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  2. No-observed-adverse-effect level - Wikipedia

    en.wikipedia.org/wiki/No-observed-adverse-effect...

    The NOAEL is determined or proposed by qualified personnel, often a pharmacologist or a toxicologist. [citation needed] The NOAEL could be defined as "the highest experimental point that is without adverse effect," meaning that under laboratory conditions, it is the level where there are no side-effects. It either does not provide the effects ...

  3. Reference dose - Wikipedia

    en.wikipedia.org/wiki/Reference_dose

    Cholinesterase inhibition was observed at all dose levels tested, and a NOAEL of 0.03 mg/kg/day estimated by dividing a LOAEL of 0.3 mg/kg/day by an uncertainty factor of 10. As with the acute RfD, the chronic RfD of 3×10 −4 mg/kg/day was determined by dividing this NOAEL by the inter- and intraspecies uncertainty factors.

  4. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Commutator (ring theory): if a and b belong to a ring, then [,] =. 4. Denotes the Lie bracket, the operation of a Lie algebra. [ : ] 1. Degree of a field extension: if F is an extension of a field E, then [:] denotes the degree of the field extension /.

  5. Ring (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Ring_(mathematics)

    A ring is a set R equipped with two binary operations [a] + (addition) and ⋅ (multiplication) satisfying the following three sets of axioms, called the ring axioms: [1] [2] [3] R is an abelian group under addition, meaning that: (a + b) + c = a + (b + c) for all a, b, c in R (that is, + is associative). a + b = b + a for all a, b in R (that ...

  6. The symbolism and meaning behind different engagement ring shapes

    www.aol.com/symbolism-meaning-behind-different...

    The ring setting and diamond shape determine what an engagement ring symbolizes. Each shape and setting has its own meaning and style. What does a round cut engagement ring symbolize?

  7. Does Zendaya’s engagement ring have a hidden meaning ... - AOL

    www.aol.com/does-zendaya-engagement-ring-hidden...

    What is the meaning of Zendaya's engagement ring? Jewelers break down the meaning, style, setting carats and price of the diamond. Inside the east west diamond.

  8. Glossary of numismatics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_numismatics

    A coin with one type of metal in the center with an outer ring of a different metal. Examples are the 1 and 2 Euro coins and the Canadian "toonie" two-dollar coin. blank. Also called a planchet or flan. 1. A prepared disk of metal on which the design for a coin will be stamped. [1] 2. The un-struck or flat side of a uniface coin or medal. brass

  9. The Hidden Meaning Behind Meghan Markle's Engagement Ring - AOL

    www.aol.com/lifestyle/hidden-meaning-behind...

    In 2017, Prince Harry proposed to Meghan Markle with a custom ring that will (quite possibly) go down in history as one of the most iconic royal engagement rings of all time. The three-stone ...