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  2. Wikipedia talk : WikiProject Chemistry/CAS validation

    en.wikipedia.org/.../CAS_validation

    CAS, a division of the American Chemical Society, is pleased to announce that it will contribute to the Wikipedia project. CAS will work with Wikipedia to help provide accurate CAS Registry Numbers ® for current substances listed in Wikiprojects-Chemicals section of the Wikipedia Chemistry Portal that are of widespread general public interest.

  3. Chemical Abstracts Service - Wikipedia

    en.wikipedia.org/wiki/Chemical_Abstracts_Service

    Chemical Abstracts Service Building B in August 2009. Columbus, Ohio. STN (Scientific & Technical Information Network) International is operated jointly [4] by CAS and FIZ Karlsruhe, and is intended primarily for information professionals, using a command language interface.

  4. Reaxys - Wikipedia

    en.wikipedia.org/wiki/Reaxys

    Reaxys is a web-based tool for the retrieval of information about chemical compounds and data from published literature, including journals and patents. The information includes chemical compounds, chemical reactions, chemical properties, related bibliographic data, substance data with synthesis planning information, as well as experimental procedures from selected journals and patents.

  5. Compare-and-swap - Wikipedia

    en.wikipedia.org/wiki/Compare-and-swap

    Based on that old value, they compute some new value. Then they try to swap in the new value using CAS, where the comparison checks for the location still being equal to the old value. If CAS indicates that the attempt has failed, it has to be repeated from the beginning: the location is re-read, a new value is re-computed and the CAS is tried ...

  6. Computer algebra system - Wikipedia

    en.wikipedia.org/wiki/Computer_algebra_system

    The movement to web-based applications in the early 2000s saw the release of WolframAlpha, an online search engine and CAS which includes the capabilities of Mathematica. [5] More recently, computer algebra systems have been implemented using artificial neural networks, though as of 2020 they are not commercially available. [6]

  7. Stranger Things season 4 - Wikipedia

    en.wikipedia.org/wiki/Stranger_Things_season_4

    On October 2, 2020, the show's various social media accounts posted two photographs from different sets: A poster for a pep rally hanging in a hallway at Hawkins High, and a clapperboard in front of a grandfather clock in the Upside Down, a scene that was first depicted in the season's initial teaser trailer. [73]

  8. Calcium sulfide - Wikipedia

    en.wikipedia.org/wiki/Calcium_sulfide

    CaSO 4 + 2 C → CaS + 2 CO 2. and can react further: 3 CaSO 4 + CaS4 CaO + 4 SO 2. In the second reaction the sulfate (+6 oxidation state) oxidizes the sulfide (-2 oxidation state) to sulfur dioxide (+4 oxidation state), while it is being reduced to sulfur dioxide itself (+4 oxidation state). CaS is also a byproduct in the Leblanc process ...

  9. MacGyver (2016 TV series) season 4 - Wikipedia

    en.wikipedia.org/wiki/MacGyver_(2016_TV_series...

    It was later revealed that the season would premiere on February 7, 2020, after being pushed to mid-season to make room for Magnum P.I. on CBS' Friday schedule. [15] On November 6, 2019, it was revealed that CBS had ordered nine additional episodes which would’ve brought the season order to twenty-two episodes. [ 16 ]