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Uline was founded in 1980 by Elizabeth "Liz" and Richard "Dick" Uihlein. Richard Uihlein is a descendant of the brewers of Schlitz beer. [1] With start-up funds from his father, Edgar Uihlein, Richard and Elizabeth founded the company from their basement after recognizing a local need for a shipping supply distributor.
In slide rule terminology, "folded" means a scale that starts and finishes at values offset from a power of 10. Often folded scales start at π but may be extended lengthways to, say, 3.0 and 35.0. Folded scales with the code subscripted with "M" start and finish at log 10 e to simplify conversion between base-10 and natural logarithms. When ...
Best rational approximants for π (green circle), e (blue diamond), ϕ (pink oblong), (√3)/2 (grey hexagon), 1/√2 (red octagon) and 1/√3 (orange triangle) calculated from their continued fraction expansions, plotted as slopes y/x with errors from their true values (black dashes)
Use a steady surface: When using a scale, always place it on a steady surface and clear the area of other objects. Otherwise, if the table is wobbling, the bowl on the scale can wobble as well ...
That year, with start-up funds from his father, Uihlein and his wife Elizabeth (Liz) Uihlein founded Uline, a shipping supplies company; the couple continue to own the company. [ 8 ] [ 9 ] The company expanded rapidly and is now one of the largest U.S. privately held companies; in 2014, Forbes estimated a company value of between $700 million ...
HLB scale showing classification of surfactant function. The hydrophilic–lipophilic balance (HLB) of a surfactant is a measure of its degree of hydrophilicity or lipophilicity, determined by calculating percentages of molecular weights for the hydrophilic and lipophilic portions of the surfactant molecule, as described by Griffin in 1949 [1] [2] and 1954. [3]
Fractionation at total reflux. The Fenske equation in continuous fractional distillation is an equation used for calculating the minimum number of theoretical plates required for the separation of a binary feed stream by a fractionation column that is being operated at total reflux (i.e., which means that no overhead product distillate is being withdrawn from the column).
The Ohnesorge number (Oh) is a dimensionless number that relates the viscous forces to inertial and surface tension forces. The number was defined by Wolfgang von Ohnesorge in his 1936 doctoral thesis. [1] [2] It is defined as:
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