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  2. Epoxy - Wikipedia

    en.wikipedia.org/wiki/Epoxy

    Polyphenols, such as bisphenol A or novolacs can react with epoxy resins at elevated temperatures (130–180 °C, 266–356 °F), normally in the presence of a catalyst. The resulting material has ether linkages and displays higher chemical and oxidation resistance than typically obtained by curing with amines or anhydrides.

  3. Naturally occurring phenols - Wikipedia

    en.wikipedia.org/wiki/Naturally_occurring_phenols

    The phenolic unit can be found dimerized or further polymerized, creating a new class of polyphenol. For example, ellagic acid is a dimer of gallic acid and forms the class of ellagitannins, or a catechin and a gallocatechin can combine to form the red compound theaflavin, a process that also results in the large class of brown thearubigins in tea.

  4. Phenols - Wikipedia

    en.wikipedia.org/wiki/Phenols

    Phenolic compounds are classified as simple phenols or polyphenols based on the number of phenol units in the molecule. Phenol – the simplest of the phenols Chemical structure of salicylic acid, the active metabolite of aspirin. Phenols are both synthesized industrially and produced by plants and microorganisms. [2]

  5. Texas wants to buy surplus border wall parts but U.S ... - AOL

    www.aol.com/news/texas-wants-buy-surplus-border...

    Texas Lt. Gov. Dan Patrick said U.S.-owned border wall materials, which were available for sale, were pulled from an Arizona auction at the government's request. The Lonestar State had shown ...

  6. AOL Mail

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  7. Polyphenol - Wikipedia

    en.wikipedia.org/wiki/Polyphenol

    Polyphenols (/ ˌ p ɒ l i ˈ f iː n oʊ l,-n ɒ l /) are a large family of naturally occurring phenols. [1] They are abundant in plants and structurally diverse. [1] [2] [3] Polyphenols include phenolic acids, flavonoids, tannic acid, and ellagitannin, some of which have been used historically as dyes and for tanning garments.

  8. Nearly 330,000 smoke alarms sold by HSN recalled due to ...

    www.aol.com/nearly-330-000-smoke-alarms...

    There have been 8 reports of made-in-China alarms sold by HSN nationwide and online not sounding in response to smoke.

  9. Two Indian companies indicted in US for importing ingredients ...

    www.aol.com/news/two-indian-companies-indicted...

    Two Indian chemical companies have been indicted for allegedly importing ingredients for the highly addictive opioid fentanyl into the United States and Mexico, the U.S. Department of Justice said ...