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**"Blood and Vampires: Fact or Fiction? The Chemistry of Vision and Halloween Myths"**

Explore the science behind vampire lore and the color vision mechanisms. Delve into the physiology of blood and its role in myths. Learn about Porphyria and its relation to vampires.

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**"Blood and Vampires: Fact or Fiction? The Chemistry of Vision and Halloween Myths"**

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  1. Halloween / All Hallows Eve Vampires & their thirst for blood.......Fact or Fiction?

  2. Light & The Chemistry of Vision Color of Blood & Vampires

  3. B&W vs. Color vision : Rods vs. Cones

  4. B&W vs. Color vision : Rods vs. Cones ColorVision Experiment/Exercise

  5. Observed color Absorbed color (nm) (nm)

  6. ColorsofBlood • Result from absorption of visible radiation by hemoglobin: • A protein that contains Fe(II) bonded through d-orbitals to an organic molecule referred to as porphyrin • Occurs when radiation has the quantum energy needed to raise an e-from its ground state to an excited state • Oxygenated blood is bright red  ~ 620 nm; Deoxygenated blood is dark bluish-red

  7. https://www.youtube.com/watch?v=8OC5rji1stI&feature=push-u&attr_tag=uR2iOHN7_TVAYFW5-6https://www.youtube.com/watch?v=8OC5rji1stI&feature=push-u&attr_tag=uR2iOHN7_TVAYFW5-6 Iron (II) plus Porphyrin 2+ heme https://www.youtube.com/watch?v=WLI1ooXfEVs

  8. Hemoglobin & Myoglobin proteins that transport and store O2

  9. Fe2+ in Oxymyoglobin and Oxyhemoglobin

  10. Halloween / All Hallows Eve A vampire encounter? Is Bram Stoker’s “Dracula” pure fiction? Do vampires have any preference arterial or venous blood?

  11. What follows All Hallows Day? Día de los Muertos / Day of the Dead

  12. The Link Between the Two Days? Vampires & Porphyria?Eduard Munch

  13. Porphyria Erythropoietic porphyria symptoms: severe photosensitivity, swelling, pain, and burning; requires avoidance of bright sunlight; produces brown canine teeth that fluoresce in ultraviolet light; produces hemolytic anemia. Drinking large quantities of blood can alleviate the symptoms. Garlic activates an enzyme that destroys them faster and makes the symptoms of porphyria worse. http://en.wikipedia.org/wiki/Porphyria Q. "Why is a baby like a vampire? A "Because it sleeps all day and feeds all night."

  14. Edvard Munch (1863–1944) SF MOMA July 1-October 5, 2017 Eduard Munch

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