gray

(noun)

The derived SI unit of radiation dose defined as the absorption of one joule of radiation energy by one kilogram of matter. Symbol: Gy.

Related Terms

  • joule
  • sievert
  • dosimetry

Examples of gray in the following topics:

  • The Payne Rearrangement

    • The first diagram below illustrates three such reactions, and a general mechanism is written in the gray-shaded box.
    • The course of reaction in the absence of the Payne rearrangement is displayed in the gray-shaded box.
  • Measuring Radiation Exposure

    • Dose is reported in gray (Gy) for matter or sieverts (Sv) for biological tissue, where 1 Gy or 1 Sv is equal to 1 joule per kilogram.
    • Define the terms used to define radiation exposure, the gray (Gy) and sievert (Sv)
  • Silicate Units, Silicate Chains, Silicate Sheets

    • Ball-and-stick model of the silicate tetrahedron; red represents oxygen atoms and gray represents the silicon atom in the center.
    • Red balls correspond to oxygen, and gray to silicon atoms.
  • Photochemistry

    • Several secondary radical reactions then follow (shown in the gray box), making it difficult to assign a quantum yield to the primary reaction.
  • Grob Fragmentation

    • The non-ethylagous analog for the reaction is drawn in the gray-shaded box.
  • Ionic Radius

    • The neutral atoms are colored gray, cations red, and anions blue.
  • Crystal Structure: Packing Spheres

    • Calcium ions are depicted as gray spheres, and fluorine ions are yellow.
  • Steelmaking and Refining

    • Henry Cort's original puddling process only worked when the raw material was white cast iron, rather than the gray pig iron that was the usual raw material for finery forges.
    • For the gray pig iron to be usable, a preliminary refining process was developed to remove the silicon.
  • Pericyclic Reactions

    • All these reactions are potentially reversible (note the gray arrows).
  • Carbon-Carbon Bond Formation

    • The structure of this compound is shown in the gray box at the upper left of the first diagram below.
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