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Diseases Exposed: ESR Test in the Classroom
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Educational Use
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Students demonstrate the erythrocyte sedimentation rate test (ESR test) using a blood model composed of tomato juice, petroleum jelly and olive oil. They simulate different disease conditions, including rheumatoid arthritis, anemia, leukocytosis and sickle-cell anemia, by making appropriate variations in the particle as well as in the fluid matrix. Students measure the ESR for each sample blood model, correlate the ESR values with disease conditions and confirm that diseases alter blood composition and properties. During the activity, students learn that when non-coagulated blood is let to stand in a tube, the red blood cells separate and fall to the bottom of the tube, resulting in a sediment and a clear liquid called serum. The height in millimeters of the clear liquid on top of the sediment in a time period of one hour is taken as the sedimentation rate. If a disease is present, this ESR value deviates from the normal, disease-free value. Different diseases cause different ESR values because blood composition and properties, such as density and viscosity, are altered differently by different diseases. Thus, the ESR test serves as a real-world diagnostic screening test to identify indications of the presence of any diseases in people.

Subject:
Career and Technical Education
Chemistry
Physical Science
Physics
Material Type:
Activity/Lab
Provider:
TeachEngineering
Author:
Renuka Rajasekaran
Date Added:
02/03/2017
From Raw Materials to Concrete: The Science of Portland Cement Manufacturing
Conditional Remix & Share Permitted
CC BY-NC-SA
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In this comprehensive unit, titled "From Raw Materials to Concrete: The Science of Portland Cement Manufacturing," students will embark on a fascinating exploration of the entire process of Portland cement production. They will delve into the fundamental aspects of Portland cement, including its definition, constituents, functions, and various types. Students will also explore the processes involved in cement manufacturing, focusing on both the wet and dry methods. They will differentiate between these production processes, analyzing their advantages, and disadvantages. 

Subject:
Applied Science
Architecture and Design
Engineering
Environmental Science
Technology
Material Type:
Unit of Study
Author:
Lotachukwu Ernest Eze
Date Added:
03/22/2024