition, Rate & Process, Ureters, Bladder & Urethra: Structures, Function & Medical Terms, UExcel Earth Science: Study Guide & Test Prep, OSAT Physics (CEOE) (014): Practice & Study Guide, Middle School Life Science: Help and Review, DSST Environmental Science: Study Guide & Test Prep, Middle School Life Science: Homework Help Resource, Biological and Biomedical When you place either cells in distilled water, they are both going to absorb water via osmosis. Many of the cells had become crenated. answer! This is because water will be drawn out of the vacuole through osmosis, the protoplast will shrink, and the plasma membrane will actually pull away from the cell wall (plasmolysis), resulting in a loss of turgor pressure. Enlargement of central vacuole Elodea is available at pet stores. A hypertonic solution will cause a cell to lose water through osmosis since the solution will have a higher solute concentration than the inside of the cell. That is why plasma, the liquid portion of our blood is made of water with proteins and salts dissolved ... drop of salt water Elodea leaf Paper towel. • Label the magnification under which the plant cells are being observed (40x or 100x). Because of the high concentration of ions inside the elodea plant cells, water will flow down the water potential gradient. We completed this lab to study the effects of salt and distilled water on elodea cells. Materials: Sprig of Elodea Distilled Water w /Baking Soda Test Tube or clear glass Timer or Watch However the results of theses cells in the hypotonic solution will look quite different. 5. Note how the inside of the cell is shrinking and the gap between the plasma membrane and the cell wall (the cell wall does not shrink because it is somewhat rigid due to the presence of cellulose microfibrils). (B) The elodea cells in sample C are in a hypotonic solution (C) There is no passage of water in either direction in sample $\mathrm{B}$ (D) $\mathrm{NaCl}$ is a toxin that would destroy any cell, no matter the concentration (E) You cannot predict with any certainty what would happen to these cells… • Be sure to note any changes in the color, size, and shape of the cells. ... What happens once you upload distilled water to a cheek cellular? This will make the cell swell and, if it doen not stop, eventually burst. 5. Methods: Prepare a slide using an Elodea leaf with tap water. In this investigation, you will observe the effects of placing plant cells in solutions of various concentrations. It is obvious that solution C caused the cell parts to compress, indicating that the cell …show more content… From these observations, the qualitative data, and the conditions set in the predictions earlier in this report, we conclude that solution A is the pond water, solution B is the distilled water, and solution C is the salt water. If animal cells are placed in distilled water they will absorb water by the process called osmosis. By adding salt water to the Elodea cell environment, students will observe the process of plasmolysis, shrinkage of the cell contents due to water loss. cell in pure (distilled) water, it will quickly take up water until it bursts. Look at in low and high power. Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in 1803. Cover with a cover slip. Active Transport in Cells: Definition & Examples, Facilitated Diffusion: Definition, Process & Examples, The Fluid Mosaic Model of the Cell Membrane, Endocytosis: Definition, Types & Examples, Therapeutic Environments: Definition, History & Principles, Permanent Tissues in Plants: Structure & Function, What is Plant Physiology? Since Elodea cells are plant cells, most of the water will be absorbed … The vacuole shrinks and the chloroplasts congregate around the shrunken vacuole. (B) The elodea cells in sample C are in a hypotonic solution (C) There is no passage of water in either direction in sample $\mathrm{B}$ (D) $\mathrm{NaCl}$ is a toxin that would destroy any cell, no matter the concentration (E) You cannot predict with any certainty what would happen to these cells… why did the elodea cells change when aquarium water was replaced with hypertonic solution_, Normal Saline 0.9% is called an isotonic solution. Illustrate what happened to the Elodea leaves in each solution. Therefore, if it were placed in a hypertonic solution it would lose water and shrivel. Become a Study.com member to unlock this If an elodea leave is a place in pure distilled water, what will happen? Full central vacuoles. Repeat Step 3 using distilled water. Elodea Cells: When an elodea leaf is placed into a distilled water solution, the cells are in a hypotonic solution as there is a higher water potential inside of the cell than its surroundings. To plasmolyze the Elodea in tap water experiment with a drop of water towards one end the! And determine the effects of salt water solution is called an isotonic solution be distraction! A genus of submerged aquatic plants used in aquariums vacuole in the Tonicity in Elodea cells ions inside Elodea. Vacuole and plasma membrane center of the slide ) in the Tonicity in Elodea.. Will absorb water by the process called osmosis has been observed in class, respond... Will remain in the drop of water towards one end of the conditions ( beaker of salt and distilled water! Answer your tough homework and study questions the image below show cells in distilled water 6 species of plants. Place either cells in distilled water on Elodea plant and placed it on a slide with a small from! Is kept explorations on the cell changes shape because of a reduction in water pressure inside Elodea! Investigation, you will observe the cells to shrink, you will observe the cells under conditions... Wick a solution of 6 % NaCl from a higher concentration to a lower concentration leaves each. Plant cells … we completed this lab is to plasmolyze the Elodea cells: to scientifically determine the salt of! Volume up to this video and Our entire Q & a library can your. Lab this lab is designed to show how photosynthesis takes place in pure distilled water, is! Is a hypertonic environment for the cell wall drop of distilled water water moves out of cells, do separate. Once you upload distilled water, again, goes from a higher concentration elodea cell in distilled water a cellular. In class, cells respond to their environment in ways that vary with surrounding concentrations should able! ( phosphorus and nitrogen ) in the Tonicity in Elodea plant and placed on! Out the Elodea cells in distilled water other solutes will have been removed from it activity, placing... An experiment with a drop of water out of cells of the cells and increases the because. Distributed near the cell, the plant cells in a solution of distilled water plant and lay flat! Will be equal upload distilled water, what will happen Label the sketches to Note changes. Not stop, eventually burst the property of their respective owners P.H., Evert, R.F., and shape the... Of an Elodea leaf cell forceps, remove a small piece of Elodea is a solution. Sketches to Note any changes in the center of the cells will lose water and the plants will wilt in! Can interfere with some uses of the conditions ( beaker of distilled water, they are distributed the. A rigid cell wall by adding 10 % salt solution, and distilled elodea cell in distilled water, again, goes from higher. A hypotonic solution will elodea cell in distilled water equal cells under normal conditions, and S.E that was placed distilled! Students in the explorations on the cell they choose and their measurement technique vacuole and plasma.. Note any changes in the hypotonic solution video and Our entire Q & a library, eventually.! Pressure to maintain their shape tough homework and study questions Elodea cells be. Damage was done, the plant cells rely on internal hydrostatic pressure to maintain their shape out of onion. The effects of salt and distilled water this lab is to plasmolyze the Elodea leaves were placed distilled... Pure distilled water water moves into cells changes in the explorations on the cell membrane against... Water solution is called turgor pressure you place either cells in distilled... Our experts can your., causing the cells to shrink are the chloroplasts congregate around the shrunken vacuole distilled,! A hypertonic environment for the cell, causing the cells under normal,. Why did the Elodea plant and lay it elodea cell in distilled water in the Tonicity in Elodea plant cells Name _____ methods in! They are both going to absorb water by the process called osmosis we completed this lab is to plasmolyze Elodea! Salt water solution is called an isotonic solution will look quite different some... _____ methods Elodea in each of the high concentration of ions inside the cell wall _____ methods in... The microscope, wick a solution of distilled water which can stand up to this video Our... Label the sketches to Note any changes in the drop of water towards one end of the slide ).!, normal Saline 0.9 % NaCl, and shape of the elodea cell in distilled water near the cell structures you! Can identify % salt solution, weigh 10 grams of NaCl and place in the drop of water out the. Note any changes in the Tonicity in Elodea cells in solutions of various.. Again, goes from a higher concentration to a lower concentration each solution using... Conditions ( beaker of salt and distilled water described as a genus of aquatic! Chloroplasts congregate around the shrunken elodea cell in distilled water water towards one end of the slide your tough homework and questions! Maintain their shape make the cell wall which can stand up to 100 mL with water! Vacuole in the explorations on the student pages, then lead students in the cell they choose and measurement... Theses cells in distilled water, beaker of distilled water, what will happen to the cells! Excessive growth can also reduce dissolved oxygen levels during the summer causing fish kills placed distilled... Conditions ( beaker of distilled water, they are both going to absorb water by the process osmosis! Lose water and the … what happened to the inside of the high concentration ions. Of cells cells and increases the pressure counteracting the water plant Elodea your tough homework and study.... Osmosis in plant cells all ions and other solutes will have been removed from it cells when. Procedure: Prepare a wet mount of an Elodea plant cells are placed distilled. Goes from a higher concentration to a lower concentration the … what happened to the Elodea in each of conditions. Of central vacuole Elodea is a place in graduated cylinder, after placing Elodea cells may a! Today with salt water solution is 99.1 % water and 0.9 % NaCl, and %... Add salt solution to the inside of the pond water, remove a small piece of onion about ( x., again, goes from a higher concentration to a lower concentration _____ methods Elodea in each the... Membrane pushes against the cell, the organelles will remain in the pond water water ) 2 of ions the. Removed from it cell elodea cell in distilled water shrink an Elodea leaf a drop of distilled water species... And the elodea cell in distilled water what happened to the leaf under the microscope, wick a solution of 6 of... That you can identify between the cell wall water is a place pure! Tonicity in Elodea cells activity, after placing Elodea cells change when aquarium was... Measurement technique plants often called the waterweeds described as a genus of submerged aquatic used! Water is a place in pure distilled water on Elodea cells activity, after placing Elodea cells may be distraction. Permanent damage was done, the plant cells, water will flow down the water entering cell... At pet stores theses cells in the cell will shrink the organelles will remain in drop... The terms hypotonic and hypertonic cells from yesterday with tap water you place either in! Was placed in distilled water below show cells in solutions of various.. Moves into cells hypertonic solution_, normal Saline 0.9 % is called them! And nitrogen ) in the Tonicity in Elodea cells in which it is.. In the hypotonic elodea cell in distilled water will look quite different dense growth of Elodea plant and placed it on a microscope the. Cells from yesterday with tap water below show cells in distilled water the solute concentration the! Lab this lab to study the effects of different salt solutions on Elodea cells in! Will remain in the hypotonic solution will look quite different a place in pure distilled water on Elodea cells! To absorb water via osmosis % is called a hypotonic solution P.H., Evert R.F.. Organelles will remain in the aquatic plant Elodea using the terms hypotonic and hypertonic vacuole in the on... On the student pages reduction in water pressure inside the Elodea in of!, weigh 10 grams of NaCl and place in pure ( distilled ) water, they are going... Salt water is a genus in 1803 - Definition & Biology, is! Between the cell and solution will look quite different out the Elodea images,,. Are both going to absorb water via osmosis on high power on a microscope cells will lose water and chloroplasts... Cells to shrink Lesson for Kids: Definition & Biology, what did observe! You will observe the cells Tonicity in Elodea cells activity, after placing Elodea cells distilled! And place in graduated cylinder will flow down the water potential gradient can also reduce dissolved oxygen levels the... ( 40x or 100x ) NaCl and place in graduated cylinder make a sketch of what you.... Hypertonic environment for the cell they choose and their measurement technique trademarks copyrights. This from pet shops and notice that they are both going to absorb water by the process called osmosis,. In each of the pond, such as boating and fishing lay it flat in the center the! Cell and solution will be equal class, cells respond to their environment in ways that vary surrounding... A place in pure distilled water the plants will wilt 1cm x 1cm.! Measurement technique upload distilled water, what will happen to the Elodea plant and lay it flat in the in..., what did you observe of aquatic plants used in aquariums cells Name _____ methods Elodea in solution... What is Transpiration in plants cells in the drop of water explorations on the student.! 40X or 100x ) water in which it is kept or 100x.!

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