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  2. Lipid bilayer - Wikipedia

    en.wikipedia.org/wiki/Lipid_bilayer

    The lipid bilayer is the barrier that keeps ions, proteins and other molecules where they are needed and prevents them from diffusing into areas where they should not be. Lipid bilayers are ideally suited to this role, even though they are only a few nanometers in width, [2] because they are impermeable to most water-soluble (hydrophilic ...

  3. Vapor barrier - Wikipedia

    en.wikipedia.org/wiki/Vapor_barrier

    A vapor barrier on the warm side of the envelope must be combined with a venting path on the cold side of the insulation. This is because no vapor barrier is perfect, and because water may get into the structure, typically from rain. In general, the better the vapor barrier and the drier the conditions, the less venting is required. [7]

  4. Mesoamerican Barrier Reef System - Wikipedia

    en.wikipedia.org/wiki/Mesoamerican_Barrier_Reef...

    A coral skeleton from the Mesoamerican Barrier Reef System, Quintana Roo, Mexico The Mesoamerican Barrier Reef System (MBRS), also popularly known as the Great Mayan Reef or Great Maya Reef, is a marine region that stretches over 1,126 kilometres (700 mi) along the coasts of four countries – Mexico, Belize, Guatemala, and Honduras – from Isla Contoy at the northern tip of the Yucatán ...

  5. Retired NFL kicker Martin Gramatica shares heart-wrenching ...

    www.aol.com/retired-nfl-kicker-martin-gramatica...

    Retired kicker Martin Gramatica of the Tampa Bay Buccaneers watches pregame ceremonies during a game against the San Francisco 49ers Dec. 15, 2013, at Raymond James Stadium in Tampa, Fla.

  6. 20 years later: A look at the deadliest disaster to strike ...

    www.aol.com/20-years-later-look-deadliest...

    On the morning of Dec. 26, 2004, an estimated 9.2-magnitude earthquake violently shook the seafloor off Indonesia, sending a 100-foot wall of water towards communities around the Indian Ocean.

  7. How to watch the 'Yellowstone' series finale: Where to stream ...

    www.aol.com/entertainment/watch-yellowstone...

    Yellowstone timeline explained. While the hit show Yellowstone may have come out first, the Dutton family tree goes back much further than the Paramount show’s premiere. The series has two ...

  8. Biological membrane - Wikipedia

    en.wikipedia.org/wiki/Biological_membrane

    Cross-sectional view of the structures that can be formed by phospholipids in an aqueous solution. A biological membrane, biomembrane or cell membrane is a selectively permeable membrane that separates the interior of a cell from the external environment or creates intracellular compartments by serving as a boundary between one part of the cell and another.

  9. Food storage - Wikipedia

    en.wikipedia.org/wiki/Food_storage

    Food storage in refrigerators may not be safe unless there is close adherence to temperature guidelines. In general the temperature should be maintained at 4 °C (39 °F) or below but never below 1 °C (34 °F). [8] Safe storage times vary from food to food and may depend on how the food has been treated prior to being placed in the refrigerator.