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1. • Measure the rate of photosynthesis in plants

     

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     • Scientists have found an easy way to measure the rate of photosynthesis in plants. The procedure is called the floating leaf disk assay. In this plant biology project, you can use this procedure to investigate which factors affect the rate of photosynthesis.
     www.sciencebuddies.org/science-fair-projects/project-ideas/PlantBio_p053/plant-biology/photosynthesis-leaf-disk-assay

     Use Floating Leaf Disks to Study Photosynthesis

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   What is a floating disk assay?

   • The floating disk assay uses the rate at which oxygen is produced or consumed as a measure of the balance between the two reactions. Disks of leaf tissue are vacuum-infiltrated to replace intercellular air with liquid.

   Photosynthesis Study Technique - Flinn Sci

   www.flinnsci.com/globalassets/flinn-scientific/all-free-pdfs/dc10320.pdf

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   What is a floating disk assay for photosynthesis?

   • In the case of the Floating Disk Assay for Photosynthesis, we compared rates of photosynthesis with a carbon source (sodium bicarbonate) and without.

   The Floating Disk Assay to Study Photosynthesis–an update

   www.bradwilliamson.net/the-floating-disk-assay-to-study-photosynthesis-an-update/

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   Do assay disks float in a liquid environment?

   • The disks will float in a liquid environment if photosynthesis produces enough oxygen to buoy the disk in the liquid. The time required to get the disk to float provides a relative measure of the rate of photosynthesis. 6. Use the following general outline to assist students in designing an experiment using their assay disks.

   Photosynthesis Study Technique - Flinn Sci

   www.flinnsci.com/globalassets/flinn-scientific/all-free-pdfs/dc10320.pdf

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   Are floating leaf disk assays reliable?

   • The standard procedures such as counting oxygen bubbles generated by an elodea stem tend to not be “student” proof or reliable. This is a particular problem if your laboratory instruction emphasizes student-generated questions. Over the years, I have found the floating leaf disk assay technique to be reliable and understandable to students.

   The Floating Leaf Disk Assay for Investigating Photosynthesis - WPMU …

   cpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/3/1009/files/2015/09/Floating-Leaf-Disk-Brad-Williamson.pdf

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   What is a leaf disk assay?

   • The leaf disk assay measures the rate of oxygen production in the leaf disks, which is a representation for the rate of photosynthesis. When you placed the leaf disks in your syringe, you probably noticed that they all floated on top of the solution.

   Measure Photosynthesis with Floating Leaves | STEM Activity

   www.sciencebuddies.org/stem-activities/photosynthesis-floating-leaves

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   How do floating leaf disks measure the net rate of photosynthesis?

   • At any given point in this experiment, the number of floating leaf disks is an indirect measurement of the net rate of photosynthesis. In photosynthesis, plants use energy from the sun, water, and carbon dioxide (CO 2) from the air to store carbon and energy in the form of glucose molecules. Oxygen gas (O 2) is a byproduct of this reaction.

   Photosynthetic Floatation | Exploratorium

   www.exploratorium.edu/snacks/photosynthetic-floatation

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3. www.sciencebuddies.org › science-fair-projectsUse Floating Leaf Disks to Study Photosynthesis

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   The procedure is called the floating leaf disk assay. In this plant biology project, you can use this procedure to investigate which factors affect the rate of photosynthesis. Do you think the light intensity, type of plant, or the temperature matter?

4. www.bradwilliamson.net › the-floating-disk-assayThe Floating Disk Assay to Study Photosynthesis–an update

   www.bradwilliamson.net › the-floating-disk-assay

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   Sep 2, 2019 · For more than 25 years, I have promoted the floating leaf disk assay as one of the best ways for students to explore factors that affect photosynthesis. It’s replicable, it’s cheap, it’s accessible, and most of all it’s fun.

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     Catalase Floating Disc Assay

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     PHOTOSYNTHESIS LAB: Floating Leaf Disks: AP Biology

     Jan 11, 2022

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     sciencebuddies.org

     Study Photosynthesis with the Floating Leaf Disk Assay | Lesson Plan

     Oct 16, 2020

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6. cpb-us-e1.wpmucdn.com › blogs › distThe Floating Leaf Disk Assay for Investigating Photosynthesis

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   The Floating Leaf Disk Assay for Investigating Photosynthesis. Trying to find a good, quantitative procedure that students can use for exploring photosynthesis is a challenge. The standard procedures such as counting oxygen bubbles generated by an elodea stem tend to not be “student” proof or reliable.

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7. www.sciencebuddies.org › teacher-resources › lessonStudy Photosynthesis with the Floating Leaf Disk Assay

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   In this lesson plan, students will use the floating leaf disk assay to explore photosynthesis and the factors that affect photosynthesis rates.

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9. www.exploratorium.edu › snacks › photosyntheticPhotosynthetic Floatation | Exploratorium

   www.exploratorium.edu › snacks › photosynthetic

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   At any given point in this experiment, the number of floating leaf disks is an indirect measurement of the net rate of photosynthesis. In photosynthesis, plants use energy from the sun, water, and carbon dioxide (CO 2) from the air to store carbon and energy in the form of glucose molecules.

10. www.sciencebuddies.org › stem-activitiesMeasure Photosynthesis with Floating Leaves | STEM Activity

    www.sciencebuddies.org › stem-activities

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    The leaf disk assay measures the rate of oxygen production in the leaf disks, which is a representation for the rate of photosynthesis. When you placed the leaf disks in your syringe, you probably noticed that they all floated on top of the solution.

11. www.flinnsci.com › globalassets › flinn-scientificPhotosynthesis Study Technique - Flinn Sci

    www.flinnsci.com › globalassets › flinn-scientific

    The floating disk assay uses the rate at which oxygen is produced or consumed as a measure of the balance between the two reactions. Disks of leaf tissue are vacuum-infiltrated to replace intercellular air with liquid.