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  2. Kettlewell's experiment - Wikipedia

    en.wikipedia.org/wiki/Kettlewell's_experiment

    Kettlewell's experiment was a biological experiment in the mid-1950s to study the evolutionary mechanism of industrial melanism in the peppered moth (Biston betularia). [ 1 ] [ 2 ] It was executed by Bernard Kettlewell , working as a research fellow in the Department of Zoology, University of Oxford .

  3. Marangoni effect - Wikipedia

    en.wikipedia.org/wiki/Marangoni_effect

    Pepper is sprinkled onto the surface of the water in the left dish; when a droplet of soap is added to that water, the specks of pepper move rapidly outwards. The Marangoni effect (also called the Gibbs–Marangoni effect ) is the mass transfer along an interface between two phases due to a gradient of the surface tension .

  4. Black pepper - Wikipedia

    en.wikipedia.org/wiki/Black_pepper

    Black pepper (Piper nigrum) is a flowering vine in the family Piperaceae, cultivated for its fruit (the peppercorn), which is usually dried and used as a spice and seasoning. The fruit is a drupe (stonefruit) which is about 5 mm (0.20 in) in diameter (fresh and fully mature), dark red, and contains a stone which encloses a single pepper seed.

  5. Peppered moth evolution - Wikipedia

    en.wikipedia.org/wiki/Peppered_moth_evolution

    Biston betularia f. typica, the white-bodied peppered moth Biston betularia f. carbonaria, the black-bodied peppered moth . The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution.

  6. Rasayana - Wikipedia

    en.wikipedia.org/wiki/Rasayana

    The current Rasayana formulas are based on such ingredients as amla (Emblica officinalis) which, if fresh, has high content of vitamin C, Terminalia belerica, Terminalia chebula, shilajit, long pepper, black pepper, ginger, processed guggul, guduchi, ashwaganda, shatavari and similar ingredients. [citation needed]

  7. Elephant's toothpaste - Wikipedia

    en.wikipedia.org/wiki/Elephant's_toothpaste

    Elephant toothpaste reaction Two people watching the reaction of Elephant's toothpaste. Elephant's toothpaste is a foamy substance caused by the quick decomposition of hydrogen peroxide (H 2 O 2) using potassium iodide (KI) or yeast and warm water as a catalyst. [1]

  8. Will Body Wash or Soap Get You Cleaner? -- Savings Experiment

    www.aol.com/news/2011-05-03-savings-experiment...

    For many consumers, body wash has replaced soap, the market research firm says, because of its ease of use and convenience: There's none of the goopy mess often associated with a bar of soap.

  9. Saponification - Wikipedia

    en.wikipedia.org/wiki/Saponification

    These soap lumps may be prominent only on certain regions of the painting rather than throughout. In John Singer Sargent's famous Portrait of Madame X, for example, the lumps only appear on the blackest areas, which may be because of the artist's use of more medium in those areas to compensate for the tendency of black pigments to soak it up.