hydrogen bond

noun

Definition of hydrogen bond

: an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as of oxygen, nitrogen, or fluorine) in usually another molecule of the same or a different polar substance

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At that temperature, the hydrogen bonds in the hair will break then reform in the shape of the curls. — Jessica Cruel, SELF, "12 Common Curling Iron Mistakes and How to Stop Making Them," 8 June 2018 Hair consists of keratin, a protein that is wound into a coil held together by hydrogen bonds. — Tom Skilling, chicagotribune.com, "Ask Tom: Why does humid weather affect hair?," 4 May 2018 These channels and cell walls collapse during the heat-and-squeeze part of the researchers' process and new hydrogen bonds form between cellulose molecules, toughening the material. — Marissa Fessenden, Smithsonian, "New Super Wood Beats Metals in Feats of Strength," 10 Feb. 2018 The hydrogen bonds form in a such a way that the polymer doesn't crystallize, giving the molecular chains the ability to move freely, and easily combine when pieces of the substance are compressed. — Andrew Wagner, Science | AAAS, "This new material heals—not cracks—under pressure," 14 Dec. 2017

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