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  2. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    Parts-per notation is often used describing dilute solutions in chemistry, for instance, the relative abundance of dissolved minerals or pollutants in water.The quantity "1 ppm" can be used for a mass fraction if a water-borne pollutant is present at one-millionth of a gram per gram of sample solution.

  3. PPH - Wikipedia

    en.wikipedia.org/wiki/PPH

    Pound per hour (symbol pph), mass flow unit (used in aviation to measure fuel flow, for instance) Part per hundred (percentage) People per hour , a measure of the rate of flow of people moving past a fixed point or through a system

  4. Patent Prosecution Highway - Wikipedia

    en.wikipedia.org/wiki/Patent_Prosecution_Highway

    The Patent Prosecution Highway (PPH) is a set of initiatives for providing accelerated patent prosecution procedures by sharing information between some patent offices. [1] It also permits each participating patent office to benefit from the work previously done by the other patent office, with the goal of reducing examination workload and ...

  5. Stapled hemorrhoidopexy - Wikipedia

    en.wikipedia.org/wiki/Stapled_hemorrhoidopexy

    PPH uses a circular stapler to reduce the degree of prolapse. The procedure avoids the need for wounds in the sensitive perianal area thus reducing post-operative pain considerably, and facilitates a speedier return to normal activities. This procedure is for internal hemorrhoids only and not for external hemorrhoids or anal fissures. [2] [3] [4]