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  2. Tooth whitening - Wikipedia

    en.wikipedia.org/wiki/Tooth_whitening

    The tooth whitening endpoint does depend on the frequency of use and ingredients of the product. [1] Whitening gels are applied onto the tooth surface with a small brush. [1] The gels contain peroxide and are recommended to be applied twice a day for 14 days. [1] The tooth whitening endpoint like that of the whitening strips. [1]

  3. Luminous efficacy - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficacy

    Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.

  4. Bleach - Wikipedia

    en.wikipedia.org/wiki/Bleach

    [20] Peracetic (peroxoacetic) acid (H 3 CC(O)OOH). Generated in situ by some laundry detergents, and also marketed for use as industrial and agricultural disinfection and water treatment. [21] Benzoyl peroxide ((C 6 H 5 COO) 2). It is used in topical medications for acne [19] and to bleach flour. [22] Ozone (O 3). While not properly a peroxide ...

  5. Zero-coupon bond - Wikipedia

    en.wikipedia.org/wiki/Zero-coupon_bond

    Zero coupon bonds have a duration equal to the bond's time to maturity, which makes them sensitive to any changes in the interest rates. Investment banks or dealers may separate coupons from the principal of coupon bonds, which is known as the residue, so that different investors may receive the principal and each of the coupon payments.

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