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  2. NTU method - Wikipedia

    en.wikipedia.org/wiki/NTU_Method

    The number of transfer units (NTU) method is used to calculate the rate of heat transfer in heat exchangers (especially parallel flow, counter current, and cross-flow exchangers) when there is insufficient information to calculate the log mean temperature difference (LMTD). Alternatively, this method is useful for determining the expected heat ...

  3. Turbidity - Wikipedia

    en.wikipedia.org/wiki/Turbidity

    In the United States, public water systems that use conventional or direct filtration methods must not have a turbidity higher than 1.0 NTU at the plant outlet and all samples for turbidity must be less than or equal to 0.3 NTU for at least 95 percent of the samples in any month. Systems that use filtration other than the conventional or direct ...

  4. Useful conversions and formulas for air dispersion modeling

    en.wikipedia.org/wiki/Useful_conversions_and...

    As an example, given a concentration of 260 mg/m 3 at sea level, calculate the equivalent concentration at an altitude of 1,800 meters: C a = 260 × 0.9877 18 = 208 mg/m 3 at 1,800 meters altitude Standard conditions for gas volumes

  5. Formazine - Wikipedia

    en.wikipedia.org/wiki/Formazine

    Formazine (formazin) is a heterocyclic polymer produced by reaction of hexamethylenetetramine with hydrazine sulfate.. Turbidity standards of 5, 50, and 500 NTU. The hexamethylenetetramine tetrahedral cage-like structure, similar to adamantane, serves as molecular building block to form a tridimensional polymeric network.

  6. Baby Has $5 Million Surgery to Remove Left Side of Brain at ...

    www.aol.com/baby-5-million-surgery-remove...

    Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer , from celebrity news to compelling human interest stories. The Mesa Family

  7. Nephelometer - Wikipedia

    en.wikipedia.org/wiki/Nephelometer

    A nephelometer installation at Acadia National Park Turbidimeters used at a water purification plant to measure turbidity (in NTU) of raw water and clear water after filtration Because optical properties depend on suspended particle size, a stable synthetic material called " Formazin " with uniform particle size is often used as a standard for ...

  8. Rudy Gay announces retirement after 17 seasons in the NBA - AOL

    www.aol.com/sports/rudy-gay-announces-retirement...

    Gay is one of four players — along with Carmelo Anthony, LeBron James and Chris Paul — to average 10 or more points between 2006-07 and 2020-21.

  9. Arkansas dessert with an animal in its name is award-winning ...

    www.aol.com/arkansas-dessert-animal-name-award...

    The Possum Pie is the Natural State's signature dessert with an animal in its name but not in the ingredients. Fox News Digital spoke to an Arkansas baker who describes what's actually in it.