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  • Why does my Patton-Reeder indicator immediately turn blue? (Ca2 conc. )
    The discussion revolves around the use of the Patton-Reeder (PR) indicator in measuring calcium ion concentration using the EDTA method Participants explore the effects of pH, the presence of other ions, and the preparation of the calcium solution, with a focus on troubleshooting unexpected color changes in the indicator One participant notes that the PR indicator turns dark blue immediately
  • Understanding FTIR Peaks of PO4 Compounds • Physics Forums
    The discussion focuses on the interpretation of FTIR (Fourier Transform Infrared Spectroscopy) peaks for PO4 (phosphate) compounds It establishes that multiple peaks at different wavelengths arise from various vibrational modes of the molecule, including stretching and bending vibrations Specifically, the modes v1, v3, and v4 correspond to distinct types of molecular vibrations, such as
  • Pink salmon — too much of a good thing? | Geophysical Institute
    Pink salmon born in hatcheries, where professionals harvest eggs from wild salmon and rear them in captivity before releasing them in the ocean, have doubled in numbers since 1990 Russians have pink salmon hatcheries that increase numbers in the North Pacific and Bering Sea Alaskans run hatcheries in Valdez and other places in Prince William
  • Ice Worms | Geophysical Institute
    Ice worms eat airborne pollen grains, fern spores and the red algae that lives in snow and sometimes colors it pink Unable to exist at temperatures much below freezing, ice worms must remain in temperate glaciers
  • Why Does the Pink Color in a Titration Fade Over Time?
    The discussion revolves around the fading of the pink color produced by phenolphthalein during a titration over time Participants explore various chemical processes and factors that may contribute to this phenomenon, including equilibrium shifts, hydrolysis, and the absorption of carbon dioxide
  • Why does a Walrus Blush? | Geophysical Institute
    The skin of walruses becomes pallid when it is exposed to cold air or water and changes to pink when exposed to warmer ambient temperatures This color change may indicate that the circulatory output to the skin is altered to control their total body heat loss
  • Preparation of murexide indicator for Ca measurement
    Murexide (ammonium purpurate) indicator: This indicator changes from pink to purple at the end point Prepare by dissolving 150 mg dye in 100 g absolute ethylene glycol Water solutions of the dye are not stable for longer than 1 d A ground mixture of dye powder and sodium chloride (NaCl) provides a stable form of the indicator Prepare by
  • Great Comets, Great Floods | Geophysical Institute
    This column's topic was dictated by a concatenation of coincidence--otherwise, known as fate, or luck Consider: in mid-July 1994, much of the state of Georgia was submerged under the rainy aftermath of a tropical storm, while parts of Alaska's Interior were drying out after their own mini-deluge Meanwhile, the shards of a big comet descended into the atmosphere of Jupiter, there generating
  • Exploration into the Physics of Rainbows
    The simplest explanation of rainbow physics is based on internal reflections in the near-spherical shape of a raindrop
  • Slugs ooze over Southeast Alaska | Geophysical Institute
    Pink salmon squirting like greased torpedoes through clear lagoons The pop of kelp air sacks when stepped on at low tide A salty tang in the air But maybe the most striking thing was oozing along a wet trail by our boots: A slug The length of a child’s pinkie finger, the slug had four antennae protruding from its face, but no eyes





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