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  2. Waldo Semon - Wikipedia

    en.wikipedia.org/wiki/Waldo_Semon

    Charles Goodyear Medal (1944) Elliott Cresson Medal (1964) Scientific career. Fields. Chemistry. Waldo Lonsbury Semon (September 10, 1898 – May 26, 1999) was an American inventor born in Demopolis, Alabama. [1] He is credited with inventing methods for making polyvinyl chloride useful. [2]

  3. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  4. Synthetic rubber - Wikipedia

    en.wikipedia.org/wiki/Synthetic_rubber

    Sheet of synthetic rubber coming off the rolling mill at the plant of Goodrich (1941) World War II poster about synthetic rubber tires. Production of synthetic rubber in the United States expanded greatly during World War II since the Axis powers controlled nearly all the world's limited supplies of natural rubber by mid-1942, following the Japanese conquest of most of Asia, particularly in ...

  5. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.

  6. Per- and polyfluoroalkyl substances - Wikipedia

    en.wikipedia.org/wiki/Per-_and_polyfluoroalkyl...

    Definition. Per- and polyfluoroalkyl substances are a group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain. Different organizations use different definitions for PFAS, leading to estimates of between 8,000 and 7 million chemicals within the group.

  7. SS Lurline (1932) - Wikipedia

    en.wikipedia.org/wiki/SS_Lurline_(1932)

    SS Lurline was christened on 12 July 1932 in Quincy, Massachusetts, by Lurline Matson Roth for the Matson Lines ' Pacific services. Lurline was the last of the four American-built Matson "White Fleet" liners designed by William Francis Gibbs; Roth, the daughter of the Matson Lines' founder, previously had christened a namesake 1908 steamship ...

  8. List of medical roots, suffixes and prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_medical_roots...

    This is a list of roots, suffixes, and prefixes used in medical terminology, their meanings, and their etymologies.Most of them are combining forms in Neo-Latin and hence international scientific vocabulary.

  9. List of Journey band members - Wikipedia

    en.wikipedia.org/wiki/List_of_Journey_band_members

    The band's lineup as of 2021 [update] features Schon, alongside keyboardist and rhythm guitarist Jonathan Cain (since 1980), drummer and vocalist Deen Castronovo (from 1998–2015 and since 2021), vocalist Arnel Pineda (since 2007), keyboardist and vocalist Jason Derlatka (since 2019), and bassist Todd Jensen (since 2021).