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  2. Cohn process - Wikipedia

    en.wikipedia.org/wiki/Cohn_process

    Fraction V is precipitated at pH 4.8. Fractions I, II, III, and IV are coprecipitated at 40% ethanol, with pH of 5.4 to 7.0, and temperature −3 to −7 degrees C. Fraction V is then precipitated at pH 4.8 and −10 degrees C. The high yields are due to a combination of a simplified process, with lower losses due to coprecipitation, and use of ...

  3. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    But every number, including π, can be represented by an infinite series of nested fractions, called a continued fraction: = + + + + + + + + Truncating the continued fraction at any point yields a rational approximation for π ; the first four of these are 3 , ⁠ 22 / 7 ⁠ , ⁠ 333 / 106 ⁠ , and ⁠ 355 / 113 ⁠ .

  4. 4-8-4 - Wikipedia

    en.wikipedia.org/wiki/4-8-4

    Union Pacific 844, the only steam locomotive never retired by a North American Class I railroad. The 4-8-4 wheel arrangement was a progression from the 4-8-2 Mountain type and, like the 2-8-4 Berkshire and 4-6-4 Hudson types, an example of the "Super Power" concept in steam locomotive design that made use of the larger firebox that could be supported by a four-wheel trailing truck, which ...

  5. Cooking weights and measures - Wikipedia

    en.wikipedia.org/wiki/Cooking_weights_and_measures

    In Canada, a teaspoon is historically 1⁄6 imperial fluid ounce (4.74 mL) and a tablespoon is 1⁄2 imperial fl oz (14.21 mL). In both Britain and Canada, cooking utensils come in 5 mL for teaspoons and 15 mL for tablespoons, hence why it is labelled as that on the chart. The volumetric measures here are for comparison only.

  6. Bombardier 4.8 - Wikipedia

    en.wikipedia.org/wiki/Bombardier_4.8

    The Bombardier 4.8 is a recreational sailboat, built predominantly of fibreglass, with polyurethane flotation and aluminum spars. It has a fractional sloop rig, a raked stem, a vertical transom, a flip-up, transom-hung rudder controlled by a tiller and a flip-up centreboard keel. It displaces 300 lb (136 kg) and can accommodate four people. [1][2]

  7. Euclidean algorithm - Wikipedia

    en.wikipedia.org/wiki/Euclidean_algorithm

    The number 1 (expressed as a fraction 1/1) is placed at the root of the tree, and the location of any other number a/b can be found by computing gcd(a,b) using the original form of the Euclidean algorithm, in which each step replaces the larger of the two given numbers by its difference with the smaller number (not its remainder), stopping when ...

  8. Chronology of the universe - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_the_universe

    This is equivalent to a linear increase of at least 10 26 times in every spatial dimension—equivalent to an object 1 nanometre (10 −9 m, about half the width of a molecule of DNA) in length, expanding to one approximately 10.6 light-years (100 trillion kilometres) long in a tiny fraction of a second.

  9. Section 8 (housing) - Wikipedia

    en.wikipedia.org/wiki/Section_8_(housing)

    The main Section 8 program involves the voucher program. A voucher may be either "project-based"—where its use is limited to a specific apartment complex (public housing agencies (PHAs) may reserve up to 20% of its vouchers as such [9])—or "tenant-based", where the tenant is free to choose a unit in the private sector, is not limited to specific complexes, and may reside anywhere in the ...